Replacing Tensioning Device for Alternator Drive Belt

11 28 020 Replacing tensioning device for alternator drive belt (S63T)

Special tools required:







Necessary preliminary tasks:
- Remove alternator drive belt







If necessary, remove special tool 11 0 390 .
Release screw (1).
Tightening torque 11 28 1AZ.
Remove belt tensioner with idler pulley (2).







Assemble engine.