Door Locks: Service and Repair

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

Special tools required:







Necessary preliminary tasks:
- If necessary, close side window
- Remove sound insulation in rear door







Disconnect Bowden cable 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.

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







Lever out locking rod (1).
Unfasten plug connection (2) and disconnect.
Release screws (3) and manoeuvre out door lock above door aperture.

IMPORTANT: Do not damage gasket at door lock during removal (water ingress).







Installation note:
Install door lock (1) and screw in screws (2) but to not tighten.
Slide special tool 51 2 190 into opened rotary striker until striker engages in first stage







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).

Tighten screws of door lock
Tightening torque 51 22 1AZ.







Installation note:
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