GLC X253/C253

Mercedes-Benz FBS2 1998-2003 AKL

Mercedes FBS2 (DAS2) All Keys Lost Procedure Guide

1998-2003

Infrared "Flip" Key System

CRITICAL INFORMATION

System Overview

FBS2 (Fahrberechtigungssystem 2) / DAS2 (Drive Authorization System 2) is Mercedes-Benz's infrared-based immobilizer system used from approximately 1998-2003.

Key Variants

FBS2: Base system with infrared transmitter only

FBS2a: Adds passive transponder (NEC chip) with L11 ring antenna on ignition

FBS2b: Radio frequency system (W168, W170, W163 only - not covered in this guide)

Compatible Vehicles

W140 (S-Class 1991-1998 late)

W202 (C-Class 1993-2000)

W208 (CLK-Class 1996-2003)

W210 (E-Class 1995-2002)

W463 (G-Class)

W220 (S-Class 1998-2005 early)

W163 (ML-Class)

W129 (SL-Class)

AKL Method

FBS2 AKL typically requires bench work. OBD methods are limited and often only work for key addition when at least one working key is available. Most AKL scenarios require direct EIS/EZS module connection.

Key Components

EIS/EZS Module: Electronic Ignition Switch containing immobilizer controller

IR Receiver: Located on interior mirror or dashboard

ESL (if equipped): Electronic Steering Lock

Key: Single-button infrared flip key with optional NEC transponder

GENERAL AKL PROCEDURE

Method 1: OBD Approach (Limited - Usually Add Key Only)

Requirements

Original working key (for most procedures)

Specialized adapter cables

Online calculation service access

IR key programmer capability

Process

Connect diagnostic tool via OBD port

Read EIS/EZS data and password using working key or special procedures

Calculate password via online service (typically 5-15 minutes)

Generate new key data

Program infrared component to new key

Write transponder (FBS2a only)

Test key operation

Method 2: Bench Work (Primary AKL Method)

Requirements

EIS/EZS module removal from vehicle

Bench connection cables/adapter

IR programming capability

Power supply (12V)

EEPROM programmer (some cases)

Process

Remove EIS/EZS module from vehicle (typically behind steering column or dash)

Identify module type (check part number)

Connect module to bench adapter with proper pinout

Apply 12V power to module

Extract password via direct communication or EEPROM read

Generate virgin key data or write existing key data

Program infrared key via IR adapter

Write NEC transponder if FBS2a

Test on bench before reinstallation

Reinstall module and verify operation

EEPROM Work (Alternative)

Required for damaged modules or specific variants

Read EEPROM chip (typically 24C04, 93C46, or similar)

Make backup of original data

Generate virgin/service dump

Write modified EEPROM

Program keys

TOOL-SPECIFIC PROCEDURES

VVDI2 / VVDI MB Tool

Capability: VVDI2 has limited FBS2 support. Use VVDI MB Tool for proper FBS2 work.

VVDI MB Tool Method

Remove EIS/EZS and connect via K-Line adapter or IR adapter

Power module with VVDI MB Power Adapter

Select vehicle chassis (W202/W208/W210/W140/W220)

Read password via IR adapter (ZN036 equivalent)

Calculate password online (automatic)

Prepare key file for specific position

Write key via IR slot in adapter

For FBS2a: Write NEC chip via NEC adapter

Verify key on bench

Notes: IR adapter and power adapter are essential. VVDI2 does NOT properly support PCF7930/7931/7935 transponders used in early systems.

Autel IM608 / IM508 (with XP400)

Capability: Good FBS2/FBS3 support with G-BOX adapter

Method

Bench Required: Remove EIS/EZS module

Connect G-BOX2 or G-BOX3 to IM608/IM508

Connect EIS via proper wiring harness (follow pinout diagram)

Power via G-BOX adapter

Navigate: IMMO > Mercedes-Benz > Smart Selection > All Keys Lost (Fast) > On Bench (G-Box Fast)

Select EIS type (W202/W208/W210/etc.)

Tool reads module and calculates password (5-20 minutes)

Insert XP400 with blank key

Program key via guided procedure

Test before reinstallation

OBD Option (Very Limited): Some W204/W207 models only - typically add key function.

ABRITES AVDI

Capability: Excellent FBS2 support with proper licenses and hardware

Required Hardware

AVDI Interface with active AMS subscription

MN026 Special Function (Key Programming, EIS/ESL/DAS Manager)

ZN002 or ZN003 PROTAG Programmer

ZN030 ABPROG or ZN076 IR Adapter

ZN051 Distribution Box

Abrites IR keys (TA13, TA14, TA15, TA52)

Method

Remove and connect EIS/EZS via Distribution Box

Follow pinout diagrams for specific chassis

Use DAS Manager function

Extract password via IR adapter method

For AKL: May require specific cable configurations

Generate key dump via PROTAG or online calculation

Write key via PROTAG IR slot or ABPROG with NEC adapter

Enable key position in software

Verify functionality

Advantage: Can handle virgin modules, personalization, and complex scenarios.

Advanced Diagnostics Smart Pro

Capability: Good FBS2/FBS3 coverage with Smart Programmer addon

Required Hardware

Smart Pro base unit

ADC260 Mercedes Smart Programmer

ADS2298 Mercedes Software Module

IR-compatible keys (POD-BENZ-4B1 or similar)

Method

Connect Smart Programmer to Smart Pro via USB

OBD Connection: Can attempt OBD first (requires working key)

Emulator Method: Use key emulator from ADC260 if no working key

Tool reads vehicle/module data

Online password calculation via server (internet required)

Insert blank IR key into Smart Programmer IR slot

Follow guided programming sequence

Program up to 8 keys without deleting existing

Verify remote and start functions

Limitations: Full AKL support varies by model year; primarily add key function.

OBDSTAR X300 DP Plus / G3

Capability: Limited direct FBS2 AKL support

Method

OBDSTAR primarily supports FBS3 and later for full AKL

For FBS2: May support key addition with working key via OBD

EEPROM work possible via P001 programmer for module manipulation

Bench work required for most AKL scenarios

Check specific model coverage in software before proceeding

Note: Not the primary tool choice for FBS2 AKL work.

XTOOL X100 Pad3 / Pad Elite

Capability: FBS2/FBS3 support with KC501 IR programmer

Required Hardware

X100 Pad3 or Pad Elite

KC501 Key & Chip Programmer (for IR key programming)

M821 Adapter (for faster EIS calculation - optional)

Method

Remove EIS/EZS module for AKL scenarios

Connect via M821 adapter if available (bench mode)

Navigate to Mercedes immobilizer functions

Read EIS data and extract password

Calculate password (may require online service)

Connect KC501 to Pad3

Insert blank IR key into KC501 IR slot

Program key data via guided procedure

Write NEC transponder if FBS2a

Verify on bench

OBD Option: Very limited for FBS2 AKL.

CGDI MB / CGDI Prog

Capability: Strong FBS2 support including K-Line variants

Method

Connect via OBD for K-Line variants (W202/W208/W210 1997-1998)

For AKL: Bench work typically required

Connect EIS module via NEC adapter or direct cables

Read module data

Calculate password online (typically 8-10 attempts for valid data)

Generate key file for specific position

Write key via IR adapter or NEC adapter (FBS2a)

Use various cable configurations for different chassis

Verify before reinstallation

Advantage: Good K-Line vehicle support; affordable option.

Key Tool Plus (Xhorse)

Capability: Similar to VVDI MB Tool with IR capabilities

Method

Bench work required for AKL

Connect EIS/EZS via appropriate adapter

Use built-in IR port for key reading/writing

Follow Mercedes immobilizer procedures

Calculate password via Xhorse server

Program IR key via integrated IR reader

Write NEC chip if applicable

Test key before reinstallation

COMMON CHALLENGES & SOLUTIONS

Password calculation failures

Solution: Ensure proper module connection, stable power supply, verify module is not damaged

IR key not responding after programming

Solution: Check IR receiver in vehicle, verify key battery, re-sync key using synchronization procedure

Key starts vehicle but remote doesn't work

Solution: IR remote requires separate synchronization - point key at IR receiver, press button, turn ignition within 30 seconds

FBS2a transponder not recognized

Solution: Verify L11 ring antenna connection at ignition lock, ensure NEC chip is properly written

Module shows as locked or damaged

Solution: May require virgin EEPROM or module replacement; check for physical damage

KEY SYNCHRONIZATION (If Remote Not Working)

FBS2

Point key at IR receiver (interior mirror)

Press and release key button once

Within 30 seconds, turn ignition to position 2

Remote should now respond

FBS2a

Point key at IR receiver

Press and release key button twice quickly

Within 30 seconds, turn ignition to position 2

Test remote function

PROFESSIONAL TIPS

Always make EEPROM backups before any modification

Document original key positions before AKL work

Test programmed keys on bench before vehicle reinstallation

Keep module powered during programming to prevent corruption

IR keys may require 315MHz (USA) or 433MHz (Europe) configuration

Maximum 8 keys can be programmed to most FBS2 systems

Online calculations typically take 5-20 minutes depending on server load

For FBS2a, both IR and transponder must be programmed successfully

SAFETY REMINDERS

Disconnect vehicle battery before removing EIS/EZS

Use proper ESD protection when handling electronic modules

Never force connections - verify pinouts carefully

Keep backups of all original data

Document all procedures for customer records

Verify VIN matches vehicle before programming

This guide covers general procedures for professional automotive locksmiths. Always verify specific tool capabilities and vehicle coverage before proceeding. Module and key part numbers vary by market and production date.

Mercedes-Benz FBS3 2003-2013 AKL

Mercedes FBS3 (DAS3) All Keys Lost Procedure Guide

2003-2013

RF Key with Transponder & ESL System

CRITICAL INFORMATION

System Overview

FBS3 (Fahrberechtigungssystem 3) / DAS3 (Drive Authorization System 3) is Mercedes-Benz's third-generation immobilizer system featuring infrared RF keys, passive transponders, and electronic steering lock (ESL/ELV). Used from approximately 2003-2013, transitioning to FBS4 around 2013-2015 depending on model.

Key Differences from FBS2

Electronic Ignition Switch (EIS/EZS) replaces mechanical ignition

Electronic Steering Lock (ESL/ELV) instead of mechanical lock

RF key with infrared communication and NEC transponder

8 key positions available (vs FBS2's maximum 8 keys)

Password complexity: 8,192 possible 16-digit combinations

Compatible Vehicles (FBS3)

W203 (C-Class 2000-2007)

W204 (C-Class 2007-2014 pre-facelift)

W207 (E-Coupe 2009-2013 pre-facelift)

W209 (CLK 2002-2009)

W211 (E-Class 2002-2009)

W212 (E-Class 2009-2013 pre-facelift)

W164 (ML-Class 2005-2011)

W166 (ML/GL-Class 2011-2013 early)

W169 (A-Class 2004-2012)

W245 (B-Class 2005-2011)

W246 (B-Class 2011-2013 early)

W172 (SLK 2011-2013 early)

W197 (SLS 2010-2013 early)

W216 (CL-Class 2006-2013 pre-facelift)

W218 (CLS 2010-2014 early)

W219 (CLS 2004-2010)

W220 (S-Class 1998-2005)

W221 (S-Class 2005-2013 pre-facelift)

W230 (SL 2001-2011)

W463 (G-Class with FBS3)

W639 (Viano/Vito 2003-2014)

W906 (Sprinter 2006-2018)

NOTE: Mid-2013 onwards, many models transitioned to FBS4 (SA code 803/804). Always verify system before proceeding.

AKL Methods Available

OBD Method

Possible for most FBS3 models

Faster for specific models (W204, W207, W212, W164 2009+, W216, W221)

Requires ESL disconnection in most cases

Online password calculation (5-30 minutes typical)

Vehicle must have stable battery voltage

Bench Method

Universal - Works for ALL FBS3 models

Required when OBD fails or module is damaged

More reliable for older K-Line models (W203, W209, W211 early)

EIS/EZS removal necessary

ESL removal/disconnection typically not required

Key System Components

EIS/EZS: Electronic Ignition Switch (contains immobilizer module, Gateway on some models)

ESL/ELV: Electronic Steering Lock (communicates with EIS, locks steering column)

Key: Infrared RF key with NEC transponder (BGA or NEC chip versions)

Other DAS Modules: May include ECU, TCU, ISM, ESM (all store key data)

GENERAL AKL PROCEDURE

Method 1: OBD Approach (Most Common)

Requirements

Diagnostic tool with FBS3 AKL support

IR key programmer (for programming infrared component)

NEC key adapter (for transponder programming)

Online password calculation service access

Stable internet connection

12V power supply or vehicle battery maintainer

General OBD Process

Vehicle Preparation

Connect battery maintainer to ensure stable voltage (critical!)

Locate ESL connector (usually under steering column)

Disconnect ESL connector (required for most models)

On some models, connect K-Line jumper to specific pins

Connect Diagnostic Tool

Plug into OBD port

Connect IR adapter/programmer as required

Verify communication with EIS/EZS

Read EIS/EZS Data

Select correct chassis (W204, W212, etc.)

Choose "All Keys Lost" function

Tool begins data acquisition (1-50 minutes depending on model)

Progress varies by chassis - W204/W207 fastest (1-5 min with G-BOX), others 15-30 min

Calculate Password

Upload EIS data to online server

Password calculation begins (automatic)

Typically takes 5-30 minutes

Result: 16-digit password extracted from 8,192 combinations

Generate Key File

Enter password into tool

Select unused key position (1-8)

Tool generates key dump file

Preparation time: 10-30 seconds

Program Infrared Key

Insert blank key into IR programmer

Write IR data to key

Time: 30 seconds - 2 minutes

Program Transponder

Connect NEC adapter (if separate step required)

Write transponder data to NEC chip in key

Time: 30 seconds - 1 minute

Reconnect ESL and Test

Reconnect ESL connector

Insert programmed key into EIS

Turn to position 2 - should see "Please wait" or key acceptance

Test start function

Test remote lock/unlock functions

OBD Success Rate

W204/W207/W212/W164(2009+): 95%+ success

W203/W209/W211/W220: 70-85% success (bench often preferred)

Failure usually due to ESL communication issues or damaged EIS

Method 2: Bench Work (Universal Method)

Requirements

Bench connection cables/adapter with correct pinout

Power supply (12V, 3-5A minimum)

IR programmer

NEC key adapter

EEPROM programmer (for backup/recovery scenarios)

General Bench Process

Remove EIS/EZS Module

Typically located behind steering column or in dashboard

Disconnect all connectors (note locations)

Remove mounting screws/bolts

Important: ESL usually stays in vehicle

Identify Module Type

Check part number on EIS label

Determines connection method and pinout

Common types: Motorola (HC05/HC08), NEC, BGA

Connect to Bench Adapter

Follow chassis-specific pinout diagram

Connect power (12V), ground, CAN-H, CAN-L, K-Line (if applicable)

Some tools use DB25 or specialized connectors

Critical: Verify correct wiring before applying power

Apply Power and Read Module

Power up EIS module

Tool communicates via CAN or K-Line

Read EIS data and key information

Time: 2-15 minutes depending on module

Extract/Calculate Password

For Motorola modules: IR password extraction or online calculation

For NEC/BGA modules: Direct read or calculation

Upload data for online password calculation

Time: 5-30 minutes for calculation

Generate Key Data

Input password

Select key position

Generate key dump file

Program Key via IR

Insert blank key in IR slot

Write IR data

Program Transponder

Write NEC chip via adapter

Or use ABPROG/similar for direct chip programming

Test on Bench (If Possible)

Some tools allow key testing before reinstallation

Verify IR communication

Verify transponder recognition

Reinstall and Final Test

Reinstall EIS module in vehicle

Reconnect all connectors

Test key operation

Bench Success Rate: 95%+ for most models when procedure followed correctly

Method 3: EEPROM Work (Recovery/Alternative)

When Required

Damaged EIS module

Communication failure via OBD/bench

Module locked or corrupted

Password extraction fails repeatedly

Process

Remove EIS module

Open module housing

Locate EEPROM chip (varies by module type)

Read EEPROM with programmer (24C series, 93C series common)

Make backup of original data

Modify EEPROM data or generate virgin dump

Write modified EEPROM back to chip

Reassemble and test

Program keys using standard method

ESL/ELV CONSIDERATIONS

ESL Function

Electronic Steering Lock physically locks steering column and communicates with EIS as security verification.

AKL Issues

ESL must be disconnected during OBD password extraction on most models

K-Line connection may be required on some chassis to bypass ESL communication

Failed ESL can prevent key programming - may require ESL emulator

ESL Synchronization required after key programming on some models

ESL Emulators

Used when ESL is failed/removed

Emulates ESL communication to EIS

Required for W204/W207/W212 when ESL removed permanently

Tool-specific emulator programming functions available

TOOL-SPECIFIC PROCEDURES

VVDI MB Tool

Capability: Excellent FBS3 support for all common models

Hardware Required

VVDI MB BGA Tool

IR adapter (included)

NEC adapter (included)

Power adapter (for bench work)

OBD cable

OBD Method

Connect VVDI to vehicle OBD

Disconnect ESL connector

Open VVDI MB software

Select "Password Calculation"

Choose chassis and "All Keys Lost"

Click "Data Acquisition" - wait for completion (5-40 min)

Data uploads automatically

Password calculated and displayed

Click "Key Programming"

Select key position

Insert key in IR slot, program

Use NEC adapter for transponder if needed

Reconnect ESL and test

Bench Method

Remove EIS and connect via bench cables

Power with VVDI MB Power Adapter

Select chassis type

Read EIS data via bench mode

Calculate password (faster than OBD for some models)

Program key via IR adapter

Test before reinstallation

Notes:

V2.1.6+ required for W164/W216 (2009+) AKL

Tokens required (1-2 tokens per AKL typically)

Bench work requires proper cable pinouts

Strong support for W204/W207/W212 AKL

CGDI MB Prog

Capability: Fast and reliable FBS3 support with excellent value

Hardware Required

CGDI MB Programmer

IR adapter (included)

NEC key adapter (included)

OBD cable

K-Line yellow clip (included)

OBD Method

Connect to OBD port

Disconnect ESL and connect yellow K-Line clip if required

Open CGDI MB software

Select "Program Key"

Choose "Without Key" for AKL

Select chassis type

Start data collection (1-50 minutes)

Upload data - password calculated in 40 seconds typical

Load password and generate key file

Write key via IR adapter

Write NEC chip via NEC adapter

Reconnect ESL and test

Bench Method

Remove EIS module

Connect via bench cables (use VVDI cables compatible)

Power with 12V supply

Read EIS data

Calculate password online

Generate and write key

Time: 10-15 minutes typical for W204/W207

Notes:

2 free daily tokens included for 6 months

Very fast password calculation (99% success rate claimed)

Excellent K-Line vehicle support

Works well with BE aftermarket keys

Autel IM608 / IM508 (with XP400)

Capability: Professional-grade FBS3 support with G-BOX adapter

Hardware Required

Autel IM608 or IM508 with XP400 Pro

G-BOX2 or G-BOX3 (highly recommended for AKL)

APB125 IR adapter cable

Bench cables (for bench mode)

OBD Method (With G-BOX)

Connect IM608 to vehicle OBD

Connect G-BOX2/3 to IM608

Disconnect ESL connector

Navigate: IMMO > Mercedes-Benz > Expert Mode > Password Calculation

Select "All Keys Lost (Fast)"

Choose "On Vehicle" mode

Select chassis (W204/W207/W212/etc.)

G-BOX speeds up data reading (8x faster for W204/W207)

Password calculated in 1-20 minutes

Insert blank key in XP400

Follow guided programming sequence

Reconnect ESL and test

Bench Method (With G-BOX)

Remove EIS module

Connect G-BOX3 to IM608 via OBD cable

Connect jumper cables to EIS per wiring diagram

Apply 12V power via G-BOX

Navigate: IMMO > Mercedes > Expert Mode > EIS Tools

Select "Read EIS Data" > "IR" > "On Bench (G-BOX)"

Choose chassis type

Password extraction (1-10 minutes with G-BOX3)

Generate key file

Program via XP400

Test before reinstallation

Notes:

G-BOX3 provides 8x faster calculation vs G-BOX2

Excellent guided procedures with diagrams

No repeated key insertion/removal needed with G-BOX

Strong support across all FBS3 models

Internet required for calculations

ABRITES AVDI

Capability: Most comprehensive FBS3 solution, professional-grade

Hardware Required

AVDI Interface with active AMS

MN026 or MN032 Special Function

ZN002 or ZN003 PROTAG Programmer

ZN051 Distribution Box or ZN041

ZN076 IR Adapter (or ZN036 with ZN030 ABPROG)

Abrites IR keys (TA13/TA14/TA15/TA21/TA22/TA52)

OBD Method

Connect AVDI to vehicle OBD

Connect ZN051 Distribution Box

Disconnect ESL and connect LIN to PIN 7 OBD (or specific pinout per chassis)

Open DAS Manager

Select "Read EIS Password"

Choose method: With Working Key or All Keys Lost

For AKL: Use fuse-relay method (if available) or direct extraction

Password extracted (0.5-1.8 seconds per attempt, average 500-1200 attempts)

Password saved automatically for future use

Click "Program/Emulate Key"

Select "Automatic Key Activation" (skips 24hr catchup procedure)

Place key in PROTAG IR slot

Program key (remote automatically programmed)

Reconnect ESL and test

Bench Method

Remove EIS module

Connect via ZN051 Distribution Box per chassis-specific pinout

Use IR adapter via AVDI or ABPROG

Read EIS data

Extract password

Program key via PROTAG

Option to program NEC via ABPROG if needed

Notes:

Most versatile tool - supports ALL FBS3 models including K-Line

No tokens required - included with license

Saved passwords database for faster repeat jobs

Supports module virginization, personalization, coding

Can program ESL emulators

Supports original Mercedes keys, Abrites keys, and BE keys

Internet connection required (3G minimum sufficient)

Advanced Diagnostics Smart Pro

Capability: Good FBS3 support with ADC260 Smart Programmer

Required Hardware

Smart Pro base unit

ADC260 Mercedes Smart Programmer

ADS2298 Mercedes Software Module

IR-compatible keys (POD-BENZ-4B1 recommended)

Method

Connect Smart Programmer to Smart Pro via USB

Connect Smart Pro to vehicle OBD

Turn ignition on

Navigate to Mercedes-Benz functions

Select All Keys Lost procedure

Tool reads EIS data via OBD or key emulator

Online password calculation (automatic)

Insert blank IR key into Smart Programmer IR slot

Follow guided programming steps

Program up to 8 keys total

Test key and remote functions

Notes:

Internet connection required

Original key not required (uses emulator)

Software free with ADC260 purchase (no tokens)

Relatively simple guided procedures

May have limited support for older K-Line models

Strong coverage for CAN-based FBS3 vehicles

XTOOL X100 Pad3 / Pad Elite

Capability: Good FBS3 coverage with KC501 adapter

Hardware Required

X100 Pad3 or Pad Elite

KC501 IR Key & Chip Programmer

M821 Mercedes AKL Adapter (optional, speeds up process)

EEPROM adapter (included)

OBD Method

Connect Pad3 to vehicle OBD

If using M821 adapter, connect via special cable

Disconnect ESL connector

Navigate to Immobilizer > Mercedes-Benz

Select chassis and All Keys Lost

Begin data reading (5-40 minutes)

Upload for password calculation

Connect KC501 to Pad3

Insert blank key in KC501 IR slot

Program IR data

Write NEC transponder via KC501

Reconnect ESL and test

Bench Method

Remove EIS module

Connect via M821 adapter if available (bench mode)

Read EIS data

Calculate password

Program key via KC501

Reinstall and test

Notes:

KC501 essential for IR key programming

M821 adapter significantly speeds up password extraction

EEPROM adapter useful for module backup

Good value proposition

2-year free updates

OBDSTAR X300 DP Plus / G3

Capability: Moderate FBS3 support, limited for older models

Hardware Required

X300 DP Plus or G3

P001 Programmer (for EEPROM work)

Toyota Key SIM (not applicable for Mercedes)

Method

Connect to vehicle OBD

Select Mercedes-Benz immobilizer functions

Check if specific chassis supported for AKL

For supported models:

Read EIS data via OBD

Calculate password (online)

Program key via guided procedure

For unsupported models:

Requires bench work with P001

EEPROM manipulation may be necessary

Notes:

Limited direct FBS3 AKL support compared to dedicated Mercedes tools

Better suited for FBS4 and newer

May work for key addition with working key

Check specific coverage before purchasing for FBS3 work

Consider more specialized tools for regular Mercedes work

Xhorse Key Tool Plus

Capability: Similar to VVDI MB, good FBS3 support

Hardware Required

Key Tool Plus tablet

Built-in IR port

Mercedes adapters

Optional: Multi-Prog for EEPROM work

Method

Connect to vehicle OBD

Use built-in IR port for key reading/programming

Follow Mercedes immobilizer procedures

Calculate password via Xhorse server

Program IR key via integrated IR reader

Write NEC chip via adapter

Test operation

Notes:

Good alternative to VVDI MB Tool

Built-in IR functionality convenient

Xhorse server calculates passwords

Suitable for shop use

COMMON CHALLENGES & SOLUTIONS

Password calculation fails or takes excessive time

Solution: Ensure stable power supply, verify ESL disconnected properly, check internet connection, try bench method

EIS won't communicate via OBD

Solution: Verify ESL disconnected, check K-Line connection if applicable, try bench method, check for damaged EIS

Key programs successfully but won't start engine

Solution: Check ESL reconnection, verify key activated properly, ensure automatic activation selected, may need 24hr catchup period

Remote functions not working after programming

Solution: Remote automatically programmed with key on most tools; test lock/unlock cycles; may need synchronization

ESL fault after key programming

Solution: Perform ESL synchronization procedure, check ESL communication, may require ESL reset or emulator

Tool shows "key already used" error

Solution: Choose different key position (1-8), or overwrite old key position after confirming with customer

W204/W207 bench work connection issues

Solution: Verify correct pinout for specific EIS type, ensure proper grounding, use G-BOX adapter for simplified connection

Older K-Line models (W203/W209/W211 early) OBD failures

Solution: Bench method strongly recommended, verify K-Line clip connected properly, ensure older tool software supports these models

PROFESSIONAL TIPS

Always verify FBS generation before starting (FBS3 vs FBS4) - check VIN or data card for SA codes 803/804

Make EEPROM backups before any modification work

Test battery voltage before starting - maintain 12.5V+ during procedure

ESL disconnection is critical for most OBD procedures - document connection before removal

Note which key positions are used (1-8) before programming - don't overwrite working keys accidentally

Some tools require working key for faster password extraction - always ask customer

Save extracted passwords - can reuse for that VIN without re-extraction

G-BOX/special adapters dramatically speed up common models (W204/W207/W212)

Internet connection mandatory for all tools - stable connection prevents failures

Programming time varies: OBD full procedure 20-60 min, Bench 15-40 min

Test both start function AND remote before delivering vehicle

Some vehicles require 24-hour "catchup" period unless automatic activation selected

ESL emulators available if steering lock failed - program via tool

KEY INFORMATION SUMMARY

Average Time

OBD with modern tools (G-BOX): 15-30 minutes

OBD without accelerators: 30-60 minutes

Bench work: 20-45 minutes

Password calculation: 5-30 minutes

Success Rates

W204/W207/W212 OBD: 95%+

Other CAN models OBD: 85-95%

K-Line models OBD: 70-85%

Bench method all models: 95%+

Common Tools for FBS3

VVDI MB Tool (excellent)

CGDI MB (excellent, best value)

Autel IM608 with G-BOX (excellent, fastest)

ABRITES AVDI (most comprehensive, professional)

Smart Pro with ADC260 (good)

Xhorse Key Tool Plus (good)

XTOOL X100 Pad3 with KC501 (good)

OBDSTAR X300 (limited FBS3 support)

Key Types: Original Mercedes NEC/BGA keys, Abrites IR keys, BE keys (aftermarket), Silca keys

SAFETY & LEGAL REMINDERS

Verify customer ownership before performing AKL

Document VIN and customer authorization

Disconnect vehicle battery when removing modules

Use ESD protection when handling electronic modules

Never force connections - verify pinouts from reliable sources

Test all functions before returning vehicle to customer

Inform customer about ESL status if emulator used

Keep backups of all original data

Follow local regulations regarding locksmith services

Mercedes-Benz FBS4 2013-2021 AKL

Mercedes FBS4 (DAS4) All Keys Lost Procedure Guide

2013-2018+

Fully Encrypted Online System

⚠️ CRITICAL INFORMATION - READ FIRST ⚠️

FBS4 All Keys Lost is EXTREMELY LIMITED for Aftermarket Tools

Unlike FBS2 and FBS3 systems, FBS4 uses fully encrypted online authorization requiring Mercedes-Benz server access. This fundamentally changes the AKL landscape:

PRIMARY AKL OPTIONS

Mercedes Dealer (Most Common)

Uses Xentry with authorized FBS4 access

Requires VIN registration with Mercedes server

Can program blank keys or order pre-programmed keys

Timeline: 3-20 days typical

Cost: $800-$1,500+ per key

Authorized Independent Workshops

Must have NASTF credentials (US)

Requires genuine Xentry Kit 4 subscription with FBS4 rights

Can program blank keys after VIN authorization

Very few shops have this access level

Pre-Programmed Keys from Mercedes Germany

In TRUE all keys lost, programmed keys ordered from Germersheim facility

Requires VIN release and extensive paperwork

Arrives pre-matched to vehicle

Most expensive option

WHAT AFTERMARKET TOOLS CANNOT DO

Standard locksmith tools (VVDI, CGDI, Autel, XTOOL, OBDSTAR, Smart Pro) CANNOT:

Program new keys in all keys lost situations

Calculate FBS4 passwords

Generate FBS4 key data without Mercedes server

Perform traditional AKL procedures

What they CAN do:

Read FBS4 key status (working/broken)

Disable key tracks

Add keys when working key present (limited support)

Clone/renew ECU modules (Autel, ABRITES only)

THE ABRITES SOLUTION (Partial)

ABRITES AVDI with MN032/MN034 specializes in:

FBS4 module replacement and personalization

Reading FBS4 data from modules

Setting modules to virgin state

ECU/TCU cloning and adaptation

AKL WITH WORKING KEY - Can adapt EIS when at least one key available

Does NOT provide true AKL without Mercedes server access

FBS4 SYSTEM OVERVIEW

Introduction Year

Mid-2013 for some models, 2015+ for most

Key Identification

8-digit code under battery cover (FBS3 has 7 digits)

SA Code 803 or 804 on data card (indicates FBS4)

Check VIN decoder for FBS generation

Compatible Vehicles (FBS4)

2013-2015 Transition Models:

W212 (E-Class April 2013+)

W166 (ML/GLE July 2013+, Code 803)

W207 (E-Coupe July 2013+, Code 804)

2014-2015 Models:

W218 (CLS Sept 2014+)

W117 (CLA Nov 2014+)

W156 (GLA Nov 2014+)

2015+ Models:

W205 (C-Class)

W213 (E-Class)

W222 (S-Class)

W217 (S-Coupe)

W231 (SL)

W172 (SLK/SLC April 2015+)

W177 (A-Class)

W247 (B-Class)

X253 (GLC)

X166 (GL/GLS)

W463 (G-Class with FBS4)

2018+ Models:

W206 (C-Class)

W223 (S-Class)

W214 (E-Class)

And newer generations

System Components

EIS/EZS: Electronic Ignition Switch (FBS4 generation)

ESL/ELV: Electronic Steering Lock

Key: Smart key with advanced encryption chip

All DAS Modules: ECU, TCU, ISM, ESM (all contain encrypted FBS4 data)

Critical Difference from FBS3

Fully encrypted online system

Rolling code encryption

Mercedes server authentication required

Keys cannot be programmed without server authorization

Timing protocols completely different from FBS3

DEALER/XENTRY METHOD (Primary AKL Solution)

Requirements

Genuine Xentry diagnostic system

Authorized FBS4 access (special security level)

Mercedes-Benz DaimlerCASE account with proper credentials

Stable internet connection for server communication

Vehicle ownership documentation

Valid customer identification

Procedure

VIN Registration (All Keys Lost)

Connect Xentry to vehicle via OBD

Register VIN with Mercedes server

System creates XSF (Expert Special Function) case

Authorization granted within 24-48 hours typical

Some cases require approval from Mercedes Germersheim

Key Programming with Authorization

Log into Xentry with authorized FBS4 account

Navigate to Immobilizer > Key Programming

Select "All Keys Lost" function

System communicates with Mercedes server

Follow guided procedure

Program blank key via encrypted handshake

Time: 30-90 minutes including server communication

Alternative: Pre-Programmed Key

In true AKL, dealer can order pre-programmed key

Extensive paperwork required

Parts manager and FBS4 technician authorization

Key ordered from Mercedes Germany

Arrives matched to VIN

Insert and start - no programming needed

Timeline: 5-20 business days

Important Notes

Working Key Addition: Much simpler, no XSF case required, still needs FBS4 access

Security: Mercedes tracks all FBS4 key programming events

Liability: Dealers often prefer AKL situations due to theft concerns

Cost Structure: Higher than FBS3 due to security requirements

ABRITES AVDI METHOD (Module Work & Limited Key Support)

Capability Overview

ABRITES is the only aftermarket solution with partial FBS4 support, but it is focused on module replacement, NOT traditional AKL.

What ABRITES Can Do

With MN032 (DAS Manager for FBS4):

Read FBS4 personalization data from modules

Set FBS4 modules to virgin state

Clone and personalize ECUs via OBD or bench

Replace TCU, ECU, ISM, DSM modules

Reflash FBS4 control modules

Read ESL/EIS data (when working key available)

With MN034 (FBS4 Personalization Expert):

Personalize virgin modules WITHOUT original data

Adapt second-hand FBS4 modules

ECU personalization: MED17, EDC17, CRD3 series

TCU personalization: VGS4-NAG2, VGSNAG3, VGS-FDCT

Work via OBD or bench with internal CAN

AKL Scenario with ABRITES

If ONE working key exists:

Connect AVDI to vehicle

Use MN032 to read EIS data with working key

Read FBS4 personalization data

Can prepare EIS for key addition

Program new key using existing key authentication

Limited compared to Xentry but possible

If NO keys (True AKL):

Cannot perform traditional AKL

Can only prepare modules for dealer programming

Can virginize/personalize replacement modules

Cannot generate key data without Mercedes server

Required Hardware

AVDI Plus or AVDI with active AMS

MN032 FBS4 Manager license

MN034 FBS4 Personalization Expert (for advanced work)

ZN051 ABRITES Distribution Box Set

ZN030 ABPROG (for some modules)

CB030 MD1/MG1 ECU cable (bench work)

CB403 Extended Cable Set (TCU work)

Typical Use Cases

ECU replacement with FBS4 data transfer

TCU adaptation (7G/8G/9G)

Module repair and personalization

Pre-dealer AKL preparation

Module virginization for service

Cost: MN032 + MN034 bundle €2,600+ (approximate)

OTHER TOOLS - LIMITED FBS4 CAPABILITY

VVDI MB Tool

FBS4 Support:

Can read FBS4 key status

Can disable FBS4 key tracks

CANNOT program new keys in AKL

CANNOT calculate FBS4 passwords

Focus remains on FBS3 and earlier

Function Path: Special Function > FBS4 Disable Key

Supported Models for Disable: W166, W205, W213, W218, W222, W246

Verdict: Not suitable for FBS4 AKL work

CGDI MB Prog

FBS4 Support:

Can read FBS4 keys (check if working or damaged)

Can read EIS FBS4 status

Can detect if FBS4 system present

CANNOT calculate passwords for FBS4

CANNOT program keys in AKL

Use: Diagnostic purposes only, check key/EIS health

Verdict: Not suitable for FBS4 AKL work

Autel IM608 / IM508

FBS4 Support (Recent Updates):

ECU Cloning: Can clone FBS4 ECUs with G-BOX3

Supported ECUs: MED17.7.2/7.3/7.5, CR43, CR60, CR61, CRD3

2015+ Mercedes C/E/S/ML/GL/GLC Series

Requires matching part numbers

Bench mode with G-BOX3

Key Programming:

Can add keys when working key present (limited models)

CANNOT perform true AKL for FBS4

Software clearly indicates FBS3 supported, FBS4 requires dealer

Typical Message: "4th generation FBS4 not supported - dealer only"

Verdict: Useful for ECU work, NOT for FBS4 AKL

XTOOL X100 Pad3 / Pad Elite

FBS4 Support:

Very limited or no direct FBS4 support

Software may detect FBS4 and indicate dealer required

Focus on FBS3 and earlier systems

Verdict: Not suitable for FBS4 work

OBDSTAR X300 DP Plus / G3

FBS4 Support:

Minimal to no FBS4 support

Tool designed for other manufacturers primarily

Cannot handle FBS4 AKL

Verdict: Not suitable for FBS4 work

Smart Pro (Advanced Diagnostics)

FBS4 Support:

Currently no FBS4 support

ADC260 Mercedes programmer designed for FBS3

May detect FBS4 and indicate unsupported

Verdict: Not suitable for FBS4 work

Xhorse Key Tool Plus

FBS4 Support:

Can detect FBS4 system

Similar to VVDI - read only capabilities

Cannot program FBS4 AKL

Verdict: Not suitable for FBS4 work

ALTERNATIVE SOLUTIONS

1. Third-Party Xentry Services (Remote)

How it Works:

Some companies offer remote Xentry access

Customer provides VIN and vehicle data

Service uses authorized Xentry account

Programs key via TeamViewer/remote connection

Vehicle must be at shop with VCI connected

Considerations:

Verify legitimacy and reputation

Understand liability and warranty

More expensive than direct dealer but may be faster

Requires stable internet and proper VCI

2. Mobile Dealer Service

How it Works:

Some dealers offer mobile FBS4 service

Technician comes to vehicle location

Programs key on-site with portable Xentry

Charges premium for convenience

Best For:

Vehicles that cannot be moved

Remote locations

Emergency situations

3. EIS/Module Replacement

When AKL Not Possible:

If EIS damaged or completely locked

Replace complete EIS/ESL set with programmed unit

Dealer can supply pre-matched set

Most expensive option ($2,000-$4,000+)

Guaranteed solution when all else fails

IDENTIFYING FBS4 BEFORE STARTING

Method 1: Check Key

Remove battery cover

7-digit code = FBS3

8-digit code = FBS4

Method 2: Check VIN/Data Card

Look for SA code 803 or 804

Use online VIN decoder

Check Mercedes VEDOC if available

Method 3: Connect Diagnostic Tool

Most tools will auto-detect FBS generation

Look for explicit "FBS4" or "DAS4" indication

Software will typically indicate if supported

Method 4: Model Year Reference

2013 and earlier: Likely FBS3

2014-2015: Transition period - verify

2015 and later: Almost certainly FBS4

PROFESSIONAL RECOMMENDATIONS

For Locksmiths

Screen FBS4 Jobs Early

Check FBS generation before quoting

Set clear expectations with customer

Explain dealer requirement upfront

Build Dealer Relationships

Partner with dealer for FBS4 work

Offer to handle FBS3 and earlier

Provide pre/post dealer services

Invest in ABRITES for Module Work

If doing regular Mercedes work

Module replacement is profitable

Can handle pre-dealer preparation

Consider Xentry Investment

Requires NASTF membership (US)

Expensive initial setup ($10,000+)

Ongoing subscription costs

Only worthwhile for high-volume shops

For Customers

Contact Dealer First

Fastest and most reliable for FBS4

Get quote including all costs

Ask about timeline

Check Independent Shops

Ask specifically about FBS4 capability

Verify they have proper Xentry access

May offer better pricing than dealer

Consider Additional Key Purchase

When adding spare key, order 2

Prevents future AKL situation

Much cheaper than AKL solution

Document Everything

Keep all key codes and documentation

Store spare key in secure location

Use key tracking tags (Airtag, etc.)

COMMON SCENARIOS & SOLUTIONS

Scenario 1: Lost Only Key (True AKL)

Solution Path:

Contact Mercedes dealer

Provide ownership documents and ID

Dealer registers VIN with Mercedes server

Order pre-programmed key OR program blank key with Xentry

Wait 5-20 days for pre-programmed key

Timeline: 1-3 weeks, Cost: $1,000-$1,500

Scenario 2: Need Additional Key (Have Working Key)

Solution Path:

Can be done at any dealer with FBS4 access

Much simpler - no XSF case needed

Blank key + programming typically same visit

Timeline: Same day to 1 week

Cost: $400-$800

Scenario 3: Damaged EIS/ESL Module

Solution Path:

Assess if module repairable

If not, replacement EIS/ESL set required

Must be programmed to VIN by dealer

Complete system replacement expensive

Consider ABRITES for module adaptation if available

Scenario 4: Key Won't Program - "Authorization Failed"

Possible Causes:

Insufficient access level in Xentry

VIN not properly registered

System already has XSF case pending

Vehicle flagged as stolen

Solution:

Contact Mercedes technical support

Verify VIN release status

May require escalation to Germersheim

TECHNICAL DETAILS

FBS4 Encryption

Uses advanced rolling code algorithm

Each key use generates new code

Server validates every programming attempt

Cannot be bypassed or calculated offline

Timing protocols precisely calibrated

Key Memory

Supports up to 8 key positions (like FBS3)

Each key has unique encrypted ID

System logs all key programming events

Can disable lost/stolen keys remotely

Server Requirements

Must communicate with DaimlerCASE server

Real-time authorization checks

Audit trail for all operations

Regional security differences

SUMMARY: FBS4 AKL REALITY

Bottom Line for Locksmiths

FBS4 represents Mercedes-Benz's commitment to preventing unauthorized key programming. The encryption and online authorization requirements effectively eliminate traditional aftermarket AKL solutions.

Your Options

Refer to dealer (most common)

Partner with authorized shop (if available)

Invest in genuine Xentry (high-volume only)

Use ABRITES for module work (not direct AKL)

What This Means

FBS4 AKL is 95% dealer territory

Focus your Mercedes work on FBS3 and earlier

Build relationships for FBS4 referrals

Adjust pricing expectations accordingly

Future Outlook

No indication Mercedes will open FBS4 to aftermarket

Security continues to tighten with each generation

FBS5/DAS5 on newest models even more restricted

Dealer dependency likely to continue

IMPORTANT DISCLAIMERS

This guide reflects current capabilities as of 2025

FBS4 support continues to evolve slowly

Some regional differences may apply

Always verify current tool capabilities before starting work

Dealer option remains most reliable for FBS4 AKL

Attempting unauthorized FBS4 key programming may trigger security locks

Mercedes tracks all FBS4 programming attempts

Note: This guide differs significantly from FBS2/FBS3 guides because FBS4 fundamentally changed the key programming landscape. The encryption and online authorization requirements make traditional locksmith AKL procedures impossible without Mercedes server access. This is by design and unlikely to change.

Mercedes-Benz Secure Gateway (SGW) 2021+ Information

Mercedes-Benz Secure Gateway (SGW) Guide

2021+

Impact on Locksmith Operations and Key Programming

CRITICAL INFORMATION - READ FIRST

What SGW Is: A network security firewall module that restricts OBD diagnostic access

What SGW Is NOT: A new immobilizer system (vehicles still use FBS4 immobilizer)

Affected Vehicles: Select 2021+ Mercedes-Benz models

Impact on Locksmiths: Adds authentication requirement BEFORE you can access immobilizer functions

Reality Check: SGW creates an additional layer of complexity on top of already-difficult FBS4 key programming. You must bypass SGW authentication first, then still face FBS4 AKL challenges.

Understanding Secure Gateway (SGW)

What is SGW?

SGW functions like a computer firewall for the vehicle's electronic network:

Purpose: Protects vehicle systems from unauthorized access and cyber attacks

Function: Requires tool authentication before allowing diagnostic communication

Location: Sits between OBD port and vehicle control modules

Effect: Blocks bi-directional controls, coding, programming, and special functions

SGW vs Immobilizer System

Critical Distinction:

Feature Secure Gateway (SGW) FBS4 Immobilizer

Purpose Network access control Anti-theft key authorization

Function Diagnostic authentication Key programming/validation

Layer Communication firewall Security authorization

Introduced 2021+ select models 2015+

Bypass Method AutoAuth registration Dealer authorization (for AKL)

Both systems are present on 2021+ vehicles - you must navigate SGW to access diagnostics, then still face FBS4 key programming restrictions.

SGW-Equipped Mercedes Models

Confirmed SGW Models (2021+)

W223 - S-Class (2021+)

All variants including long wheelbase

Maybach S-Class included

W206 - C-Class (2022+)

C200, C300, C43 AMG, C63 AMG

All body styles

W254 - GLC (2023+)

GLC 300, GLC 43 AMG, GLC 63 AMG

Coupe variants included

W236 - CLE (2024+)

CLE Coupe

CLE Cabriolet

EV Models:

W294 - EQE Sedan (2023+)

V295 - EQE SUV (2023+)

V296 - EQS SUV (2022+)

Models WITHOUT SGW (Pre-2021)

W213 E-Class (2016-2020) - FBS4 only

W205 C-Class (2015-2021) - FBS4 only

W222 S-Class (2014-2020) - FBS4 only

W166/W167 GLE (2015-2020) - FBS4 only

Note: Some 2021 models may not have SGW. Always verify before assuming SGW is present.

How SGW Impacts Locksmith Work

What Functions Are Blocked?

Without SGW Authentication:

✅ Read DTCs (Diagnostic Trouble Codes)

✅ Basic data stream viewing

✅ Limited diagnostic information

❌ Clear DTCs

❌ Bi-directional controls

❌ Active tests

❌ Coding and adaptations

❌ Module programming

❌ SCN coding (online coding)

❌ Immobilizer functions (key programming)

❌ Special functions

❌ Service resets

With SGW Authentication:

✅ Full diagnostic access

✅ All functions unlocked

⚠️ But FBS4 key programming still requires dealer authorization

The Double Challenge on 2021+ Vehicles

For Key Programming on SGW-Equipped Vehicles:

Step 1: Bypass SGW authentication (register tool with AutoAuth)

Step 2: Access immobilizer functions

Step 3: Still face FBS4 AKL limitations (requires dealer authorization - see FBS4 guide)

Critical Reality: SGW authentication only gets you TO the immobilizer functions. It does NOT solve the FBS4 key programming challenge. You still cannot perform AKL on FBS4 systems without dealer authorization or specialized solutions like ABRITES.

SGW Authentication Methods

Method 1: AutoAuth Registration (Primary Method)

What is AutoAuth?

Third-party authentication service approved by Mercedes-Benz

Acts as intermediary between manufacturers and aftermarket tool companies

Provides time-limited authentication tokens

Supported Tool Brands:

Autel (all compatible models)

Launch (select X431 models)

Topdon (select models)

Snap-on (compatible models)

Registration Process

Step 1: Create AutoAuth Account

Visit AutoAuth website via tablet or computer browser

Register shop information

Provide business credentials

Submit documentation

Step 2: Select Subscription Plan

Individual Plan:

$50/year for one vehicle brand (Mercedes)

Covers 1 tool

Suitable for small operations

Plus Plan:

$200/year for one brand

Up to 14 users and 15 tools

Additional users: $20/user/year

Enterprise Plan:

Unlimited users and tools

Contact AutoAuth for pricing

Best for large operations

Step 3: Register Tools

Add tool serial numbers to account

Up to 100 tools can be registered (depending on plan)

Serial number location: back of tablet or Settings > About

Step 4: Activate on Tablet

Ensure active tool software subscription

Connect tablet to internet

Software update will push SGW access

Verify activation in tool settings

Method 2: Manufacturer Direct Authorization (Advanced)

For Dealer-Level Access:

Requires business relationship with Mercedes-Benz

LSID (Locksmith Security ID) helpful but not always sufficient

Must meet manufacturer security requirements

More extensive vetting process

Not practical for most independent locksmiths.

Tool-Specific SGW Support

Autel IM608/IM608 Pro & IM508/IM508S

SGW Access: YES (via AutoAuth)

Capabilities:

Full diagnostic access after AutoAuth registration

Can access immobilizer functions

Can clear codes, perform adaptations

Cannot perform FBS4 AKL (same limitation as pre-SGW models)

Requirements:

Active TCP software subscription

AutoAuth account and registration

Internet connection during authentication

Setup Process:

Maintain active Autel subscription

Register with AutoAuth ($50/year Mercedes)

Add tablet serial number to AutoAuth account

Connect tablet to Wi-Fi

Software will automatically enable SGW access

Verify by attempting to access SGW-equipped vehicle

Important: IM608/IM608 Pro support Mercedes SGW. IM508/IM508S do NOT support Mercedes SGW as of current software versions. Check latest compatibility.

Autel Ultra Series (Ultra, MS909, MS919)

SGW Access: YES (via AutoAuth)

Capabilities:

Best Autel solution for Mercedes SGW

Supports SCN coding (online coding)

Full diagnostic and programming access

Still limited on FBS4 AKL without dealer authorization

Requirements:

Same AutoAuth registration process

Active software subscription

Premium features may require additional licensing

Launch X431 (PAD V, PAD VII, Pro5 Elite)

SGW Access: YES (via Launch SGW Package)

Capabilities:

Requires separate European SGW license purchase

Unlocks gateway on Mercedes 2021+ models

Full diagnostic functions

FBS4 AKL still not achievable

Requirements:

Purchase Launch European SGW Function License

Cannot purchase individual Mercedes license (must buy package)

Compatible devices: PAD V, PAD VII, PAD V Elite, PAD VII Elite, Pro5 Smartlink

Setup Process:

Purchase European SGW package from Launch

Contact sales representative for activation

License binds to tool serial number

Activation takes 2-4 business days

Verify activation with test vehicle

Cost Structure:

Package-based (cannot buy Mercedes only)

Annual renewal required

Pricing varies by region/distributor

ABRITES AVDI

SGW Access: LIMITED

Current Status:

No confirmed AutoAuth partnership for Mercedes SGW

May require alternative access methods

Primarily focuses on module adaptation (not blocked by SGW)

FBS4 Manager works via direct module connection (bypasses SGW)

Workaround Capabilities:

Bench work bypasses SGW entirely (modules removed from vehicle)

Direct CAN connection to modules

Does not rely on OBD gateway access

Limitation: If you need OBD-based diagnostics on SGW vehicles, ABRITES may not be the best tool. For bench work and module replacement, ABRITES remains the strongest aftermarket option.

VVDI2 / Key Tool Plus (Xhorse)

SGW Access: NO

Current Status:

No AutoAuth partnership

No Mercedes SGW support

Cannot access SGW-protected vehicles via OBD

Impact on Locksmiths:

VVDI2 cannot work with 2021+ SGW-equipped Mercedes vehicles

Even if SGW access existed, still cannot do FBS4 AKL

Limited to pre-2021 models for Mercedes work

Alternative: Focus on FBS3 vehicles (2007-2015) where VVDI2 excels

OBDSTAR X300 DP Plus / G3

SGW Access: NO

Current Status:

No confirmed Mercedes SGW support

No AutoAuth partnership announced

Cannot access SGW-protected functions

Impact: Not viable for 2021+ Mercedes SGW vehicles

XTOOL X100 Pad3 / Pad Elite

SGW Access: NO

Current Status:

No Mercedes SGW support confirmed

Limited Mercedes functionality overall

Not recommended for professional Mercedes work

Smart Pro (Advanced Diagnostics)

SGW Access: NO

Current Status:

Primarily focused on other vehicle makes

No Mercedes SGW capability

Not designed for Mercedes-Benz applications

Practical Workflow for SGW Vehicles

Pre-Work Assessment

Step 1: Identify Vehicle Generation

Check model year and chassis code

Confirm if SGW-equipped (2021+ select models)

Verify tool has SGW access capability

Step 2: Tool Verification

Confirm AutoAuth registration active

Verify software subscription current

Check internet connectivity available

Step 3: Understand Job Scope

Diagnostics only? (SGW access sufficient)

Key programming? (FBS4 limitations still apply)

Module coding? (May require SCN online coding)

Working with SGW-Equipped Vehicles

Diagnostic Jobs

Connect Tool

Plug into OBD port

Ensure stable 12V+ battery voltage

Connect to Wi-Fi if needed

Authenticate

Tool will automatically authenticate via AutoAuth

May see authentication progress screen

Wait for confirmation (typically 5-30 seconds)

Proceed with Diagnostics

Full access to all diagnostic functions

Can clear codes, perform active tests

Access special functions

Key Programming Jobs

Authenticate SGW First

Complete AutoAuth process

Verify access to immobilizer functions

Assess FBS4 Capability

Add key with working key: Possible with some tools

All Keys Lost: NOT possible without dealer authorization

Refer to FBS4 guide for detailed limitations

Set Customer Expectations

Explain double-layer security (SGW + FBS4)

Be honest about AKL impossibility

Provide dealer referral or partnership option

Troubleshooting SGW Access Issues

"Authentication Failed" Error

Possible Causes:

AutoAuth subscription expired

Tool not registered in AutoAuth account

Internet connection lost

Serial number entered incorrectly

Solutions:

Verify AutoAuth account active and paid

Check tool serial number in account

Confirm internet connectivity

Re-enter serial number if necessary

Contact AutoAuth support for verification

"Insufficient User Rights" Message

Possible Causes:

User not added to registered shop

Tool subscription expired

Software not updated with SGW capability

Solutions:

Shop owner must invite user to account

Renew tool software subscription

Update tool to latest software version

Verify tool model supports Mercedes SGW

Limited Functions Still Blocked

Possible Causes:

Partial SGW authentication

Function requires additional authorization (SCN coding)

FBS4 limitation (not SGW issue)

Solutions:

Verify full SGW access granted

SCN coding may require dealer-level access

Understand difference between SGW access and FBS4 limitations

Some functions will never be available aftermarket

Tool Shows "Not Supported"

Possible Causes:

Tool model doesn't support Mercedes SGW

Software version too old

Wrong AutoAuth configuration

Solutions:

Verify tool is on compatible list

Update to latest software

Check tool specifications with manufacturer

May need to upgrade to compatible model

Cost Analysis for Locksmiths

Annual Operating Costs (SGW Access)

Basic Setup (1-2 tools):

AutoAuth Individual: $50/year

Tool subscription: $500-1,000/year (varies by brand)

Total: ~$550-1,050/year

Small Shop (3-15 tools):

AutoAuth Plus: $200/year

Tool subscriptions: $1,500-15,000/year

Total: ~$1,700-15,200/year

Large Operation (15+ tools):

AutoAuth Enterprise: Custom pricing

Tool subscriptions: $15,000+/year

Total: Contact for pricing

Return on Investment Considerations

What You Gain:

Diagnostic access to 2021+ Mercedes vehicles

Ability to perform service functions

Coding and adaptation capabilities

Professional credibility

What You DON'T Gain:

FBS4 AKL capability (still dealer-dependent)

Bypass of Mercedes security protocols

Standalone key programming solution

Business Reality:

SGW access is necessary for diagnostic work on new Mercedes

Key programming remains challenging regardless of SGW

Best ROI if already servicing Mercedes vehicles extensively

Consider partnering with dealer for key work

Professional Recommendations

For Locksmiths Considering SGW Investment

Invest If:

Already servicing Mercedes vehicles regularly

Customer base includes 2021+ models

Offering diagnostic and coding services

Building long-term Mercedes capability

Don't Invest If:

Occasional Mercedes work only

Focusing exclusively on key programming

Limited budget for ongoing subscriptions

No plan to handle FBS4 challenges

Best Practices

Subscription Management:

Set calendar reminders for renewal dates

Budget for annual costs upfront

Keep tool software updated

Maintain AutoAuth account credentials securely

Customer Communication:

Explain SGW as separate from immobilizer

Be clear about capabilities and limitations

Don't promise FBS4 AKL without dealer access

Provide realistic timelines

Tool Selection:

Autel Ultra series for comprehensive Mercedes work

Launch X431 for multi-brand shops

Consider total cost of ownership (subscription + SGW + updates)

Verify SGW support before purchasing

Strategic Partnerships

Dealer Relationships:

Essential for FBS4 key programming

Can handle SGW jobs and refer key work

Build mutual referral arrangement

Specialized Locksmiths:

Partner with FBS4-capable shops

Share jobs where SGW access needed

Combine strengths for complete service

Future Outlook

Industry Trends

Short Term (2025-2026):

More Mercedes models will add SGW

AutoAuth likely remains primary access method

FBS4 restrictions will continue

Medium Term (2027-2028):

SGW may become standard across all models

Additional manufacturers adopting similar systems

Aftermarket tools must adapt or lose access

Long Term (2029+):

Gateway security will become industry standard

Subscription-based tool access normalizes

Independent shops must invest to remain relevant

Preparing for the Future

For Locksmiths:

Accept subscription-based access as new reality

Budget for ongoing authentication costs

Diversify capabilities beyond key programming

Build diagnostic and coding expertise

Establish dealer partnerships for complex work

For Tool Buyers:

Verify SGW support before purchase

Consider total cost over 3-5 years

Choose brands with manufacturer partnerships

Plan for annual subscription expenses

Common Misconceptions

Myth vs Reality

Myth: "SGW is a new immobilizer system"

Reality: SGW is a network firewall. Immobilizer is still FBS4.

Myth: "Bypassing SGW allows key programming"

Reality: SGW access only enables diagnostics. FBS4 AKL still requires dealer authorization.

Myth: "All 2021+ Mercedes have SGW"

Reality: Only select models (W223, W206, W254, etc.) have SGW.

Myth: "SGW can be permanently bypassed"

Reality: Authentication required for each session. No permanent bypass.

Myth: "One-time SGW purchase covers forever"

Reality: Annual subscriptions required. Cost never ends.

Myth: "VVDI2 can access SGW with update"

Reality: No AutoAuth partnership = no SGW access.

Myth: "SGW only affects dealers"

Reality: Affects all aftermarket tools without authentication.

Quick Reference Guide

SGW Status by Vehicle

Model Years SGW Status Immobilizer

W223 S-Class 2021+ YES FBS4

W206 C-Class 2022+ YES FBS4

W254 GLC 2023+ YES FBS4

W236 CLE 2024+ YES FBS4

EQE/EQS EVs 2022+ YES FBS4

W213 E-Class 2016-2023 NO (until 2021FL) FBS4

W205 C-Class 2015-2021 NO FBS4

W222 S-Class 2014-2020 NO FBS4

Tool SGW Support Summary

Tool SGW Access Method Cost

Autel Ultra/MS909 YES AutoAuth $50/yr

Autel IM608 Pro YES AutoAuth $50/yr

Launch X431 PAD VII YES SGW Package Varies

ABRITES AVDI NO/Limited Bench work N/A

VVDI2 NO N/A N/A

OBDSTAR NO N/A N/A

XTOOL NO N/A N/A

Summary

Key Takeaways

SGW is NOT a new immobilizer - it's a network security layer that sits in front of all vehicle systems

2021+ select Mercedes models have SGW - not all vehicles are affected

Authentication required - AutoAuth registration ($50/year) necessary for aftermarket tools

Double challenge on SGW vehicles - Must authenticate SGW AND still face FBS4 limitations for key programming

Tool support varies - Autel and Launch have SGW access; VVDI2, OBDSTAR, XTOOL do not

Ongoing costs - Annual subscriptions required, plan budget accordingly

Diagnostics vs Key Programming - SGW access helps diagnostics, doesn't solve FBS4 AKL issue

Dealer partnerships essential - For key programming on FBS4 vehicles with or without SGW

Bottom Line for Locksmiths

SGW adds complexity and cost but is manageable with proper tool investment and AutoAuth registration. However, it does NOT solve the fundamental FBS4 key programming challenge. For comprehensive Mercedes service on 2021+ vehicles, you need:

SGW authentication (for diagnostic access)

FBS4 capability (for key programming - typically dealer-dependent)

Ongoing subscription budget

Professional partnerships

Plan accordingly and set realistic customer expectations.