72 11 033 Removing and Installing/Replacing Front Left or Right Seat Belt

72 11 030 - Removing and installing or replacing front seat belt





Important!
Read and comply with safety regulations [1][2][3]Safety Precautions and General Information for handling airbag modules and pyrotechnical belt pretensioners.
Inexpert handling can trigger off the airbag or the belt pretensioner and thereby cause injuries.
If a seat belt which is damaged due to an accident is exchanged, always check the affected seat for damage.





Necessary preliminary tasks:
- Remove front seat Removing and Installing Left or Right Front Seat (Normal/Electric)
- Remove and install rear panel Removing and Installing/Replacing Rear Panel on Left or Right Front Seat Backrest on front seat
- Remove trim cover for outer fitting Removing and Installing/Replacing Trim Cover for outer Fitting on Front Seat
- Remove inner cover Removing and Installing/Replacing Inner Cover on Left or Right Front Seat on front seat
- Partially detach seat cover Replacing Cover for Left or Right Front Seat
- Partially detach backrest cover Replacing Backrest Cover for Left or Right Front Seat





Important!
Do not detach coupling gear from flex shaft.
If a new belt system is fitted, always use a new coupling gear.
If a new coupling gear is fitted, always replace the top belt.





Removing inertia reel with flex shaft and coupling gear:
Release screw.

Installation Note:
Replace microencapsulated screw.

Tightening torque 72 11 02AZ Specifications.

Remove end fitting.






Installation Note:
Plastic washer on end fitting must be fitted!
End fitting is coded to prevent incorrect installation.





Unclip all cables from guides.
Release screw (1).
Tightening torque: 72 11 09AZ Specifications.
Release stud (2).
Tightening torque: 72 11 08AZ Specifications.






Note:
Replace driver (1) after removal with a new component as damage cannot be excluded.
When removing driver (1), ensure guide (3) and lever (2) of coupling gear are not damaged.
Remove driver (1) from backrest shaft.





Installation Note:
Do not fit new driver (1) on backrest shaft yet.
Backrest must be in as vertical a position as possible.
Driver (1) and lug are positioned at an angle towards top in direction of travel (arrow).





Installation Note:
Feed driver (1) into slot (3) in lever (2) of coupling gear.
Align lever (2) on coupling gear so that slot (3) is correctly positioned with respect to driver (1).





Installation Note:
Pin on coupling gear must reach into hole in seat.





Installation Note:
Make sure groove and pin are correctly positioned.
Clip flexible shaft (1) into place with coupling gear (2).
Ensure complete engagement by pulling gently on flex shaft.
Flexible shaft must not clip out here!





Unclip flexible shaft (3) from cable tie (2).
Unclip cable tie (1) from backrest.





Release nut and remove inertia reel with flexible shaft and coupling gear.
Replace nut.
Tightening torque 72 11 01AZ Specifications.

Installation Note:
Inertia reel is coded to prevent incorrect installation.





Remove belt guide - build date (version) up to 09/08:
Unclip cover (1) with plastic wedge.





Release screw (1).
Tightening torque 72 11 03AZ Specifications.
Remove seat belt guide.





Remove belt guide - build date (version) from 09/08:

Note:
Protect belt guide against damage (scratches).
Trims of belt guide at front and rear (1) are destroyed when removed!

Installation Note:
Pay particular attention to cutting line between both trims.
If the trims are not fully clipped into place, this will result in grinding noises when the belt is pulled.





Release screw on belt guide.
Tightening torque 72 11 03AZ Specifications.





Release further screw on belt guide and detach belt guide.
Remove complete seat belt with belt guide, inertia reel with flex shaft and coupling gear.
Do not kink flex shaft and do not transport inertia reel by flex shaft.