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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:
Sit correctly (
page 40).
/
R
Fasten the seat belt correctly (
/
R
Function of the seat belt warning lamp
-
(
page 43).
/
The 6 restraint system warning lamp is not
R
lit up after the self-test (
page 42).
/
The PASSENGER AIR BAG indicator lamps dis-
R
play the correct status of the front passenger
air bag (
page 43).
/
Depending on the detected deployment situation,
the components of the restraint system can be
activated or deployed independently of each
other:
Emergency Tensioning Device: frontal impact,
R
rear impact, side impact, rollover
Driver's air bag, front passenger air bag: fron-
R
tal impact
Knee bag: frontal impact
R
Side impact air bag: side impact
R
Window curtain air bag: side impact, rollover,
R
frontal impact
The installation location of an air bag is identified
by the AIRBAG symbol (
page 41).
Observe the information on the function of the
restraint system (
/
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 49).
/
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-
Occupant safety – Purpose and function of the restraint system
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 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
page 54).
/
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
page 49).
not high. Conversely, an air bag may be deployed
even though the vehicle suffers only minor defor-
mation. If very rigid vehicle parts such as longitu-
dinal members are hit, this may result in suffi-
ciently high levels of vehicle deceleration.
Depending on the apparent type of accident and
the detected deployment situation, Emergency
Tensioning Devices and/or air bags can supple-
ment the protection offered by a correctly worn
seat belt.
When enabled, an air bag can provide additional
protection for the respective vehicle occupant.
49
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