Why can't the Mercedes-Benz S350 shift gears?

[DelHailey]

The following are the specific reasons why the Mercedes-Benz S350 cannot shift gears: 1. P-gear lock solenoid valve failure: To prevent the vehicle from accidentally shifting into other gears when starting, there is a P-gear solenoid valve, which requires a signal from the brake pedal to release. These two components are interrelated, and if either one fails, it will prevent the gear lever from being pushed out of P-gear into other gears. 2. Internal failure of the gear lever assembly: Wear of the gears inside the gear lever causes the gear lever to get stuck, making it difficult to move forward or backward, resulting in the inability to shift gears or difficulty in shifting. 3. Incomplete clutch disengagement: This may be due to failure of the clutch disc or clutch pressure plate, requiring replacement of the clutch three-piece set, including the friction disc, pressure plate, and release bearing.