ESP AUDI TT COUPE 2009 Workshop Manual

Booster seats
Properly used booster seats can help protect children
weighing between about 40 lbs. and 80 lbs. (18 kg and 36
kg) who are less than
4 ft. 9 in. tall.
Fig. 120 Rear seat :
child properly
restrained in a booster
seat
The vehicle's safety belts alone will not fit most children
until they are at least 4 ft. 9 in. tall and weigh about 80 lbs.
(36 kg). Booster seats raise these children up so that the
safety belt will pass properly over the stronger parts of their
bodies and the safety belt can help protect them in a crash.
- Do not use the convertible locking retractor when using
the vehicle's safety belt to restrain a child on a booster
seat.
- Always position the shoulder portion of the safety belt
midway over the child's shoulder.
- Always make sure that the shoulder portion of the safety
belt never rests against or across the child's neck.
- Always make sure that the child can properly wear the
lap portion of the belt low across the thighs or pelvis and
never over the stomach or abdomen.
Safety first
Child Safety
Children up to about 40 lbs (18 kg) are best protected in child safety
seats designed for their age and weight. Experts say that the skel ­
etal structure, particularly the pelvis, of these children is not fully
developed, and they should not use the vehicle safety belts
=> page 165, fig. 120.
Children who weigh more than 40 lbs. (18 kg) may generally use the
available three point combination lap and shoulder belts when they
sit on an appropriate booster seat . Be sure the booster seat meets
all applicable safety standards.
Booster seats raise the seating position of the child and reposition
both the lap and shoulder parts of the safety belt so that they pass
across the child's body in the right places. The routing of the belt
over the child's body is very important for the child's protection.
This applies whenever a child uses the vehicle's safety belts, even
when the child is big enough to use them without a booster seat.
Children age 12 and under should
always ride in the rear seat .
Children should not ride in the front seat unless no other seating
position is available because crash statistics show that children are
better protected in the rear seat.
In a crash, airbags must inflate within a blink of an eye and with
considerable force . In order to do its job, the airbag needs room to
inflate so that it will be there to protect the occupant as the occu ­
pant moves forward into the airbag.
A vehicle occupant including a child who is out of position and too
close to the airbag gets in the way of an inflating airbag. When an
occupant is too close, he or she will be struck violently and will
receive serious or possibly even fatal injury.
In order for the airbag to offer protection, it is important that all
vehicle occupants, especially any children, who must be in the front
seat in exceptional circumstances, be properly restrained and as far
away from the airbag as possible. By keeping room between the
child's or other occupant's body and the front of the passenger
compartment, the airbag can inflate fully and completely and
provide supplemental protection in certain frontal crashes. _.,
Vehicle care I I irechnical data

___ C_h_ i_ ld _ S_ a_ f_ e_ t_y ____________________________________________ _
& WARNING (continued )
• An improperly worn safety belt will not provide the best protec­
tion in a crash and may cause serious personal injury . Always
m ake sure that children and other veh icle occupants properly
wear available restraint sy stem s. Carefully follow the instructions
provided by the manufacturers of child restraints . •
Installing a child safety seat
Securing a child safety seat using a safety
belt
S afety belts f or the rear sea ts an d the front pa ssenger can
b e l ocke d wit h th e co nv erti ble lockin g ret racto r to p rop­
erly secu re c hild safety sea ts.
The safe ty be lts eme rgency loc king re tr acto rs for th e rea r s eat s
saf ety belts an d for t he front pass enger's seat safety be lt have a
co nve rtible lock ing retracto r for c hild r estra int s. The sa fet y b elt
must be loc ked so t hat belt we bbing cannot u nre el. T he r etrac to r
can be activated to lock the safety be lt and prevent the safety be lt
w eb bing fr om l oos enin g up dur ing n ormal dr ivi ng . A ch ild safe ty
seat can only be properly instal led when the safety belt is locked so
th at the chi ld and chi ld sa fety seat will st ay in pla ce.
Al ways rem embe r: Even t hough you r vehic le is equ ipped with an
A dva nced Airb ag s ystem, a ll chil dre n, esp ecia lly th ose 12 yea rs and
youn ger, s hou ld always ri de in the back seat prop erly rest rained for
thei r age and size .
& WARNING
Improperly installed child safety seats increase the risk of serious
personal injury and death in a collision .
& WARNING (continued)
• Always make sure that the safety belt retractor is locked when
installing a child safety seat . An unlocked safety belt retractor
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
• If the backrest is not securely latched, the child and the child
restraint will be thrown forward together with the backrest and
will strike parts of the vehicle interior . The child can be seriously
injured or killed .
• Never install rear-facing child safety seats or infant carriers on
the front passenger seat . A child will be seriously injured and can
be killed when the passenger 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, door or roof .
• Always install rear -facing child safety seats or infant carriers on
the rear seat.
• Forward-facing child safety seats or infant carriers installed on
the front passenger's seat may interfere with the deployment 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 a vehicle is being used=> page
157 . Special precau ­
tions apply when installing a child safety seat on the front passenger seat=> page
137, "Child restraints on the front seat -
some important things to know" . ._

____________________________________________ __:C:::. h :....:..:..:. il.:::d ~S :::.:::a.:.:fe :::. t:.! y~ _ffllll
& 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
=> page 146, "Monitoring the
Advanced Airbag System".
• Take the child restraint off the front passenger seat and install
it properly at one of the rear seat positions if the PASSENGER AIR
BAG OFF light does not stay on whenever the ignition is switched
on .
• Improper installation of child restraints can reduce the ir effec­
tiveness or even prevent them from providing any protection .
• An improperly installed ch ild restraint can interfere with the
airbag as it deploys and seriously injure or even kill the child.
• Always carefully follow the manufacturer's instructions
provided with the child safety seat or carrier.
• Never place additional items on the seat that can increase the
total weight registered by the weight-sensing mat and can cause
injury in a crash .
& WARNING
Forward-facing child restraints:
• Always make sure the forward -facing seat has been designed
and certified by its manufacturer for use on a front seat with a
passenger front and side airbag .
• Never put the forward -facing child restraint up , against or very
near the instrument panel .
Controls and equip­ ment Safety first
Vehicle operation
& WARNING (continued )
• Always move the passenger seat into its rearmost position in
the seat's fore and aft adjustment range, as far away from the airbag as possible before installing the forward-facing child
restraint. The backrest must be adjusted to an upright position .
• Make sure that the PASSENGER AIR BAG OFF light comes on
and stays on all the time whenever the ignition is switched on.
& WARNING
Rearward -facing child restraints :
• 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 , door or roof .
• Always be especially careful if you must install a rearward
fac ing child safety seat on the front passenger seat in e xceptional
circumstances .
• A tight tether strap on a rearward-facing child restraint
attached to the front passenger seat can put too much pressure
on the weight-mat in the seat and register a heavier weight in the
Advanced Airbag System. The heavier weight registered can make
the system work as though an adult were on the seat and deploy
the Advanced Airbag when it must be suppressed causing serious or even fatal injury to the child .
• Make sure that the PASSENGER AIR BAG OFF light comes on
and stays on all the time whenever the ignition is sw itched on .
• If the PASSENGER AIR BAG OFF light does not come on and stay
on , immediately install the rear-fac ing child safety seat in a rear
seating position and have the airbag system inspected by your
Audi dealer. •
Vehicle care Do-it-yourself service Technical data

rest in the area that the guidance fixtures were installed. The uphol­
stery would also be permanently stretched around the guidance
fixtures. This applies especially to leather seats.
[ i J Tips
• Always remove the guidance fixtures when not in use .
• Please keep the guidance fixtures in a safe place with the vehicle
when not in use.•
Installing a child restraint using the lovver
anchorages of the LATCH system
Child safety seats equipped with the LATCH system can
quickly and easily be secured to the rear seats.
Safety first
Fig . 126 LATCH-type
seat with both rigid
latch bars extended
Child Safety
Fig. 127 Installation of
child safety seat with
rigid latches on bars
Whenever you install a child restraint always refer to the
child restraint manufacturer's instructions.
- Make sure the seat back of the rear seat bench is in the
upright position and securely latched in place.
- Install the guidance fixtures==>
page 173.
Insert the latches onto the lower anchorages==> fig. 127.
- Make sure you hear the child restraint click securely into
place. This indicates that the seat is securely mounted on
the anchors.
- Pull on the child restraint once you have mounted it to
make sure it is secure.
& WARNING
Improper use of the LATCH system can increase the risk of serious
personal injury and death in an accident.
• These anchors were developed solely for child safety seats
using the "LATCH" system.
• Never attach other child safety seats, belts or other objects to
these anchors.
• Always make sure that you hear a click when latching the seat
in place. If you do not hear a click the seat is not secure and could .,
Vehicle care I I irechnical data

___ C_h_ i_ ld _ S_ a_ f_ e_ t_y ____________________________________________ _
S ec uring th e child r estraint t eth er str ap to th e
teth er anchor
- Release or deploy the tether strap on the child restraint
according to the ch ild restraint manufacturer's usage
inst ruct io ns.
- Tilt the recess flap -detail view-=> fig. 129 up to expose
the anchor bracket.
- Slide the tether strap hook over the anchor b racket.
- Pull on the tether st rap hook so that the spring catch of
the hook engages.
- Tighte n the tether strap firmly following t he chi ld
restraint ma nufacturer's instr uctions.
Releasing the tether strap
- Loosen the tension following the child restraint manufac­
turer's instructions.
- Depress the spr ing catch on the hook a nd release it f rom
the tether anchor .
& WARNING
Always read and heed all W ARNINGS .
0 Note
If you leave the child restraint with the tether strap firm ly instal led
for severa l days, this could leave a mark on the upho lstery on the
seat cushion and backrest in the area where the tether strap was
installed . The upholstery would also be permanent ly stretched
around the tether strap . This applies especial ly to leather seats .•

___ ln_ t _e_ ll_,ig ..,_ e_ n_t _t_ e_ c_ h_ n_o _ l_o ..:-g"'-' y'- -------------------------------------------
Intelligent technology
Notice about data recorded by
vehicle control modules
Your vehicle is not equipped with an Event Data Recorder (EDR),
installed by some manufacturers for the express purpose of
capturing data for retrieval after an accident or crash event . EDR's
are sometimes called "crash recorders".
Some state laws restrict the retrieval or downloading of data stored
by EDR's that were installed in a vehicle for the express purpose of
retrieving data after an accident or crash event w ithout the owner's
consent.
Although your vehicle is not equipped with an EDR, it is equipped
with a number of electronic control modules for various vehicle systems such as, for example, engine function, emission control, as
well as for the airbags and safety belts.
These electronic control modules also record vehic le-related data
during norma l vehicle opera tion for diagnostic and repair purposes .
The recording capacity of the electronic control modules is limited
to data (no sound is recorded) and only a small amount of data is
actually 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 vehic le speed, direction,
braking as well as restraint system use and performance in the
even t of a crash or other condition . Stored data can only be read and
downloaded with special equipment.
Electronic Stabilization Program (ESP)
Genel'61
The Electronic Stability Program increases driving
sta bility.
Fig . 13 0 Cente r
cons ole with ESP
sw itch
With ESP, control over the veh icle is increased in situations when
the vehicle is close to the limits of grip, such as during acce leration
and in curves. ESP reduces the risk of skidding a nd improves vehicle
stability under all road conditions . It operates at all speeds .
The Anti-Lock Brake System (ABS), E lec tronic Differentia l Lock (EDS)
and Anti-Slip Regulation System (ASR) are integrated in the Elec­
tronic Stability Program .
H ow ESP work s
The ESP control unit processes the following data from high-sensi ­
tive sensors: the rotational speed of the vehicle about its vertica l
axis, fore -and -aft and lateral acceleration forces, brake pressure and
steering angle.
Using steering ang le and vehicle speed, the direction the driver
wishes to travel is determined and continuously compared with
actual vehicle behavior . If the two do not match, for example when

the vehicle begins to skid, ESP brakes the appropriate wheel auto­matical ly .
The vehicle is stabilized again by the forces acting on the wheel during braking. With an oversteering vehicle (tendency for the rear
end to skid out of the curve), the brake application is mainly at the
front wheel on the outside of the curve, with an understeering
vehicle (tendency to run wide in the curve) at the rear wheel on the
inside of the curve or additionally at the other wheels as needed .
This brake application is accompanied by noises.
ESP works in conjunction with ABS=:>
page 187. If there is ma lfunc­
tion in the ABS, ESP is also inoperative .
Activa ting
The ESP is automatica lly activated when the engine is started, and
it performs a self-test. As soon as the test is completed, the system
is in normal operating mode . With ASR deactivated, or with ESP/ASR
deactivated, pressing the button=>
page 182, fig. 130 returns the
system to normal operation.
D eac tiva ting
ESP should norma lly be activated at all times because this ensures
optimum vehicle stability . Only in certain exceptional cases it does
make sense to deactivate Anti -Slip Regulation (ASR) or the Elec ­
tronic Stability Program !ESP) by pressing the button =:>
page 182,
fig. 130. Both deactivation stages can only be activated from normal
mode.
Dea cti vat ing ASR
Tap the switch . Deactivation is indicated by slow flashing of the ESP
lamp in the instrument c luster. In certain situations (e.g. driving
with snow chains, in deep snow or on loose ground, or when rocking the car free), it may be necessary to deactivate ASR. Deacti ­
vation is effective only up to a speed of about 45 mph (70 km/h). At higher speeds, ASR is switched on again automatical ly in front ­
whee l drive vehicles, deactivation is possible only up to about 30
mph (50 km/h). With all -whee l drive vehicles, ASR is active above
Controls and equip­
ment Safety first Vehicle operation
In
te llig ent tec hn olo gy
about 45 mph (70 km/h) and deactivated automatical ly below this
speed.
D eac tiva tin g ES P/ASR
Press the button for more than 3 seconds . Deactivation is indicated
by the ESP lamp in the instrument c luster staying on permanently .
This deactivates the E lectronic Stabi lity Program (ESP) in addition to
ASR . No Electronic Stability System operation and no Anti-Slip
Regu lation is availab le across the entire speed range; ASR and ESP
are activated only when the brakes are used for the duration of the
braking action and remain active until a stab le vehicle condition has
been reached. There is no driving situation which requires ESP to be
deactivated, so this should only be done if the driver's skill and the
traff ic situation permit .
& WARNING
• The limi ts of ph ysics ca nnot be suspe nd ed by E SP. E ven in vehi ­
cles w ith ESP, you should always adapt your dr iving to road and
tr affi c co ndition s. Thi s is part icul ar ly tr ue on a s lippe ry and wet
road . Do not be te mpt ed b y th e incre as ed safet y prov ided t o ta ke
ri sks - dang er of an acc ide nt!
• Plea se not e that when ASR or ESP /ASR i s de activ ated , the drive
w heel s ca n spin on icy and slipper y ro ad s an d the vehi cle can
break away - da nger of skiddin g!
Ii ] Tip s
In the event of a defect in the rear spoiler system or in Audi
magnetic ride, it can happen that ASR and ASR/ESP cannot be deac ­
tivated, or they are activated automatica lly in the deactivated
state. •
Vehicle care Do-it-yourself service Technical data

___ ln_ t _e_ ll-'"ig ...,_ e_ n_t _t_ e_ c_ h _ n_o _ l_o _,.g= y,_ __________________________________________ _
Electronic differential lock (EOL)
The electronic differential lock monitors the rotational
speed of the drive wheels.
General notes
The electronic differential lock (EDU helps the car to start moving,
accelerate and climb a gradient on surfaces providing poor or
almost no grip. Without EDL, this would be difficult, if not impos ­
sible.
How the system works
Th e EDL operates automatically. It monitors the rotational speed of
the drive wheels on an axle with the help of the ABS sensors
=> page 187. If a noticeable difference in rotational speed between
the drive wheels on one axle is detected (e.g. on slippery ground on
one side), the spinning wheel is braked, thereby transferring power
to the other drive wheel or wheels (all-wheel drivel. This is done up
to a speed of about 60 mph (100 km/hl. Noises from the brake
system signal that wheel spin is being controlled.
Driving off
When driving off, always be sure to keep road conditions in mind as
you accelerate . If one drive wheel spins because it is on a surface
with less grip, gradually increase the pressure on the accelerator
pedal until the car starts to move. The wheel less able to transfer
power spins.
Overheating of brakes
To prevent the disc brake of the braked wheel from overheating if
subjected to excessive loads, the EDL cuts out temporarily . The
vehicle remains operational and behaves in the same way as a
vehicle without EDL.
As soon as the brake has cooled down, EDL switches on again auto­
matically.
& WARNING
• When accelerating on slippery surfaces, such as on ice or snow,
always be careful when depressing the accelerator pedal. Even
with the EDL working, the drive wheels can spin and reduce your ability to control your car. -Risk of crash!
• The increased safety afforded by EDL does not mean that you
can take safety risks. Always adapt your driving style to the road
conditions and traffic situation.
[ i] Tips
If a fault occurs in the ABS, the EDL is also not functioning . This is
indicated by the ABS warning light=> page 20. •
Anti-Slip Regulation System (ASR)
The Anti-Slip Regulation System prevents the driven
wheels from spinning when the car is accelerating.
General notes
The Anti-Slip Regulation System (ASR) is integrated in the electronic
stabilization program (ESP). When the vehicle starts up and acceler ­
ates , the wheels are prevented from spinning by adjusting the
engine power to match the amount of grip available from the road
surface .
How the system works
ASR performs automatically, i.e. without the driver's intervention .
With the aid of the ABS sensors => page
187, ASR monitors the
speed of the driven wheels. If the wheels start to spin, the engine
torque is reduced automatically until the tires find enough grip to
lock onto the road surface . The system is active across the entire
speed range.
The ASR works in conjunction with the ABS. If a malfunction should
occur in the ABS, the ASR will also be out of action .
~

Activating
The ESP is automatically activated when the engine is started and it
performs a self-test. You can activate a deactivated ASR if required
by pressing the=>
page 182, fig. 130 button. When it is activated,
the message
ESP/ASR on appears briefly in the display. Vehicles
with front -wheel drive a deactivated ASR automatically re -activates
itself at a speed of 40 mph (70 km/h).
Deactivating
You can deactivate the ASR if required by pressing the button (for
less than 3 seconds)=>
page 182, fig. 130. With the ASR deactivated,
the ESP check light comes on, see=>
page 17. The message ASR off
appears in the display as well. On vehicles with front -wheel drive:
deactivation is possible only up to 30 mph (50 km/h) for safety
reasons. Vehicles with all -wheel drive : the ASR can be deactivated
at any speed.
The ASR should normally be activated all the time. Only in certain exceptional situations when some slip is desirable does it make
sense to deactivate the ASR. Examples:
• when driving with tire chains
• when driving in deep snow or on loose ground and
• when rocking the vehicle loose after it has become stuck.
When the abnormal situation is over, you should activate the ASR
again.
& WARNING
The increased safety afforded by ASR does not mean that you can
take safety risks. Always adapt your driving style to the road
conditions and traffic situation.
[ i J Tips
To ensure that the ASR works properly, all four wheels must be fitted
with identical tires. Any differences in rolling radius of the tires can
Intelligent technology
cause the system to reduce engine power when this is not desired.
See also ::::>
page 246, "New tires and replacing tires and wheels".
Rear spoiler
The rear spoiler improves vehicle handling and enhances
driver control.
Fig. 131 Switch for
rear spoiler
The rear spoiler deploys and retracts. Spoiler operation can be set
for automatic or manual operation .
Automatic mode (normal operation)
• Automatic deployment : At a speed of about 75 mph (120 km/h),
the rear spoiler deploys automatically.
• Automatic retraction: When speed drops below about 50 mph
(80 km/h), the rear spoiler retracts automatically.
Manual mode
• Manual deployment: Tapping briefly on the switch ::::> fig. 131
deploys the rear spoiler .
• Manual retraction: At speeds up to about 10 mph (20 km/h),
retract the rear spoiler by pressing and holding the switch
::::> fig. 131. At speeds between 10 mph (20 km/h) and 75 mph (120
km/h), retract the rear spoiler by tapping on the switch=> fig. 131 .
Vehicle care I I irechnical data

-Intelligent t echnology
-- -""'------------ ....::....:...:~---------------------------
After 15 cycles (deploy and retract) , manual operation is suspended
f o r up t o 2.5 minutes . Above 75 mph (120 km/h), operation swi tches
to automatic mode .
& WARNING
Driving at higher speeds witho ut the re ar spoiler deployed can
impair handling characteri stics, making the vehicle harder to
c ontrol.
• Always make sure that the spoiler i s deployed when driving at
speeds over 85 mph (140 k m/h). If the rear spoiler warning /ind i­
c ator light in the in strument clu ster come s on , the rear spoiler
may not have deployed .
• Never drive at speed s higher than 85 mph (140 km /h ) if the
spoiler is not deployed . Have the spoiler inspe cted as soon as
po ssible by an authorized Audi dealer or qualified workshop.
• Always obey speed limits and other traff ic law s.
& WARNING
Improper operation of the rear spoiler can cause crushing injuries.
• Always make su re that nobody , especially children , is in the
way when the rear spoiler is deployed or retracted.
0 Note
Never push the vehicle or a pply force to the rear spoi ler -it cou ld be
damaged .
[ i ] Tips
Clean the spoi ler compartment every 2 to 3 months . The spoiler
compa rtment must always be free of ice, snow, leaves or other
debris .•
Braking
General "nformation
W hat aff ects braking effi cie ncy?
Operating condition s and driving habits
The brakes on today's automob iles a re sti ll sub ject to wea r,
depending large ly o n operati ng co nditions and driving habits~& .
On vehicles that are either driv en mostly in stop -and -go city traffic
or are driven hard, the brake pads shou ld be c hecked by you r au tho ­
ri ze d Audi dea ler mor e often than sp ecified in the
Warranty & Main ­
tenance booklet.
Fai lure to have your brake pads inspected can
resu lt in reduced brake performance.
On s teep sl opes, you should use the braking effec t of the engine .
T his way, you prevent unnecessary wear on the brake sys tem . If you
must use your brakes, do not hold the brakes down continuous ly.
P ump t he b rakes a t interva ls.
Moi sture or road salt
Under certa in conditions, for example , when driving through water
or
ve ry heavy rai n, o r even afte r washing you r ve hicle, the brak ing
e ff ect can be reduced due to moisture (or in freezing cond it io ns ice)
on the brake pads . A few cautious brake applications should dry off
the brake pads or remove any ice coat ings.
T he effectiveness of the brakes can be reduced when the vehic le is
driven on a sa lt-c o ve re d r oad and the brake s are not used . Likew ise,
you clean off accumulated sa lt coat ing from brake discs and pads
wit h a few cau tious applica tions of t he brake ~& .
Corrosion
There may be a tendency for d irt to buil d up o n the b rake pads a nd
corrosion to form on the discs if the car is not driven regular ly or
only for sho rt trips wi th lit t le use of the brakes. ._