300SL (129.061) L6-3.0L (104.981) (1991)
4. Unscrew bolts (25) and take off bearing flange.
Examine ground face of bearing flange signs of damage.
5. Take off pressure plate (3).
6. Take off cam insert (6).
Examine ground face of pressure plate as well as sliding face of vanes on cam insert (6) for signs of scoring and wear.
There must not be any perceptible scoring present on the sliding surface of the cam insert.
7. Take locking ring (18) off the drive shaft. Replace locking ring.