12 42 530 Replacing battery positive lead (between starter motor and alternator) (M54/M56)
Read fault memory. Switch off ignition.
Observe safety instructions for handling vehicle battery, refer to 61 00... SAFETY INSTRUCTIONS FOR HANDLING VEHICLE BATTERY .
Remove front underbody protection.
Follow instructions for disconnecting and connecting battery, refer to 12 00... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .
Disconnect battery negative lead from battery and lay to one side.
Remove suction filter housing, refer to 13 71 000 REMOVING AND INSTALLING INTAKE FILTER HOUSING (M54) .
Release nut and disconnect battery positive lead (2) from alternator.
Installation:
Tightening torque, refer to 12 31 1AZ in ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .
Release screw connection of battery positive lead (1) (floorpan).
Release nut on starter motor (3).
Installation:
Tightening torque, refer to 12 41 4AZ in ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .
Detach battery positive lead (1) from holder (2).
- Read out fault memory of DME control unit
- Check stored faults
- Rectify faults
- Clear fault memory