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belt tensioner works together with the airbag
system. If the vehicle rolls over, the belt ten-
sioner will not be activated if the curtain air-
bags are not triggered.
A fine dust may be produced when the air-
bags are triggered. This is quite normal and
does not mean that there is a fire in the vehi-
cle.
Reversible belt tensioning (proactive occu-
pant protection system)
Reversible belt tensioning may trigger in cer-
tain driving situations → page 45. Examples
include:
— Strong braking.
— Oversteer or understeer.
— Minor collisions.
The reversible belt tensioners may re-
main continuously tensioned after cer-
tain driving situations. In this case, the seat
belts must be manually unfastened when the
vehicle is stationary and then fastened cor-
rectly again in order to release the belt ten-
sioning.
Belt tension limiter
The belt tension limiter reduces the pressure
exerted by the seat belt on the body during
an accident.
All safety requirements must be ob-
served when the vehicle or compo-
nents of the system are scrapped. Qualified
workshops are familiar with these require-
ments → page 45.
Service and disposal of belt
tensioners
Please refer to
at the start of the chap-
ter on page 36.
Seat belts may become damaged during any
work on the belt tensioners or while remov-
ing or refitting any vehicle parts in conjunc-
tion with any other repair work. This damage
will not always be noticeable. The conse-
quence may be that the belt tensioners could
function incorrectly, or not function at all, in
the event of an accident.
Regulations must be observed to ensure that
the effectiveness of the belt tensioner is not
reduced and that removed parts do not cause
any injuries or environmental pollution.
Qualified workshops are familiar with these
requirements.
WARNING
The risk of severe or fatal injuries may be
increased if the seat belts, automatic belt
retractors and belt tensioners are not used
correctly, or if they are repaired by a non-
professional. As a result, the belt tensioners
may not be triggered when they should, or
they may be triggered unexpectedly.
·
Any repairs, adjustments or removal and
refitting of parts in the belt tensioners
or seat belts should always be carried
out by a qualified workshop and never
by you yourself → page 362.
·
Seat belts, belt tensioners and automatic
belt retractors cannot be repaired. They
must be replaced.
The airbag modules and belt tension-
ers may contain perchlorate. Please
comply with legislation regarding disposal.
Proactive occupant pro-
tection system
Introduction to the topic
The proactive occupant protection sys-
tem is an assistance system that initiates
action to protect vehicle occupants in
dangerous situations. However, the sys-
tem cannot prevent a collision.
Proactive occupant protection system
45
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