Replacing Gas Cartridge for Active Head Restraint on Left or Right Front Seat

52 17 385 - Replacing gas cartridge for active head restraint on left or right front seat





Warning!
Read and comply with safety regulations [1][2]Safety Regulations For Handling Airbag System Components for handling airbag modules and pyrotechnical belt tensioners.
Improper handling can lead to triggering of the pyrotechnical seat belt tensioner or side airbag, resulting in injuries.

Switch off ignition!





Necessary preliminary tasks:
- Remove head restraint Removing and Installing/Replacing Front Left or Right Head Restraint (Comfort)

- Remove rear panel Removing and Installing/Replacing Both Rear Panels on Left or Right Front Seat backrest (Comfort) on front seat backrest





Disconnect plug connection on gas cartridge.
Detach retaining points (1).
Slide active head restraint carrier downwards.





Release spring clips (1) and (2).





Release screws (1).
Remove gas cartridge complete with holder (2).





Release screws (1) on left and right.

Installation Note:
Insert screws (1) with Loctite(R).
Tightening torque 52 12 18AZ Front Seats.

Slide top rail (3) off bottom rail (2).
Remove gas cartridge (4).





Installation Note:
Gas cartridge (1) is secured in holder by guide lug (2).





Procedure after triggered active head restraint:
- Push head restraint back into original position.

- Insert new gas cartridge with spring clips.

Note:
The gas cartridge may be replaced up to 5 times.
Then the backrest must be replaced.
Number of triggerings are stored in the control unit.