12 42 550 Replacing battery positive lead between starter, alternator and battery positive terminal (N63)

Necessary preliminary tasks: 

• Read out fault memory of DME control unit
• Turn off ignition
• Disconnect BATTERY NEGATIVE LEAD
• Remove RIGHT INTERCOOLER
• Remove RIGHT INTAKE MANIFOLD

Open cover.

Release screw (1).

Tightening torque 12 42 3AZ .

Remove battery positive lead (2) from battery positive terminal.

Release battery positive lead (2) from retainers (3).

Fig 1: Identifying Battery Positive Lead And Screw

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Release clamp (1).

Tightening torque 13 71 8AZ .

Release clamp (2).

Replace clamp (2).

Remove left charge-air duct (3).

Check gasket on turbocharger. Replace damaged gasket.

Fig 2: Identifying Clamp And Charge-Air Duct

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Detach hose (1) from clean-air pipe.

Release screw (2).

Tightening torque 13 71 1AZ .

Detach clean-air pipe (3) in direction of travel from turbocharger.

Check gasket on clean-air pipe. Replace damaged gasket.

Fig 3: Identifying Hose, Screw And Air Pipe

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Detach cover (1) and release nut underneath.

Tightening torque 12 42 1AZ .

Installation: 

Reinstall cover (1) without fail.

Risk of short circuits! 

Fig 4: Identifying Cover Of Battery Positive

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Disconnect battery positive lead (2) from alternator.

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

Fig 5: Identifying Battery Positive Lead And Retainers

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

Fig 6: Identifying Battery Positive Lead From Retainer

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Release screws (1).

Tightening torque 12 42 7AZ .

Release nut (2) on starter.

Tightening torque 12 42 2AZ .

Feed out battery positive lead (3) and remove.

Fig 7: Identifying Screws And Battery Positive Lead

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