Rear Door Latch: Service and Repair

51 22 090 Removing And Installing/Replacing Door Lock In Left Or Right Rear Door

Special tools required:







Necessary preliminary tasks:
- Remove sound insulation







Installation:
Check function of child safety catch, as problems may arise:
- Lock does not centre in body aperture
- Lock scrapes on inner door panel
- Lock snags on inner door panel







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

Installation:
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.

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







Unclip locking rod (1).







Version with Soft Close Automatic:
Disconnect plug connection (1).
Unfasten screws (2).
Tightening torque 51 22 7AZ.







IMPORTANT: Do not damage door lock seal when removing.

Release screws (1).
Tightening torque 51 22 1AZ.
Remove door lock if necessary with Soft Close Automatic.







Installation:
Seal (1) on door lock (3) must not be damaged.







Installation:
Version with Soft Close Automatic:
Make sure Soft Close Automatic 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).







Installation:
- 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







Installation:
- 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 plate (water ingress).

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