12 42 530 Replacing Battery Positive Lead (Between Starter and Alternator)

12 42 530 - Removing and installing/replacing battery positive lead (between starter motor and alternator) (M57TU, M57T2)





Necessary preliminary tasks:
- Read out fault memory of DME control unit
- Switch off ignition
- Disconnect battery negative lead
Follow instructions for disconnecting and connecting battery





Release nut and remove battery positive lead (2) from alternator.

Installation:
The positive power supply of the preheating control unit is also connected to terminal 30 of the alternator. This lead must be connected without fail, otherwise the preheating system will fail.

Tightening torque 12 31 1AZ [1][2]Specifications.





Slacken nut (1).
Tightening torque 12 41 4AZ [1][2]Specifications.
Detach battery positive lead (2) from starter motor and remove.

Note:
For a better overview, this work step is shown from below. Carry out removal of battery positive lead from above.





Note:
Check stored fault messages.
Now clear the fault memory.