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Your vehicle has two-stage front airbags. In
the first deployment stage, the front airbag is
filled with propellant gas to reduce the risk of
injuries. The front airbag is fully deployed if
the second deployment stage is activated
within a few milliseconds.
The activation threshold for the seat belt ten-
sioners and airbags is determined based on
the evaluation of the vehicle's rate of decel-
eration or acceleration at various points in the
vehicle. This process is pre-emptive in nature.
The triggering/deployment process should
take place in good time at the start of the
collision.
The rate of vehicle deceleration or accelera-
tion and the direction of the force are essen-
tially determined by:
R
the distribution of forces during the colli-
sion
R
the collision angle
R
the deformation characteristics of the vehi-
cle
R
the characteristics of the object with which
the vehicle has collided
Factors which can only be seen and measured
after a collision has occurred do not play a
decisive role in the deployment of an airbag,
nor do they provide an indication of airbag
deployment.
The vehicle may be deformed significantly
without an airbag being deployed. This is the
case if only parts which are relatively easily
deformed are affected and the rate of decel-
eration is not high. Conversely, an airbag may
be deployed even though the vehicle suffers
only minor deformation. This is the case if, for
example, very rigid vehicle parts such as lon-
gitudinal body members are hit, and sufficient
deceleration occurs as a result.
If the restraint system control unit detects a
side impact or if the vehicle overturns, the
applicable components of the restraint sys-
tem are activated independently of each
other depending on the apparent type of acci-
dent. If the system determines that, in this
situation, triggering can offer additional pro-
tection, the seat belt tensioners are also trig-
gered.
R
Sidebag on the side on which an impact
occurs, independent from the seat belt ten-
sioner and seat belt usage
Vehicles with automatic child seat recog-
nition on the front-passenger seat: the
sidebag on the front-passenger side
deploys under the following conditions:
-
an occupant is detected on the front-
passenger seat or
-
the belt tongue is engaged in the belt
buckle of the front-passenger seat
i
Not all airbags are deployed in an acci-
dent. The different airbag systems work
independently of each other.
How the airbag system works is deter-
mined by the severity of the accident detec-
ted, especially the vehicle deceleration or
acceleration, and the apparent type of acci-
dent:
R
frontal collision
R
side impact
R
overturn
PRE-SAFE
®
(anticipatory occupant
protection)
Introduction
PRE-SAFE
®
takes pre-emptive measures to
protect occupants in certain hazardous sit-
uations.
Important safety notes
!
Make sure that there are no objects in the
footwell under or behind the seats when
Occupant safety
45
Saf
ety
Z
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