Mercedes-Benz GLS 2023, Operator'S Manual

Page: 41 / 538

Restraint system functionality
When the vehicle is switched on, a self-test is per-
formed, during which the restraint system warning
lamp
6
lights up. It goes out no later than a
few seconds after the vehicle is started. The com-
ponents of the restraint system are then func-
tional.
Malfunctioning restraint system
A malfunction has occurred in the restraint sys-
tem if:
R
The
6
restraint system warning lamp does
not light up when the vehicle is switched on
R
The
6
restraint system warning lamp lights
up continuously or repeatedly during a journey
&
WARNING Risk of injury due to malfunc-
tions in the restraint system
Components in the restraint system may be
activated unintentionally or not deploy as plan-
ned in an accident.
#
Have the restraint system checked and
repaired immediately at a qualified spe-
cialist workshop.
Function of the restraint system in an accident
How the restraint system works depends on the
severity of the impact detected and the apparent
type of accident:
R
Frontal impact
R
Rear impact
R
Side impact
R
Rollover
The activation thresholds for the components of
the restraint system are determined based on the
evaluation of the sensor values measured at vari-
ous points in the vehicle. This process is pre-emp-
tive in nature. The restraint system components
must be triggered/deployed in good time at the
start of the collision.
Factors that can only be seen or measured after a
collision has occurred cannot play a decisive role
in air bag deployment. Nor do they provide an
indication of air bag deployment.
The vehicle may be deformed significantly without
an air bag being deployed. This is the case if only
parts that are relatively easily deformed are affec-
ted and the rate of vehicle deceleration is not
high. Conversely, an air bag may have been
deployed even though the vehicle has suffered
only minor deformation. If very rigid vehicle parts
such as longitudinal members are hit, for exam-
ple, this may result in sufficiently high levels of
vehicle deceleration.
Depending on the detected deployment situation,
the components of the restraint system can be
activated or deployed independently of one
another:
R
Emergency Tensioning Device: frontal impact,
rear impact, side impact, rollover
R
Driver's air bag, front passenger air bag: fron-
tal impact
R
Knee air bag: frontal impact
R
Side air bag: side impact
R
Window air bag: side impact, rollover, frontal
impact
Occupant safety 39