Mercedes-Benz Coding / Activation / Repair - FDCT Transmission Error P051300 (FBS3/FBS4, 7G-DCT)

Is your customer experiencing problems with their Mercedes no longer starting and the error code P051300 – "Start permission not granted" – is stored in the memory? This issue frequently affects the 7G-DCT FDCT dual-clutch transmissions in the following series:
✅ A-Class W176 / W177
✅ CLA W117 / W118
✅ GLA W156 / W157
✅ B-Class W246 / W247

The cause is usually a sudden drop in voltage , which damages the control unit data - the result: no more start enable .

Previously, in such cases, only replacing the entire control unit was possible. With our repair service, you can continue to use the existing control unit and have it permanently repaired – without a new part, without coding, and without any modifications to the vehicle .

🔧 What is being done?

• Repair of the drive enable function in the transmission control unit

• Troubleshooting for P051300 – Start clearance not granted

• Compatible with FBS3 and FBS4 systems

• Only for 7G-DCT transmissions (not suitable for 8G)

📦 Process & Shipping:

1. This product is intended exclusively for workshops and resellers

2. After ordering, please send us the removed transmission control unit

3. After successful repair, we will send it back to you immediately

4. Reinstallation is plug & play – no further coding required

⚠️ Important information:

• A repair is only possible if no previous repair attempts or SCN coding have been performed

• Non-functional, manipulated or empty control units (e.g. due to short circuit, water damage, etc.) cannot be repaired

• No refund is possible after the repair has been carried out

Compatible vehicles:
Mercedes-Benz A-Class, CLA, GLA, B-Class with 7-speed dual-clutch transmission (7G-DCT), FBS3 or FBS4

Legal notice:
This offer is exclusively for specialist companies with technical expertise. Shipping the control unit is at your own risk. Please check beforehand that the control unit is physically undamaged and has not been subject to any software modifications.

Our offers are not affiliated with Dr. Ing. hc F. Porsche AG, VW AG, Audi AG, Seat SA, Skoda as, BMW AG, MINI AG, Apple Inc., Mercedes-Benz Group AG, Jaguar Land Rover Limited, or other vehicle manufacturers. Brand names are mentioned purely for the purpose of comparability with other offers and for easier identification. This is not an official offer from the manufacturers mentioned.