Mercedes-Benz Vito 111 CDI/BlueTEC Operating Instructions Manual page 61

This process is pre-emptive in nature. The trig-
gering/deployment process should take place
in good time at the start of the collision.
The rate of vehicle deceleration or acceleration
and the direction of the force are essentially
determined by:
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
R
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.
Sidebag on the side on which an impact
R
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
Windowbag on the side on which an impact
R
occurs, independently of seat belt usage and
regardless of whether the front-passenger
seat is occupied
Seat belt tensioners, if the system determines
R
that deployment can offer additional protec-
tion for the vehicle occupants in this situation
Not all airbags are deployed in an accident.
i
The different airbag systems work independ-
ently of each other.
Occupant safety
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:
frontal collision
R
side impact
R
®
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
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
the following components independently of
each other:
the front seat belts are pre-tensioned
R
if the vehicle skids, the side windows are
R
closed
vehicles with the memory function: the co-
R
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
pre-tensioning. All settings made by PRE-SAFE
can then be reversed.
59
®
®
is activated.
®
can activate
®
slackens the belt
®
Z