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

Special tools required:

51 2 190 .

Necessary preliminary tasks:

Remove SOUND INSULATION .

Installation note:

Check function of child safety catch, as problems may arise:

Lock does not center in body aperture
Lock scrapes on inner door panel
Lock snags on inner door panel

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

Installation note:

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

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

Seal (4) must be correctly fitted on Bowden cable.

Fig 1: Disconnecting Bowden Cable From Door Lock

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

Unlock plug connection (1) at lugs (2) and detach from door lock (3).

Unclip locking rod (4) from door lock (3).

Fig 2: Disconnecting Locking Rod From Door Lock

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Version with Soft Close Automatic:

Disconnect plug connection (1).

Unfasten screws (2).

Fig 3: Identifying Plug Connection And Mounting Screws

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IMPORTANT: Do not damage door lock seal during removal.

Release screws (1).

Remove door lock (2) from inside and carefully feed out.

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

Fig 4: Identifying Door Locks, Corner And Mounting Screws

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Installation note:

Gasket (1) on door lock (3) must not be damaged.

Adapter switching socket (4) must be correctly engaged.

Door wiring harness must be correctly laid in guide (3).

Fig 5: Locating Door Lock Gasket

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Installation note:

Version with Soft Close Automatic:

Make sure Automatic Soft Close system drive (1) is installed in correct installation position. Control line (3) must not be twisted around Bowden cable (2).

Make sure control line (3) is correctly laid in guides (4).

Fig 6: Identifying Soft Close Automatic Drive, Bowden Cable, Control Line And Guides

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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:

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 panel (water ingress).

Fig 8: Pre-Tensioning Door Lock With Knurled Screw Using Special Tool (51 2 190)

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

Installation note:

Carry out function check of child safety catch (1) and door lock (2) with door opened.

Fig 9: Checking Child Safety Catch And Door Lock Function

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