The rate of vehicle deceleration or acceleration
and the direction of the force are essentially
determined by:
R
the distribution of forces during the collision
R
the collision angle
R
the deformation characteristics of the vehicle
R
the characteristics of the object with which
the vehicle has collided
Factors that can be seen and measured only
after a collision has occurred do not play a deci-
sive role in the deployment of an airbag. Nor do
they provide an indication of airbag deployment.
The vehicle may be deformed significantly with-
out an airbag being deployed. This is the case if
only parts that are relatively easily deformed are
affected and the rate of deceleration is not high.
Conversely, an airbag may be deployed even
though the vehicle suffers only minor deforma-
tion. This is the case if, for example, very rigid
vehicle parts such as longitudinal body mem-
bers are hit, and sufficient deceleration occurs
as a result.
If the restraint system control unit detects a side
impact, the applicable components of the
restraint system are activated independently of
each other.
R
Sidebag on the side on which an impact
occurs, independently of the seat belt ten-
sioner and seat belt usage
Vehicles with the automatic front-passenger
front airbag deactivation system: the sidebag
on the front-passenger side deploys under the
following conditions:
-
an occupant is detected in the front-
passenger seat or
-
the seat belt buckle tongue is engaged in
the belt buckle of the front-passenger seat
R
Windowbag on the side on which an impact
occurs, independently of seat belt usage and
regardless of whether the front-passenger
seat is occupied
R
Seat belt tensioners, if the system determines
that deployment can offer additional protec-
tion for the vehicle occupants in this situation
i
Not all airbags are deployed in an accident.
The different airbag systems work independ-
ently of each other.
How the airbag system works is determined
by the severity of the accident detected,
especially the vehicle deceleration or accel-
eration, and the apparent type of accident:
R
frontal collision
R
side impact
PRE-SAFE
®
(anticipatory occupant
protection)
Introduction
In certain hazardous situations, PRE-SAFE
®
takes pre-emptive measures to protect the vehi-
cle occupants.
Important safety notes
!
Make sure that there are no objects in the
footwell or behind the seats. There is a risk
that the seats and/or the objects could be
damaged when PRE-SAFE
®
is activated.
Although your vehicle is equipped with PRE-
SAFE
®
, the possibility of injury in the event of an
accident cannot be ruled out. Always adapt your
driving style to the prevailing road and weather
conditions and maintain a sufficient, safe dis-
tance from other road users. Drive carefully.
Function
PRE-SAFE
®
can detect certain hazardous situa-
tions and take pre-emptive measures to protect
the vehicle occupants. PRE-SAFE
®
can activate
the following components independently of
each other:
R
the front seat belts are pre-tensioned
R
if the vehicle skids, the side windows and the
panorama sliding sunroof are closed
R
vehicles with the memory function: the co-
driver's seat is adjusted if it is in an unfavour-
able position
If the hazardous situation passes without result-
ing in an accident, PRE-SAFE
®
slackens the belt
pre-tensioning. All settings made by PRE-SAFE
®
can then be reversed.
58
Occupant safety
Safety
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