steering AUDI A4 2017 Workshop Manual

Safety belts
Why use safety belts?
Frontal collisions and the law of physics
Frontal crashes create very strong forces for peo­
ple riding in vehicles .
Fig. 209 Unbelted occupants in a veh icle headi ng fo r a wall
Fig. 210 T he vehicle c rashes into the wall
The physical principles are simple. Both the vehi­
cle and the passengers possess energy which var­ ies w ith vehicle speed and body weight . Engi­
neers call this energy "k inetic energy."
The higher the speed of the vehicle and the
greater the vehicle's weight, the more energy
that has to be "absorbed" in the crash.
Vehicle speed is the most significant factor .
If
the speed doubles from 15 to 30 mph (25 to 50
km/h), the energy increases 4 times!
Because the passengers of this vehicle are not us­
ing safety belts
r:!) fig. 209, they will keep moving
at the same speed the vehicle was moving just
before the crash, unti l something stops them -
here, the wall
r:!) fig . 210.
The same principles apply to people sitting in a
vehicle that is involved in a frontal collision . Even
at c ity speeds of 20 to 30 mph (30 to 50 km/h),
the forces acting on the body can reach one ton
246
(2,000 lbs. or 1,000 kg) or more . At greater
speeds, these forces are even higher.
People who do not use safety belts are also not
attached to their vehicle. In a frontal collision
they will also keep moving forward at the speed
their vehicle was travelling just before the crash.
Of course, the laws of physics don't just apply to
frontal collisions, they determine what happens in all kinds of accidents and collisions .
What happens to occupants not wearing
safety belts?
In crashes unbelted occupants cannot stop
themselves from flying forward and being in­
jured or killed . Always wear your safety belts!
Fig. 211 A drive r not wea ring a safety belt is vio len tly
t hrow n forward
Fig. 212 A rear passe nge r not wear ing a sa fety belt will f ly
forward an d str ike the driver
Unbelted occupants a re not able to res ist the tre­
mendous forces of impact by holding tight or
bracing themselves. Without the benefit of safe­
ty restraint systems, the unrestra ined occupant
will slam violently into the steering wheel, in­
strument panel, windshield, or whatever e lse is
in the way
r:!) fig . 211. T h is impact with the vehi ­
cle interior has all the energy they had just be-
fore the crash.
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Airbag system
Important information
Importance of wearing safety belts and
sitting properly
Airbags are only supplemental restraints. For
airbags to do their job, occupants must always
properly wear their safety belts and be in a prop­
er seating position.
For your safety and the safety of your passen­
gers, before driving off, always :
.,. Adjust the driver's seat and steering wheel
properly
9 page 237,
.,. Adjust the front passenger's seat properly
¢page 238,
.,. Wear safety belts properly¢ page 247,
.,. Always properly use the proper child restraint
to protect children ¢
page 2 77.
In a collision, airbags must inflate within the
blink of an eye and with considerable force. The
supplemental airbags can cause injuries if the
driver or the front seat passenger is not seated
properly. Therefore in order to help the airbag to
do its job, it is important, both as a driver and as
a passenger to sit properly at all times.
By keeping room between your body and the
steering wheel and the front of the passenger
compartment, the airbag can inflate fully and
completely and provide supplemental protection in certain frontal collisions
¢ page 237, Correct
seating position for passengers.
For details on
the operation of the seat adjustment controls
¢page 61.
It 's especially important that children are proper­
ly restrained
¢page 277 .
There is a lot that the driver and the passengers
can and must do to help the individual safety fea­
tures installed in your Audi work together as a
system.
Proper seating position is important so that the
front airbag on the driver side can do its job. If
you have a physical impairment or condition that prevents you from sitting properly on the driver
seat with the safety belt properly fastened and
Airbag system
reaching the pedals, or if you have concerns with
regard to the function or operation of the Ad­
vanced Airbag System, please contact your au­
thori zed Audi dealer or qualified workshop, or
call Audi Customer Relations at 1-800-822-2834
for possible modifications to your vehicle.
When the airbag system deploys, a gas generator
will fill the airbags, break open the padded cov­ ers, and inflate between the steering wheel and
the driver and between the instrument panel and
the front passenger. The airbags will deflate im­
mediately after deployment so that the front oc­
cupants can see through the windshield again
without interruption.
All of this takes place in the blink of an eye, so
fast that many people don't even realize that the airbags have deployed. The airbags also inflate
with a great deal of force and nothing should be
in their way when they deploy. Front airbags in
combination with properly worn safety belts slow
down and limit the occupant's forward move­
ment . Together they help to prevent the driver
and front seat passenger from hitting parts of
the inside of the vehicle while reducing the forces
acting on the occupant during the crash . In this
way they help to reduce the risk of injury to the
head and upper body in the crash. Airbags do not
protect the arms or the lower parts of the body.
Both front airbags will not inflate in all frontal
collisions . The triggering of the airbag system de­
pends on the vehicle deceleration rate caused by
the collision and registered by the electronic con­
trol unit . If this rate is below the reference value
programmed into the control unit, the airbags
will not be triggered, even though the car may be badly damaged as a result of the collision. Vehi­
cle damage, repair costs or even the lack of vehi­
cle damage is not necessarily an indication of
whether an airbag should inflate or not.
Since the circumstances will vary considerably
between one collision and another, it is not possi­
ble to define a range of vehicle speeds that will
cover every possible kind and angle of impact
that will always trigger the airbags . Important
factors include, for example, the nature (hard or
soft) of the object which the car hits, the angle of
impact, vehicle speed , etc. The front airbags will
II>
253

Airbag syste m
also not inflate in s ide or rear collisions, or in
ro ll-overs.
Alwa ys rememb er: Airbags will deploy only once,
and on ly in ce rtain k inds of coll is ions. Yo ur safety
be lts are always there to offer protection in those
situations in which airbags are not supposed to
dep loy, or when they have already deployed; for
examp le, when your vehicle str ikes or is struck by
another vehicle after the first coll is ion.
This is just one of the reasons why an airbag is a
supp lementary restraint and is not a substitute
for a safety belt. The a irbag system works most
effect ively when used with the safety belts.
Therefore, always properly wear your safety belts
c::>page 245.
A WARNING
Sitting too close to the steering wheel o r in­
st rument panel will decrease the effective­
ness of the airbags and will inc rease the risk
of personal injury in a co llision.
- Never sit closer than 10 inches (25 cm) to
the steering wheel or instrument panel.
- If you cannot si t mo re than 10 inches
(25 cm) from the steering wheel, invest i­
gate whether adaptive equipment may be
available to help yo u reach the pedals and
increase your seating distance from the
steering wheel.
- All veh icle occupants and especially children
must be restrained properly whenever riding
in a vehicle. An unrestrained or improperly
restra ined child could be injured by striking
the interior or by being ejected from the ve­
hicle during a sudden maneuver or impact.
An unrestrained or imp roperly restrained
child is also at greate r risk of inju ry or death
through contact with an inflating airbag.
- If you are unrestrained, leaning fo rwa rd, s it­
t ing s ideways or o ut o f pos ition in any way,
yo ur risk of in ju ry is much h igher.
- Yo u will also receive serious injuries and
c ould even be killed if you are up aga inst the
air bag or too close to it when it inflates -
even with an Advanced Airbag.
254
-
- To reduce the ris k of i njury when an a irbag
inflates, always wea r safety belts properly
c::> page 248, Safety belts.
- Always make certa in that children age 12 or
younger always ride in the rear seat. If chil­
dren are not properly restrained, they may be severely injured or killed when an airbag
inflates.
- Never let ch ildren ride unrestra ined or im­
properly restrained in the vehicle. Ad just the
front seats properly.
- Never ride with the back rest recl ined .
- Always sit as far as possible from the steer-
ing wheel or the instrument panel
c::>page237.
- Always sit upright w ith your back against
the backrest of your seat .
- Never p lace your feet on the instrument
panel or on the seat. Always keep both feet
on the floor in front of the seat to help pre­
vent serious injur ies to the legs and hips if
the airbag inflates.
- Never recl ine the front passenger's seat to
transpo rt objects . Items can also move in to
the area of the s ide a irbag or the front air­
bag du ring brak ing o r in a sudden maneu­
ver. Obje cts nea r the airbags can become
projecti les and cause injury when an airbag
inflates.
A WARNING
A irbags that have deployed in a crash must be
replaced.
- Use on ly original equipment airbags ap­
proved by Audi and installed by a trained
technician who has the necessary tools and
diagnostic equipment to properly replace
any airbag in your vehicle and assure system
effectiveness in a crash.
- Never perm it salvaged or recycled airbags to
be installed in your vehicle.
Child restraints on the front seat - some
important things to know
.,. Be s ure to read the impo rtant info rmat ion and
heed the WARN INGS for important deta ils .,.

-Improper installation of child restraints can
reduce their effect iveness or even prevent
them from providing any protection .
- An improper ly installed ch ild restraint can
interfere w ith the airbag as it deploys and
seriously injure or even kill the child -even
with an Advanced Airbag System .
- Always carefu lly follow the manufacturer's
instructions provided with the child safety
seat or carrier.
- Always make sure that there is nothing on
the front passenger seat that will cause the
capacit ive passenger detection system in
the seat to signa l to the Airbag System that
the seat is occupied by a person when it is
not, or to signa l tha t it is occ upied by some ­
one who is heavier than the person actua lly
sitting on the seat. The p resence of addi ­
t ional objects could cause the passenge r
front airbag to be turned on when it shou ld
be off, or could cause the airbag to work in a
way that is different from the way it would have worked without the object on the seat .
Front airbags
Description of front airbags
The airbag system can provide supplemental
protection to properly restrained front seat occu ­
pants.
F ig. 219 Loca tion of driver airb ag: in stee ring whee l
Airb ag sys tem
Fig. 220 Locat io n of fro nt passen ger 's a irbag : in t he in·
s tr um en t pan el
Your vehicle is equipp ed with an "Advanced Air­
bag System " in compliance with United States
Fede ral Motor Vehicle Safety Standard
(FMVSS) 208, as well as Canada Motor Veh icle
Safety Standard (CMVSS) 208 as applicable at
the time your veh icle was manufactured . The
safe ty belts fo r the seats have "pretensione rs "
that help to take slack out of the bel t system.
T he pretensioners are also activated by the e lec ­
tronic control unit for the airbag system .
T he front safety belts also have load limiters to
help reduce the fo rces applied to the body in a
c rash .
The airbag for the driver is in the steering wheel
hub
r:::> fig. 219 a nd the airbag fo r the front pas­
senger is in the instrument pane l
~fig. 220. The
general lo cat ion of the airbags is marked "A IR­
BAG".
T he re is a lot yo u need to know about the airbags
i n your vehicle. We urge you to read the deta iled
informa tion abo ut airbags, s afety be lts and c hild
safety in this and the other chapters that make
u p the owner 's literatu re . Please be sure to heed
the WARNINGS -they ar e extrem ely important
for your safety and the safety of your passengers, especially infants and small child ren.
A WARNING
Never rely on airbags alone for protect ion .
- Even when they deploy, airbags provide only
supp lemental protection.
- Airbag work most effectively when used
wit h properly worn safety be lts .
257

Airbag system
-Therefore, always wear your safety belts and
make sure that everybody in your vehicle is
properly restrained.
- Always hold the steering wheel with both
hands on the outside of the steering wheel
rim at the 9:00 o 'clock and 3 :00 o'clock po­
sitions to help reduce the risk of personal in ­
jury if the driver's airbag inflates .
- Never hold the steering wheel at the 12
o'clock position or with your hands any­
where inside the steering wheel or on the steering wheel hub. Holding the steering
wheel the wrong way increases the risk of
severe injury to the arms, hands, and head if
the driver airbag deploys.
A WARNING
Objects between you and the airbag will in­
crease the risk of injury in a crash by interfer­
ing with the way the airbag unfolds and/or by
being pushed into you as the airbag inflates.
- Always make sure nothing is in the front air-
-
bag deployment zone that could be struck
by the airbag when it inflates.
- Objects in the zone of a deploying airbag
can become projectiles when the airbag de­
ploys and cause serious personal injury.
- Never hold things in your hands or on your lap when the vehicle is in use .
- Never place accessories or other objects
(such as cup holders, telephone brackets,
note pads, navigation systems, or things
that are large, heavy, or bulky) on the doors;
never attach then to the doors or the wind­
shield; never place them over or near or at­
tach them to the area marked ,.AIRBAG" on
the steering wheel, instrument panel or the
seat backrests; never place them between
these areas and you or any other person in
the vehicle.
- Never attach objects to the windshield
above the passenger front airbag, such as
accessory GPS navigation units or music
players. Such objects could cause serious in­
jury in a collision, especially when the air­ bags inflate .
258
-Never recline the front passenger seat to
transport objects. Items can also move into
the deployment area of the side airbags or
the front airbag during breaking or in a sud­
den maneuver . Objects near the airbags can
fly dangerously through the passenger com­
partment and cause injury, particularly
when the seat is reclined and the airbags in­
flate.
A WARNING
A person on the front passenger seat, espe­
cially infants and small children, will receive
serious injuries and can even be killed by be­ ing too close to the airbag when it inflates .
- Although the Advanced Airbag System in
-
your vehicle is designed to turn off the front
passenger airbag if an infant or a small child
is on the front passenger seat, nobody can
absolutely guarantee that deployment un­
der these special conditions is impossible in
all conceivable situations that may happen
during the useful life of your vehicle.
- The Advanced Airbag System can deploy in
accordance with the .,low risk" option for 3-
and 6-year-old children under the U.S . Fed­
eral Standard if a child with electrical capac­
itance greater than the combined capaci­
tance of a typical one-year old infant re­
strained in one of the forward facing or rear­
ward-facing child seats with which your ve­
hicle was certified is on the front passenger
seat and the other conditions for airbag de­
ployment are met.
- Accident statistics have shown that children
are generally safer in the rear seat area than
in the front seating position.
- For their own safety, all children, especially
12 years and younger, should always ride in
the back properly restrained for their age and size.
Advanced front airbag system
Your vehicle is equipped with a front Advanced
Airbag 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 vehicle was manufactured .
The front Advanced Airbag System supp lements
the safety belts to prov ide additional pro te ction
for the driver's and front passenger 's heads and
upper bodies in frontal crashes . The airbags in­
flate only in fronta l impacts when the veh icle de­
celerat ion is high enough.
The front Advanced Airbag System for the front
seat occupants is not a substitute for your safety be lts. Rather, it is part of the overa ll occupant re ­
stra int system in your vehicle. A lways remember
that the airbag system can on ly help to protect
you, if you are sitting upr ight, wear ing your safe ­
ty belt and wear ing it properly. This is why you
and your passengers must always be prope rly re­
stra ined, not jus t because the law req uires yo u to
be.
The Advanced Airbag System in your ve hicle has
been ce rtified to meet the "low risk" requi re­
men ts for 3 and 6 yea r-o ld children o n the pas­
senger side and very sma ll adul ts on the drive r
side . The low r isk dep loymen t cr iteria are inten d­
ed to help reduce the risk of injury through inter­
action with the front airbag that can occ ur, for
examp le, by being too close to the steering wheel
and instrument pane l when the airbag inf lates .
I n addition, the system has been certified to
comp ly with the "supp ression" requirements of
the Safety Standard, to turn off the front a irbag
for infants 12 months old and younger who are
restrained on the front passenger seat in c hild re­
stra ints that are listed in the Standard
c::> page 2 79, Child restraints and Advanced Air­
bags.
"Suppress ion" requ ires the front a irbag on the
passenger side to be turned off if:
- a ch ild up to about one year of age is restra ined
on the front passenger seat in one of the rear­
facing or forward-fac ing infant restra ints listed
in Federal Motor Vehicle Safety Standard 208
with wh ic h the Advanced Ai rbag System in your
;;!; vehicle was ce rtified. For a listi ng of the ch ild ....
~ restra ints tha t were used to certify your veh i-
N 8 cl e's compl iance wi th t he US Safe ty St andard
0 3 c::> page 2 79,
Airb ag sys tem
-When a pe rson is detected on the front passen ­
ger seat that has an elect rical capacitance that
is more than the total e lectr ica l capacitance of
a child that is about
1 year o ld restrained in one
of the rear-fac ing or forward-facing infant re­
straints (listed in Federa l Motor Vehicle Safety
Standard 208 with which the Advanced Airbag
System in you r vehicle was cert ified), t he front
ai rbag on the passenger side may or may no t
dep loy.
T he
PASSENGER AIR BAG OFF~; light comes on
whe n the elect ronic control unit detects a tota l
elect rical capacitance o n the front passe nger sea t
t h at re quires the front airbag to be turned off. If
the
PASSENGER AIR BAG OFF~; light does not
come on, the front airbag on the passenger side
has not been turned off by the contro l unit and
can deploy if the contro l unit senses an impact
that meets the cond itions stored in its memory.
If the total e lectr ica l capacitance registe red on
the front passenger seat is more than that of a
typ ica l 1 year -o ld, but less than the weight of a
small adult, the front a irbag on the passenger
s ide may deploy (the
PASSENGER AIR BAG OF F
~; light does not come on) .
For e xample , the airbag may deploy if :
-a sm all ch ild that is heav ier than a typica l 1
year -o ld child is on the front passenger seat
(regard less of whether the child is in one of the
child safety seats listed
c::> page 2 79),
- a child who has outgrown c hild rest raints is on
the front passenger seat .
If the front passenge r a irb ag is turne d off, the
PASSENGER AIR BAG OFF~; light in the head ­
li ner wi ll come on and stay on .
If the front passenge r a ir bag deploys, the Feder ­
al S tand ard requ ires t he a irbag to meet the " low
risk" deployment criteria to he lp red uce the r isk
of i njur y through interaction with the airbag .
" Low risk" deployment occurs in those crashes
that take p lace at lower decelerations as defined
in the electronic contro l unit.
c> page 265
Alway s remember: Even though yo ur vehicle is
equipped with Advanced Airbags, the safest place
f or children is properly restrained on the back ..,.
259

Airbag system
A 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 armrest, door
or roof.
- Always install rear-facing child safety seats
on the rear seat.
- If you must install a rearward -facing child
safety seat on the front passenger seat be­ cause 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 authorized Audi dealer .
A WARNING
Objects between you and the airbag will in­
crease the risk of injury in a crash by interfer ­
ing with the way the airbag unfolds or by be­
ing 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 dur­
ing braking or other sudden maneuvers and
become dangerous projectiles that can
cause serious personal injury if the airbags
inflate.
- Never place or attach accessories or other
objects (such as cupholders, telephone
brackets, large, heavy or bulky objects) on
the doors, over or near the area marked
"AIRBAG" on the steering wheel, instru­
ment panel, seat backrests or between
those areas and yourself . These objects
could cause injury in a crash, especially
when the airbags inflate .
- Never recline the front passenger's seat to
transport objects. Items can also move into
264
the area of the side airbag or the front air­
bag during braking or in a sudden maneu­
ver. Objects near the airbags can become projectiles and cause injury, particularly
when the seat is reclined .
- Never place or transport objects on the
front passenger seat. Objects on the front
passenger seat could cause the capacitive
sensor in the seat to signal to airbag system
that the seat is occupied by a person when it
in fact is not, or that the person on the seat
is heavier than he or she actually is. The
change in electric capacitance because of
such objects can cause the passenger front
airbag to be turned on when it should be
off, or can cause the airbag to work in a way
that is different from the way it would have
worked without objects on the seat .
- Always make sure that there is nothing on
the front passenger seat that will cause the
capacitive passenger detection system in
the seat to signal to the Airbag System that the seat is occupied by a person when it is
not , or to signal that it is occupied by some ­
one who is heavier than the person actually
sitting on the seat. The presence of an ob­
ject could cause the passenger front airbag
to be turned on when it should be off, or
could cause the airbag to work in a way that is different from the way it would have
worked without the object on the seat .
A WARNING
The fine dust created when airbags deploy can
cause breathing problems for people with a
history of asthma or other breathing condi­
tions .
- To reduce the risk of breathing problems,
those with asthma or other respiratory con­
ditions should get fresh air right away by
getting out of the vehicle or opening win­
dows or doors.
- If you are in a collision in which airbags de­
ploy , wash your hands and face with mild
soap and water before eating.
- Be careful not to get the dust into your eyes,
or into any cuts or scratches. ..,_

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 out when an adult is si tting on
the front passe nger seat a fter 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 stee r­
ing wheel horn pad or airbag cover or the in­
strument pane l or modify them in any way.
268
- 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 canno t 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 radios, 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
upholstery over the front seatbacks that
have not been specifically approved by
A udi.
- Never use additional seat c ushions 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 autho riz ed 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 su re 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.
~

-For safety reasons in severe accidents, the
alternator and starter are separated from
the vehicle battery with a pyrotechn ic circuit
interrupter.
- Work on the pyrotechnic circ uit interrupt ­
er must only be performed by a qualified
technicians who have the experience, in ­
formation and special tools necessary to
perform the work safely.
- If the vehicle or the circuit interrupter is
scrapped, all app licab le safety precautions
must be followed .
@) For the sake of the environment
Undeployed airbag modu les a nd pretension ­
ers might be classified as Perch lorate Materi­
al -special handling may apply, see
www.dtsc .ca.gov/hazardouswaste/perchlo­
rate. When the vehicle or parts of the re­
straint system including airbag modules and
safety belts with pretensioners are scrapped,
all applicable laws and regulations must be
observed. Your authorized Audi dealer is fa­
m iliar with these requi rements a nd we recom­
mend t hat you have you r dealer perform this
service for you.
Other things that can affect Advanced
Airbag performance
Changing the vehicle's suspension system can
change the way that the Advanced Airbag System
performs in a crash . For example, using tire-r im
comb inat ions not approved by Audi, lowering the
ve hicl e, chang ing the stiffness of the suspens io n,
in clud ing the spr ings, suspens ion str uts, shock
absorbers et c. can change the forces that are
measured by the airbag sensors and sent to the
e lectronic contro l unit. Some suspension changes
can, for example, increase the force levels meas­
ured by the sensors and make the airbag system
deploy in crashes in wh ich it would not deploy if
the changes had not been made. Other ki nds of
changes may reduce the fo rce levels meas ured by
the sensors and prevent the airbag from deploy­
in g when i t should .
Airbag sys tem
A WARNING
-Changing the vehicle's suspension including
use of unapproved tire-rim combinations can
change Advanced Airbag performance and in­
crease the risk of serious persona l injury in a
crash.
- Never install suspension components that
do not have the same pe rformance charac­
teristics as the components o rigina lly ins tal­
led on your vehicle.
- Never use tire-rim combinations t hat have
not been approved by Audi.
Knee airbags
Description of knee airbags
The knee airbag system can provide supplemen­
tal protection to prop erly restrained front sea t
occupants.
F ig. 223 D river 's knee a irbag
The driver knee airbag is in the instrument panel
u nderneath the steering whee l
~fig. 223, the
airbag fo r the p asse nger is at about the same
height in the instr ument pane l underneath the
glove compa rtment.
T he knee airbag offers add itiona l protection to
the driver's and passenge r's knees and uppe r and
lower thigh areas and supp lements the protec­
tion provided by the safety be lts .
If the front airbags deploy, the knee airbags a lso
deploy in fron tal coll is ions when the deploymen t
threshold stored in the cont rol un it is me t
~ page 263, More important things to know
about front airbags.
269

All of this takes place in the blink of an eye, so
fast that many people don't even realize that the airbags have deployed . The airbags also inflate
with a great deal of force and it is important for
occupant safety that nothing should be in their
way when they deploy .
Fully inflated airbags in comb ination with proper­
ly worn safety belts slow down and limit the oc­
cupant 's forward movement and help to reduce
the r isk of injury .
Important safety instructions on the knee
airbag system
Airbags are only supplemental restraints . Always
wear safety belts correctly and ride in a proper
seating position.
There is a lot that you and your passengers must
know and do to help the safety be lts and airbags
to provide s upplemental protection .
,& WARNING
An inflating knee airbag can cause ser ious in­
jury. Wearing safety bel ts incor rectly and im­
proper seating posit ions increase the r isk o f
serious personal injury and death whenever a
vehicle is being used.
- The knee airbag system cannot protect you
prope rly if you are seated too close to any of
the a irbag locat ions. When ad justing their
seat positions, it is important that both the
dr iver and the front passenger keep their
upper bod ies a nd knees at the following
min imum safe d istances:
- at least 10 inches (25 cm) between the
chest and the steering wheel/instrument
panel.
- at least 4 inc hes (10 cm) between the
knees and the lower part of the instru­
ment panel.
- The risk of persona l injury increases if you
lean forward or to the side, or if the seat is
improper ly positioned and you are not wear­
ing your safety belt. The risk increases even
more should the a irbag deploy.
- Always make sure that the knee airbag can
inflate without interference. Objects be-
Airbag sys tem
tween you and the airbag can increase the
risk of injury in an accident by interfering
wit h the way the airbag deploys or by being
pushed into yo u as the a irbag deploys.
- Never let anybo dy, especi ally children or
anima ls r ide in the footwell i n front of the
passenger seat. If the airbag deploys, this
can result in serious o r fatal in juries.
- Never carry objects of any kind in the foo t­
well area in front of the driver's or pas­
senger's seat . Bulky objects (shopp ing
bags, for example) can interfere with or
prevent proper dep loyment of the airbag.
Small objects can be thrown th rough t he
vehicle if the airbag deploys and injure you
o r your passengers.
- Make sure the re a re no cracks, deep scratch­
es o r othe r damage in the area of the inst ru­
ment panel where the knee airbags a re lo­
ca ted.
- If ch ildren are incorrectly seated, their risk
of injury inc reases in a coll is ion
~ page 2 7 7, Child safe ty.
Side airbags
Description of side airbags
The airbag system can provide supplemental
protection to properly restrained occupants.
Fi g. 22 5 Side a irbag locat ion in the drive r's sea t
The side airbags are located in the s ides of the
front seat backrests~
fig. 225 and the rear back­
res t* facing the doo rs.
The side airbags installed for the front seating
pos itions have been des igned and certified to
help reduce the risk of in ju ry that can be caused
by a irbags when they inflate, pa rticul arly when .,.
271