Why does the Mercedes-Benz still not move when shifted to D gear?

[MasonFitz]

There are several reasons why a Mercedes-Benz may not move when shifted to D gear, including insufficient transmission fluid or low internal oil pressure, incorrect gear switch signals, or issues with the shift solenoid valve wiring or the solenoid valve itself. Below are the specific causes and solutions for a Mercedes-Benz not moving when shifted to D gear: Internal transmission issues: Problems with the internal transmission actuators. Shifting gears allows the car to drive at a very low stable speed, which is difficult to achieve with the minimum stable speed of the internal combustion engine alone. The reverse gear in the transmission enables the car to move backward, while the neutral gear allows the engine to be separated from the drivetrain for extended periods during engine startup, parking, and coasting. Other malfunction indicator lights staying on: It is necessary to take the car to a 4S shop or repair shop to inspect the relevant modules and components. If only the engine malfunction indicator light stays on, try restarting the engine and observe whether the light remains on. If the engine malfunction indicator light turns off, there is no issue. If it stays on, the engine-related components and modules need to be inspected at a 4S shop or repair shop.

[CassandraRose]

I've been driving a Mercedes for over a decade and have encountered similar situations where the car doesn't move when shifted to D. The most common reason is the brake pedal not being fully released, especially in some Mercedes models with a foot brake function. If it's not pressed firmly or gets stuck, the car won't move. Another possibility is a transmission issue, such as low transmission fluid or mechanical parts getting stuck. I recommend first checking the foot brake by pressing the pedal a few times. If it still doesn't work, try turning the engine off and restarting. Avoid pushing the car hastily to prevent damage to the transmission. In winter, a weak battery during cold starts might also affect the electronic systems, causing gear signals to fail. It's best to visit a professional repair shop promptly to scan for error codes, which can quickly pinpoint the issue. Safety comes first—don't panic in such situations. Park the car properly and inspect carefully.