Materials required:
- gearbox oil approved for use by Mercedes-Benz.
Examination
Transmission oil leaks may occur in the following places:
- at the junction between the cylinder block and the gearbox (flywheel seal/gearbox shaft seal);
- on the oil filler/inspection hole plug;
- on the threaded drain plug;
- at the point where the drive shafts are connected to the gearbox.
[Article obtained from this portal MercedesMAN]
To locate leaks, follow these steps:
1. Vehicles with diesel engine. Remove the engine splash guard, see the relevant chapter.
2. Clean the gearbox housing with cold cleaning agent.
3. Sprinkle suspected transmission oil leaks with lime or talc.
4. Perform a test drive. Since the oil becomes more fluid when the engine heats up and leaks faster in places where the seal is broken, the test drive should be about 30 km long.
5. Place the car on jack stands.
Warning: Jacking up or jacking up a vehicle can pose a risk of injury, so please read the safety precautions before attempting to do so.
6. Inspect the gearbox using a flashlight and locate any leaks.
7. Fix leaks.
8. Vehicles with diesel engine: Replace the engine splash guard, see the relevant chapter.