ignition AUDI S4 2018 Workshop Manual

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about children and Advanced Airbags
¢page 295 .
Even though yo ur vehicle is equipped with an Ad­
vanced Airbag System, make certain that all chil­
dren, especially those 12 years and younger,
a l­
ways ride in the back seat properly restrained for
their age and size. The airbag on the passenger
side makes the front seat a potentially dangerous
place for a child to ride. The front seat is not the
safest place for a child in a forward-facing child
safety seat .
It can be a very dangerous place for
a n infant or a child in a rearward-fac ing seat.
The Advanced Airbag System in your veh icle has
been certified to comply with the requirements
of United States Federal Motor Vehicle Safety
Standa rd (FMVSS) 208, as well as Canada Motor
Veh icle Safety Standa rd (CMVSS) 208 as applica­
b le a t the time your veh icle was m an ufact ured.
Accord ing to requirements, the front Advanced
Airbag System on the passenger side has been
certified for "suppression" for infants of about 12 month old and younger and for "low risk
de­
ployment" for children aged 3 to 6 years old (as
defined in the standard) .
The
PASSENGER AIR BAG O FF ~ ; light in the
headliner tells you when the front Advanced Air­
bag on the passenger side has been turned off by
the electronic control unit.
Each time yo u turn on the ignition, the
PASSEN ­
GER AIR BAG OFF
~; ON @ light will come on
for a few seconds and:
- PASSENGER AIR BAG OFF ~; will come on if
the front passenger seat is not occupied
- PASSENGER AIR BAG OFF ~; will come on if
the e lectrica l capacitance measured by the
ca­
pacitive passenger detection system for the
front passenger seat equa ls the comb ined
ca­
pacitance of an infant up to about one year of
age and one of the rearward-facing or forward ­
facing child restra ints listed i n Federa l Moto r
Vehicle Safety Standard ( FMVSS) 208 with
wh ich the Advanced Airbag System i n your veh i­
cl e was certified . Fo r a listing of the child
re ­
straints that were used to ce rtify you r vehicle 's
compliance with the Safety Standard
¢ page 297 .
Airb ag sys tem
-PAS SENGER AIR BAG OFF ~; will come on if
there is a small chi ld or child restraint on the
front passenger seat
- PASSENGER AIR BAG ON @ will come on if the
front passenger seat is occupied by an ad ult as
registered by the capacit ive passenger detec­
tion system
¢ page 283, Monitoring the Ad­
vanced Airbag System .
The PASSENGER AIR BAG OFF ~; light comes on
when e lectrical capacitance registered on the
front passenger seat is equal to or less than the
combined capacitance of a typical 1 year-old
in­
fant and one of the rearward-facing or forward ­
facing child restrai nts listed in Federal Motor Ve­
hicle Safety Standard ( FMVSS) 208 with wh ich
the Advan ced Airbag System in yo ur vehicle was
ce rtified.
If the total electr ical capacitance reg istered on
t h e front passenger seat is mo re than that of a
typ ical 1 year -old ch ild but less than the weight
of a sm all adult, the front air bag on the passen­
ger side can deploy (the
PASSENGER AIR BAG
OFF ~; light does not come on) .
If the
PASSENGER AIR BAG OFF ~; light does
not come on, the front airbag on the p assenger
s ide has not been turned off by the electronic
contro l unit and can deploy if the contro l unit
senses an impact that meets the conditions stor­
ed in its memory.
For example , the airbag may deploy if :
-a small c hild that is heav ier than a typ ica l 1
year -o ld child is on the front passenger se at
(regardless o f whethe r the child is in one o f the
child sa fe ty seats listed
¢ page 29 7), o r
- a child who has outgrown c hild rest raints is on
t he front passenge r seat .
If the front passenge r airbag is t urned off, the
PASSENGER AIR BAG OFF ~; light comes on i n
t h e headliner a nd stays o n.
If the front passenger a irbag deploys, the Feder­
al Standard requi res the airbag to meet the "low
r isk " dep loymen t criteria to redu ce the r isk of
in­
j u ry through interaction w it h t he airbag. "Low
risk" deployment oc curs in those crashes that
take place at lowe r decelerations as defined in
Ill>
273

- You will also receive serious injuries and
could even be killed if you are up aga inst the
airbag or too close to it when it inflates
-
even with an Advanced Airbag 9page 271.
More important things to know about front
airbags
F ig. 2 40 Inflated front a irbags
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-.a ;z
Safety belts are important to help keep front
seat occupants in the proper seated position so
that airbags can unfold properly and provide sup­ p lemental protection in a frontal collision.
The front airbags are designed to provide addi­
tional protect ion for the chest and face of the
driver and the front seat passenger when:
- safety belts are worn properly
- the seats have been positioned so that the
oc-
cupant is properly seated as far as possible
from the airbag
- and the head restraints have been properly ad-
justed
Because airbags inflate in the blink of an eye w ith
great force, things you have on your lap or have p laced on the seat could become dangerous pro­
jectiles, and be pushed into you if the airbag in­ flates .
When an airbag deploys, fine dust is released.
This is normal and is not caused by a fire in the
veh icle. This dust is made up mostly of a powder
used to lubricate the airbags as they deploy . It
could irr itate skin .
It is important to remember that while the sup­ plemental airbag system is designed to reduce
the likelihood of ser ious injuries, other injuries,
for example swelling, bruising and minor abra-
Airb ag sys tem
sions, can also happen when airbags inflate. Air­
bags do not protect the arms or the lower parts
of the body. Front airbags supp lement the three­
point safety belts only in some frontal collisions
in which the vehicle dece leration is high enough
to deploy the airbags .
Front airbags will not depl oy :
- if the ignition is switched off when a crash oc-
curs
- in side co llisions
- in rear-end coll isions
- in rollovers
- when the crash deceleration measured by the
ai rbag system is less than the m inimum thresh­
old needed for airbag dep loyment as registe red
by the electronic control un it
The front pass enge r airbag also w ill not
deploy:
- when the fron t passenger seat is not occupied,
- when the e lectr ical capacitance measured by
t he capacit ive passenger detection system for
the front passenge r seat ind icates that the pas­
senger side frontal airbag m ust be switched off
by the electronic control unit (the
PASSENGER
AIR BA G OFF
"1; light 9 page 283 comes on
and stays on).
_& WARNING
Sitting in the wrong position can increase the
risk of ser ious injury in crashes.
- To reduce the risk of injury when the a irbags
inflate, the driver and passengers must al­
ways sit in an upright posit ion, must not
lean aga inst or place any part of their body
too close to the area where the airbags are lo cated.
- Occupants who are unbelted, out of posit ion
or too close to the airbag can be serio usly
inj ured by an airbag as it unfolds wi th g reat
for ce in the blink of an eye
r:!>page 2 72.
_& WARNING
A child in a re arward-fa cing child safety seat
i nsta lled on t he front passenger sea t will be
serious ly in jured and can be ki lled if the front
Iii-
281

Monitoring the
Advanced Airbag System
Airbag monitoring indicator light
Two separate indicators monitor the fun ction of
the A dvanced Airbag System : the
El ligh t and
t he
PASSENGER AIR BAG OFF ~ ; ON @ Light.
The Advanced Airbag System as we ll as the side
a ir bags and side c urta in air bags with ejec tion
m it iga tion fea tures ( in cludi ng the e lectro nic con­
tro l uni t, sensors and sys tem wiring) are a ll
monitored co nti nu ously to ma ke sure that they
are funct ioning properly whenever the ignition is
on. Every t ime you turn on the ignition, the air ­
bag system ind icator
light E,lwill come on for a
few seconds (function check).
The system must be inspected when the
indicato r light
E,I:
- does not come on when the ignit ion is switched
on
- does not go out a few seconds after you have
switched on the ign ition, o r
- comes on w hile driving
If an airbag sys tem malf unct ion is de te cted, the
indicator light w ill come on to serve as a co nstant
remi nder to have the system inspected immedi­
ately .
If a mal function occurs that turns the front air­
bag on the passenger side off, the
PASSENGER
AIR BAG
OFF ~. lig ht w ill come o n an d stay on
whenever the ignit ion is on.
A WARNING
An airbag system that is not funct io ning prop­
erly cannot provide supplemental p rotection
in a frontal crash .
- If the airbag indicato r
light¢ page 32
comes whe n the vehicle is be ing used, have
th e sys te m in spect ed immed iate ly by yo ur
au tho riz ed Aud i deale r.
It is possible that
th e air bag will i nflate w hen it i s n ot su p­
p osed to, o r will not i nfla te whe n it shou ld.
Airbag system
PASSENGER AIR BAG OFF '1; ON @ light
Fi g. 241 Sect io n fro m th e headli ner: PASSENGE R AIR BAG
OFF~ ; ON @ lig ht
T he PASSENGER AIR BAG OFF ~; ON@ light is
located in t he
headliner ¢ fig. 241.
The PASSENGER AIR BAG OFF ~; light will come
o n and stay on to tell you w hen t he fro nt Ad­
van ced Air bag o n the p assenge r side has been
tu rned
off by t he e lec tron ic control unit . If the
bulb fo r the
PASSENGER AIR BAG OFF ~; ON@
light b urns o ut, t he a irbag ind icator light El w ill
come on to signal a ma lfunction in the Advanced
Airbag System. Altho ugh the burned-out b ulb
will not change the way the front passenger's
frontal a irbag works , it w ill no longer be possible
to use the
PASSENGER AIR BAG OFF ~; ON@
ligh t to make s ure that the airbag on/off s tatus is
c or rec t fo r th e o ccu pan t on the front passenge r
sea t. Have the airb ag system inspec ted immedi­
ate ly by yo ur au thorized A udi d ealer .
The PASSENGER AIR BAG OFF~; ON@ light
will blink for about S seconds when:
- the capacit ive passenger detection system,
which switc hes the front sea t passe nger's fron ­
tal Advanced Airbag o n and off, detects a
change in the st atus of the front pa sse nger
se at.
As soon as the
PASSENGER AIR BAG OFF ~; ON
@ light s tops blin kin g, a lways make sure that the
air bag st atus (on o r off) as shown by the ligh t is
prope r for the age, size and e lec trica l capacitance
of t he perso n occ up ying the front passenger
seat . Always ma ke sure that the safety be lt fo r
t h e front passenger seat is proper ly fastened .
The PASSENGER AIR BAG OFF~;/ PASSENGER
AIR BAG ON
@ light will show the statu s of the ..,.
283

Airbag syste m
front seat p assenge r's frontal Advanced Airbag.
Th e PAS SENGER AIR BAG
OFF ~; light:
-will come o n if the front pa ssenger seat is not
occupied;
- will come on if the e lectr ica l capacitance meas­
u red by the c apac itive passenger detec tion sys ­
tem for the front passenger seat equals the
combined capacitance of an infant up to about
one year of age and one of the rearward-facing
or forward-facing child rest raints listed in Fed­
eral Motor Vehicle Safety Standard 208 with
which the Advanced Ai rbag System in your veh i­
cle was certif ied; Fo r a listing of the child re­
straints that were used to cert ify your vehicle's
compliance with the U .S. Safety Standard
¢ page 297.
-will go out if the front passenger seat is occu­
pied by an adult as reg istered by the capacitive
passenger detection system.
- T he
PAS SENG ER AIR BAG OFF ~; light must
come on and s tay o n if the ignition is on and . ..
- a car bed has been insta lled on the front pas­
senger seat, o r
-a rearward-fac ing ch ild restrai nt has been in­
stalled on the front passenger seat , or
- a forward-facing child restra int has bee n in stal ­
led on the front passenger seat,
- and if the e lectrical capacitance registered on
the front passenger seat is equa l to or less than
the comb ined capac itance of a typical 1 year­
o ld infant and one of the rearward-fac ing o r
fo rward -fa cing chi ld restrain ts lis ted in Federal
Motor Veh icle Safety Standard 208 with w hich
the Advanced Airbag System in yo ur vehicle was
certified .
If th e fron t passe nger seat is no t occ upied, the
front ai rbag w ill not dep loy, and the
PASSENGER
AIR BAG
OFF ~; light wi ll stay on.
Never i nstall a rearward-facing child rest raint on
t he front passenge r sea t, the safes t place for a
chi ld in any k ind of child restraint is at one o f the
seating positions on the rea r seat ¢
page 2 72,
Child restraints on the front seot -some impor­
tant things to know
and ¢ page 295, Child safe ­
ty .
284
If the PASSENGER AIR BAG OFF ~; light
com es on ...
If the PASSENGER AIR BAG OFF ~; light comes
on when one of the condit ions listed above is
met, be sure to check the light regularly to make
certain t hat the
PASSENGER AIR BAG OFF ~;
light stays on cont inuously whenever the ign ition
i s on . If the
PASSENGER AIR BAG OFF ~; light
does not appear on and does not stay on all the
time, stop as soon as it is safe to do so a nd
- reactivate the system by tur ning the ignit ion
off for more than 4 seconds and then tur ning it
on
again;
- remove and re install the ch ild restraint. Make
sure that the child restra int is prope rly insta l­
led and that the safety belt for the front pas­
senge r sea t has bee n corre ct ly rou ted th rough
t he child restraint as desc ribed in the ch ild re­
straint man ufact urer's inst ruc tions;
- ma ke sure that the convert ible loc king retr ac­
to r on the safety belt for the front passenge r
seat has been activated and that the safety belt has been pulled tight .
- ma ke sure that no e lectrica l device (s uch as a
laptop , CD p layer , e lectronic games device,
power inverte r or seat heater for chi ld seats) is
placed or used on the front passenger seat if
the device is connected to the 12-volt socket or
the c igarette lighter socket;
- make sure that no seat heater has been retro­
fitted or otherw ise added to the front passen­
ger seat;
- make sure that noth ing can interfere with the
safety belt buckles and that they are not ob­
struc ted;
- make sure that there are no wet objects (such
as a wet towe l) and no water or other liquids on
the front passenger seat cushion .
If the PASSENGER AIR BAG OFF~; light still
does not come on ...
If the PASSENGER AIR BAG OFF~; light st ill
does not come on and does not stay on cont in u­
ous ly (when the ign ition is switched o n),
- take the child restra int off the front passenger
seat and install it properly at one of the rear
ll-

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seat positions. Have the airbag system inspect­
ed by your Audi dealer immediately .
- move the chi ld to a rear seat position and make
sure that the child is properly restrained in a
child restraint that is appropriate for its size
and age.
Th e PASSENGER AIR BAG OFF ~ ; light
s h ould NOT com e on ...
The PASS ENGER AI R BAG OFF ~ ; light should
NO T come on when the ignition is on and an
adult is sitting in a proper seating position on the
front passenger seat . If the
PASS ENGER AIR
BAG
O FF ~; light comes on and stays on while
driving, under these circumstances, make sure
that :
- the adult on the front passenger seat is proper­
ly seated on the center of the seat cushion with
his or he r back up aga inst the backrest and the
back rest is not reclined,
- the adult is not tak ing weight off the seat by
ho lding on to the passenger assist handle
above t he front passenger door or supporting
their we ight on the a.rm rest ,
-the safety belt is be ing properly worn and that
there is not a lot of slack in the safety belt web­
bing,
- there are no aftermarket seat covers or cush ­
ions or other things (such as blankets) on the
front passenger seat that migh t ca use the ca­
pacitive passenger detection system to miscal­
cu late electrical capacitance .
Important safety instructions on
monitoring the Advanced Airbag System
A WARNING
- If the status of the Adv a need A irbag System
has changed while the vehicle is moving, the
PASSENGER AIR BAG OFF ,;; ON @ light
blinks for about 5 seconds to catch the driv­
er's attention .
If this happens, always stop
as soon as it is safe to do so and check the
steps described above .
- If the
PASSENGER AIR BAG OFF ,;; light
does not go off when an adult who is not
very small is s itting on the front passenger
-
Airb ag sys tem
seat after taking the steps described above,
make sure the adu lt is properly seated and
restrained at one of the rear seating posi­
tions . Have the a irbag system inspected by
your author ized Audi dealer before trans­
port ing anyone on the front passenger seat.
A WARNING
f-
An a irbag system that is not functioning prop-
e rly cannot prov ide supplemental protect io n
i n a front al crash.
- I f the ai rbag ind icator light
~page 32
comes when the veh icle is being used, have
the system inspected immedia tely by your
authorized Audi dealer . It is possib le that
the airbag will inflate when it is not sup­
posed to, or will not inflate when it should.
A WARNING
If the front airbag inflates, a ch ild without a
chi ld restraint, or in a rearward-facing child
safety seat, or in a forward-fac ing child re­
stra int that has not been properly insta lled
will be seriously injured and can be killed.
- Even though your vehicle is equipped with
an Advanced A irbag System, make certain
that all children , espec ially 12 years and
younge r, always ride on the back seat p rop­
erly rest rained for the ir age and s ize .
- Always install fo rwa rd or rear-facing child
safety seats on the rear seat - even with an
Advan ced Airbag System.
- I f you must install a rea rwa rd-facing child
safety seat on the front passenger seat be­
cause of excep tional circums tances and the
PASSENGER AIR BAG OFF ,;, light does not
appear and stay on, immediate ly install the
rear-facing chi ld safety seat in a rear seat ing
position and have the a irbag system in­
spected by your authori zed Aud i dea ler.
- If, in exceptional circumstances, you must
install a forward-facing child restraint on
the front passenger seat, always move the seat into its rearmost position in the seat's
fore and aft ad justment range, as far away
from the a irbag as poss ible . The back rest
m ust be adjusted to an upr ight position .
285

Airbag syste m
Make sure that the PASSENGER AIR BAG
OFF
11;; li ght comes on and stays on all t he
t ime whenever the ignition is switched on.
A WARNING
- If the PA SSEN GER AIR BAG OFF 11;; light
does not go ou t when an adult is sitting on
the front passe nger seat a fte r ta king the
steps described above, make sure the adult is p roperly seated and restrained at one of
the rear seating positions.
- Have the airbag system inspected by your
authorized Aud i dealer before transporting
anyone on the front passenger seat.
@ Tips
If the capacitive passenger detection system
determines that the front passenger seat is
empty, the frontal airbag on the passenge r
side w ill be tu rned off, and the
PASSENGER
AIR BAG OFF
11;; light will stay on.
-
Repair , care and disposal of the airbags
Parts of the a irbag system are installed at many
different places on your Audi. Installing, remov­ ing, servic ing or repa iring a part in an area of the
ve hicle can damage a part of an airbag system
and prevent that system from working properly
i n a collision .
There are some important things you have to
know to make sure that the effectiveness of the
system w ill not be impaired and that discarded
components do not cause injury or pollute the
env ironment.
A WARNING
Improper care, serv icing and repai r proce­
dures can increase the r is k of personal injury
and death by preventing an airbag from de­
ploying when needed or dep loying an airbag
unexpectedly:
-
- Never cover, obstruct, or change the steer ­
ing wheel horn pad or airbag cover or the in­
strument pane l or modify them in any way.
286
- Never attach any objects s uch as c upholders
or telephone mountings to the surfaces cov­
ering the a irbag un its.
- For cleaning the horn pad or instrument
panel, use only a soft, dry cloth or one mois­
tened w ith plain water. Solvents or cleaners
could damage the airbag cover or change
the st iffness or strength of the material so
that the airbag cannot deploy and p rotect
properly.
- Never repair, adjust, or change any parts of
the airbag system.
- All work on the steering wheel, inst rument
panel, front seats or e lectr ica l system ( in­
cluding the installation of a udio eq uipment,
cellular telephones and C B radio s, etc.)
m ust be perfo rmed by a qualified techn ician
who has the training and specia l equipment
necessary.
- For any work on the airbag system, we strong ly recommend that you see your au­
thorized A udi dealer or qualified workshop.
- Never modify the front b umper or parts of
the vehicle body.
- Always make sure that the side a irbag can
inflate w ithout interference:
- Never install seat covers or replacement
u pholstery ove r the front seatbacks that
have not been specifically approved by
A udi.
- Never use additional seat cushions that
cover the areas where the side airbags in­
flate.
- Damage to the orig inal seat cove rs or to
the seam in the area of the s ide airbag
module mus t always be repaired immedi­
ate ly by an authori zed Au di dealer.
- The a irbag system can deploy on ly once. Af­
ter an airbag h as been deployed, i t m ust be
repla ced with new replacement parts de­
signed and approved espec ia lly for your
Audi model version . Replacement of com­
plete airbag systems or airbag components
must be perfo rmed by qua lified workshops
only. Make sure that any airbag service ac­
tion is entered in your A udi Warranty
&
Ma intenance boo klet under AIRBAG RE-
PLAC EM EN T RECORD.
~

Airbag system
In addition to their normal safety function, safe­
ty belts help keep the driver or front passenger in
position in a frontal collision so that the airbags
can provide supplemental protection.
The airbag system is not a substitute for your
safety belt. Rather, it is part of the overa ll occu­
pant restraint system in your vehicle. Always re­
member that the airbag system can only help to
protect you if you are wearing your safety belt
and wearing it properly . This is why you should
always wear your safety belt, not just because
the law requires you to do so ¢
page 263, Gener­
al information.
Remember too, airbags will deploy only once and
only in certain k inds of accidents - your safety
belts are always there to offer protection in those
accidents in which airbags are not supposed to
deploy or when they have already deployed, for
examp le when your vehicle str ikes or is struck by
another after the first collision .
This is jus t one of the reasons why an airbag is
not a substitute for the safety belt. The a irbag
system works most effectively when used with
the safety belts. Therefore, always wear your
safety belts correct ly.
It is important to remember that while the sup­
p lemental knee airbag system is designed to re­
duce the likelihood of serious injuries, other inju ­
ries, for example, swe lling, bruising and minor
abrasions and friction burns can also occur when
an airbag inf lates .
The knee airbag system basically consists of:
- T he electronic control module
- T wo inflatab le airbags (airbag and gas genera-
to r), one for the driver and one for the front
pass enger
- The airbag indicator ligh t in the instrument
panel
The knee airbag system will not deploy:
-whe n the ignition is switched off
- in frontal collisions when the deceleration
measured by the control un it is too low
- in side collisions
- in rea r-end collisions
288
-in rollovers
- in the event of a system malfunction (warning/
ind icator light is on)
¢page 32 .
A WARNING
-Safety belts and the airbag system can only
provide protection when occupants are in
the proper seating
position ¢ page 281 .
-If the airbag indicator light ¢ page 32
comes when the veh icle is being used, have
the system inspected immediately by your
author ized Audi dealer. It is possible that
the airbag will inflate when it is not sup­
posed to, or will not inflate when it should.
How knee airbags work
The risk of injury to the leg area con be reduced
by fully inflated knee airbags.
Fig. 243 In flated a irbags protect ing in a fro nta l coll ision
The knee airbag system has been designed so
that the airbags for the dr iver and front passen­
ger dep loy in certain but not all fronta l collisions .
If the front airbags deploy, the knee airbags also
deploy in frontal collisions when the deployment
threshold stored in the control unit is met .
When the system deploys, the airbags fill with a
prope llant gas, and inflate between the lower
part of the instrument panel and the driver and
the lower part of the instrument panel and the
front passenger
¢page 281, fig. 240 .
Although they are not a soft pillow, they can
"cushion" the impact and in this way they can
help to reduce the risk of injury to the lower ex­
tremities.

Airbag system
the occupant sitting next to it is not seated prop­
erly. The side airbag for the front passenger seat
can be used with properly installed child re­
straints. Please be sure to read the important in­
formation and warnings whenever using a child
restraint in a vehicle: Safety belts
Qpage 263,
Airbag system Qpage 271, Ch ild safety
c::;, page 295.
The side airbag system basically consists of:
-the e lectronic control modu le and externa l side
impact sensors
- the two side airbags located in the sides of the
front backrests
- two rear side airbags*
- the airbag warning light in the inst rument clus -
ter.
The airbag system is monitored electronically to make certa in that it is functioning properly at all
times. Each time you turn on the ign it ion, the air­
bag system indicator light will come on for a few
seconds (self diagnostics).
The side airbag system supplements the safety
be lts and can help to reduce the risk of injury to
the driver's, front and rear* passenger 's upper
torso on the side of the vehicle that is struck in a
side co llision. The a irbag dep loys only in side im­
pacts and on ly when the vehicle acceleration reg­
istered by the control unit is high enough . If this
rate is below the reference value programmed in­
to the control un it, the side airbags will not be
tr iggered, even though the car may be badly
damaged as a result of the collision.
It is not pos­
sib le to define an a irbag tr igger ing range that
will cover every possible angle of impact, since
the circumstances will vary considerably between
one collision and another . Important factors in­
clude, for example, the nature (hard or soft) of
the impacting object, the angle of impact, vehicle
speed, etc.
Q page 291, Important safety in­
structions on the side airbag system.
Aside from their normal safety function, safety be lts work to help keep the driver or front pas­
senger in pos it ion in the event of a s ide collision
so that the side a irbags can provide protection.
The airbag system is
not a subst itute for your
safety belt. Rather, it is part of the overall occu-
290
pant res traint system in your vehicle . Always re­
member that the side airbag system can only
help to protect you if you are wear ing your safety
belt and wearing it properly. This is another rea­
son why you should a lways wear your safety
belts, not just because the law requires you to do
soc::;, page 263, General information .
It is important to remember that while the sup­
plemental side airbag system is designed to re­
duce the likelihood of ser ious injuries, other inju­
ries, for example, swelling, bru is ing, friction
burns and minor abrasions can also be assoc iated
with deployed side airbags. Remember too, side
a irbags w ill dep loy only once and only in certa in
kinds of accidents
-your safety belts are always
there to
offer protection.
Vehicle damage, repair costs or even the lack of
vehicle damage are not necessarily an ind icat ion
of over-sens itive or fa iled airbag activation. In
some collisions, both front and side airbags may
inflate. Remember too, that airbags wi ll deploy
on ly once and only in certain kinds of collisions
-
your safety be lts are always there to offer protec­
tion in those accidents in which airbags are not
supposed to deploy or when they have already
deployed .
The side airbag system will not deploy:
- when the ignition is turned off
- in side co llisions when the acceleration meas -
ured by the sensor is too low
- in front-end collisions
- in rea r-end collisions
- in rollovers.
In some types of accidents the front airbags, side
curta in airbags and side a irbags may be triggered
together .
&_ WARNING
-Safety belts and the airbag system will only
provide protection when occupants are in
the proper seating position
Q page 291.
- If the airbag indicato r light Q page 32
comes when the vehicle is being used, have
the system inspected immediately by your
authorized Audi dealer. It is possible that

collision. It is not possible to define an airbag
triggering range that will cover every possible
an­
g le of impact, s ince the circumstances will vary
considerably between one collision and another.
Important factors include, for example, the
na­
ture (hard or soft) of the impacting object, the
angle of impact, vehicle speed, etc.
¢ page 293,
How side curtain airbags work .
Aside from their normal safety function, safety
be lts work to he lp keep the driver or front pas­
senger in pos it ion in the event of a collision so
that the side curtain airbags can p rovide protec­
tion .
The airbag system is not a substitute for your
safety belt . Rather, it is part of the overall occu­
pant restraint system in your veh icle . Always
re­
member that the airbag system can only help to
p rotect you if you are wearing your safety bel t
and wearing it properly . This is another reason
why you should always wear your safety belts, not just because the law requires you to do so
¢ page 263, General information.
It is important to remember that whi le the s ide
curtain airbag system is designed to he lp reduce
the likelihood of serious injuries, other injuries,
for example, swelling, bruising, friction burns and minor abrasions can also be associated with
these airbags upon deployment . Remember too,
these airbags will deploy only o nce and only in
certa in ki nds of acc idents -your safety belts are
always there to offer protection .
The side curtain airba g sy stem ba sically
consists of:
- The electronic control module and external s ide
impact senso rs
- The side curtain airbags above the w indows of
the outer seating positions with ejection miti­
gation feat ures
- The airbag indicator light in the instrument
panel
The airbag system is monitored electronically to make certain it is funct ion ing properly at all
times . Each time you turn on the ignit ion, the air­
bag system ind icator light will come on for a few
seconds (self d iagnost ics) .
Airb ag sys tem
The side curta in airbag is not activ ated:
- if the ignition is turned off
- in side co llisions whe n the acceleration meas-
ured by the sensor is too low
- in rear-end col lisions .
_&. WARNING
-Safe ty bel ts and the airbag system will only
provide pro tect ion when occupants are in
the proper seating position
¢ page 65,
Front seats.
- I f the airbag ind ic a tor light q page 3 2
comes when the veh icle is being used, have
the system inspected immediately by your
authorized Audi dealer. It is possib le that
the airbag will inflate when it is not sup­
posed to, or w ill not inf late when it should.
How side curtain airbags work
Side curtain airbags con work together with side
airbags to help reduce the risk of head and upper torso injuries for occupants who are properly re­
strained .
Fig. 24 7 Illustration of pr incip le: Inflated s ide curta in air­
bags o n the left s ide
The side curtain airbags inflate between the oc­
cupant and the w indows in a side collis ion
c> fig . 247 .
When the system is triggered, the side curtain
airbag is filled with propellant gas and breaks
through a seam above the front and rear side
windows identified by the AIRBAG label. In order
to help provide this additional protect ion, the
s ide curtain a irbag must inf late w ithi n the blink
of a n eye at very high speed and with g reat fo rce .
T he side c urtain airbag could injure you if yo ur
Ill>
293

a co .... N ,....
N .... 0 0
3 co
on all the time whenever the ignition is
switched on.
- If the
PASSENGER AIR BAG OFF ~. light
does not come on and stay on, immediate­
ly install the forward-facing child seat in a
rear seating position and have the airbag
system inspected by your authorized Aud i
dealer.
- Always buckle the child seat firmly in
p lace even if a ch ild is not sitt ing in it. A
loose child seat can fly around during a
sudden stop o r in a collision.
-Always read and heed all WARNINGS whenever using a child restraint in a vehi­
cle ~ page 263, Safety belts, ~ page 2 71,
Airbag system
and ~ page 295, Impor­
tant information .
@ Tips
Always replace ch ild restraints that were in­
stalled in a vehicle dur ing a crash. Damage to
a child restraint that is not visib le co uld cause
it to fail in anothe r collision situation .
Advanced front airbag system and children
Your vehicle is equipped with an "Advanced Air­
bag System" in compliance with United States
Federal Motor Vehicle Safety Standard (FMVSS)
208, as well as Canada Motor Vehicle Safety
Standard (CMVSS) 208 as applicable at the time
your veh icle was manufactured.
The Advanced Airbag system in your vehicle has
been certified to meet the "low-risk" require­
ments for
3-and 6-year old children on the pas­
senger side and small adults on the driver side.
The low risk deployment crite ria are intended to
reduce the risk of injury through inte raction with
the airbag that can occur, for examp le, by being
too close to the steering whee l and instrument
panel when the airbag inflates . In addition, the
system has been certified to comply with the
"suppression" req uirements of the Safety Stand­
ard, to turn off the front airbag for infants up to
12 months who are restra ined on the front pas­
senger seat in child restraints that are listed in
the Standard .
Child safety
Even though your vehicle is equipped with an Ad­
vanced Airbag system, all chi ldren, especially
those 12 years and younger, should always ride in the back seat properly restrained for their age
and size. The airbag on the passenger side makes
the front seat a potentia lly dangerous place for a
child to ride . The front seat is not the safest place
for a ch ild in a forward-fac ing ch ild safety seat .
It
can be a very dangerous place fo r an infant o r a
la rger ch ild i n a rea rwa rd-facing seat .
T he veh icle 's Advanced Airbag System has a ca­
pacit ive passenger detection system in the front
passenge r seat cushion that can detect the p res­
ence of a baby or a ch ild in a child restra int sys­
tem on this seat .
The capacitive passenger detection system reg is­
te rs the changes that result in an electrical field
when a child, a ch ild restraint, and a baby b lan ket
are on the front passenger seat. The change in
the measured capacitance due to the presence of
a chi ld, a child restraint, and a baby blanket on
the front passenger seat is related to the child
restra int system resting on the seat. The meas­
ured capacitance of a child restraint system var­
ies depend ing on the type of system and specific
make and model.
The electrical capac itance of the various types,
makes, and models of child restraints specif ied
by the U .S.National Highway Traff ic Safety Ad ­
min istrat ion (NHTSA) in the relevant safety
standard are stored in the Advanced Airbag Sys­
tem contro l unit together with the capacitances
typ ica l of infants and a 1-year old child. When a
child restraint is used on the front passenger
seat with a typical 1 year-old infant, the Ad­
vanced Airbag System compares the capacitance
measured by the capacitive passenger detection
system with the data stored in the electronic con­
trol unit .
Child restraints and Advanced Airbags
Regardless of the ch ild restraint that you use,
make sure that it has been certified to meet Safe­
ty Standards and has been ce rt ified by its manu­
fact urer for use w ith an airbag . Always be su re
that the child restraint is properly installed at
llo-
297