Alternator: Service and Repair

Removing And Installing Or Replacing Alternator (M54)

Necessary preliminary tasks:
- Check stored fault messages.
- Switch off ignition.
- Follow instructions for disconnecting and connecting battery.
- Disconnect battery negative terminal and cover.
- Remove suction filter housing.
- Remove alternator drive belt.







Unlock and detach plug connection (1).
Release nut (2) and remove battery positive lead.
Tightening torque
Terminal D+ M6 7 Nm
Terminal B+ M8 13 Nm







Remove cover from idler pulley (1).
Release screw and remove idler pulley (1).
Release screw and remove alternator (2).







Installation:
Turning lock of tensioning roller must engage in alternator groove.


NOTE:
- Interrogate fault memory of DME control unit.
- Now clear the fault memory.