12 42 550 Replacing Battery Positive Lead Between Starter, Alternator and Battery Positive Terminal

12 42 550 Replacing Battery Positive Lead Between Starter, Alternator And Battery Positive Terminal (S63)







Necessary preliminary tasks:
- Read out fault memory of DME control unit
- Turn off ignition
- Disconnect battery negative lead
- Remove right intercooler
- Remove intake air manifold







Open cover.
Release screw (1).
Tightening torque 12 42 3AZ.
Remove battery positive lead (2) from battery positive terminal.







Release clamps (1) and (2).
Replace clamps.
Pull off wastegate lines (3) from air duct.







Release coolant lines from the clamps (1).
Unclip positive battery cable (2) from holder.







Release clamps (1).
Replace clamps.
Release screw (2).
Tightening torque 13 71 13AZ.
Release screws (3) from charge air cooler.
Tightening torque 13 71 6AZ.
Remove air duct (5).







Release screws (1).
Tightening torque 13 71 1AZ.
Pull off air ducts (2) from the exhaust turbocharger and place to one side.
Check gaskets for damage. Renew damaged gaskets.







Unlock plug (1) and remove.
Detach cover (2) and release nut underneath.
Tightening torque 12 42 1AZ.

Installation:
Reinstall cover (1) without fail.
Risk of short circuits.

Disconnect positive battery cable from alternator.







Release battery positive lead (1) from retainers (2).







Release battery positive lead (1) from retainer (2).







Release screws (1).
Tightening torque 12 42 7AZ.
Release nut (2) on starter.
Tightening torque 12 42 2AZ.
Disconnect battery positive lead (3).







NOTE:
Reassemble the vehicle.
Check stored fault message.
Delete fault memory.

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