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.

Fig 1: Identifying Screw And Battery Positive Lead

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Release clamps (1) and (2).

Replace clamps.

Pull off wastegate lines (3) from air duct.

Fig 2: Identifying Clamps And Wastegate Lines

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Release coolant lines from the clamps (1).

Unclip positive battery cable (2) from holder.

Fig 3: Identifying Coolant Lines Clamps And Positive Battery Cable

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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).

Fig 4: Identifying Clamps, Screws And Air Duct

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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.

Fig 5: Identifying Screws And Air Ducts

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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!

Fig 6: Identifying Plug And Cover

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Disconnect positive battery cable from alternator.

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

Fig 7: Identifying Battery Positive Lead And Retainers

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

Fig 8: Identifying Battery Positive Lead And Retainer

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Release screws (1).

Tightening torque 12 42 7AZ .

Release nut (2) on starter.

Tightening torque 12 42 2AZ .

Disconnect battery positive lead (3).

Fig 9: Identifying Screws, Nut And Battery Positive Lead

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