51 22 090 Removing and installing/replacing door lock in left or right rear door

Special tools required:

Necessary preliminary tasks:

Completely close side window if necessary
Partially remove SOUND INSULATION (in area of door lock)

Open expanding rivet (2) and lever out of cover (1) using special tool 00 9 325 .

Feed out cover (1) and place to one side.

Fig 1: Pulling Out Door Lock Cover Using Special Tool (00 9 325)

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Remove adhesive tape.

Release nut (1) of guide rail.

Tightening torque 51 35 3AZ .

Fig 2: Identifying Guide Rail Nut

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Release lower nut (1) of guide rail.

Tightening torque 51 35 3AZ .

Fig 3: Identifying Guide Rail Lower Nut

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Feed rubber window seal (2) out of guide rail (1).

Feed guide rail (1) out of inner door panel and place to one side.

Fig 4: Identifying Rubber Window Seal And Guide Rail

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Disconnect Bowden cable at bottom (1) and then from top (3) at door lock (2).

Installation note:

Bowden cable must be correctly engaged in fixture at bottom (1) and top (3) of door lock (2).

Fig 5: Disconnecting Bowden Cable From Door Lock

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Unclip locking rod (1).

Disconnect plug connection (2) on door lock.

Release screws (3) on door lock.

Feed out door lock (4).

Fig 6: Identifying Door Lock, Locking Rod, Screws, And Plug Connection

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Installation note:

Install door lock and insert screws (1), do not tighten down.
Slide special tool 51 2 190 into opened rotary striker until striker engages in first stage

Fig 7: Sliding Special Tool (51 2 190) Into Opened Rotary Striker

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Installation note:

Pre-tension door lock (1) with knurled screw (2) until special tool 51 2 190 just contacts corner points (3)

IMPORTANT: To tension door lock (1), it is only permitted to tighten knurled screw (2) by a further 1 to 1.5 turns (max.) (risk of damage).
Door lock seal must rest uniformly on inner door panel (water ingress).

Fig 8: Installing Door Lock Using Special Tool (51 2 190)

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Tighten screws of door lock

Observe tightening sequence: bottom - top - inner.

Tightening torque 51 22 3AZ .