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and to have any malfunctioningair bags
repaired. This will help to makesure theair bags
continue to perform their protective function for
thevehicle occupantsinthe eventofacrash.
G
WARNING
EmergencyTensioning Devices that have
deployed pyrotechnically are no longer opera-
tional and are unabletoperform their inten-
ded protective function.This posesan
increased risk of injury or even fatal injury.
Havepyrotechnically triggered Emergency
Tensioning Devices replaced immediately at a
qualified specialist workshop.
If EmergencyTensioning Devices are triggered
or air bags are deployed, you will hear abang,
and asmall amountofpowder may also be
released. The 6 restraint system warning
lamp lightsup.
Only in rarecases will thebang affect your hear-
ing.The powder that is released generally does
notconstituteahealthhazard, but it may cause
short-term breathingdifficulties in peoplewith
asthma or other respiratory problems.Provided
it is safe to do so, you shouldleave thevehicle
immediately or open thewindow in ordertopre-
ventbreathingdifficulties.
Air bags and pyrotechnic EmergencyTensioning
Devices (ETDs)contain perchlorate material,
whichmay require special handlingand regard
for theenvironment. National guidelines must
be observed duringdisposal. In California, see
www.dtsc.ca.gov/HazardousWaste/
Perchlorate/index.cfm.
Method of operation
During thefirst stage of acollision,the restraint
system control unit evaluates important physi-
cal datarelating to vehicle decelerationoraccel-
eration,suchas:
R
duration
R
direction
R
intensity
Based on theevaluation of this data, the
restraint system control unit triggersthe Emer-
gency Tensioning Devices duringafrontal or
rear collision.
An EmergencyTensioning Devicecan only be
triggered, if:
R
theignition is switched on
R
thecomponentsofthe restraint system are
operational. You can findfurther information
under: "Restraintsystem warning lamp"
(
Y page 40)
R
theseat belt buckle tongue has engaged in
thebelt buckle of therespectivefront seat
The EmergencyTensioning Devices in therear
compartmentare triggered independently of the
lockstatus of theseat belts.
If therestraint system control unit detectsa
moresevere accident, further componentsof
therestraint system are activated independ-
ently of each other in certain frontal collision
situations:
R
Frontair bags as well as driver'sand front-
passenger knee bags
R
Window curtain air bag, if thesystem deter-
mines that deploymentcan offer additional
protection to that provided by theseat belt
The front-passenger frontair bag is activated or
deactivateddependingont
he person on th
e
front-passenger seat.The front-passenger front
air bag can only deployinanaccidentifthe
PASSENGER AIRBAG OFFindicator lamp is off.
Observethe informationonthe PASSENGER AIR
BAGindicator lamps (
Y page 40).
Your vehicle has two-stagefront air bags. During
thefirst deploymentstage, thefront air bag is
filledwith propellantgas to reducethe risk of
injuries.The frontair bag is fully deployed with
themaximum amountofpropellantgas if asec-
onddeploymentthreshold is reached within a
few milliseconds.
The activation threshold of theEmergencyTen-
sioning Devices and theair bag are determined
by evaluating therateofvehicle decelerationor
accelerationwhichoccurs at various points in
thevehicle.This process is pre-emptive in
nature. Deployment shouldtakeplace in good
timeatthe start of thecollision.
The rateofvehicle decelerationoracceleration
and thedirection of theforce are essentially
determinedby:
R
thedistribution of forces duringthe collision
R
thecollision angle
R
thedeformationcharacteristics of thevehicle
R
thecharacteristics of theobject with which
thevehicle has collided
52
Occupant safety
Safety
54


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