51 21 035 Removing and Installing/Replacing Function Carrier On Left or Right Front Door

Necessary preliminary tasks:

IMPORTANT:

Risk of mixing up plugs for door lock and control unit!

Mark relevant plugs prior to removal.

Disconnect plug connections (2).

Disconnect cable holder (3); if necessary, release cable tie.

Feed out door wiring harness through wiring harness opening (4).

Fig 1: Identifying Plug Connections & Cable Holder

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Release quick-release couplings.

Remove function carrier.

Installation:

If necessary, replace defective quick-release couplings.

Make sure quick-release couplings are installed in correct position.

Quick-release coupling 1.8 mm grey
Quick-release coupling 0.8 mm white

Fig 2: Releasing Quick-Release Coupling
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Installation:

Seal on function carrier (sound insulation) must not be damaged.

Fig 3: Identifying Function Carrier Seal

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