2012 AUDI A3 Check

134 Airbag sys te m
Advanced Airbag System in your vehicle was
certified.
I f the front passenger seat is not occ upied,
the front airbag will not deploy, and the
PAS·
SENGER AIR B AG OFF
light will stay on. Nev ­
er insta ll a rearward-facing child restraint on
the front passenger seat, the safest place for
a child in any kind of child restraint is at one
of the seat ing positions on the rear seat
c:> page 123, Child restraints on the front seat
- some important things to know
and
c:> page 143, Child Safety .
If the PASSENGER AIR BAG OFF light comes
on
when one of the conditions listed above is
met, be sure to check the light regularly to
make certa in that the
PAS SENGER AIR BAG
OFF
light stays on cont inuous ly whenever the
i gnit ion is on.
If the PAS SENGER AIR BAG
OFF
li ght does not appear on and does not
stay on all the time, stop as soon as it is safe
to do so and
- react iva te the system by turning the ignition
off and then turning it on again;
- remove and re insta ll the chi ld restraint.
Make su re that the child res traint is properly
insta lled and that the safety be lt for the
front passenger seat has been correct ly
ro uted throug h the child restraint as descri­
bed in the chi ld restraint man ufacturer's in­
structions;
- make sure that the convertible locking fea ­
ture on the safety be lt for the front passen­
ger seat has been activated and that the
safety belt has been pulled tight. The belt must not be loose or have loops of slack so
t h at the sensor below the safety be lt latch
on the sea t can do its job
¢ page 152.
- make sure that th ings that may increase the
we ight of t he chi ld and child safety seat are
not be ing tra nspo rted on the front passen ­
ger seat;
- make su re that the safety be lt tension sen­
so r is not b locked. Shake t he safety be lt
l atch on the front passenger seatbac k and
forth;
- If a st rap or te ther is being used to tie the
child safety seat to the front passenger seat, make sure that
it is not so tight that it
causes the weight-sensing mat to measure
more weight than is act ually on the seat.
If the PASSENGER AIR BAG OFF light still
does not come on
and does not stay on con ­
tin uous ly (when the ignition is switched on),
- t ake the child res train t off the front passen-
ge r seat and ins tall it properly at one of the
rear seat positions. Have the airbag system
inspected by your authorized Audi dea ler
immed iate ly .
- move the child to a rear seat position and
make sure t hat the c hild is properly restra in­
ed in a ch ild restra int that is appropriate for
its size and age.
The
PASSENGER AIR BAG OFF light should
NOT come on when t he 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 wh ile driving, un­
der these c ircumstances, 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
c:> page 104, Proper seating position for the
driver,
- the adult is not tak ing weight off the seat by
holding on to the passenger assist handle
above the fron t passenger door or s upport­
ing their weight on the armres t,
- t he safety belt is be ing properly wo rn and
t hat the re is not a lot o f slack in the safety
be lt webb ing,
- accessory seat covers or cushions or othe r
t hings tha t 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 been left in
the safety belt latch for the front passenger
seat.
In add ition to the
PASSENGER AIR BAG OFF
light in the center of the instrument panel,
the message
PASSENGER AIR BAG OFF or

150 Child Saf ety
than 20 lbs (9 kg) up to 40 lbs. (18 kg) must
a lways be properly restrained in a chi ld safety
seat certified for the ir s ize and weight
c::> fig. 140 and c::> fig. 141.
The airbag on the passenger side makes the
front seat a potentially dangerous place for a
chi ld to r ide. T he front seat is not the safest
p lace for a child in a forward-facing child safe­
ty seat. It is a very dangerous place for an in­
fant or a larger child in a rearward -fac ing seat .
A WARNING
Not using a ch ild safety seat, using the
w rong ch ild safety seat or improper ly in­
stall ing a child res traint increases the risk
of serious person al injury and de ath in a
co llision or other eme rgency s ituation.
- Children on the front seat of any car,
even w ith Adv anced A irbags, can be seri­
o usly inju red or even killed when an a ir­
bag inflates. A child in a rearward-facing
child safety seat installed on the front
passenger seat w ill be seriously injured
and can be k illed if the front a irbag in­
flates -even with an Advanced Airbag
System .
- The inflating a irbag will hit the child
safety seat or infant car rier with g reat
force and w ill smash the ch ild safety seat
and child against the backrest, cente r
armrest, door or roof.
- Always install rear-facing child safety
seats on t he rear sea t.
- If you must install a rearward facing
child safety seat on the front passenger
sea t be cause of ex cep tional circ ums tan­
c es and the
PASSENGER AIR BAG OFF
ligh t does no t come on and stay on, im­
me diately install the rea r-facin g child
safety seat in a rear seating position and
have the airbag system inspected by your
Audi dealer.
- Always read and heed all WARNI NGS
whenever using a child rest rained in ave­
hicle is being used
c::> page 113, Safety
belts,
c::> page 122, Airbag system and
c::> page 143, Important things to know .
A WARNING
If exceptional circumstances require the
use of a fo rward-facing child restraint on
the front passenge r's sea t, the child's safe­
ty and well-being require t hat the follow­
i ng spe cial preca utions be ta ken:
- Make sure t he forward-facing seat has
been designed and cert ified by its man u­
f a cturer fo r use on a front seat with a
p assenger front and side airbag.
- Always follow the manufacturer' s in­
s truc tions prov ided with t he ch ild safety
se at o r infant ca rr ier.
- Always move the front passenger seat in­
to the re armos t posi tion of the passen­
ge r seat's fo re and aft adjustment range,
an d as far away from the airbag as possi­
b le before installing the ch ild restraint.
- Always make sure that no thing prevents
the front passenger 's seat from being
moved to the rea rmost pos ition in its
fore and aft ad justment range .
- Always make sure the bac krest is in an
upright pos ition.
- Make sure t hat the
PASSENGER AIR BAG
OFF
li ght comes on and stays on all the
time whenever the ignit ion is switched
on.
- If the light does not stay on, perform the
checks
c::> page 133, Monitoring the Ad­
vanced Airbag System.
- Ta ke the chi ld restraint off the front pas­
senger seat and install it properly at one
of the rear seat positions if the
PASSEN ­
GER AIR BAG OFF
l ight does not s tay on
wheneve r the ignit ion is switched on.
-

152 Child Safety
the child's body and the front of the passen­
ger compartment , the airbag can inflate com­
pletely and provide supplemental protection
in certain frontal collisions .
A WARNING
Not using a booster seat, using the boos­
ter seat improperly, incorrectly installing a
booster seat or using the vehicle safety
belt improperly increases the risk of seri­
ous personal injury and death in a collision
or other emergency situation. To help re­
duce the risk of serious personal injury
and/or death:
- Always make sure to position the should­
er portion of the three-point belt over
the middle of child's shoulder.
- Never let the shoulder portion of the belt
rest against or across the neck , face,
chin, or throat of the child.
- Always make sure the lap belt portion of
the three-point belt is worn snug and
passes as low as possible across the
child's pelvis. Never let the belt pass over
the soft abdomen.
- Failure to properly route safety belts
over a child's body will cause severe inju­
ries in an accident or other emergency
situation
c;,page 113.
-The rear side of the booster seat should
be positioned as close as possible to the
backrest on the vehicle seat . Adjust or re ­
move the rear seat head restraint if it is
difficult to install the child seat with the
head restraint in place
¢page 65. Install
the head restraint again immediately
once the child seat is removed. Driving
without head restraints or with head re­
straints that are not properly adjusted
increases the risk of serious or fatal neck
injury dramatically.
- Children on the front seat of any car,
even with Advanced Airbags, can be seri­
ously injured or even killed when an air­
bag inflates .
- Never let a child stand or kneel on any
seat, for example the front seat.
-
- Never let a child ride in the cargo area of
your vehicle.
- Always remember that a child leaning
forward, sitting sideways or out of posi­
tion in any way during an accident can be
struck by a deploying airbag. This will re­
sult in serious personal injury or death .
- If you must install a booster seat on the
front passenger seat because of excep­
tional circumstances the
PASSENGER
AIR BAG OFF
light must come on and
stay on, whenever the ignition is switch­
ed on.
- If the
PASSENGER AIR BAG OFF light
does not come on and stay on, perform
the checks described
c;, page 133, Moni­
toring the Advanced Airbag System.
- Take the child restraint off the front pas­
senger seat and install it properly at one
of the rear seat positions if the
PASSEN­
GER AIR BAG OFF
light does not stay on
whenever the ignition is switched on.
- Always read and heed all WARNINGS
whenever using a child restrained in ave­
hicle is being used
c;, page 113, Safety
belts,
c;, page 122, Airbag system and
c;, page 143, Important things to know.
Installing a child safety
seat
Securing a child safety seat using a
safety belt
Safety belts for the rear seats and the front
passenger can be locked wi th the convertible
locking retractor to properly secure child
safety seats.
The safety belts emergency locking retractors
for the rear seats safety belts and for the
front passenger's seat safety belt have a con­
vertible locking retractor for child restraints.
The safety belt must be locked so that belt
webbing cannot unreel. The retractor can be
activated to lock the safety belt and prevent
the safety belt webbing from loosening up
during normal driving. A child safety seat can
only be properly installed when the safety belt
IJll-

is locked so that the child and child safety
seat will stay in place.
Always remember: Even though your vehicle is
equipped with an Advanced Airbag system, all
children , especially those 12 years and young­
er, should always ride in the back seat proper­
ly restrained for their age and size.
A WARNING
Improperly installed child safety seats in­
crease the risk of serious personal injury
and death in a collision.
- Always make sure that the safety belt re­
tractor is locked when installing a child
safety seat. An unlocked safety belt re­
tractor cannot hold the child safety seat
in place during normal driving or in a
crash.
- Always buckle the child safety seat firmly
in place even if a child is not sitting in it.
A loose child safety seat can fly around
during a sudden stop or in a collision.
- Always make sure that the rear seat
backrest to which the center rear safety
belt is attached is securely latched when­
ever the rear center safety belt is being
used to secure a child restraint.
- If the backrest is not securely latched,
the child and the child restraint will be
thrown forward together with the back­
rest and will strike parts of the vehicle
interior. The child can be seriously in­
jured or killed.
- Never install rear-facing child safety
seats or infant carriers on the front pas­
senger seat . A child will be seriously in­
jured and can be killed when the passen­
ger airbag inflates.
- 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 or infant carriers on the rear seat.
- Forward-facing child safety seats or in­
fant carriers installed on the front pas-
Child Safety 153
senger's seat may interfere with the de­
ployment of the airbag and cause serious
injury to the child.
- It is safer to install a forward-facing
child safety seat on the rear seat.
- Always read and heed all WARNINGS
whenever using a child restrained in ave­
hicle is being used
c=> page 143. Special
precautions apply when installing a child
safety seat on the front passenger seat
c=> page 12 3, Child restraints on the front
seat -some important things to know.
A WARNING
Always take special precautions if you
must install a forward or rearward-facing
child restraint on the front passenger's
seat in exceptional situations:
- Whenever a forward or rearward-facing
child restraint is installed on the front
passenger seat, the
PASSENGER AIR
BAG OFF
light must come on and stay on
whenever the ignition is switched on.
- If
the PASSENGER AIR BAG OFF light
does not come on and stay on, perform
the checks described
c=> page 133, Moni­
toring the Advanced Airbag System.
- Take the child restraint off the front pas­ senger seat and install it properly at one
of the rear seat positions if the
PASSEN­
GER AIR BAG OFF
light does not stay on
whenever the ignition is switched on .
- Improper installation of child restraints
can reduce their effectiveness or even
prevent them from providing any protec­
tion.
-An improperly installed child restraint
can interfere with the airbag as it de­ ploys and seriously injure or even kill the
child.
-Always carefully follow the manufactur­
er's instructions provided with the child
safety seat or carrier.
- Never place additional items on the seat
that can increase the total weight regis­
tered by the weight-sensing mat and can
cause injury in a crash.
~
•
•

As soon as the test is completed, the system
is in normal operating mode.
Switching off
E SP should normally be activated at all times
because this ensures optimum vehicle stabil i­
ty. In certa in situations, it might make sense
to a llow some slip . For example:
- Rocking the vehicle to free it when it is stuck
- Driving in deep snow or on loose ground
- Driving with snow cha ins
Press the
[!I button . The ESP indicator light I)
turns on and S tabil isat ion prog ram off ap­
pears in the d isp lay. ASR deact ivates com­
pletely and the stab ilizat ion effects from the
ESP system are lim ited.
S wi tc hing on
Press the [!I button again. The message S tab i·
li sa tion p rogram on
appears briefly in the dis­
play.
A WARNING
You should only sw itch the ESP off if your
driving ability and the traffic s ituation per­
m it. Please note that when ESP/ASR is de­
act ivated, the drive whee ls can sp in on icy
and slippe ry roads and the vehi cle can
break away - danger of skidding!
(j) Tips
If A udi magnetic ride* is malfunctioning,
the ESP may not switch off or it may
sw itch off automatically.
Braking
General information
What affects braking efficiency?
Operating condit ions and d riving habit s
The brakes on today's automobi les are st ill
subject to wear, depending largely on operat­
ing cond itions and dr iving habits
q .&. . On ve ­
hicles that are either driven mostly in stop­
and -go city traffic or are driven hard, the
brake pads should be checked by your author-
Int ellig ent technolog y 163
ized Audi dea ler more often than specified in
the
W arra nty & M aintenance booklet. Failure
to have your brake pads inspected can result
in reduced brake performance.
On steep slopes, you sho uld use the b raking
effect of the engine. This way, you prevent un­
necessary wear on the brake system. If you
must use your brakes, do not hold the brakes
down cont inuously. Pump the brakes at inter­
vals.
Noises may occur when braking depending on
speed, braking force and outs ide cond it ions
such as temperature and humidity.
Mo isture o r road sal t
If you are driving faster than SO mph (80 km/
h) and the windshield wipers are on, the brake
pads will briefly touch the brake discs in regu­
lar intervals so as to improve react ion time
when brak ing on wet surfaces. You, the driver,
will not not ice anything.
Under certain conditions, for example, when
driv ing through water or very heavy ra in, or
even after washing your veh icle, the braking
effect can be reduced due to moisture (or in
freez ing cond itions ice) on the brake pads. A
few cautious brake applications should dry off
the b ra ke pads or remove any ice coatings.
The effectiveness of the brakes ca n be reduced
when the vehicle is driven on a salt-cove red
road and the brakes are not used. l ikewise,
you clean off accumulated salt coating from brake d iscs and pads w ith a few cautio us ap­
plications o f the b ra ke
¢ .&, .
Corrosion
T here may be a tendency for di rt to b uild up
o n the brake pads and corros ion to fo rm on
the d iscs if the car is not d riven regu larly or
o nly for short tr ips w ith litt le use of the
brakes.
If the brakes a re not used frequently, o r if cor­
ros ion has formed on the discs, it is adv isable
to clean off t he pads and d iscs by braking
firmly a few times from a moderately high
speed ~.&. . .,.
•
•

164 Intelligent technolog y
Faults in the bra ke sys tem
If you should notice a sudden increase in
b rake peda l travel, then one of the two brake
circuits may have failed¢.& .
Low brake 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 moni to red electronica lly .
Bra ke lining w ear st atu s
Brake l ining wear may be checked by visual in­
spection of the condition of the brake pads
through the openings in the whee l. If neces­
sa ry, the wheel may be removed for this in ­
spection
¢page 236, Wheel change.
A WARNING
-You should perform braking maneuvers
for the purpose of cleaning the brake
system on ly if road conditions permit.
Other road users must not be put at risk -
you may cause an acc ident!
- Before descending a steep grade, reduce
speed and shift transmiss ion into a lower
gear or lower driving range . Do not ride
the brakes or hold the pedal down too long or too often. This cou ld cause the
brakes to get hot and dimin ish braking
efficiency.
- Do not "r ide the brakes" by resting your
foot on the pedal when yo u do not intend
to bra ke . This may cause the brakes to
overheat, premature wear and increased
stopping distance .
- Under certain climat ic and operating
condit ions such as passing through wa­
ter, driving in heavy rain or after washing
the vehicle, the effectiveness of the brakes can be reduced. In winter, ice can
accumulate on the brake pads, linings,
discs and drums . Carefully apply brakes
for a test . Brakes will dry and ice coat­
ings will be cleaned off after a few care­
ful brake applications.
- Driv ing for an extended period of time on
salt-covered roads w ithout us ing your
brakes can also affect braking efficiency . Clean off accumulated salt coating from
brake discs and pads with a few careful
brake applications.
- If you damage the front spoiler, or if you
install a different spoiler, be sure the a ir
flow to the front brakes is not obstruct­ ed. Otherwise the brake system could
overheat reducing the effectiveness of
the entire brake system.
- Failure of one brake circuit will impa ir
the braking capab ility result ing in an in­
creased stopping distance. Avoid driving
the vehicle and have it towed to the near­
est a utho rized Audi dea le r or q ualified
wo rkshop.
Brake booster '
The brake booster adds extra broking power.
The brake booster works with vacuum pres­
sure which is created only when the eng ine is
run ning ¢.&_ .
_&. WARNING
-Never let the vehicle roll to a stop with
the engine shut off.
- I f the b rake booster is not working, for
examp le when towing yo ur vehicle, or
because the brake booster has somehow
been damaged, the brake pedal must be
pressed conside rably harder to make up
for the lack of booster assistance.
Functioning of Anti-Lock Brake System
(ABS)
ABS prevents the wheels from locking up un­ der broking.
.
The ABS contributes effectively to vehicle con­
trol since it prevents the whee ls from
locking
when the brakes are applied. This means that
the vehicle remains steerable and is less likely
to sk id .
With ABS you do not need to pump th e
brake. Ju st hold the b ra ke pedal down.

However, do not expect that the ABS shortens
braking distance under
all circumstances.
When driving on grave l or on newly fallen
snow on top of icy surfaces, braking distance may be even longer, therefore, under these
circumstances, it is especially important that
you dr ive slowly and with great care .
How th e ABS syste m work s
An automatic check is made when a speed of
about 4 mph (6 km/h) is reached. When this
happens, a pumping noise can be heard .
If an individua l wheel begins to rotate too
slowly in relation to vehicle speed and tends
to lock, the ABS automatically reduces brake
pressure to prevent that wheel from locking.
This automatic adjustment process will cause
a
s light vib ration of the brake pedal and some
noises to alert you that vehicle speed must be
adapted to existing road and traff ic condi­
tions .
A WARNING
Although the ABS is very effective, always
remember that bra king capability is limit­
ed by t ire traction. Always adjust your dr iv­
ing speed according to the road and traffic
conditions . Do not let the extra sa fe ty af ­
forded bytheABStemptyou into taking
extra r isks. The ABS cannot overcome the
laws of physics.
(D Tips
- If ABS is not functioning properly, a
warning light will come on. See
¢ page 18.
- If a fault occurs in the ABS, the EDL is al ­
so not functioning . This is indicated by
the ABS warning light.
Brake assistant
The broke assistant is designed to achieve the
optimum broking effect .
The brake assistan t helps to increase the ef­
fective
b raking power and thus to achieve a
shorter stopping distance . If the driver
Int ellig ent technolog y 165
presses the brake peda l very quick ly, the brake
assistant automatically boosts the braking
force to the max imum level, up to the po int
where the anti-lock brake function (ABS) inter­
venes to stop the whee ls from locking. You
shou ld then keep the brake peda l pressed un ­
t il the vehicle has braked to the required
speed. The brake assistant switches itself off
as soon as you release the b ra ke peda l.
The brake ass istant wi ll not be operative if
there is a ma lfunction in the ABS.
A WARNING
P lease remember that the acc ident risk a l­
ways increases if you drive too fast, espe­
cially in corners or on a slippe ry road, o r if
you follow the vehicle ahead of yo u too
closely . An increased accident risk cannot
be compensated even by the brake assis ­
tant, so always mainta in a safe speed.
Electro-mechanical
power assist
The electro-mechanical power assist helps
the driver when steering .
The degree of power assist is electronically
matched to vehicle speed .
The power steering system assists the driver
so that he can steer the vehicle with reduced physical effort.
Power steering will not work if t he engine is
off . As a result, the steering wheel will be hard
to turn .
A WARNING
If the system deve lops a problem, you
must seek qualified professiona l assis­
tance.
(D Note
If there is an e lectronic malfunction, ser­
votronic
will still function like a conven-
tiona l power steering system, providing a
constant steering support force that is no
-
l onge r proportionate to the vehicle speed. ..,.
•
•

166 Intelligent technolog y
This is most noticeab le when turning the
steering whee l at low speeds (for examp le
when parking), -more effort will be re­
quired than usual.
- Be aware of the different than usual
steering response and adjust your steer­
i ng force accord ingly.
- Have the problem checked and set right
by an author ized Audi dealer as soon as
possible.
- If a steering malfunct ion occurs, this is
s ignaled with the
ts ~ or .• indicator
li ghts and a warning tone, see.
(D Tips
- If the power steering system shou ld fail,
or if the eng ine is not running (for exam­
ple, while being towed), you will st ill be
able to steer the veh icle. However, more
effort will be req uired to do so.
- If the power steering system is not func­
tioning properly, co ntact your authorized
A udi dealer immediate ly.
Driving with your
quattro ®
Appl ies to vehicles: with All Whee l Drive
With All Wheel Drive, all four wheels are driv ­
en.
General information
W ith All Whee l Dr ive, power is d istributed to
a ll fo ur wheels . This happens automa tic a lly
depending on your driv ing sty le and the road
conditions at the time . See also
¢ page 161.
Winter tires
When dr iv ing in the w inte r, your ve hicle w it h
A ll Whee l Drive has an advantage, even wi th
reg ular t ires. In win ter road condi tions it may
be adv isable to mo unt winter tires (o r all-sea ­
son tires) for improved driveability and b rak­
ing: these tires must be mounted on all four
wheels. See also ¢ page 22 7, Winter tires.
Snow chains
Where snow chains are manda to ry on ce rtain
roads, this norma lly also app lies to ve hicles
with all-wheel drive¢
page 228, Snow
chains.
Replacing wheels /tires
Vehicles with A ll Wheel D rive must a lways
have t ires o f the same s ize. A lso avoi d tires
with different t read depths . For deta ils see
page
¢ page 223, New tires and replacing
tires and wheels .
Off-Road driving?
Your Audi does no t have enough g round clea r­
ance to be used as an off-road vehicle .
It is
therefore bes t to avoid rough tracks a nd un ­
even terrain as much as possib le . Also refer to
¢ page 171.
A WARNING
-
Always ad just your dr iv ing to road and traf-
f ic conditions. Do not let the extra safety
afforded by the all-wheel dr ive tempt you
i nto ta king extra risks.
- Although the quattro ®all-wheel dr ive is
very effect ive, a lways remember that
b rak ing capac ity is limited by tire trac­
tion . You should therefore not d rive at
excessive speeds on icy or slippe ry road
sur faces.
- On wet road surfa ces, be careful not to
d rive too fast because the front whee ls
could begin to slide on top of the water
(hydroplaning). If this sho uld occ ur, you
will have no warning from a s udden in ­
crease in eng ine speed as w it h a front­
wheel d rive veh icle. Always drive at
speeds which are adjusted to the road
conditions - risk of c rash!