Mercedes-Benz 280 C, Руководство пользователя

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sary specialist knowledge and tools to carry
out the work required. Mercedes-Benz rec-
ommends that you use a Mercedes-Benz
Service Centre for this purpose. In particu-
lar, work relevant to safety or on safety-re-
lated systems must be carried out at a quali-
fied specialist workshop.
Triggering of belt tensioners, belt force
limiters and airbags
In the event of a collision, the sensor in
the airbag control unit evaluates important
physical data such as duration, direction
and force of the vehicle deceleration or ac-
celeration. Based on the evaluation of this
data and depending on the vehicle's rate
of longitudinal deceleration in a collision,
in the first stage the airbag control unit
pre-emptively triggers the belt tensioners.
The front airbags are only deployed if there
is an even higher rate of vehicle decelera-
tion in a longitudinal direction.
If your vehicle is fitted with adaptive dual-
stage front airbags, the front airbag is
filled with enough gas to reduce the risk of
injuries at the first deployment threshold.
The front airbag is only fully inflated if a
second threshold is reached within a few
milliseconds due to the control unit having
detected further deceleration.
i
The front belt tensioners can only be trig-
gered if the belt tongue is correctly engaged in
the seat belt buckle.
Criteria for triggering belt tensioners
and airbags
In the first stages of a collision, the sensor
in the airbag control unit evaluates physi-
cal data such as duration, direction and
rate of vehicle deceleration or acceleration
in order to determine whether it is neces-
sary to trigger the belt tensioners and/or
airbags.
The belt tensioner and airbag triggering
thresholds are variable and are adapted to
the rate of deceleration of the vehicle. This
process is pre-emptive in nature as the air-
bag must be deployed during
–
and not at
the end of
–
the collision.
i
Airbags are not deployed in all types of ac-
cident. They are controlled by complex sensor
technology and evaluation logic. This process
is pre-emptive in nature as airbag deployment
must take place during the impact and must be
adapted to provide calculated, additional pro-
tection for the vehicle occupants. Not all air-
bags are deployed in an accident.
The different airbag systems work independ-
ently of each other. However, the deployment
of each individual system will depend on the
type of accident determined by the control sys-
tem in the initial stages of the collision (head-
on collision or side impact) and the severity of
the accident (in particular, the vehicle's rate of
deceleration or acceleration).
The rate of vehicle deceleration or acceler-
ation and the direction of the force are ba-
sically determined by:
I the distribution of forces during the col-
lision
I
the collision angle
I the deformation characteristics of the
vehicle
I the characteristics of the object with
which the vehicle has collided, e.g. the
other vehicle
Factors which can only be seen and meas-
ured after the collision has taken place do
not play a decisive role in the deployment
of an airbag, nor do they provide an indica-
tion of it.
The vehicle may be considerably deformed
without an airbag being deployed if, for ex-
ample, only relatively easily deformable
parts such as the bonnet or wings have
Safety
Occupant safety
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