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

WARNING: This page is about a different variant/trim than selected.

Special tools required:

51 2 190

Necessary preliminary tasks:

Remove SOUND INSULATION

Unlock and disconnect plug connection (2) at lugs (1).

Unhook Bowden cable (3) from door lock (4).

Unclip lock knob control rod (5).

Fig 1: Identifying Plug Connection, Lugs, Lock Knob Control Rod And Bowden Cable

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Unhook Bowden cable (1) from door lock (2).

If necessary, release cable holder on door lock (2).

Installation:

Bowden cable (1) must be correctly engaged in locators in door lock (2).

Bowden cable (1) must be laid without kinks in bend to door lock (2).

IMPORTANT: Door cannot be opened if Bowden cable (1) is incorrectly laid.

Fig 2: Releasing Bowden Cable From Door Lock

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IMPORTANT: Do not damage door lock seal during removal.

Release screws (1).

Remove door lock (2) from inside.

IMPORTANT: To avoid leaking and electrical malfunction:
Pull door lock (2) with special tool into corner (3), see Fig 5Figs. R51 3381 and Fig 6R51 7594.

Fig 3: Identifying Door Lock With Mounting Screws

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Installation:

Seal (1) on door lock (2) must not be damaged.

Fig 4: Locating Seal On Door Lock

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Installation:

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

Fig 5: Sliding Special Tool 51 2 190 Into Opened Rotary Striker
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Installation:

Pretension 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 turn knurled screw (2) by a further 1 to 1.5 turns (max.) (risk of damage).

Door lock seal must rest uniformly on inner door plate (water ingress).

Fig 6: Pretensioning Door Lock With Knurled Screw Until Special Tool 51 2 190

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Tighten down door lock screws, tightening torque 51 22 1AZ .

Installation:

Check function of child lock (1) on door lock (2).

Fig 7: Checking Function Of Child Lock On Door Lock

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