MB 8G VGS3-FDCT / 9G VGS-NAG3 Cable for PCM Flash
The MB 8G VGS3-FDCT / 9G VGS-NAG3 Cable is a professional-grade connection harness specifically engineered for the PCM Flash tuning system. Designed for Mercedes-Benz vehicles, this adapter allows a direct and stable link between the vehicle's Transmission Control Unit (TCU / VGS) and the PCM Flash hardware. It provides a safe, non-invasive method for reading and writing transmission software without the need to cut factory wiring or disassemble the TCU casing. This cable is an essential tool for automotive technicians and tuning specialists working on modern Mercedes-Benz 8-speed and 9-speed automatic transmissions.
Function
- TCU Reading/Writing: Enables reliable reading and writing of Flash and EEPROM memory in the VGS3-FDCT and VGS-NAG3 transmission control units via PCM Flash.
- TCU Cloning: Facilitates the cloning of transmission data when replacing a faulty TCU with a used or new unit.
- Transmission Tuning: Allows modification of shift maps, torque limits, and shift speeds for performance optimization.
- Software Repair: Capable of recovering and programming bricked or corrupted VGS modules.
- Plug-and-Play Connection: Direct plug-in interface to the TCU harness, ensuring a secure connection for both OBD and Bench/Boot mode operations.
Support Car Models
This cable supports Mercedes-Benz vehicles equipped with the 8G-Tronic (VGS3-FDCT) and 9G-Tronic (VGS-NAG3) automatic transmissions, primarily covering models from 2013 onwards. Supported series include, but are not limited to:
- A-Class: W177 (A200, A220, A250, A35, A45)
- B-Class: W247 (B200, B220, B250)
- C-Class: W205, W206 (C200, C300, C43, C63)
- E-Class: W213, W214, S213 (E200, E300, E43, E53, E63)
- S-Class: W222, W223 (S350, S450, S500, S560, S63, S65)
- GLC-Class: X253, X254 (GLC200, GLC300, GLC43, GLC63)
- GLE-Class: W166, W167 (GLE300, GLE350, GLE450, GLE53, GLE63)
- GLS-Class: X166, X167 (GLS450, GLS550, GLS63)
- G-Class: W463 (G350, G500, G550, G63)
- CLA-Class: C118, C117 (CLA200, CLA250, CLA35, CLA45)
- GLA-Class: H247, X156 (GLA200, GLA250, GLA35, GLA45)
- GT/GT 4-Door: C190, X290
Note: Compatibility depends on the specific VGS transmission controller fitted to the vehicle. Please verify the TCU part number before operation.





