What's the reason for a Volkswagen 7-speed dual-clutch transmission not moving when engaged?

[King]

Volkswagen 7-speed dual-clutch transmission not moving when engaged may be due to the following reasons: Automatic transmission oil pan leakage: Loosening of the linkage or cable between the control lever and the manual valve rocker arm, manual valve remaining in neutral or parking position, clogged oil pump inlet filter screen, severe leakage in the main oil circuit, or oil pump damage. Not pressing the accelerator: Some automatic transmission vehicles can move when shifted to D gear and the brake is released, while others require pressing the accelerator to move. This is actually related to the type of transmission power coupling device. After shifting to D gear, the clutch remains disengaged, and no power is transmitted, so the vehicle does not move. When the accelerator is pressed, the clutch gradually engages, allowing power to be transmitted, and the vehicle begins to move forward.