Why Can't the Mercedes-Benz Car Shift Gears After Starting?
2 Answers
Reasons why the car cannot shift gears after starting: There is a fault inside the gear lever assembly, the gears inside the gear lever are worn out, causing the gear lever to jam, making it very difficult to pull back and forth; the P-gear locking solenoid valve in the gearshift lever has malfunctioned, or the brake switch is faulty; the clutch does not fully disengage, which may be caused by the failure of the clutch disc and the clutch pressure plate, usually requiring the replacement of the clutch three-piece set; the battery is leaking, and insufficient power prevents starting. Identifying the cause of the fault: If a Mercedes-Benz car cannot start, the first step is to identify the cause of the fault. For diagnosing faults such as the engine failing to start, the battery should be checked first. It is essential to determine whether the engine's failure to start is due to insufficient battery power. Then, check the starting system. First, inspect the circuit in the engine starting system. From the most basic composition, the circuit of the starting system generally includes the following fundamental parts: the battery, the starter motor, and the cables connecting these components. Important parts of the starting system: Of course, in addition to these, the ignition switch, the starter relay or solenoid coil, and the vehicle anti-theft system are also important components of the starting system.
I've encountered the issue of not being able to shift gears after starting my Mercedes, mainly caused by not pressing the brake pedal firmly enough. Most Mercedes models use electronic gear shift systems, which require you to press the brake pedal firmly after starting to unlock the gear shift. If you still can't shift after pressing the brake, it might be due to a dead key fob battery or incorrect key position, preventing the system from recognizing and allowing operation. Brake sensor malfunctions are also common, triggering the gear lock protection mechanism. Low battery voltage can cause system instability, affecting smooth gear shifting. Additionally, insufficient transmission fluid or minor control module issues should be checked. It's recommended to first try restarting the engine; if that doesn't work, check if the brake lights are functioning. Avoid forcing the gear lever to prevent internal damage, and for safety, it's best to visit a 4S shop promptly for a comprehensive diagnosis to prevent accidents while driving.
