- the point of separation between the engine block and the gearbox (flywheel seal/gearbox shaft seal);
- driveshaft for gearbox;
- threaded oil filler plug;
- threaded drain plug.
When searching for a leak, proceed as follows:
1. Clean the transmission housing with a low temperature cleaner.
Publication taken from an online resource: MercedesMAN.ru
2. Check the oil level. To do this, unscrew the threaded plug of the oil filler hole (1). The oil level should reach the lower edge of the filler hole; add transmission oil if necessary.
3. Tighten the oil filler plug securely to a maximum torque of 60 Nm.
4. Spray suspected leak areas with lime or talcum powder.
5. Test drive. To make the oil flow easily, drive on a highway for a distance of approximately 30 km.
6. Then lift the car and inspect the gearbox with a light to detect oil leaks.
7. Eliminate leaks immediately.