12 42 510 Replacing battery positive lead (between starter motor and B+ terminal) (M54 / M56)
Read fault memory. Switch off ignition.
Observe safety instructions for handling vehicle battery.
Remove front underbody protection.
Follow instructions for disconnecting and connecting battery. See 12 00... Instructions for disconnecting and connecting battery
Disconnect battery negative lead from battery and lay to one side.
Open cable duct on lower section of microfilter housing and feed out battery positive lead (1).
Fold up protective cap (1).
Unscrew nut (2).
Disconnect battery positive lead (3) from connection point.
Installation:
Remove cover for fuel injectors. 11 12 000 REMOVING AND INSTALLING, SEALING CYLINDER HEAD COVER (M52TU / M54 / M56)
Unclip battery positive lead (1) from holder (2).
Remove reinforcement plate on front axle support. See 51 71 374 REMOVING AND INSTALLING/REPLACING REINFORCEMENT PLATE ON FRONT AXLE SUPPORT
If fitted:
Remove vacuum reservoir for exhaust flap. See 18 10 020 REMOVING AND INSTALLING/REPLACING VACUUM TANK FOR EXHAUST FLAP
Unscrew nut (1).
Installation:
Disconnect battery positive lead (2) from starter motor.
Remove battery positive lead.
- Read out fault memory of DME control unit
- Check stored faults
- Rectify faults
- Clear fault memory