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Seat belts
may be that, in the event of an accident, the
belt t
ensioners function incorrectly or may
not function at all.
So that the effectiveness of the seat belt ten-
sioner is not reduced and that removed parts
do not cause any injuries or environmental
pollution, regulations, which are known to the
specialised workshops, must be observed.
WARNING
●
Impr
oper use or repairs not carried out by
qualified mechanics increase the risk of se-
vere or fatal injuries. The belt tensioners
may fail to trigger or may trigger in the
wrong circumstances.
●
The seat belt tensioner, seat belt and au-
tomatic retractor cannot be repaired.
●
Any work on the belt tensioners and seat
belts, including the removal and refitting of
system parts in conjunction with other re-
pair work, must be performed by a special-
ised workshop only.
●
The belt tensioners will only provide pro-
tection for one accident and must be
changed if they have been activated.
For the sake of the environment
Airbag modules and belt tensioners may
cont
ain perchlorate. Observe the legal re-
quirements for their disposal.
PreCrash system
Ho
w it works
The PreCrash system is an assistance system
that activ
es a series of measures to protect
the occupants of the vehicles in potentially
risky situations, but which cannot prevent a
collision.
It only works completely if no special driving
profile is selected and if there are no operat-
ing anomalies.
Basic features
Depending on the legal provisions of the
country and the features of the vehicle, in crit-
ical situations (e.g. in certain cases of emer-
gency braking or loss of control of the vehicle
by the driver) the following functions can be
activated separately or at the same time
when the vehicle is travelling faster than ap-
proximately 30 km/h (20 mph).
●
Reversible tensioning of front seat belts that
ar
e fastened.
●
Operation of the hazard warning lights.
●
Automatic closing of the windows until they
are just cracked open and, depending on the
equipment, of the sunroof.
●
In the event of overturning, depending on
the equipment, activation of the belt tension-
ers.
Depending on how critical the driving situa-
tion is, the belts are either tightened individu-
ally, or both belts at the same time.
In addition to Front Assist
In vehicles with Front Assist
›››
page 252,
within the limits of the system, information is
assessed on the risk of collision with the vehi-
cle in front. The functions of the PreCrash
system may also be activated if there is a
high likelihood of a rear-end collision, or dur-
ing the activation of Front Assist.
In addition to Side Assist
In vehicles with lane assist
›››
page 269, with-
in the limitations of each system, information
is assessed on the risk of collision with traffic
to the rear of the vehicle. If a rear-end colli-
sion is highly likely, the functions of the
PreCrash system may also be activated. In
this situation, the hazard warning lights are
turned on with a higher frequency of flashes.
In addition to the Emergency Assist system
In vehicles with emergency assist, driver sta-
tus information is assessed within the limita-
tions of this system. The following PreCrash
systems may be activated if a lack of activity
is detected:
●
Reversible seat belt tensioning of the driv-
er's seat belt.
»
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