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Read and comply with safety regulations for handling airbag modules and pyrotechnical belt tensioners.
Incorrect handling may result in triggering of the crash-active headrest and thereby cause injury.
Switch off the ignition!
Necessary preliminary tasks:
Adjust head restraint towards top to maximum extent
Disconnect battery negative cable
Renewal of pyrotechnics may be carried out up to 5 times.
Triggering frequency is denoted on the sticker on the head restraint carrier.
Labels are available as spare parts.
Head restraint is in the crash position after activation.
Firing unit can only be removed in the triggered state.
The complete head restraint must be replaced in the event of a crash-active headrest fault message and non-activated igniter.
Insert flat plastic wedge in marked area.
Unlock cover towards bottom and simultaneously press towards rear.
Repeat procedure on other side.
Press cover towards top to unlock latch mechanism in marked area.
Simultaneously pull cover towards rear.
Put down cover towards rear.
Press together mounting (1) for pyrotechnics at tabs.
Feed out pyrotechnics.
Pull pyroactivator (2) out of mount (1) for pyrotechnics.
Unlock plug connection (3) and disconnect.
Dispose of plastic element and pyroactivator.
Procedure for installing pyrotechnics:
Bringing head restraint together (multifunction seat):
Pull apart spring catches and push together head restraint.
Locking release plate:
Hold pushed-together head restraint in position and push release plate (1) upwards up to limit position.
Release plate (1) must audibly snap into place.
Checking head restraint lock:
Check end position of release plate (1).
All four springs (2) must be engaged.
Connect connector (1) to new pyroactivator (2) and lock.
Clip pyroactivator (2) into new mount (3).
Press together mounting for pyrotechnics at tabs.
Insert mounting for pyrotechnics into release plate and tilt in upward direction.
Mounting for pyrotechnics must audibly snap into place.
Check seating of retaining lugs in mounting.
Laying wiring harness:
Secure wiring harness in support section with strain relief.
Clip cover onto support section.
Cover must audibly snap into place.