steering wheel AUDI Q7 2015 Owner´s Manual

182 Airbag sys tem
Airbag system
Important things to know
Importance of wearing safety belts and
sitting properly
Airbags are only supplemental restraints. For
airbags to do their job , occupants must al­
ways properly wear their safety belts and be
in a proper seating position.
F or your safety and the safety of your passen­
gers, before driving off, a lways:
• Adjust the driver's seat and steering wheel
properly ¢
page 164,
• Adjust the front passenger's seat properly
r=; page 75,
• Wear safety be lts properly ¢ page 176,
• Always properly use the proper child re-
straint to protect children¢
page 203.
In a collision, airbags must inflate within the
blink of an eye and with considerable force .
The supplemental airbags can cause injuries if
the dr iver or the front seat passenger is not
seated properly . Therefore in order to he lp the
a irbag to do its job, it is important, both as a
d river and as a passenger to sit prope rly 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
comp letely and provide supp lemental protec­
tion in ce rtain frontal collisions¢
page 164,
Proper occupant seating positions.
F or detai ls
on the operation of the seat adjustment con­
t rols ¢
page 75.
It's especially important that children are
properly restrained ¢
page 203.
There is a lot that the driver and the passen­
gers can and must do to help the individua l
safety features installed in your A udi work to­
gether as a system.
Proper seat ing pos ition is important so that
the front airbag on the driver s ide can do its
job. If yo u have a physical impa irment or con- dition that prevents you from sitting properly
on the driver seat with the safety belt properly
fastened and reaching the pedals , or if you
have concerns with regard to the function or
operation of the Advanced Airbag System ,
please contact your author ized Audi dealer or
qualified workshop, or call Audi Customer Re­
lations at 1-800-822-2834 fo r poss ible modi­
ficat ions to your veh icle.
When the airbag system deploys, a gas gener ­
ator will f ill the a irbags, break open t he pad­
ded cove rs, and inflate between the steering
whee l and the dr iver and between the instru­
ment pane l and the fron t passenger. The a ir­
bags will deflate immediately after dep loy­
ment so that the front occupants can see
t h rough the windshie ld again witho ut inter­
ruption .
All of th is takes p lace in the b link of an eye, so
fast that many peop le don't even realize tha t
the airbags have deployed. The airbags a lso
inflate with a great dea l of force and nothing
shou ld be in their w ay when they deploy.
Front airbags in combination with properly
worn safety belts slow down and lim it the oc ­
cupant's forward movement . T ogether they
help to prevent the drive r and front seat pas­
senger from hitting pa rts 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. A irbags do not
protect the arms or the lower parts of the
body.
Both front airbags wi ll not inflate in all fronta l
collisions . The triggering of the airbag system
depends on the vehicle dece lerat ion rate
caused by the co llision and registered by the
electron ic control unit. If th is rate is below
the reference value programmed into the con ­
t rol unit , the airbags will not be trigge red,
even though the car may be badly damaged as
a res ult of the co llision . Ve hicl e damage, re­
pair costs or even the lack of ve hicle damage
is not necessari ly an indication of whether an
airbag shou ld inflate or not .
IJll-

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Since the circums tances will vary considerab ly
between one collision and another , it is not
possible to define a range of veh icle speeds
that will cover every possible k ind and angle
of impact t hat w ill always t rig ger the a irbags .
Important factors include, for example, the
nature (hard or so ft) of the object which the
car h its, the ang le of impact, vehicle speed ,
etc. The front airbags will a lso not inflate in
side or rear collisions, or in ro ll-overs .
Alw ays rememb er: Airbags will deploy only
once, and only in certa in kinds of co llisions.
Your safety belts are always there to offe r pro­
tect ion in those s ituations in which airbags
are not supposed to deploy , or when they have
a lready deployed ; for example , when your ve­
hicle strikes or is struck by another vehicle af­
ter the first co llision .
This is just one of the reasons why an a irbag is
a supp lementary restraint and is not a s ubsti ­
tute for a safety belt . The airbag system
works most effectively when used with the
safety belts. Therefore, always properly wear
your safety belts ¢
page 173.
A WARNING
Sitting too close to the steer ing whee l or
instrument panel will dec rease the effec­
tiveness of the airbags and will inc rease
the risk of pe rsonal injury in a co llision .
- Never sit closer than 10 inches (2S cm)
to the stee ring wheel or instr ument pan­
el.
- If you cannot sit more than 10 inches
( 2 5 cm) from the steer ing whee l, investi­
ga te whethe r adaptive equipment may
be available to help you reach the pedals
and increase your seating distance from
the steering wheel.
- If you are unrestrained, lean ing forward,
sitting sideways or out of position in any
way, yo ur risk of inj ury is much higher.
- You w ill 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.
A irbag system 183
-To reduce the risk of injury when an air­
bag inflates, always wear safety belts
properly ¢
page 177, Safety belts.
-Always make certain that ch ild ren age 12
or younger a lways ride in the rear seat. If
children are not properly restrained, they may be severe ly inju red or killed when an
airbag inf lates .
- Never let ch ildren ride unrestra ined or
improperly restrained in the vehicle. Ad ­
just the front seats prope rly .
- Never ride with the back rest reclined .
- Always sit as far as possible from the
steer ing whee l or the instrument pane l
¢page 164.
-Always sit upright with 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 f loor in front of the seat to
he lp preven t serio us in ju ries to the legs
and h ips if the airbag infla tes.
- Never recline the front passenger 's seat
to transport objects . Items can a lso
move into the area of the s ide a irbag or
the front a irbag du ring bra king or in a
sud den maneuve r. Obje cts near the air ­
bags can become projectiles and cause
in jur y when an airbag inflates.
A WARNING
Airbags that have de ployed in a crash must
be replaced.
- Use on ly orig inal equipment airbags ap­
proved by Aud i an d installed by a trained
technician who has the necessary too ls
and d iagnost ic equipment to properly re­
place any airbag in your vehicle and as­
sure system effectiveness in a crash .
- Never perm it salvaged or recycled air­
bags to be installed in your vehicle . •
•

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conditions is impossible in all conceiva­
ble situations that may happen during
the useful life of your vehicle.
- The Advanced Airbag System can deploy
in accordance with the "low risk" option
under the U.S. Federal Standard if a child
that is heavier than the typical one-year
old child is on the front passenger seat
and the other conditions for airbag de­
ployment are met.
- Accident statistics have shown that chil­
dren are generally safer in the rear seat
area than in the front seating position.
- For their own safety, all children, espe­
cially 12 years and younger, should al­
ways 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
208 as applicable at the time your vehicle was
manufactured.
The front Advanced Airbag System supple­ ments the safety belts to provide additional
protection for the driver's and front passeng­
er's heads and upper bodies in frontal crashes.
The airbags inflate only in frontal impacts
when the vehicle deceleration is high enough .
The front Advanced Airbag System for the
front seat occupants is not a substitute for
your safety belts . Rather, it is part of the over­
all occupant restraint system in your vehicle .
Always remember that the airbag system can
only help to protect you, if you are sitting up­
right, wearing your safety belt and wearing it
properly. This is why you and your passengers
must always be properly restrained, not just
because the law requires you to be.
The Advanced Airbag System in your vehicle
has been certified to meet the "low risk" re­
quirements for 3 and 6 year-old children on
the passenger side and very small adults on
the driver side. The low risk deployment crite­
ria are intended to help reduce the risk of in-
Airbag system 187
jury through interaction with the front airbag
that can occur, for example, by being too close to the steering wheel and instrument
panel when the airbag inflates.
In addition, the system has been certified to
comply with the "suppression" requirements
of the Safety Standard, to turn off the front
airbag for infants 12 months old and younger
who are restrained on the front passenger
seat in child restraints that are listed in the
Standard
~ page 205, Child restraints and
Advanced Airbags .
"Suppression" requires the front airbag on the
passenger side to be turned off if:
- a child up to about one year of age is re­
strained on the front passenger seat in one
of the rear-facing or forward-facing infant
restraints listed in Federal Motor Vehicle
Safety Standard 208 with which the Ad­
vanced Airbag System in your vehicle was
certified. For a listing of the child restraints
that were used to certify your vehicle's com­
pliance with the US Safety Standard
~page 205,
-weight less than a thresho ld level stored in
the control unit is detected on the front pas­
senger seat .
When a person is detected on the front pas ­
senger seat, weighing more than the total
weight of a child that is about 1 year old re­
strained in one of the rear-facing or forward­
facing infant restraints (listed in Federal Mo­
tor Vehicle Safety Standard 208 with which
the Advanced Airbag System in your vehicle
was certified), the front airbag on the passen­ ger side may or may not deploy.
The
PASSENGER AIR BAG OFF light comes on
when the electronic control unit detects a to­
tal weight on the front passenger seat that 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 control
unit and can deploy if the control unit senses
an impact that meets the conditions stored in
its memory. ..,. •
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-Always make sure the forward-facing
seat has been des igned and certified by
its manufacturer for use on a front seat
with a passenger front and side airbag .
- Never put the forward-facing child re­
straint up aga inst or very near the instru­
ment panel.
- Always move the passenger seat into its
rearmost position in the seat's fore and
aft adjustment range, as far away from
the a irbag as poss ible, before insta lling
the fo rward -facing child restraint . T he
b ack res t m ust be adjus ted to an upr igh t
posit ion.
- Make su re that the
PASSENGER AIR BAG
OFF
light comes on and s tay s on all the
t ime w henever the i gnition is switched
on .
Advanced Airbag System components
The front passenger seat in your vehicle has a
l ot of very important parts of the Advanced
Airbag System in it. These parts include the
weight-sens ing mat, sensors, wiring, brack­
ets, and more . The function of the system in
the front passenger seat is checked by the
e lectronic control un it when the ignit ion is on .
The control un it mon itors the Advanced Air ­
bag Sys tem and turn s the a irbag i ndica tor
light on when a ma lfunction in t he system
components is detected . The function of the
airbag indicator light is described in greater
deta il below. Because the front passenger
seat contains important parts of the Ad­
va nced A irbag System, you must take care to
prevent it from being damaged . Damage to
the seat may p revent the Advanced A irbag for
the front passenger seat from doing its job in
a crash .
The front Advanced Airb ag System
consists of the following:
- Crash senso rs in the front of the veh icle that
measu re ve hicle accelera tion/decele ra ti on
to provide info rm ation to the Advanced Air ­
bag System abo ut the severity of the crash.
A irbag system 189
-An elect ron ic cont ro l unit, with integrated
crash sensors for front and side impacts .
The control un it "decides" whether to f ire
the front a irbags based on the informat ion
received from the crash sensors. The control
unit also "decides" whether the safety belt
prete nsione rs shou ld be act iva ted.
- An Advanced A irbag w it h gas generator for
the driver inside the steering wheel hub .
- An Advanced A irbag w ith gas generator in­
side the instrument pa nel for the front pas­
senge r.
- A weight-sensing mat under the upholstery
padding of the front passenge r seat cushion
that measures the to tal weight o n the seat.
The informat ion reg iste red is sent continu­
ously to the elect roni c con trol u nit to regu­
la te deployment of the front Adv anced Air­
bag on the passenger side .
- An airbag moni tori ng sys tem and ind ic a tor
light in the instr ument cluster
q page 193.
- The PASSENGER AIR BAG OFF ligh t comes
on and st ays on in the cen ter o f th e ins tru­
ment panel
q page 193, fig . 211 and tells
you whe n the front Advanced Airbag on the
passenger side has been tu rned
off .
-A sensor below the safety be lt latch fo r the
front seat passenger to meas ure the tension
on the safety be lt . The tension on the safety
be lt and the weight registered by the
weight-sensi ng mat he lp the control unit
"decide" whether the front a irbag for the
front passenge r seat should be turned
off or
not
q pag e 184, Child restraints on the
front seat -some important things to
know.
- A senso r in the safety be lt latch fo r the d riv­
er a nd fo r the fro nt sea t passenger tha t
senses w hethe r that safe ty belt is latche d or
no t and transmi ts this informa tion to the
electronic contro l unit.
.&_ WARNING
Damage to the front passenger seat can
prevent the front airbag from work ing
properly .
-
•
•

192 Airbag system
- when the weight on the front passenger
seat as sensed by th e Advanced Airbag Sys­
tem indicates that the front airbag on the
passenger side has to be turned off by the
electronic control unit (the
PASSENGER 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 their body too close to the area where
the airbags are located.
- Occupants who are unbelted, out of posi­
tion 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 184.
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 Ad­
vanced 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 because of exceptional circumstan­
ces and the
PASSENGER AIR BAG OFF
light does not come on and stay on, im­
mediately 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
increase the risk of injury in a crash by in­
terfering with the way the airbag unfolds
or by being pushed into you as the airbag inflates .
- Never hold things in your hands or on
your lap when the vehicle is in use.
- Never transport items on or in the area
of the front passenger seat. Objects
could move into the area of the front air­
bags during braking or other sudden ma­
neuvers and become dangerous projec­
tiles that can cause serious personal in­
jury if the airbags inflate.
- Never place or attach accessories or oth­
er objects (such as cupholders, tele­
phone brackets, large, heavy or bulky ob­
jects) on the doors, over or near the area marked "AIRBAG" on the steering wheel,
instrument panel, seat backrests or be­
tween those areas and yourself . These
objects could cause injury in a crash, es­
pecially when the airbags inflate.
- Never recline the front passenger's seat
to transport objects. Items can also
move into the area of the side airbag or
the front airbag during braking or in a
sudden maneuver. Objects near the air­
bags can become projectiles and cause
injury, particularly when the seat is re­
clined.
- Never tilt the front passenger seat back­
rest forward when the vehicle is moving.
An inflating airbag will force the back­
rest backward and can injure rear seat oc­
cupants.
A WARNING
The fine dust created when airbags deploy
can cause breathing problems for people
with a history of asthma or other breath­ ing conditions.
-
-To reduce the risk of breathing problems,
those with asthma or other respiratory
....__ c_ o_ n_ d_ it_ i_o _ ns_ s_ ho _u_ l_ d ....:g:_ e_ t_ f_re _s_ h _ a_ i_r _ri ..::g :....h _t __
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196 Airbag system
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 installed at
many different places on your Audi. Installing,
removing, servicing or repairing a part in an
area of the vehicle can damage a part of an
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 cu­ pholders 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
moistened with plain water . Solvents 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.

204 Child Saf ety
- Always install rear-facing child safety
seats on the rear seat.
- If you must install a rearward facing
ch ild safety seat on the front passenger
seat in exceptiona l circumstances and
the
PAS SENGER AIR BA G OFF light does
not come on and stay on, immed iately
install the rear-facing child safety seat in
a rear seating posit ion and have the air­
bag system inspec ted immediately by
yo ur Audi dealer.
_& WARNING
If, in exceptional c ircumstances, you mus t
install a forward -facing child restra int on
the front passenger's seat:
- Always make su re the forward-fac ing
seat has been designed and certified by
its manufacturer for use on a front seat
with a passenger front and side airbag.
- Always follow the man ufacturer's in­
struct ions provided with the child safety
seat or carrier.
- Always move t he passenger seat into its
rearmost position in the seat 's fore and
aft adjustment range, as far away from
the a irbag as poss ible before installing
the ch ild restraint. The backrest must be
adjusted to an upr ight position .
- Always make sure that the
PASSENGER
AIR BAG OFF
light comes on and stays
on all the time whenever the ignition is
switched on.
(D Tips
Always rep lace child rest raints that were
installed in a vehicle during a crash. Dam­
age to a child rest raint that is not visible
could cause i t to fail i n another collisio n
si tua tion.
Advanced front airbag system and
children
Your veh icle is equipped with an "Advanced
A irbag System" in compliance w ith United
States Federal Motor Vehicle Safety Standard (FMVSS) 208 as applicable at the time you
r
vehicle was manufacture d.
T he Adv anced Airbag system in yo ur vehicle
has been certified to mee t the "low-risk" re­
quirements for 3-and 6-year old children on
the passenger side and sma ll adults on the
drive r side. The low r is k dep loyment cr iteria
are intended to red uce the risk of in jury
through interact ion w it h the airbag that can
occur, for example, by being too close to the
steering wheel and instrument panel when
the a irbag inflates . In addition, the syst em
has been ce rtified to comply wit h the "sup­
pression" re quirements o f th e Safety Sta nd­
ard, to t urn off the fron t airbag for infan ts up
to 12 months who are res trained on the front
passenger seat in child restraints that a re list­
ed in the Standard.
E ven though your veh icle is eq uipped wit h an
Advanced Airbag system , a ll children, espe­
cia lly those 12 years and yo unger, should a l­
ways ride in the back seat properly restrained
for their age and size. The airbag on the pas­
senger side makes the front seat a potentially
dangerous place for a ch ild to ride . The front
seat is not the safest p lace for a ch ild in a for­
ward-fac ing ch ild safety seat. It can be a ve ry
dange rous place fo r an infan t or a large r child
i n a rea rward-f acing se at.
Advanced Airbags and the weight­
sensing mat in the front seat
The Advanced A irbag System in your vehicle
detects the presence of an infant or child in a
c h ild restra int on the front passenge r seat us­
i ng the weig ht-sens ing mat in the seat cush ­
ion and the sensor be low th e safe ty belt latch
o n the front passenge r seat that measures t he
tens ion on the s afety be lt.
T he we ight -sensi ng mat measures total
we ight of t he chi ld and the ch ild safety seat
and a c hild b la nk et on the front passenger
seat. The we igh t on the fron t pa sse nger se at
is re late d t o the desig n of the ch ild res trai nt
and its "f ootprint", the s ize and shape o f the
bottom of the chi ld restraint as it sits on the .,..

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Intelligent technology Notice about data
recorded by vehicle
control modules
Your vehicle is not equipped with an Event Da­
ta Recorder (EDR), installed by some manu­
facturers for the express purpose of capturing
data for retrieval after an accident or crash
event. EDRs are sometimes called "crash re­
corders".
Some state laws restrict the retr ieval or down­
loading of data stored by EDRs that were in­
stalled in a vehicle for the express purpose of
retrieving data after an accident or crash
event without the owner's consent.
Although your vehicle is not equipped with an
EDR, it is equipped with a number of electron­
ic control modules for various vehicle systems
such as, for example, engine function, emis­
sion control, as well as for the airbags and
safety belts.
These electronic control modules also record
vehicle-related data during norma l vehicle op­
eration for diagnostic and repair purposes.
The recording capacity of the electronic con­
trol modules is limited to data (no sound is re­
corded) and only a small amount of data is ac­
tually recorded over a very limited period of
time and stored when a system fault or other
condition is sensed by a control unit. Some of
the data then stored may relate to vehicle
speed, direction, braking as we ll as restraint
system use and performance in the event of a
crash or other condition. Stored data can only be read and downloaded with special equip­
ment.
Electronic Stabilization
Control (ESC)
Description
The Electronic Stabilization Control (ESC) rein­
forces driver safety. It reduces the risk of slip ­
ping and improves driving stability. ESC de­
tects critical s ituations such as the vehicle
Intelligent technology 223
oversteering and understeering or the whee ls
spinning . The vehicle is stabilized by applying
the brakes or reducing eng ine torque . Once
the ESC is active, the indicator light
GI blinks
in the instrument cluster.
The following systems are integrated in the
ESC:
Anti-lock brake system (ABS)
ABS prevents the wheels from locking up
when brak ing. The vehicle can sti ll be steered
even during hard braking. Apply steady pres­
sure to the brake peda l. Do not pump the ped­
al. A pulsing in the brake pedal indicates that
the system is helping you to brake the vehicle.
Brake assist system
The brake assist system can decrease braking
distance.
It increases braking power when the
driver presses the brake peda l quickly in emer­
gency situations. You must press and hold the
brake pedal until the situation is over. In
vehicles with adaptive cruise control*, the
brake assist system is more sensitive if the
distance detected to the vehicle ahead is too
small.
Anti-slip regulation (ASR)
ASR reduces engine power when the drive
wheels begin to spin and adapts the force to
the road conditions. This makes it easier to
start, accelerate and dr ive up hi lls.
Electronic differential lock (EDL)
The EDL brakes wheels that are spinning and
transfers the drive power to the other wheels.
This function is not available at higher speeds .
In extreme cases, EDL automatically switches
off to help keep the brake on the braked wheel
from overheating. EDL will switch on again au­
tomatically when conditions have returned to
normal.
A WARNING
- The ESC and its integrated systems can­
not overcome the laws of physics. This is
especially important on slippery or wet
~
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226 Intellig ent technol ogy
firm ly a few times from a mode rately high
speed ¢.&. .
Faults in the brake system
If you should notice a sudden increase in
brake peda l travel, t hen one of the two bra ke
circ uits may have failed ¢.&. .
Low brak e flu id le vel
Malfunct ions can occur in the brake system if
the brake fluid level is too low . T he brake fluid
l eve l is monitored electronically .
Bra ke boo ster
The brake booster increases the pressure that
you generate w ith the brake pedal. It only op­
erates while the eng ine is running ¢,&. .
Brake lining we ar sta tu s
Brake lining wear may be checked by visual in­
spection of the condition of the brake pads
through the openings in the wheel. If neces­
sary, the wheel may be removed for this in­
spection ¢
page 307, Changing a wheel.
A WARNING
- You should perfo rm bra king maneuve rs
for the p urpose of clean ing the b rake
system on ly if road condit ions permit.
Other road users must not be put at risk -
you may cause an accident!
- Be fore descending a steep grade, reduce
speed and shift transmission into a lower
gear or lower driving range. Do not ride
the brakes or hold the pedal down too long or too often. This could cause the
brakes to get hot and dimin ish braking
efficiency .
- Do not "ride the brakes" by resting your
foot on the pedal when you do not intend
to brake . Th is may cause the brakes to
overheat, premature wear and inc reased
stopping distance.
- Under certain climat ic and operating
condit ions such as passing through wa­
ter, driving in heavy ra in or after wash ing
the vehicle, the effect iveness of the
brakes can be reduced . In winter, ice can accumu
late on the brake pads, linings,
discs and drums. Carefully app ly brakes
for a test. Brakes will dry and ice coat­ ings w ill be cleaned off after a few care­
ful brake applicat ions .
- Driving for an extended period of time on
salt-covered roads without using your
brakes can also affect braking efficiency .
Clean off accumulated salt coating from
b rake discs and pads with a few ca reful
brake applications.
- If you damage the front spoiler, or if you
i n stall a diffe rent spoiler, be s ure the a ir
f low to the front brakes is not obs truct­
ed . Otherwise the brake system could
overheat reducing the effectiveness of
the entire brake system .
- Fai lure of one brake circuit will impai r
the braking capability resulting in an in­
creased stopping distance . Avoid driving
the vehicle and have it towed to the near­
est authorized Audi dea ler or qualified
workshop .
- Never let the ve hicle roll to a stop with
the engine shut off.
- If the brake booster is not working, the
brake peda l must be pressed cons idera­
b ly harder to make up for the lack of
booster assistance.
Servotronic - advanced power steering system
The power steering systems uses the power of
the running engine to allow precise steering
with Little effort.
T he advanced Servotronic power steer ing sys ­
tem senses the road speed and electronica lly
adjusts power assistance to provide comforta­
ble and safe steering response exactly match­
ed to the vehicle speed.
Power s teer ing will not work if the engine is
off. As a result, the steering wheel will be hard
to turn.
T he powe r steering fluid level is checked d ur-
ing the sched uled maintenance services . ..,.

M N
0 ...J
'SI: ,...., \!) ..,.,
,...., ..,., ,....,
(D Note
If there is an electronic malfunction, ser­
votronic
w ill still function like a conven­
tional power steer ing system, providing a
constant steer ing support force that is no
longer proportionate to the vehicle speed.
This is most noticeable when turning the
steer ing whee l at low speeds (for examp le
when parking), -more effo rt will be re­
qui red than usual.
- Be awa re of the different than usual
stee ring response and adjust your stee r­
i ng force accord ingly .
- Have the problem checked and set right
by an Aud i dealer as soon as possible .
(D Tips
-When the engine is runn ing, never hold
the steer ing whee l turned a ll the way to
the right or to the left for longer than 15
seconds. The power s teer ing p ump w ill
overheat the hydraulic fluid if you keep ho lding the steering whee l turned a ll the
way . This is likely to damage the power
steering system .
- If the power steer ing system should fai l
entirely, or if the engine is not running
(for example, while being towed), you
will still be ab le to steer the vehicle .
However,
considerably more effort will
be required to do so .
- If the power steering system should
have a leak, or is not functioning proper­
l y, contact your authorized Aud i dealer
i mmediately.
- The power steering system requires a
spec ially formulated hydraulic fluid . T he
power steer ing reservo ir is the one locat­
ed farthest to the rear on the left side o f
the engine compartment
~ page 258.
The correct fluid leve l in the reservoir is
important for proper functioning of the
power steer ing .
Int ellig ent technolog y 22 7
Driving with your
quattro
With all-wheel drive , all four wheels are driv­
en .
Gener al info rmation
With all-wheel drive, power is distributed to
all four wheels. This happens au toma tically
depending on your driving style and the road
cond it ions at the time . See also
~ page 223.
Winter t i res
When d riving in the winter, your vehicle with
a ll-wheel drive has an advan tage, even with
regular tires. In winter road conditions it may
be advisable to mount winter tires (or all -sea ­
son tires) for improved driveability and brak­
ing: these tires must be mounted on
a ll four
wh eels. See also ~ page 298, Winter tires.
Tire ch ains
Where tire chains are mandatory on certain
roads, this normally also applies to veh icles
with all-wheel drive~
page 299, Snow
chains .
Replacing whee ls/tire s
Vehicles with all-wheel drive must always
have tires of the same s ize . Also avoid tires
with different tread depths . For deta ils see
page ~
page 291, New tires and replacing
tires and wheels.
.8, WARNING
A lways adj ust yo ur dr iv ing to road and t ra f­
fic conditions . Do not let the extra sa fety
afforded by all-wheel drive tempt you into
taking extra risks.
- Altho ugh the a ll-wheel drive is very ef ­
fective, always remember that braking
capacity is limited by tire traction . You
should therefore not drive at excessive
speeds on icy or slippery road surfaces.
- On wet road surfaces, be careful not to
drive too fast because the front wheels
could begin to slide on top of the water
(aquaplaning). If th is should occur, you •
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