52 17 385 Replacing Gas Cartridge For Active Head Restraint On Left Or Right Front Seat
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WARNING:
Read and comply with safety regulations
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. Refer to 52 17 390 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT HEAD RESTRAINT (COMFORT) .
- Remove rear panel on front seat backrest. Refer to 52 14 198 REMOVING AND INSTALLING/REPLACING REAR PANEL ON LEFT OR RIGHT FRONT SEAT BACKREST (NORMAL/ELECTRIC) and 52 17 205 REMOVING AND INSTALLING/REPLACING BOTH REAR PANELS ON LEFT OR RIGHT FRONT SEAT BACKREST (COMFORT) .
Disconnect plug connection on gas cartridge.
Detach retaining points (1).
Slide active head restraint carrier downwards.
Release springs (1) and (2).
Release screws (1).
Remove gas cartridge complete with holder (2).
Release screws (1) on left and right.
Installation:
Insert screws (1) with Loctite.
For tightening torque refer to 52 10 18AZ in 52 10 FRONT SEATS .
Slide top rail (3) off bottom rail (2).
Remove gas cartridge (4).
Installation:
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.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.