Purpose and function of the restraint system
Overview of deployment situations (restraint sys-
tem)
Make sure that the following prerequisites in par-
ticular have been met so that the components of
the restraint system are able to provide the inten-
ded level of protection:
R
Sit correctly (/ page 41).
R
Fasten the seat belt correctly (/ page 42).
-
Function of the seat belt warning lamp
(/ page 44).
-
Function of the rear seat belt status dis-
play (/ page 44).
R
The 6 restraint system warning lamp is not
lit up aer the self-test (/ page 43).
R
The PASSENGER AIR BAG indicator lamps dis-
play the correct status of the front passenger
air bag (/ page 45).
Depending on the detected deployment situation,
the components of the restraint system can be
activated or deployed independently of each
other:
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 bag: frontal impact
R
Side impact air bag: side impact
R
Window curtain air bag: side impact, rollover,
frontal impact
R
PRE-SAFE
®
Impulse Side: side impact
The installation location of an air bag is identied
by the AIRBAG symbol (/ page 56).
Observe the information on the function of the
restraint system (/ page 51).
Information on how the restraint system works
How the restraint system functions depends on
the severity of the impact detected and the appa-
rent type of accident.
For more information about types of accidents,
see "Overview of deployment situations"
(/ page 51).
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 triggering/deployment of the
components of the restraint system must take
place in good time at the start of the collision.
Factors that can be seen and measured only aer
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 signicantly without
an air bag being deployed. This is the case if only
parts which are relatively easily deformed are
aected and the rate of vehicle deceleration is
not high. Conversely, an air bag may be deployed
even though the vehicle suers only minor defor-
mation. If very rigid vehicle parts such as longitu-
dinal members are hit, this may result in su-
ciently high levels of vehicle deceleration.
Occupant safety – Purpose and function of the restraint system
51
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