Rear Door Latch: Service and Repair

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





Special tools required:
- 51 2 190 51 2 190 Door Lock Tensioner





Necessary preliminary tasks:
- Close window in rear door
- Remove function carrier
- Remove reflector Replacing Door Reflector from door





Build date up to 09/04:
Feed out fiber optics cable.





Feed out Bowden cable on carrier.
1 - Pull out Bowden cable towards bottom
2 - Pull out Bowden cable sideways

Note:
Only fit clip (3) on Bowden cable with blue sealing cap.





Important!
Do not damage door lock seal when removing.

Unclip lock knob control rod (1).

Release screws (2).
Remove door lock from inside (twist out).

Important!
To avoid leakage and electrical malfunction, pull door lock with special tool 51 2 190 51 2 190 Door Lock Tensioner into corner (3), refer to next work step.
Door lock must be at zero current with Soft Close Automatic (risk of damage).





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





Installation:
- Pretension door lock (1) with knurled screw (2) until special tool 51 2 190 51 2 190 Door Lock Tensioner 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 be uniformly positioned (water ingress).

- Tighten down door lock screws (1), tightening torque 51 22 1AZ [1][2]Specifications.





Installation:
Seal (1) must not be damaged.
Door lock must be replaced if seal (1) is faulty.





Build date up to 09/04:

Installation:
Fiber optics cable (1) must be routed below bridge (2).





Replacement:
Feed out Bowden cable:
1. Pull out Bowden cable sleeve.
2. Turn Bowden cable and pull out.