Mercedes-Benz E-Class Sedan Operator's Manual page 33

Restraint system functionality
When the ignition is switched on, a system self-
test is performed, during which the 6
restraint system warning lamp lights up. It goes
out no later than a few seconds after the vehicle
is started. The components of the restraint sys‐
tem are then functional.
Restraint system malfunction
The 6 restraint system warning lamp
R
does not light up when the ignition is
switched on.
The 6 restraint system warning lamp
R
lights up continuously or repeatedly during a
journey.
& WARNING Risk of injury or fatal injury
due to a malfunction in the restraint sys‐
tem
If the restraint system is malfunctioning,
restraint system components may be trig‐
gered unintentionally or might not be trig‐
gered at all in the event of an accident. This
may affect the Emergency Tensioning Device
or airbag, for example.
Have the restraint system checked and
#
repaired immediately at a qualified spe‐
cialist workshop.
Function of the restraint system in an acci‐
dent
How the restraint system works is determined by
the severity of the impact detected and the type
of accident anticipated:
Frontal impact
R
Rear impact
R
Side impact
R
Rollover
R
The activation thresholds for the components of
the restraint system are determined based on
the evaluation of the sensor values measured at
various points in the vehicle. This process is pre-
emptive in nature. The triggering/deployment of
the components of the restraint system must
take place right at the start of the collision.
Occupant safety
Factors which can only be seen and measured
after a collision has occurred cannot constitute
a reason for an air bag deployment. Neither do
they provide an indication of air bag deployment.
The vehicle may be deformed significantly with‐
out an air bag being deployed. This is the case if
only parts which are relatively easily deformed
are affected and the rate of vehicle deceleration
is not high. Conversely, an air bag may have
been deployed even though the vehicle only suf‐
fered minor deformation. If very rigid vehicle
parts such as longitudinal members are hit, for
example, this may result in sufficiently high lev‐
els of vehicle deceleration.
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