A4 1.9 TDI: Engine Jerks Like Clutch Slipping (Solution)

Problem:
The vehicle jerks when starting and engaging the clutch, similar to a slipping clutch, or the transmission makes clunking noises during sudden load changes. This is more pronounced when the vehicle is cold and disappears as the temperature increases.

Cause: Excessive flexibility of the rear gearbox mount.

Solution: For vehicles up to 8E-4-150,000 km, use transmission mount 8E0 399 105 DK (for C90 transmissions).
Alternatively, install part number 8E0 399 105 DL (for ML310 transmissions from model year 2004 onwards).
In addition to the above chassis number, the corresponding tunnel support must also be replaced due to a changed contact surface.