2012 AUDI A8 Owners Manual

amount prog rammed in the e lec tronic control
u nit. The front airbag on the passe nger side
will also be turned off if one of the ch ild seats
that has been certified u nder Fede ral Motor
Vehicle Safety Standard 208 has been recog­ n ized o n the seat. The
PASS ENGER AIR BAG
OFF li gh t comes on and stays on to tell you
when the front Advanced A irbag on the pas­
se nger side has been tu rned off
Q page 144,
Child restraints on the front seat -some im­
portant things to know.
A WARNING
To reduce the risk of injury when an airbag
inf lates, a lways wear safety belts properly.
- If you are unrestrained, lean ing fo rward,
sitting sideways or out of position in any
way , yo ur risk of inj ury is much higher.
- You wi ll also receive serio us injuries and
cou ld even be killed if you are up against
the a irbag or too close to it when it in­
flates -even with an Advanced Airbag
Qpage 142.
More important things to know about
front airbags
F ig. 14 7 Inflated front a irbags
Safety belts are important to help keep front
seat occupants in the proper seated pos ition
so that airbags can unfo ld properly and pro­
v ide supplemental protection in a fronta l co l­
lision .
The front a irbags are designed to provide ad­
d itiona l protection for the chest and face of
the dr iver and the front seat passenger when :
- safety be lts are worn properly,
A irba g sy stem 151
- the seats have been positioned so that the
occ upant is properly seated as far as possi­
ble from the airbag,
- and the head restrai nts have been properly
adjusted .
Beca use ai rb ags infl ate i n t he bli nk o f an eye
wi th great fo rce, th ings you have on your lap
or have p laced on the seat co uld become dan­
gerous p ro jecti les, and be p ushed into you if
the a irbag inflates.
When an airbag deploys, fine dust is re leased .
T his is norma l and is not ca used by a fi re in
the ve hicle . 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 wh ile the
s u pplementa l airbag system is designed to re­
duce the like lihood of serious injur ies , other
injuries, for example swelling, bru is ing and
minor abrasions, can also happen when air­
bags i nflate . A irbags do not protect the arms
or the lower parts of the body. Front a irbags
suppleme nt the th ree-point safety be lts only
i n some fronta l colli sions in which the vehicle
deceler ation is high e nough to deploy the air­
bags .
Front airbags will not deploy :
-if the ignition is sw itched off when a c rash
o ccur s,
- in side co llisions,
- in rear-end coll is ions,
- in rollovers,
- when the crash deceleration measu red by
the airbag system is less than the minimum
threshold needed for a irbag deployment as
reg istered by the electro nic contro l unit .
The front passenger airbag also will not
deploy:
-when the front passenger seat is not occu­
pied,
- when the weight on the front passenger seat as sensed by the Advanced Airbag Sys­
tem ind icates that the front a irbag on the
passenger side has to be turned off by the
II>

152 Airbag sys te m
electronic contro l uni t (the PAS SENGER AIR
BAG OFF
light comes on and stays on) .
A WARNING
Sitting in the wrong position can increase
the risk of serious injury in crashes.
- To reduce the risk of injury when the air­
bags 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 a irbags are located .
- Occupants who are unbelted, out of posi ­
t ion or too close to the airbag can be se­
riously injured by an airbag as it unfolds
with great force in the blink of an eye
<=?page 144.
A WARNING
-
A child in a rearward -facing child sea t in­
stalled on the front passenger seat will be
seriously injured and can be killed if the
front airbag inflates -even with an Ad­
vanced Airbag System.
-The inflating ai rbag will hit the child seat
or infant carrier with great force and will
smash the ch ild seat and child against
the backrest , center armrest, door or
roof .
- Always install rear-facing child seats on
the rear seat.
- If you must install a rearward facing child seat on the front passenger seat
because of except iona l circumstances
and the
PASSENGER AIR BAG OFF light
does not come on and stay on, immedi­
ately i nstall the rea r-facing chi ld seat in a
rear seating position and have the ai rbag
system inspected by your Au di dealer.
A WARNING
Objects be tween you and the a irbag will
increase the risk of in jury in a c rash by in ­
terfering with the way the airbag unfolds
or by being pushed into yo u as the a irbag
inf lates. -
Never hold things in you r hands o r on
your lap when the veh icle is in use.
- Never transpo rt items on or in t he a rea
of the front passenger seat. Objects
could move into the area of the front air­
bags during braking or other sudden ma­
neuvers and become dangero us projec ­
tiles that can cause ser ious personal in­
jury if the a irbags inf late .
- Never p lace or attach accesso ries o r oth ­
er objects (such as cup hold ers, te le­
phone b ra ck ets, large, heavy or bulky ob­
jects) on the doors, ove r o r ne ar the are a
marked "AIRBAG" on the s teer ing whee l,
instr ument panel, sea t bac krests o r be ­
tween those areas and yourself. These
objects could ca use in jury in a crash, es­
pecially when the airbags inflate.
- Never recline the front passenger 's seat
to transport objects. Items can a lso
move into the area of the s ide airbag or
the front a irbag during braki ng or in a
sudden maneuve r. Objects near the air­
bags can become projectiles and cause
in jur y, partic ularly when the seat is re­
clined.
A WARNING
The fine dus t create d when air bags deploy
c a n cause breathing p rob lems fo r people
wi th a history of as thma or other breath ­
i ng cond itions.
- T o reduce the risk of breath ing pro blems,
those with asthma or other respiratory
conditions s hou ld get fresh air right
away by getting o ut o f the veh icle or
open ing windows or doors .
- If you are in a collision in which airbags
deploy, 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 c uts or scratches.
- If the res id ue should get into your eyes,
f lush them w ith water.

Monitoring the
Advanced Airbag
System
I ( USA models) /!{ (Canada models )
Airbag monitoring indicator light
Two separate indicators monitor the function
of the Advanced Airbag System: the airbag
monitoring indicator light and the
PASSEN­
GER AIR BAG
OFF light.
The Advanced Airbag System (including the
electronic control unit, sensor circuits and sys­
tem wiring) is monitored continuously to
make sure that it is functioning properly
whenever the ignit ion is on. Each time you
switch on the ignition, the airbag monitoring
indicator light
m (USA mode ls)/ m (Canada
models) will come on for a few seconds (self
diagnostics).
The system must be inspected when the indicator light
(I (USA models);Ei
(Canada models):
-does not come on when the ignition is
switched on ,
- does not go out a few seconds after you
have switched on the ignition, or
- comes on while driving.
If an airbag system malfun ction is detected,
the indicator light will first start flashing to
catch the driver's attention and then stay on
continuously to serve as a constant reminder
to have the system inspected immediately.
If a mal function occurs that turns the front
airbag on the passenger side
off, the PASSEN­
GER AIR BAG
OFF light will come on and stay
on whenever the ignition is on.
A WARNING
An airbag system that is not funct ioning
properly cannot provide supplemental pro­
tection in a frontal crash.
- If the airbag indicator light comes on, it
means that there may be something
wrong with the Advanced Airbag System .
It is possible that the airbag will inflate
Airbag system 153
when it is not supposed to, or will not in­
flate when it sho uld.
- Have the airbag system inspected imme­
diate ly by your Audi dealer.
PASSENGER AIR BAG OFF light
Fig . 148 Sect ion from t he instru ment panel: PASSEN ­
GER AIR BAG OFF light
The PASSENGER AIR BAG OFF light is located
in the center of the instrument panel
<=>fig . 148 .
The PASSENGER AIR BAG OFF light wi ll come
on and stay on to tell you when the front Ad­
vanced Airbag on the passenger s ide has been
turned
off by the electron ic control unit . Each
time you sw itch on the ign ition, the
PASSEN­
GER 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 ch ild or child
restraint on the front passenger seat,
- will go out if the front passenger seat is oc­
cupied 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 chi ld restraint has been in­
stalled on the front passenger seat, or
- the weight reg istered on the front passen­
ger seat is equal to or less than the com -
bined weight of a typical 1 year-o ld
llJl>

154 Airbag sys te m
restrained in one of the rear -facing or for­
ward-facing infant restraints listed in Feder­
al 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
PAS ­
SENGER AIR BA G OFF
light will stay on. Nev­
er install a rearward-fac ing ch ild restra int on
the front passenger seat, the safest place for
a child in any kind of child restraint is at o ne
of the seat ing pos itions on the rear seat
~ page 144, Child restraints on the front seat
- some important things to know
and
~ page 166, Child Safety .
If the PASSENGER AIR BAG OFF light come s
on
when one of the conditions listed above is
met, be sure to check the light regularly to
make certain that the
PA SSENGER AIR BA G
OFF
light stays on continuo usly whenever the
ignition is on. If the
PA SSENGER AIR BAG
OF F
light does not appear on and does not
stay on all the time, stop as soon as it is safe
to do so and
- reactivate the system by switching the igni­
t ion off and then switching it on again;
- remove and reinsta ll the chi ld restraint.
Make sure that the child restraint is properly
insta lled and that the safety be lt for the
front passenger seat has been correct ly
routed throug h the child restraint as descri­
bed in the child restraint manufacturer's in ­
structions;
- make sure that the convert ible locking fea­
tu re on the safety belt for the front passen­
ger seat has been activated and that the
safety belt has been pulled t ight. The belt
mus t not be loose or have loops of slack so
that the sensor below the safety be lt latch
on the seat can do its job
~ page 175 .
-make su re that th ings that may increase the
weight of the chi ld and child seat are not be­
ing transported on the front passenger seat;
- make sure that the safety belt tension sen ­
sor is not b locked. Shake the safety be lt
l atch on the front passenge r seatback and
forth; -
If a strap or tether is be ing used to tie the
child seat to the front passenger seat, make
sure that it is not so t ight that it causes the
weight-sensing mat to measure more
weight than is actually on the seat.
If the PASSENGER AIR BAG OFF light still
does not come on
and does not stay on con­
t in uous ly (when the ignition is switched on),
- take the child restraint off the front passen -
ger seat and install it proper ly at one of the
rear seat positions. Have the airbag system inspected by your Audi dealer immed iate ly.
- move the child to a rear seat position and
make sure that the child is properly restra in­
ed in a ch ild restra int that is appropriate for
its size and age.
The
PASSENGER AIR BAG O FF light should
NO T come on when the ignit ion is on and an
adult is s itting in a proper seating position on
the front passenger seat. If the
PASSENGER
AIR BAG OFF
light comes on and stays on or
flashes fo r about 5 seconds w hile driving, un­
der these cir cumstances, 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 aga inst the
backrest and the backrest is not recl ined
~ page 12 5, Proper oc cupant seating posi­
tions,
- the adult is not tak ing we ight off the seat by
holding on to the passenger assist handle
above the front passenger door or s upport ­
ing their weight on the armrest ,
- the safe ty belt is be ing properly wo rn and
t ha t the re is not a lot o f slack in the safety
be lt webbing ,
- accesso ry sea t covers or cushions o r other
t hings that may cause an incorrec t 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 bee n left in
the sa fety belt latch for the front passenger
seat .
In addition to the
PASSENGER AIR BAG OFF
li ght in the center of the instrument panel, .,..

the message PASS ENGER AIR B AG OFF or
PA SSENGER AIR BA G ON will briefly appear
in the instrument cluster display. Th is is to in ­
form the driver of the current front passenger airbag status .
Important safety instructions on
monitoring the Advanced Airbag System
A WARNING
An airbag system that is not functioning
properly cannot provide supplemental pro­
tection in a frontal crash.
- If the airbag indicator light comes on, it
means that there may be someth ing
wrong with the Advanced Airbag System.
It is possible that the airbag will inflate
when it is not supposed to, or w ill not in­
flate when it should.
- Have the airbag system inspected imme ­
diately by your Aud i dealer.
A WARNING
If the front airbag inflates, a ch ild without
a child restra int, or in a rearward-fac ing
child safety seat, or in a forward-facing
child restrain t that has not been properly
installed will be serio usly injured and can
be killed.
- Even though your veh icle is equipped
with an Advanced Airbag System, make
certain that a ll children, especially 12
years and younger, a lways ride on the
back seat properly restrained for their
age and size.
- Always install forward or rear-facing child seats on the rear seat -even w ith
an Advanced Airbag System.
- If you must install a rearward-facing
child seat on the front passenger seat
because of exceptiona l circumstances
and the
PASSENGER AIR BAG OFF light
does not appear and stay on, immediate­
ly i nstall the rea r-facing chi ld seat in a
rear seating position and have the airbag
system inspected by your Aud i dealer.
-
A irbag system 15 5
-A tight tether or other strap on a rea r­
ward-facing child restraint attached to
the front passenger seat can put too much pressure on the weight-sensing
mat in the seat and reg iste r more weight
than is actually on the seat . The heavie r
weight registered can make the system
wo rk as tho ugh an adult were on the seat
and deploy the Advanced Airbag when it
m ust be suppressed causing serious or
even fata l injury to the chi ld .
- If, in exceptiona l c ircumstances, you
m ust install a forward-facing child re­
straint on the front passenger seat, al­
ways move the seat into its rearmost po­ sition in the seat's fore and aft adjust­
ment range, as far away from the a irbag
as poss ible. The backrest must be adjust­
ed to an upright pos ition. Make su re that
the
PASSENGER AIR BAG OFF light
comes on and stays on all the time when­
ever the ignit ion is switched on.
A WARNING
-
- If the PASSENGER AIR BAG OFF light
does not go out when an ad ult is sitting
on the front passenger seat after taking
the steps described above, make sure the
adu lt is properly seated and restra ined at
one of the rear seating pos itions.
- Have the airbag system inspected by
your Aud i dealer before transporting
anyone on the front passenger seat.
(D Tips
If the weight-sensing mat in the front pas­
senger seat detects an empty seat, the
front airbag on the passenger side wi ll be
turned off, and the
PASSENGER AIR BAG
OFF
light will stay on .
Repair, care and disposal of the airbags
Parts of the airbag system are i nstalled at
many diffe rent p laces o n your Aud i. Insta lling,
removing, servicing or repa iring a part in an
area of the veh icle can damage a part of an .,..
•
•

156 Airbag system
airbag system and prevent that system from
working properly in a collision.
There are some important things you have to know to make sure that the effectiveness of
the system will not be impaired and that dis­
carded components do not cause injury or pol­
lute the environment.
.&_ WARNING
Improper care, servicing and repair proce­
dures can increase the risk of personal in­
jury 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 such as cup
holders or telephone mountings to the
surfaces covering the airbag units.
- For cleaning the horn pad or instrument
panel, use only a soft, dry cloth or one
moi5tened with plain water. Solvent5 or
cleaners could damage the airbag cover
or change the stiffness or strength of the
material so that the airbag cannot de­
ploy and protect properly.
- Never repair, adjust, or change any parts
of the airbag system.
- All work on the steering wheel, instru­
ment panel, front seats or electrical sys­
tem (including the installation of audio
equipment, cellular telephones and CB
radios, etc .) 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 authorized Audi dealer or qualified work­
shop.
- Never modify the front bumper or parts
of the vehicle body.
-Always make sure that the side airbag
can inflate without interference:
- Never install seat covers or replace­
ment upholstery over the front seat- backs that have not been specifically
approved by Audi.
- Never use additional seat cushions that
cover the areas where the side airbags
inflate.
- Damage to the original seat covers or
to the seam in the area of the side air­
bag module must always be repaired
immediately by an authorized Audi
dealer.
- The airbag system can be activated only
once . After an airbag has inflated, it
must be replaced by an authorized Audi
dealer or qualified technician who has
the technical information, training and
special equipment necessary.
- The airbag system can be deployed only
once. After an airbag has been deployed,
it must be replaced with new replace­
ment parts designed and approved espe­
cially for your Audi model version. Re­
placement of complete airbag systems
or airbag components must be per­
formed by qualified workshops only. Make sure that any airbag service action
is entered in your Audi Warranty
& Main­
tenance booklet under
AIRBAG REPLACE­
MENT RECORD.
- For safety reasons in severe accidents,
the alternator and starter are separated
from the vehicle battery with a pyrotech­
nic circuit interrupter.
- Work on the pyrotechnic circuit inter­ rupter must only be performed by a
qualified dealer - risk of an accident!
- If the vehicle or the circuit interrupter
is scrapped, all applicable safety pre­
cautions must be followed.
® For the sake of the environment
Undeployed airbag modules and preten­
sioners might be classified as Perchlorate Material - special handling may apply, see
www .dtsc .ca.gov/hazardouswaste/per-
ch lo rate. When the vehicle or parts of the
restraint system including airbag modules
and safety belts with pretensioners are
scrapped, all applicable laws and .,.

regulations must be observed. Your au­
thorized Audi dealer is familiar with these requirements and we recommend that you
have your 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 Sys­
tem performs in a crash. For example, using
tire-rim combinations not approved by Audi, lower ing the vehicle, changing the stiffness of
the suspension, including the springs, suspen­ sion struts, shock absorbers etc. can change
the forces that are measured by the airbag
sensors and sent to the electronic control
un it . Some suspension changes can, for exam­
ple, increase the force levels measured by the
sensors and make the airbag system deploy in
crashes in which it would not dep loy if the
changes had not been made. Other kinds of
changes may reduce the force Levels meas­
ured by the sensors and prevent the airbag
from deploying when it should.
The sensors in the safety belt buckle for the
driver and front passenger seat tell the elec­
tronic control module if the safety belt is
latched or not. If the safety belt is being used,
the front airbag will deploy at a slightly high­
er rate of vehicle deceleration than if the safe­
ty belt is not being used. Therefore, in a par­
ticular collision, it is poss ible that an airbag
will not deploy at a seating position where the
safety belt is being used but will inflate at the
position where the safety belt is not being
used. It is important that nothing interfere
with the safety belt buckles so that the sen­
sors can send the correct information about
safety belt use to the electronic control unit.
A WARNING
Changing the vehicle's suspension includ­
ing use of unapproved tire-rim combina­
tions can change Advanced Airbag per­
formance and increase the risk of serious personal injury in a crash.
Airbag system 157
-Never install suspension components
that do not have the same performance
characteristics as the components origi­
nally installed on your vehicle .
- Never use tire-rim combinations that
have not been approved by Audi.
A WARNING
-
Items stored between the safety belt
buckle and the center console can cause
the sensors in the buckle to send the
wrong information to the electronic con­
trol module and prevent the Advanced Air­
bag System from working properly.
- Always make sure that nothing can inter­
fere with the safety belt buckles and that they are not obstructed.
Knee airbags
Description of knee airbags
The knee airbag system con provide supple­
mental protection to properly restrained
front seat occupants.
Fig. 149 Driver 's airbag
The driver knee airbag is in the instrument
panel underneath the steering wheel
¢ fig . 149, the airbag for the passenger is at
about the same height in the instrument pan­
el underneath the glove compartment.
The knee airbag offers additional protection
to the driver's and passenger's knees and up ­
per and Lower thigh areas and supplements
the protection provided by the safety belts.
If the front airbags deploy, the knee airbags
also deploy in frontal col lisions when the de­
ployment threshold stored in the control unit .,,.

158 Airbag system
is met ¢ page 151, More important things to
know about front airbags.
I n addition to their normal safety function,
safety belts he lp keep t he driver or front pas­
senger in position in a frontal coll is ion so that
the airbags can provide supplemental protec­
tion.
The airbag system is not a s ubst itute for yo ur
safety be lt . Rathe r, it is part of the overall oc ­
cupant restraint system in your vehicle. Al­
ways remember that the airbag system can
only help to protect you if you are wearing
your safety belt and wear ing it properly. This
is why you shou ld always wear your safety
belt, not just because the law requires you to
do so
¢page 134, General notes .
The safety belt buck le for the driver and front
seat passenge r have switches that tell the air­
bag control module if the safety belt is being
used or not . If the safety belt is being used,
the knee airbag will deploy at a sligh tly higher
rate of decelera tion than if the belt is not be­
ing used . Therefore, in a par tic ul ar collision, it
is possible that an airbag will not deploy at a
seating position where the safety belt is being
used but will inflate at the pos ition where the
safety belt is not be ing used.
Remember too, airbags will deploy only once
and on ly in certain kinds of accidents -your
safety be lts are a lways there to offer protec­
tion in those accidents in which airbags are
not supposed to deploy or when they have al­
ready deployed, fo r example whe n your veh i­
cle strikes or is struck by another after the
fi rst coll is ion.
This is just one of the reasons why an a irbag is
not a substitute for the safety belt . The airbag
system works most effective ly when used with
the safety belts. Therefore, always wea r your
safe ty be lts correctly.
It is importan t to remember that while the
supplemental knee a irbag system is designed
to reduce the like lihood of serious injur ies,
o ther inj uries, fo r example, swel ling, bruising,
minor abr asions and fri ction burn s ca n also
occ ur when an a irbag inflates.
The knee airbag system basic ally consists
of:
- The e lectronic control module
- Two inflatable ai rbags (a irbag a nd gas gen -
erator), one for the driver and one for the
front passenger
- The a irbag indicator light in the instr ument
panel
The knee airbag system w ill not deploy:
- when the ig nit ion is switched off
- in frontal collisions when the deceleration
meas ured by the control unit is too low
- in side collisions
- in rear-end collisions
- in rollovers
- in the event of a system malfunction (warn-
ing/ind icator light is on)
¢ page 18.
A WARNING
--
-Safety belts and the airbag system can
only provide protection w hen occupants
are in the proper seating position
¢page 151.
-If the airbag ind icator light comes when
the vehicle is be ing used , have the sys­
tem inspected immediate ly by you r au­
thori zed A udi dealer. The airbag may not
w ork p roperly when the vehicle accele ra­
tion in a side collision is high enough to
de ploy the airbag . See also¢
page 18 .
How knee airbags work
The risk of injury to the leg area can be re ­
duced by fully inflated knee airbags.
Fi g. 1 50 In flated airbags protect ing in a frontal colli­
s io n
...