Why is there no response when shifting gears in a Mercedes-Benz?

[NoahMarie]

There is no response when shifting gears in a Mercedes-Benz, which could be due to two main reasons: first, the brake switch is damaged; second, there is a malfunction in the internal mechanism of the gear shift assembly. Identifying the source of the fault: Turn the ignition switch (EIS) to the ON position or start the engine. Place the palm of your hand on the head of the gear shift lever and press the brake pedal. If there is no vibration felt in the palm after pressing the brake pedal or pressing it multiple times, it indicates that the brake switch is damaged and needs to be replaced. If vibration is felt in the palm every time the brake pedal is pressed, it means the brake switch is functioning properly, and the issue lies in the internal mechanical components of the gear shift assembly. Solution: Replace the gear shift mechanical assembly. Since the plastic clip that locks the gear shift lever is not available as a separate part, the entire gear shift mechanical assembly must be replaced. This repair method is costly. Additionally, after replacing the gear shift mechanical assembly, because the Electronic Shift Module (ESM) is integrated within it, the Mercedes-Benz specialized diagnostic tool must be used for coding. Otherwise, even after replacing the assembly, the gears cannot be shifted. Repair shops and service centers with the specialized diagnostic tool typically adopt this repair method.