2009 AUDI S4 CABRIOLET instrument panel

Airbag system -----------------=~-
& WARNING (continued)
• If you must install a rearward facing child safety seat on the
front passenger seat because of exceptional circumstances and
the PASSENGER AIR BAG OFF light does not come on and stay on,
immediately install the rear -facing child safety seat in a rear
seating position and have the airbag system inspected by your
Audi dealer.
_& WARNING
If, in exceptional circumstances, you must install a forward-facing
child restraint on the front passenger's seat:
• Always make sure the forward-facing seat has been designed
and certified by its manufacturer for use on a front seat with a
passenger front and side airbag .
• Never put the forward-facing child restraint up against or very
near the instrument panel.
• Always move the passenger seat into its rearmost position in
the seat's fore and aft adjustment range, as far away from the
airbag as possible, before installing the forward-facing child
restraint. The backrest must be adjusted to an upright position.
• Make sure that the PASSENGER AIR BAG OFF light comes on
and stays on all the time whenever the ignition is switched on. •
Advanced Airbag System components
The front passenger seat in your vehicle has a lot of very important
parts of the Advanced Airbag System in it. These parts include the
weight-sensing mat, sensors, wiring, brackets, and more. The func­
tion of the system in the front passenger seat is checked by the elec­
tronic control unit when the ignition is on. The control unit monitors
the Advanced Airbag System and turns the airbag indicator light on
when a malfunction in the system components is detected. The
function of the airbag indicator light is described in greater detail
Controls and equip­ ment Safety first Vehicle operation
below.
Because the front passenger seat contains important parts
of the Advanced Airbag System, you must take care to prevent it
from being damaged. Damage to the seat may prevent the
Advanced Airbag for the front passenger seat from doing its job in
a crash.
The front Advanced Airbag System consists of the
following:
• Crash sensors in the front of the vehicle that measure vehicle
acceleration/deceleration to provide information to the Advanced
Airbag System about the severity of the crash.
• An electronic control unit, with integrated crash sensors for front
and side impacts. The control unit "decides" whether to fire the
front airbags based on the information received from the crash sensors. The control unit also "decides" whether the safety belt
pretensioners should be activated.
• An Advanced Airbag with gas generator for the driver inside the
steering wheel hub.
• An Advanced Airbag with gas generator inside the instrument
panel for the front passenger .
• A weight-sensing mat under the upholstery padding of the front
passenger seat cushion that measures the total weight on the seat.
The information registered is sent continuously to the electronic
control unit to regulate deployment of the front Advanced Airbag on
the passenger side.
• An airbag monitoring system and indicator light in the instru ­
ment cluster ~
page 179.
• The PASSENGER AIR BAG OFF light comes on and stays on in the
center of the instrument panel~
page 180, fig. 174 and tells you
when the front Advanced Airbag on the passenger side has been
turned off .
• A sensor below the safety belt latch for the front seat passenger
to measure the tension on the safety belt. The tension on the safety
belt and the weight registered by the weight -sensing mat help the
control unit "decide" whether the front airbag for the front _,.
Vehicle care Do-it-yourself service Technical data

__ __::_A:::..:..:. ir..::b ~ a::. g::!...: s:::L y..::s :.::t :.::e :.:.m.:..:.... ________________________________________________ _
or the lower parts of t he body. Front airbags on ly supp lement the
th ree p oint safe ty belts in s ome front al c olli sio ns in which the
vehic le dece leration is high enou gh to deploy th e airbags .
Front airbags will not deploy:
• if the ignition is switched off when a crash occ urs,
• i n sid e coll is ions ,
• i n rea r- e nd collisi ons ,
• in rollovers,
• when th e c ras h de cele rat io n measu red by th e airba g sys tem is
l ess than the minimum threshold needed for a irbag deplo yment as
r egi stere d by t he ele ctr onic con trol unit.
The front passenger airbag will also not deploy :
• whe n t he fr ont pass enge r sea t is not occup ied,
• when the weight on the front passenger seat as sensed by the
A dvanced A ir b ag Sys te m in d ica tes th at the fr ont airba g on the
p assenge r side has to be t urned off b y the e lectronic cont rol unit
(t he
PASSENGER AIR BAG OFF ligh t com es o n an d stays o nl.
& WARNING
Sitting in the wrong posit ion can increase the risk of serious injury
in crashes .
• To reduce the risk of injury when the airbags inflate , the driver
and passengers must always sit in an upright position , must not
lean against or place any part of the ir body too close to the area
where the airbags are located.
• Occupants who are unbelted , out of posit ion or too close to the
airbag can be seriously injured by an airbag as it unfolds with
great force in the blink of an eye:::::,
page 170 .
& WARNING
A child in a rearward-facing child safety seat installed on the front
passenger seat will be seriously injured and can be killed if the
front airbag inflates - even with an Advanced Airbag System .
• The inflating airbag will hit the child safety seat or infant
carrier with great force and will smash the child safety seat and
child against the backrest , center arm rest , door or roof.
• Always install rear-facing child safety seats on the rear se at.
• If you must install a rearward facing child safety seat on the
front passenger seat because of exceptional circumstances and
the PASSENGER AIR BAG OFF light does not come on and stay on, i mmediately install the rear-facing child safety seat in a rear
seating position and have the airbag system inspected by your
Audi dealer .
& WARNING
Objects between you and the airbag will increase the risk of injury
in a crash by interfering with the way the airbag unfolds or by
being pushed into you as the airbag inflates .
• Never hold things in your hands or on your lap when the vehicle
is in use.
• Never transport items on or in the area of the front passenger
seat. Objects could move into the area of the front airbags during
braking or other sudden maneuver and become dangerous projec ­
tiles that can cause serious personal injury if the airbags inflate .
• Never place or attach accessories or other objects (such as cup
holders , telephone brackets , large, heavy or bulky obje cts) on the
doors , over or near the area marked "AIRBAG" on the steering
wheel, instrument panel , seat backrests or between those areas
and yourself . These objects could cause injury in a crash, espe­
cially when the airbags inflate .
• Never recline the front passenger's seat to transport objects .
Items can also move into the area of the side airbag or the front ..,

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PASSENGER AIR BAG OFF light
............. Fig. 174 Section from
the instrument panel:
PASSENGER AIR BAG
OFF light
The PASSENGER AIR BAG OFF light is located in the center of the
instrument panel
~ fig. 174.
The
PASSENGER AIR BAG OFF light will come on and stay on to tell
you when the front Advanced Airbag on the passenger side has
been turned off by the electronic control unit . Each time you turn on
the ignition , the
PASSENGER AIR BAG OFF light will flash for a few
seconds and :
• will stay on if the front passenger seat is not occupied,
• will stay on if there is a small child or child restraint on the front
passenger seat,
• will go out if the front passenger seat is occupied by an adult as
registered by the weight -sensing mat .
The
PASSENGER AIR BAG OFF light must come on and stay on if the
ignition is on and
• a car bed has been installed on the front seat, or
• a rearward-facing child restraint has been installed on the front
passenger seat, or
• a forward-facing child restraint has been installed on the front
passenger seat, or
• the weight registered on the front passenger seat is equal to or
less than the combined weight of a typical 1 year-old restrained in one of the rear-facing or forward-facing infant restraints
listed in
Federal Motor Vehicle Safety Standard 208 with which the Advanced
Airbag System in your vehicle was certified .
If the front passenger seat is not occupied, the front airbag will not
deploy, and the
PASSENGER AIR BAG OFF light will stay on. Never
install a rearward -facing child restraint on the front passenger seat,
the safest place for a child in any kind of child restraint is at one of
the seating positions on the rear seat~
page 170, "Child restraints
on the front seat- some important things to know" and~
page 190,
"Child Safety".
If the PASSENGER AIR BAG OFF light comes on when one of the
conditions listed above is met, be sure to check the light regularly
to make certain that the
PASSENGER AIR BAG OFF light stays on
continuously whenever the ignition is on. If the
PASSENGER AIR
BAG OFF
light does not appear and not stay on all the time, stop as
soon as it is safe to do so and
• reactivate the system by turning the ignition off and then turning
it on again;
• remove and reinstall the child restraint. Make sure that the child
restraint is properly installed and that the safety belt for the front
passenger seat has been correctly routed around the child restraint
as described in the child restraint manufacturer's instructions;
• make sure that the convertible locking feature on the safety belt
for the front passenger seat has been activated and that the safety
belt has been pulled tight . The belt must not be loose or have loops
of slack so that the sensor below the safety belt latch on the seat can
do its job
~ page 200.
• make sure that things that may increase the weight of the child
and child safety seat are not being transported on the front
passenger seat;
• make sure that the safety belt tension sensor is not blocked.
Shake the safety belt latch on the front passenger seat back and
forth;
• If a strap or tether is being used to tie the child safety seat to the
front passenger seat, make sure that it is not so tight that it causes _,,

__________________________________________________ A_ i_ r _b _a...; g::- s_ y=--- s_t _e _m ___ ffllll
the weight -sensing mat to measure more weight than is actually on
the seat .
If the PA SSENGER AIR BAG OFF light still d oes not come on and does
not stay on continuously (when the ignition is switched on),
• take the child restraint off the front passenger seat and insta ll it
properly at one of the rear seat positions. Have the airbag system
inspec ted by your Audi dea ler immediately .
• move the child to a rear seat position and make sure that the
child is proper ly restrained i n a child restraint that is appropriate for
its size and age.
The
PASSENGER AIR BAG OFF light shou ld NOT come on when the
ignition is on and an adult is sitting in a proper seating position on
the front passenger seat . If the
PASSENGER AIR BAG OF F light
comes on and stays on or flashes for about 5 seconds whi le driving,
under these circumstances, make sure that:
• the adult on the front passenger seat is properly seated on the
center of the seat cushion with his or her back up against the back­
rest and the back rest is not reclined => page 148, "Pro per occupant
seating positions",
• the adult is not taking weight off the sea t by ho lding o n to the
passenger assist handle above the front passenger door or
suppo rting thei r weight on the armrest,
• the safety belt is being proper ly worn and that there is not a lot
of slack in the safety bel t webbing,
• accessory seat covers or cushions or other things that may cause
an incorrect reading or impression on the weight -sensing mat
under the upho lstery of the seat have been removed from the front
passenger seat,
• a safety belt extender has not been left in the safety be lt latch for
t he front passenger seat .
In addition to the
PASSENGER AIR BAG OFF l ight in the center of the
instr ument panel, the message
PASSENGER AIR BAG OFF or
PAS SENGER AIR BAG ON wi ll briefly appear in the instrument c luster
Controls and equip­ ment Safety first
Vehicle operation display. This is to inform the driver of the current front passenger
a
ir b ag status .•
Important safety instructions on monitoring
the Advanced Airbag System
& WARNING
An airbag system that is not fun ctioning properly cannot provide
supplemental protection in a frontal cra sh .
• If the airbag ind icator li ght come s on , it means that there may
be something wrong with the Advan ced Airbag System . It is
possible that the airbag will inflate when it is not suppo sed to , or
will not inflate when it should .
• Ha ve the airb ag system inspected immedi ately by your Audi
dealer.
& WARNING
If the front airbag inflate s, a child witho ut a child restraint , in a
rearward-facing child safety seat or i n a forward -fa cing child
restr aint that has not been properly installed will be seriously
injured and can be killed .
• Even though your vehicle is equipped with an Advanced Airbag
Sy stem , make certain that all children , e speci ally 12 year s and
younger , always ride on the back seat p roperly re strained for their
age and size .
• Always install forward or rear -facing child safety seat s on the
re ar s eat - even with an Ad van ced Airb ag Sy stem .
• If you mu st install a rearward -fa cing child safety seat on the
front pa ssenger seat be cau se of ex ceptional cir cum stance s and
the PASSENGER AIR BAG OFF light does not appear and stay on ,
immediately in stall the rear -facing child safety seat in a rear ...
Vehicle care Do-it-yourself service Technical data

___ A_ ir_b _ a_ g~ s_ y_s _t _e _m _________________________________________________ _
& WARN IN G (c ontinu ed )
seating posit ion and ha ve the airb ag system inspected by your
Audi dealer .
• A t ight tether or other strap on a rearward-fa cing child restr aint
atta ched to the front pas senger se at can put too much pres sure
on the weight-sensing mat in the seat and reg ister more weight
than i s actually on the seat. The heavier weight registered can
make the system work as though an adult were on the seat and
deploy the Advanced Airbag when it must be suppre ssed causing
serious or even fatal injury to the child .
• If, in exc eptional cir cum stance s, you mu st in stall a forward ­
facing child restraint on the front passenger seat , always move the
seat into its rearmost po sition in the seat's fore and aft adjust ­
ment range , as far away from the airbag as possible . The ba ckrest
must be adjusted to an upright position. Make sure that the
PASSENGER AIR BAG OFF light comes on and stays on all the time
whenever the ignition is switched on .
& WARNING
• If the PASSENGER AIR BAG OFF light does not go out when an
adult is sitting on the front passenger seat after taking the steps
described above, make sure the adult i s properly seated and
restrained at one of the rear seating position s.
• Have the airbag system inspected by your Audi dealer before
transpo rting anyone on the front passenger seat .
[ i ] Tips
If the weight -sensing mat in the front passenger seat detects an
e m pty seat , the fron t airbag on the passenge r side will be tu rned
off, and PASSENGER AIR BAG OFF will stay on.•
Repair, care and disposal of the airbags
P arts of the airbag system are installed at many different p laces on
your Au di. Insta lli ng, removing, se rvic ing or repa iring a par t in an
area of the vehicle can damage a part of an airbag system and
p revent that system from w orking properly in a c ollisi on.
There are some important things you have to know to make sure
that the effectiveness of the system will not be impai red and that
discarded componen ts do no t cause injury or po llute t he e nv iro n­
ment .
& WARNING
Improper care , servicing and repair procedures can increase the
risk of personal injury and death by preventing an airbag from
deploying when needed or deploying an airbag unexpectedly:
• Never cover , obstruct , or change the steering wheel horn pad
or airbag cover or the instrument panel or modify them in any way .
• Never attach any objects su ch as cup holders or telephone
mountings to the surfa ces covering the airbag units .
• For cleaning the horn pad or instrument panel , use only a soft ,
dry cloth or one moistened with plain water. Solvents or cleaner s
c ould damage the airbag cover or change the st iffness or strength
of the material so that the airbag cannot deploy and protect prop­
erly .
• Never repair , adju st, or change any parts of the airbag sy stem .
• All work on the steering wheel , instrument panel, front seats or
electrical system (including the installation of audio equipment ,
cellular telephones and CB rad ios , etc .I must be performed by a
qualified technician who has the training and special equipment
necessary .
• For any work on the airbag system, we strongly recommend
that you see your author ized Audi dealer or qualified workshop .
• Never modify the front bumper or parts of the vehicle body .

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& WARNING
Item s s to red betwe en th e safe ty belt b uckle a nd th e cente r
co nso le can c au se the sen sors in the buc kle to send the wro ng
inf orm ation t o the e lec tronic c ontrol m odule and pre vent th e
Adv anced Airb ag System fr om working pr operly .
• Always make su re that n oth ing ca n int erfere with the saf ety
belt buckle s and that they ar e not ob structed.
<£> For the sake of the environment
Undeployed airbag modules and pretensioners might be c lassified
as Perchlorate Material -specia l handling may apply, see
www .dtsc.ca .gov/hazardouswaste/perchlorate. When the vehicle o r
parts of the restraint system including airbag modules safety be lts
with pretensioners are scrapped, all applicable laws and regula ­
tions must be observed . Your author ized Audi dealer is fami liar with
these requirements and we recommend that you have your dea ler
perform th is service for you. •
Knee airbags
Description of knee airbags
The airbag system can pr ovide supplemental protection
t o properly restrained fron t se at occu pants.
Fi g. 175 Dr iver's
ai rba g
The airbag for the driver is located in the instrument panel under ­
neath the steering wheel=> fig. 175, the airbag for the passenger is
at about the same height in the instrument panel underneath the
g love compartment.
The knee airbag offers additional protection to the driver 's and
passenger's knees and upper and lower thigh areas as a supple­
ment to the safety be lts.
If the front airbags deploy, the knee airbags also deploy in frontal
coll isions above a certain severity=>
page 177, "More important
things to know about front airbags".
Besides their normal safety function, safety be lts work to help keep
the driver or front passenger in position in case of a frontal collision
so that the airbags can provide protection.
The airbag system is not a substitute for your safety belt. Rather, it is part of the overall occupant restraint system in your vehicle.
Always remember that the airbag system can only help to protect
you if you are wearing your safety belt and wearing it properly. This
~

-Airbag system ----=--=---------------------------------
If the front airbags d ep loy, the kne e airbags a lso d ep loy in frontal
c oll is ions abov e a certai n s ev er ity.
Whe n the syst em is dep loy ed, the airba gs start to f ill with a prope l­
l ant gas, and inf late bet ween t he lower pa rt of the instr ument pa ne l
and the drive r and the l ower part of th e instru ment pane l a nd th e
front passenge r:::;, page
177 , fig. 173 .
A lth oug h the y are no t a s oft p illow, t hey can "cushion" th e im pact
and in this way they can help to r educe the ris k of injury to the lower
e xt remitie s.
A ll thi s takes place ins ta nta ne ous ly, so fast tha t many p eople don't
even realize that the airbags have deployed. The ai rbags a lso inf late
w it h a gre at d eal o f f orce and it is im por tant for occupa nt safety t hat
nothing sho uld be in their way when they dep loy.
Full y infla ted ai rbags i n co mbina tion wi th properl y w orn safe ty bel ts
s low down and limit the occupant's forward movement and he lp to
r e du ce t he risk .•
Important safety instructions on the knee
airbag system
Air bag s are only sup plemen tal restra ints. Alwa ys wea r
s af ety bel ts co rr e ctly and ride i n a prop er se atin g po sition .
Ther e is a lo t that you and your passe ngers must know a nd do to
he lp the safety belts and airbags to provide supp lemental protec ­
ti on .
& WARNING
An inflating knee airbag can cause serious injury. Wearing safety
belts incorrectly and improper seating positions increase the risk
of serious personal injury and death whenever a vehicle is being
used .
• The airbag system cannot protect you properly if you are
seated too close to any of the airbag locations . When adjusting
& WARNING (continued )
their seat positions, it is important that both the driver and the
front passenger keep their upper bodies and knees at the
following minimum safe d istances :
-1 O inches (25 cm) between the chest and the steering
wheel /instrument panel .
- 4 inches (10 cm) between the knees and the lower part of the
instrument panel.
• The risk of personal injury increases if you lean forward or to
the side, or if the seat is improperly positioned and you are not
wearing your safety belt. The r isk increases even more should the
airbag deploy .
• Always make sure that the knee airbag can inflate without
interference. Objects between yourself and the airbag can
increase the risk of injury in an accident by interfering with the
way the airbag deploys or by being pushed into you as the airbag
deploys.
-No persons (children) or animals should ride in the footwell
in front of the passenger seat . If the airbag deploys, this can
result in serious or fatal injuries.
- No objects of any kind should be carried in the footwell area
in front of the driver's or passenger's seat. Bulky objects (shop­
ping bags , for example) can hamper or prevent proper deploy ­
ment of the airbag . Small objects can be thrown through the
vehicle if the airbag deploys and injure you or your passengers .
• Make sure there are no cracks , deep scratches or other damage
in the area of the instrument panel where the knee airbags are
located .
• If children are incorrectly seated , their risk of injury increases in
the case of an accident:::;,
page 190, "Child Safety". •

--------------------------------------------~C~ h~ il~d ~S~ a~f e~ t~ YL _III
& WA RNIN G (conti nu ed )
• Alway s install rear-facing child safety se ats on the rear seat.
• If you mu st in stall a rearw ard f acing chi ld safety seat on the
front pa ssenger seat in exc eptional cir cum stance s and the
PA SSENGER AIR BAG OFF light do es not come on and stay on,
im medi ate ly install the re ar-fa cing child safety s eat in a rear
s e ating po sit ion and h ave the airb ag sys tem inspe cted im medi ­
ately by your Audi de aler .
& WARNING
If, in exceptional circum stance s, you must in stall a forward -facing
c hild re st ra int on the fr ont p ass eng er' s s eat :
• Alway s make sure the forward -facing seat ha s been de signed
and cert ified by it s manufa cturer f or use on a front se at with a
p ass enger front and side airbag .
• Always follow the m anufacturer's instruct ions provided with
the child safety seat or carrier.
• Alway s m ove the pa ss e nger sea t into its rearm ost p osit ion in
the seat' s fo re and aft adju stment r ange , as far away from the
a irb ag as possib le before installing the child r estr aint . The b ack­
rest mu st be adju sted to an upr ight po sition.
• Alw ays ma ke sure th at the PAS SENGER AIR BAG OFF light
c ome s on and stay s on all the time whenever the ignition i s
s witched on . •
Advanced front airbag system and children
Your vehicle is equipped with an "Advanced Airbag System" in
compliance with United States Federal Motor Vehicle Sa fety Stan ­
dard (FMVSS) 208 as applicab le at the time your vehicle was manu ­
factured .
Controls and equip­
ment Safety first Vehicle operation
The Advanced Airbag system in your vehicle has been certified to
meet the " low -risk" requirements for 3 and 6 yea r- old child ren on
the passenger side and small adu lts on the driver side. The low risk
deployment c rite ria are intended to reduce the risk of injury th rough
interaction with the airbag that can occur, for example, by being too
close to the steering whee l and instrument panel when the airbag
in flates . In add ition, the system has been cert ified to comply with
the "suppression" requirements of the Safety Standard, to turn off
the front airbag for infants up to 12 months who are restrained on
the front passenger seat in child restraints that are listed in the
Standard.
Even though your vehic le is equipped with an Advanced Airbag
system, all ch ildren, especially those 12 years and younger, should
a lways ride in the back seat proper ly restrained for the ir age and
s ize . The a irbag on the passenger side makes the front seat a poten­
tially dangerous p lace for a chi ld to r ide. The front seat is not the
safest place for a chi ld in a forward -facing child safety seat. It can be
a very dangerous place for an infant or a larger chi ld in a rearward ­
facing seat. •
Advanced Airbags and the weight-sensing
mat in the front seat
The Advanced Airbag System in your vehicle detects the p resence
of an infant or chi ld in a chi ld restraint on the front passenger seat
using the weight -sensing mat in the seat cushion and the sensor
below the safety belt latch on the front passenger seat that
measures the tension on the safety belt .
The weight -sensing mat measures t otal weight of the ch ild and the
child safety seat and a chi ld blanket on the front passenger seat. The
weight on the front passenge r seat is related to the design of the
child restraint and its "footprint", the size and shape of the bottom
of the child restraint as it sits on the seat. The weight of a child
restraint and its "footprint" vary for different kinds of child .,
Vehicle care Do-it-yourself service Technical data