Replacing Tensioning Device for Alternator Drive Belt

11 28 020 - Replacing tensioning device for alternator drive belt (S85)





Important!
Mark the direction of rotation of the drive belt if it is to be reused.
Replace the drive belt if it is fouled with coolant or engine oil.





Necessary preliminary tasks:
- Remove fan cowl with electric fan.
- Remove A/C compressor drive belt Replacing A/C Compressor Drive Belt.
- Remove alternator drive belt Replacing Alternator Drive Belt.





Release screws (5).
Remove belt tensioner (6).

Installation Note:
Observe the installation direction if the belt tensioner is replaced individually.
The lettering TOP must point upwards.





Assemble engine.