Check rear of engine for external oil leak, and determine cause Risk of accident & Risk of injury - AR01.40-P-8913-01HA

Flywheel, two-mass flywheel or driven plate removed 

Secure vehicle to prevent it from moving by itself. 

Wear closed and snug-fitting work clothes. 

Do not touch hot or rotating parts. 

Fig 1: Identifying Electrical Connection Set (220 589 00 99 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

If it is not possible to clearly determine the cause of an external oil leak at the rear of the engine, proceed as follows:

1. Clean test area free of oil, dry it and spray it with crack detector.
2. Check engine oil level and correct if necessary
3. Refer to installation of flywheel/two-mass flywheel e.g. drive plate.
4. Attach starter (M1) to crankcase with bolts (2) of an adequate length.
5. Support engine in installation position at the rear.
   Fig 2: Identifying Starter To Crankcase With Bolts

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
6. With automatic transmission (except transmission 722.6): Bridge at start lock switch (S16/1) jack (arrows).
7. Warm up engine, in order to notice leakages.
8. Appoint repair measures relating to the leaky area.

Stored faults which may occur as a result of removed cables or simulations during test operations, must be erased in the fault memory after completing the work.

Fig 3: Locating Start Lock Switch Jack

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.