Top Tools to Renew Mercedes VGS4 NAG2 Gearbox TCU

 To renew or virginize a Mercedes-Benz FBS4 VGS4 NAG2 gearbox (specifically VGS4-0-NAG2 or VGS4-500-NAG2, used in 4th generation (4-4) 7-speed transmissions), you need specialized tools to reset, erase, clone or reprogram the Transmission Control Unit (TCU). Based on available information, here are the primary tools recommended:

1.Launch X431 ECU & TCU Programmer:

Launch X-prog3 PC software can do VGS4NAG2 in boot.

Functionality: 

Supports resetting/virginizing the VGS4 NAG2 gearbox by reading, writing, personalizing, and erasing TCU data. The process involves reading EEPROM data from the original TCU in BENCH mode, renew/virgin a used TCU in both BENCH and BOOT modes, and writing the original data to the used TCU for personalization.

Supported VSG4TCM type: VGS4-0-NAG2, VGS4-500-NAG2

Supported Devices:

Launch X431 ECU/TCU Programmer, X-Prog3 with PC Adapter

NOTE: Only X-prog3 PC software can renew VGS4 NAG2. Launch X431 tablets don’t have VGS4 functionality.

 

Software Requirement: V10.40 or later

Process:

Connect to the TCU, read original data, erase the used TCU, personalize with original EEPROM data, and program/adapt using MB Star Diagnosis.

Check Launch X431 VGS4 Gearbox Renew Process.

Advantages:

Allows reuse of second-hand TCUs, simplifies replacement without complex disassembly, and supports both BENCH and BOOT modes.

 

 

2.OBDSTAR X300 Classic G3/DC706:

OBDStar just released an update for the DC706 and the G3 to be able to do this.

Functionality:

Enables virginizing and data transfer for VGS4-0-NAG2 TCUs, particularly for used units. It supports reading/writing data in BENCH or OBD mode for original TCUs and JTAG mode for used TCUs, requiring drilling for access.

Supported Models:

Common in Mercedes S-Class W222, E-Class W205, and GLC 2166 (2014 onwards).

Supported VGS4 Type: VGS4-0-NAG2

Required Tools: OBDSTAR X300 Classic G3 (with ECU Flasher license) or DC706 Full, MP001 Programmer, C4-07 Adapter Kit, TCM-012 Benz VGS Adapter, power supply, and drilling tools.

Process:

Use the C4-07 kit to drill and access the TCU, read original data, erase the used TCU (including VIN), and transfer data. After virginizing, adapt or program the TCU to the vehicle using an MB Star diagnostic scanner.

Check how to renew Benz VGS4 gearbox with OBDSTAR

How to Virgin Mercedes Used VGS4 NAG2 Gearbox TCU with OBDSTAR G3 and C4-07 Kit?

Advantages: Solder-free virginizing in JTAG mode and precise drilling with the C4-07 kit.

 

3. AVDI Abrites Programmer

 

Abrites ABPROG Programmer with MN035 License:

Functionality:

Virgin VGS4 NAG2 gearbox TCU and adapt with abrites in boot. 

 

Supported VGS4 TCU Type: VGS4-0-NAG2

 

Process:

Read FBS4 data from VGS4-NAG2 modules with the help of ABPROG
Set VGS4-NAG2 modules to virgin state using ABPROG
Write FBS4 personalization data to the TCU using ABPROG. Writing is also available via the internal CAN bus for owners of MN034.

 

Advantages:100% will work on FBS4 DME and EGS.

Limitation:

Requires the ABPROG programmer and MN035 license, AVDI with active annual subscription, and the MN035 license are required to use the full functionality of this set. which is way more expensive than Launch or OBDSTAR tools.

AVDI also has a solder free set for VGS4. The new SET088 – solder-free set of tools for working with VGS4-0 NAG2 transmission control units in Mercedes-Benz cars.

 

As for others, Autel, CGDI, mms Flex etc only erase VGS up until FBS3.