heating AUDI TT COUPE 2009 Owners Manual

Warm and cold
Climate controls
Controls
The air conditioning automatically maintains the selected
temperature in the vehicleinterior throughout each
se ason.
F ig. 76 C limate contro ls
We recommend the following setting:
- Rotate the knob~ fig. 76@ to the right to switch on the
ai r conditioning.
- Set the temperature to 72 °F (22 °C).
- Press the !AUTO
j ~ fig. 76 button.
Con tro ls and eq uip­
ment
W arm and cold
Using the previously recommended setting is the quickest way to
achieve a comfortable climate in the vehicle. This setting should
therefore only be changed when personal comfort levels or certa in
circumstances require it.
The climate controls are a combination of automatic heating and
ventilation systems and a cooling system which dehumidifies and cools the air inside the vehic le .
The climate controls automatically maintain a temperature once it has been set. The temperature of the air from the vents, fan speed
(air volume) and air dist ribu tion are a lso automatically adjus ted . The
system also takes into account strong sunshine so that manual
adjus tment is not necessary. So in almost all cases,
a ut omatic mode
offers the best conditions for the comfort of the occupants at all
times of the year~
page 88.
Ple ase not e:
In cooling mode, relative humidity in the interior is reduced. This
prevents the windows from fogging up .
When relative humidity and temperatures outside are high,
conden ­
s ate
can drip from the air conditioning evaporator and form a pool
of water under the vehicle . This is normal and not an indication of a
leak!
When outside temperatures are low, the fan does no t switch to a
higher speed until the coolant has reached an adequate tempera­
ture, with the exception of t he defrost setting .
When accelerating at wide-open throttle, the air conditioning compressor is temporarily switched off to maintain fu ll engine
power.
In order to ensure engine cooling under extreme engine loads, the
compressor is switched off if coolant temperatures climb too high ...
Vehicle care I I irechnical data

Warm and cold
Functions are set by turning the rotary knob or switched on and off
b y tap ping the buttons . The LED in the bu ttons illuminates when the
function is active .
Button(sl
Rotary knob G)
Rotary knob 0@
Rotary knob©
I- .;+ I
Pollutant filter Meaning
Temperature selection
Switch air conditioning
on/off Fan
Air distribution
Rear window de fogger
Heated seat* driver/pas­
senger side
Recirculation
-Switch on coo ling sys -
tem Page
=> page 86
=> page 87
=> page 87
=> page 88
=> page 89
=> page 90
=> page 88
=> page89
The pollutant filter (particle filter) ensures that contaminants in the
outside air (such as dus t or p ollen) are greatly reduced or stopped.
The air is also filtered in recirculation mode.
T he pollutan t fil te r element must be changed accord ing to the inter ­
vals specified in the maintenance schedule so that the air condi­
tioning system's performance is not adversely affected.
If the filter's effectiveness is weakened by driv ing t he vehic le in
areas with heavi ly polluted outside air, the filter element should also
be changed in between the listed services .
& WARNING
For safety re ason s, it is impo rtant that all window s are free of i ce ,
snow, and condensat ion . Onl y then is good visibility ensured .
Plea se familiari ze your self with the correct operation of the air
conditioning and how to dehumidify /defrost the windows .
0 Note
• If you suspect that the climate controls have been damaged,
switch the system off to avoid damag ing it, and have it inspected by
an author ized Audi dealer.
• Audi climate control system repairs require special expertise and
t he proper tools. You shou ld contact an authorized Audi dealer in
the event o f malfunctions.
[ i ] Tips
• To avo id adverse ly affecting heating and cooling performance
and to prevent condensation on the windows, the air intake in front
of the windsh ield must be free of ice, snow, and leaves.
• The air coming from the vents and circulating through the entire
inter ior is extracted through the outlet slots in the side panels in the
luggage compartment. Make sure that the outlet slots are not
covered by clo th ing, etc.
• Climate control works most effectively if the windows are closed .
H owever, if the interior of a parked vehicle is extremely hot from the
sun's rays, briefly opening the windows can speed up the cooling
process. •
Setting temperature
Tur n th e rota ry kno b G) ~ page 85, fig. 7 6 to t he des ired
t e mperature sett ing .
~

& WARNING
You shou ld not u se t he re circ ulati on mod e for an exte nd ed p eriod
si nce no fre sh air i s drawn in , and with the air conditioning
sw itc hed off the windows ca n fog up -thi s inc re a ses the r isk of an
acc ident !•
A/C operation [A C)
Switching on A /C
- Press the (AC) button~ page 85, fig. 76 .
Switching A /C off
- Press the (AC) button again.
T he cooling system is switched on during A/C operation -the
heating and ventilation system is controlled auto matica lly.
[ i J Tips
I f the LED in the switch stays on after A/C operation has been
switched off( = switching the A/C off), there is a fau lt in an air condi­
tioning component. P lease consult an authorized Audi dealer when
there is an operat ing prob lem. •
Using the climate controls economically
E conomical use of the climate c ontrols helps to save fuel.
When climate control is working in cooling mode, engine
performance is reduced and fuel consumption is affected.
To keep the t ime the air cond itioning is on as s hort as
poss ible, you s hould do the following:
Controls and equip ­
ment
W arm and cold
- If you would like to save fuel, swit ch the air conditioning
off .
- If you open the windows while driving, switch the air
conditioning off .
- If the veh icle is extremely hot due to the heat of the sun,
briefly open doors and windows.
'£> For th e sake of th e environm ent
When you save fuel, you reduce emissions from the vehicle. •
Rear window defogger [ffiJ
The rear window defogger clears the rear window of
condensati on.
- Press the QuJ bu tton~ page 85, fig. 76 to turn the rear
window defogger on and off.
The rear window defogger works on ly when the engine is running.
The indicator light in the button illuminates when the rear window defogger is turned on.
The rear window defogger is switched off automatica lly after 10 to
20 minutes, depending on the outside temperature .
At very low outside temperatures, the rear window defogger can be switched on continuously by pushing the
Qiil button for more than 2
seconds. This remains stored until the ignition is switched off. A
rear window defogger that was switched on also remains stored for
15 minutes after the ignition is switched off.
If the engine is restarted within these 15 minutes, the rear window
defogger is activated for 10 to 20 minutes, depending on outside
temperature . With a vehicle that is parked for a short time, the rear
window defogger does not need to be manually activated again. .,,_
I • •

Warm and cold
A s soon as the rear window is clear , you should switch the rea r
window defogger of f. Th e reduced power consumption has a bene ­
fic ia l effect on fue l consumption .•
A pplies to veh icles: w it h heated s eat s
---Heated seats (-J +]
The seat cushion and the seat back of the front seats can
be heated electrically.
- Press the heated seats button [ -,;J +) ~ page 85, fig. 76 to
set the level of heat ing desired .
The range of controls goes from 1 to 3 . The heat sett ing selected is
shown by LEDs abov e th e button.
0 Note
To avoid damage to the heating elements in the seats, do not kneel
on the seats or place heavy loads on a small area of the seat. •

___ 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 .
~

New brake pads
Remember that new brake pads do not have a full braking
effec t during the first 250 miles (400 kilometres) after they
are installed.
New brake pads have to be "burnished in" before they have optima l
grab=> &.
During the break -in period, you should avoid putting severe loads
on the brakes. Severe loads include, for example, sudden hard
braking, in particular at very high speeds or, for example, on moun ­
tain passes.
& WARNING
U ntil the y develop the m axim um "b ite " fo r be st stoppi ng p owe r,
th e s urfaces on new br ake p ads re quir e some " brea king -in " during
th e ini tia l 100 to 150 miles 1 150 to 200 k ilom etres) of nor ma l c ity
driving . You can comp ensa te fo r thi s by press ing the brak e ped al
more fi rml y. T his appl ie s w henev e r ne w pad s a re in sta lled . •
Catalytic converter
It is very important that your emission control system
(catalytic converter) is fu nctioning properly to ensure that
y o ur vehicle is running in an environmentally s ound
manner.
- Always use lead-free gasoline~ page 211, "Fuel supply".
- Never run the tank down a ll the way to empty.
- Never put too much motor o il in your engine~
page 222,
"Adding engine oi l 'l=:;r\11
•
- Neve r try to push -or tow -s tart your ve hicle.
Controls and equip­
ment Safety first Vehicle operation
Dri
ving and environm ent
The catalytic converter is an efficient "clean-up" device built into the
exhaust system of the vehicle . The cataly tic converter burns many
of the pollutants in the exhaust gas before they are re leased into the
atmosphere.
The exclusive use of un leaded fuel is critica lly important for the l ife
of the catalytic converter and proper functioning of the engine.
& WARNING
• Do not park or oper ate th e ve hi cle in are a s whe re the hot
exha ust sys te m may c ome in conta ct wi th dr y grass, bru sh , fu el
s pill or other mat eri al which can cau se a fi re.
• Do not app ly a dditi onal u nder co at ing or ru stpr oofing on or
near the exhau st m anifold , exh au st pipe s, cata ly tic convert er or
he at shi elds. During dri ving, the s ubstance use d f or und ercoa ting
c ould ov erheat an d ca u se a fire.
0 Note
• Be aware that just one tank fi lling with
le ad ed fuel wi ll a lready
seriously degrade the performance of the catalytic converter.
• Do not exceed the correct engine oil level =>
page 222.
• Do not drive until the fuel tank becomes completely empty. The
engine could misfire . Unburned fuel could a lso get into the exhaust
system and this could cause the catalytic converter to overheat .
• Do not turn off the igni tion wh ile the vehicle is moving.
• Do not continue to operate your vehicle under these conditions,
as otherwise fue l can reach the cata lytic converter. This could resu lt
in overheating of the converter, requiring its replacement .
• To assure efficient operation of the Emiss ion Control System:
- Have your vehicle maintained properly and in accordance with
the service recommendations in your Warranty
& Maintenance
booklet.
Vehicle care Do-it-yourself service Technical data

one half. Never drive faster than the posted speed limit and weather
conditi ons permit. •
Reducing unnecessary Idling
Even when your car is just idling it burns up fuel.
- Shut the eng ine off when you are not driving the vehicle .
- Do not warm up the vehicle by letting the eng ine run at
idle.
I t makes sense to shut off the engine in traffic jams, when waiting
for trains to pass at railroad crossings, or at traffic lights that have long waits on red. Turning the engine off for just 30 -40 seconds
saves more fue l than is burned s tarting the engine again .
It takes a long time for the engine to warm up fully when it is
running at idle . However, wear and noxious emissions a re especial ly
high when the engine is warming up . So you should drive away as
soon as you start the engine and avoid running at high RPMs whi le
the engine is stil l warming up .
0 Note
Do not leave engine idling unattended after starting . If warning
lights should come on to indicate improper operation, they would
go unheeded. Extended idl ing also produces heat, wh ich cou ld
result in overheating or other damage to the vehicle or other
property .•
Regular maintenance
A badly tuned en gine unnecessarily wastes a lot of fuel.
- Have your v ehicl e serv ice d at reg ular intervals.
Controls and equip­
ment Safety first Vehicle operation
Dri
ving and environm ent
By having your vehicle regularly serviced by an Audi dea ler helps to
ensure that i t runs properly and economically . The conditio n of your
vehic le not only affects its safety and abi lity to hold its va lue, it also
affects
fuel consumption .
Check your oil each time you fill your tank.
The amount of oil used is related to engine load and speed .
I t is normal for the oi l consumption of a new eng ine to reach its
lowest va lue after a certain mi leage has been driven.
You must drive your vehicle about 3,000 miles (5,000 kilometres) be fore you can proper ly assess o il consumpt ion.
This also applies to fuel consumption and engine output .
0 Note
• Have your vehicle maintained properly and in accordance with
t he service recommendations in you r Warranty
& Maintenance
booklet. Lack of proper ma intenance as well as improper use of the
vehicle wi ll impair the function of the emission control system and
cou ld lead to da mage.
• Do not alter or remove any component of the Emission Contro l
System unless approved by the manufacturer .
• Do no t al te r or remove any device, such as heat shields,
switches, ignition wires, valves, which are designed to protect your
veh ic le' s Emission Contr ol System and o ther i mportant vehicle
components. •
Fewer short trips
Fu el con su mp tion wi ll alwa ys be rel atively high on shor t
tri ps.
- Try to avo id driving short dista nce s wi th a cold engine.
Vehicle care Do-it-yourself service Technical data

_______________________________________________ C_l_e _a_ n_ in _____ g ___ a_n_ d ___ p_r _o _t_ e_ c_ t _i _o _ n __ lfll
•
0 Note
• Never use chemical solvents (e.g. lighter fluid, turpentine),
waxes, shoe polish or similar products on Alcantara® surfaces.
• To avoid damage, have stubborn stains removed by a commer­
cial cleaning specialist.
• Do not use brushes, stiff sponges or similarly abrasive cleaning
aids. •
Safety belts
Only well-maintained safety belts work reliably when
needed.
Heavily soiled safety belts may not retract properly.
- Keep belts clean.
-For cleaning, use a mild soap and water solution. Let
belts dry thoroughly and away from direct sunlight.
- Do not allow inertia reel safety belts to retract before
they are completely dry.
- Check the condition of your safety belts
regularly.
& WARNING
Damaged safety belts can break in a crash .
• Anything that might damage your safety belts could mean that
you and your passengers would not be adequately protected in an
accident.
• Safety belt performance depends on correct installation. Never
remove belts from the vehicle to clean them .
• Do not use chemical cleaning agents, bleach or dyes. They have
corrosive properties which weaken the webbing.
& WARNING (continued)
• When cleaning your safety belts, inspect them for damage. If
you discover damage, see your Audi dealer .
• Always read and heed all WARNINGS and the information
~ page 198. a
Engine compartment
Be especially careful when cleaning the engine compart­
ment.
Always switch off the ignition before cleaning the engine ~ &­
Plenum panel
Remove leaves from the plenum panel in front of the windshield
under the engine hood. This prevents the water drain holes from
becoming blocked, and it prevents debris from entering the vehicle
interior through the heating and ventilation ducts.
Corrosion protection
The engine compartment and transmission have been corrosion­ protected at the factory.
Good anti-corrosion treatment is very important, particularly in the
winter. If the vehicle is frequently driven on salt treated roads, the
entire engine compartment and plenum panel should be thor ­
oughly cleaned at the end of winter and retreated to prevent salt
damage. At the same time, the underside of the vehicle should be
washed as well.
I f the engine compartment is cleaned at any time with grease
removing solutions
21 , or if you have the engine washed, the anti­
corrosion treatment is almost always removed as well. It is therefore
essential to have a long-lasting corrosion protection reapplied to all
~
21 Use only the correct cleaning solutions. Never use gasoline or diesel fuel.
Vehicle care I t •

-~_C_ h_e _c _ k_ i_n ...:::g::;...._ a_n_ d_ f_ i_ll _in -'g:::;.._ ___________________________________________ _
& WARN ING (c o ntinued )
• Continuou s contact with used en gine oil i s harmful to your
sk in. Alway s prote ct your skin b y wa shi ng oil off thoroughly with
soap and water .
0 Note
Never mix oil additives with your engine oil. These additives can
damage your engine and adversely affect you r Audi Limited New
Vehicle Warranty.
<£> For the sake of the environment
• Before changing your oil, first make sure you know where you
can proper ly dispose of t he used oil.
• Always dispose of used engine oil properly . Do not dump it on
garden soil, wooded areas, into open strea ms or down sewage
drains .
• Recycle used eng ine oi l by taking it to a used eng ine oi l collec ­
tion facility in your area, or contact a service station. •
Engine cooling system
Coolant
The e ngine coolant perfor ms tw o functions: i t kee ps the
en gine from overheatin g and i t pro tects the engi ne from
freezing in the winter.
The cooling system is sea led and general ly requires litt le attention.
The coo ling sys tem has been f illed at the factory with a permanen t
coo lant which does not need to be changed. The coolant consists of
a mixture of water and the ma nufacturer 's glyc ol- basedco olan t
additive
G12++ antifreeze w ith anti corrosion additives (50% for USA models; 60% for Canadian mode
ls) . T his mixture both assures the
n ecessary fros t pr otection a nd protects metal co mpo nents in the
engine's cooling system from corrosion and scaling. It also raises
t he boil ing point of the coolant .
Do not reduce the concentration of the coo lant in the su mmer by
adding plain water.
The proportion of coolant additive mu st be at
lea st 50 % but not more than 60 %
to maintai n antifreeze pro tection
and cooling efficiency. If the coolant frost protection is too low, the
coo la nt co uld free ze and damage the vehic le heating and engine
coo ling system .
For year-round driving, antifree ze is added at the factory for temper­
atures down to:
• - 31 °F ( -35 °C) USA
• -40 °F ( -40 °C) Canada.
You can mix the
G 12+ + coolant additive with other additives (G12+
or G12). Always check w ith your authorized Audi dealer.
& WARNING
Before you check anything in the engine compartment, alway s
read and heed all WARNINGS
~ & in "Working in the engine
compartment " on
page 217.
0 Note
• Before winter sets in, have the coolant checked to see if the
coo lant additive in your vehicle is suff icient to meet the c limate
co nd itions . This is e special ly impor tant i f you live in a region where
the winter is extremely cold. If necessary, increase the proportion of coo lant additive t o 60%.
• When adding coolant additive to your cooling system,
r emem ber:
- We recommend using on ly coolant additive
G 12+ + (check the
l abel) for your veh ic le . Th is coolant additive is available at autho -
rized Audi dealers. Other types of antifreeze can significantly ._

Checking and filling -
---------------------=----"=---------
reduce corrosion protection. The resu lting corrosion can cause a
loss of coolant and serious engine damage.
• Do not add any type of radiator leak sealant to your vehicle's
engine coolant. Adding radiator repair fluid may adverse ly affect the
function and performance of your cooling system and cou ld result
in damage not covered by your New Vehicle Limited Warranty. •
Checking the engine coolant level
The engine coolant level can be checked with a quick
gla nce .
Fig . 142 Engine
co mp artm ent : coo lan t
e xpa nsion t ank
Before you check anything in the engine compartment,
always read and heed all WARNINGS=> & in "Working in
the engine compa rtment" on
page 217.
- Switch the ignition of f.
- Read the coo lant l eve l at the coo lant exp ansio n tank
==> fig. 142. With a col d e ngine, it must b e above the
"min" mar k. Wit h a hot engine, it can be a little above t he
indicated range.
The location of the coolant expansion tank can be seen in the
engine compartment i llustration. To obtain an accurate reading, the engine must be switched off.
The expansion tank in your vehic
le is equipped with an e lectric
coolant level sensor.
When the coolant leve l is too low, the warning light in the Auto ­
Check System =>
page 34 will blink un til you add coolant and the
level has been restored to normal. Even though there is an e lectric
coo la n t level sensor, we still recommend you check the coolant level
from time to time .
Coolant loss
Coolant loss may indicate a leak in the cooling system . In the event
of coo lant loss, the co oling sys tem shou ld be i nspected immedi­
ate ly by your authorized Audi dealer . It is not enough merely to add
coo lant .
In a
sealed system , losses can occur only if the boiling point of the
coolant is exceeded as a result of overheating .
0 Note
Do not add any type of radiator leak sea lant to your vehicle's engine
coolant. Adding rad iator repair fluid may adversely affect the func ­
tion and performance of your coo ling system and could resu lt in
damage not covered by your New Vehic le Limited Warra nty. •
Adding coo lant
Be very careful when adding engine coolant.
Before you check anything in the engine compartment,
always read and heed all WARNINGS==> & in "Working in
the engine compartment" on
page 217 .
-Turn off the engin e.
- Let the engine cool down.
Vehic le care I I irechnical data