2008 AUDI TT ROADSTER brake

_L_T~ir ~e :..:s~ a~n~ d~ w~ h ~e~e~ l~ s '.,_ ______________________________________________ _
Wheel bolts
W heel b olts mus t al wa ys be tigh te n ed to t he cor rect
to rqu e.
The design of wheel bolts is matched to the factory instal led rims . If
d ifferen t rims are fitted, the co rrect w heel bo lts wit h th e rig ht length
and correctly shaped bolt heads m ust be used. This ensures that
w hee ls are fitt ed s ecure ly a nd th at t he brake sys te m funct ions
correctly .
I n certain circums tances, yo u may no t use w heel b olts fr om a
differ ent vehicle -even if it is the same model::::;,
page 296.
&_ WARNING
Improperly tightened or maintained wheel bolts can become loose
causing loss of control , a collision and serious personal injury.
• Always keep the wheel bolts and the threads in the wheel hubs
clean so the wheel bolts can turn easily and be properly tightened.
• Never grease or oil the wheel bolts and the threads in the wheel
hubs. They can become loose while driving if greased or oiled,
even if tightened to the specified torque .
• Only use wheel bolts that belong to the rim being installed.
• Never use different wheels bolts on your vehicle.
• Always maintain the correct tightening torque for the wheel
bolts to reduce the risk of a wheel loss. If the tightening torque of
the wheel bolts is too low , they can loosen and come out when the
vehicle is moving . If the tightening torque is too high, the wheel
bolts and th reads can be damaged and the wheel can become
loose .
0 Note
The specified torque for the wheel bolts is 90 ft lb (120 Nm) with a
t ole ranc e of ± 7,4 ft lb(± 1 0 Nm). To rque whee l bolts diag onally.
After changing a wheel, the torque must be checked as soon as possible with a to
rque wrench -preferab ly by an authorized Audi
dea ler o r qu alif ied wo rksh op.•
Low aspect ratio tires
Yo ur Audi is fac tory-equip ped wi th l ow asp ect rati o tires. Th ese tires
have been thorough ly tested and been selected specifically for your
mod el for thei r su per b p erfo rma nce, road feel an d handl in g u nder
a variety of driving conditions . Ask your author ized Aud i dea ler for
mo re deta ils.
T he low aspec t ra tio o f th ese t ires is ind icate d by a numera l o f 55 or
less in the t ire's size designation. The numera l represents the ratio
of the ti re's s idewa ll height in re la ti on to its tread w idth e xpress ed
in percentage. Conventiona l tires have a height/width ratio of 60 or
mo re .
The performan ce of low -aspect -ratio t ires is part icularly sensitive to
improper inflation pressure . It is therefore important that low
aspect ratio tires are inflated to the specified pressure and that the
inflation pressure is regularly checked and maintained. Tire pres­
sures should be checked at least once a month and alway s before a
long trip::::;,
page 244, "Checking tire p ressure".
What you can do to a void tire and rim damage
L ow a spect ratio tires can be damaged more easi ly by impact with
potho les, curbs, gull ies or ridges on the road, particularly if the t ire
is underinflated.
In orde r to minimi ze the occurrence o f im pact da mage to th e tire s
of your vehicle, we recommend that you observe the fo llowing
p reca utions:
• Always ma intain reco mm ende d inflat io n pressu res . C heck your
tire p ressure every 2, 000 miles (3 ,000 km) and add ai r if neces sary .
• D rive car eful ly on roads with potholes, deep gullies or ridges.
Th e impact from d riving th ro ugh o r ove r such o bstac les can
dama ge you r tires . Impact w ith a curb may also cause da mage to
your tires . .,_

________________________________________________ T_ i _r_e _s_ a_n_ d_ w_ h_ e_e _ l_s __ !II
•
• After any impact, immediately inspect your tires or have them
inspected by the nearest authorized Audi dealer. Replace a
damaged tire as soon as possible .
• Inspect your tires every 2,000 miles (3,000 km) for damage and
wear . Damage is not always easy to see. Damage can lead to loss of
air and underinflation, which could eventua lly cause tire fai lure . If
you believe that a tire may have been damaged, replace the tire as
soon as possible .
• These tires may wear more quickly than others.
• Please a lso remember that, whi le these tires deliver responsive
handling, they may ride less comfortably and make more noise than
other choices.
R edu ced p erform an ce in w in te r/ c o ld sea son
co nditi ons
All tires are designed for certain purposes. The low aspect ratio,
ultra high performance tires originally installed on your vehicle are
intended for maximum dry and wet road performance and hand ling.
They are not suitable for cold, snowy or icy weather conditions . If
you drive under those circumstances, you should equip your vehicle
with al l- season or winter tires, which offer better traction under
those conditions . We suggest you use the recommended snow or
a ll- season tires specified for your vehicle, or their equivalent .
Refer to=>
page 254 for more detai led in formation regarding winter
tires. •
Run-flat tires
Applies to vehi cles : w ith R un-f lat tires
Introduction
Run-flat tires help keep you moving if a tire goes flat.
Reinforced s idewalls give the ti res run -flat capability if tire pressure
is lost . We recommend that run-flat tires only be mounted on vehicles that
we
re origina lly equipped with these special tires at the fac tory and
have a Tire Pressure Monitoring System .
Run-flat t ires can be ident ified by the letter s "RSC" on the tire side ­
wall.
If you do change the tires on your vehic le from normal to run -flat
tires, you must buy the special rims required for run-flat tires, and
the Tire Pressure Monitoring System must be reprogrammed by an
authorized Audi dea ler or other qualified workshop.
Wh at do run-fl at tir es do?
These special t ires have run-flat capabi lities that he lp keep you
moving if a tire loses pressure and goes flat. Under favorable condi ­
t ions tires can be driven
at least 30 miles (50 km ), but you must not
drive
f as ter t han 50 mph (80 km/h i=> page 258 , "Driving with run ­
flat t ires".
The Tire Pressure Moni toring System constantly checks the air pres­
sure in the tires. If the run -flat system is active (shown in the center
display), you must inspect the affected tire or tires and then decide
whether to continue driving . Be sure to follow these tips
=>
page 258, "Driving with run-flat tires" .
When it is not po ssibl e to continue driving , even with
run -fl at tire s?
• If the Electronic Stabilization Program (ES P) is not working or
keeps coming on.
• If the Tire Pressure Monitoring System does not work.
• If the tire has been severely damaged, in a crash , for example .
The tread can separate from a damaged tire as the wheel turns, and
hit parts of the vehicle , such as the fue l tank filler neck, fuel lines or
brake lines.
• Do not continue driving if severe vibration occurs or if the tire
starts to smoke because the tire is running hot.
• Do not continue driving if damage to the tire, such as cracks in
the s idewall, appears .
~
Vehicle care I t •

1111...__W_ h_ a _ t_d_ o_ l _d _o_ n_ o_ vv_ ? ______________________________________________ _
& WARNING (continued)
-if you have been driving with very low tire pressures or tires
with no air
• Seek professional assistance if it is not possible to repair the
tire with the tire sealant.
& WARNING
The tire sealant must not come into contact with skin, eyes or
clothing.
• If you get any tire sealant
in your eyes or come into contact
with it, rinse the affected area thoroughly with clean water. Find a physician immediately!
• Change any clothing contaminated with tire sealant immedi ­
ately.
• Do not inhale the vapor!
• If you have swallowed tire sealant, rinse your mouth thor­
oughly right away and drink plenty of water .
- Do not induce vomiting! Find a physician immediately!
• If you have allergic reactions, find a physician immediately .
• Keep the tire sealant away from children .
0 Note
Do not use commercially available tire sealants. The electrical
components of the tire pressure monitoring system will no longer
work properly.
'i> For the sake of the environment
Used sealant bottles can be dropped off at a recycling facility.
[ i] Tips
• If sealant has run out, allow it to dry. Then you can peel it off.
• Have the tire sealant replaced every 4 years at a dealership. •
Applies to vehic les: with T ire Mob ility System
Preliminary steps
Some preliminary steps are necessary for tire repair .
Fig. 168 Tire Mobility
System under luggage
compartment floor
- If you have a flat tire, park the vehicle as far as possible
from moving traffic.
- Apply the
parking brake firmly.
- On vehicles with manual transmission, engage
1st gear,
or move the selector lever to the P position on vehicles
w ith automatic transmission.
- Check whether a repair using the Tire Mobility System is
possible~
page 263, "General and safety pointers".
Have all passengers
leave the vehicle and stay away from
the danger zone~&.
- Take the
sealant bottle and the electric air pump from the
luggage compartment under the floor ~ fig. 168. .,_

Fuses and bulbs -
----------------
Equipment No. Equipment
Amps
Engine relay, fuel tank control unit, Airbag Off
16 A/C system (control unit) 10
1
light, light switch (switch illumination), diagnos-10
tic connector
17 Tire pressure monitoring system (control unit) 5
18
Not used
ABS, ASR, ESP, brake light switch
5 19
Not used
3 AFS headlight (left) 5
Not used
Oil level sensor (extended maintenance interval)
(WIV), tire pressure monitoring system, switch
21 Fuel injectors (gasoline engine) 10
4 for Electronic Stability Program (ESP), AFS head-5 Wind deflector (Roadster) 30
lights (control unit), A/C system (pressure sen -23 Horn 20 sorl, backup light switch
Automatic headlight range control, AFS head-
24 Transmission (control unit) 15
5
light (right)/ manual headlight range control, 5/10
25 Heater rear window Coupe/heated rear window 30/20
halogen headlights Roadster
Control unit for CAN data transfer (gateway),
26 Driver's side power window 30
6 electromechanical steering, automatic transmis-5
27 Passenger's side power window 30
sion shift gate
28 Not used
Acoustic Park Assist, automatic dipping interior
rear view mirror, garage door opener, heatable
29 Washer pump 15
7
windshield washer nozzles, washer pump, wind 5
30 Cigarette lighter 20
deflector relay (Roadster)
31 Starter 40
8
Haldex clutch 5 32 Steering column module 5
9
Control unit Audi magnetic ride 5 33
Instrument cluster 5
Airbag control unit 5 34 Radio navigation system, radio 15
1 1 Mass airflow sensor, crankcase heating 5/10
35
Audio amplifier 30
12 Door control unit (central locking driver/passen-10
36 Engine (control unit) 10 ger)
13 Diagnostic connector 10 37 CAN (Gateway) 5
Rain sensor, automatic transmission shift gate 5 38 Not used
15 Roof
light (interior lighting) 5 39 Not used
• Do-it
-yourself service

_______________________________________________ F_ u_ s _ e_s _ a _ n_d _ b_ u_ l_ b_ s __ ffllll
•
No. II Equipment Amps
8
Ignition coils (4 -cylinder)/ignition coils (6 -cylin -20/30 der)
-
9 Engine (control unit) 25
Water pump delayed-off 10
11 Feed (clutch pedal, brake pedal) 5
12
Activated charcoal filter/charge pressure con-10 trol valve (4-cylinder)
--
Bulbs
Replacing light bulbs
For your safety, we recommend that you have your autho­
rized Audi dealer replace burned out bulbs for you.
It is becoming increasingly more and more difficult to replace
vehicle light bulbs since in many cases, other parts of the car must
first be removed before you are able to get to the bulb. This applies
especially to the light bulbs in the front of your car which you can
only reach through the engin e compartment .
Sheet metal and bulb holders can have sharp edges that can cause
serious cuts, and parts must be correctly taken apart and then prop­
erly put back together to help prevent breakage of parts and long
term damage from wa ter that can enter housings that have not
been properly resealed.
For your safety , we recommend that you have your authorized Audi
dealer replace any bulbs for you, since your dealer has the proper
tools, the correct bulbs and the expertise.
Gas discharge lamps (Xenon lights)*:
•
Due to the high electrical voltage, have the bulbs replaced by a qual­
ified technician. Headlights with Xenon light can be identified by the
high voltage sticker.
& WARNING
Contact with high-voltage components of the electrical system
and improper replacement of gas discharge (Xenon) headlight
bulbs can cause serious personal injury and death.
• Xenon bulbs are pressurized and can explode when being
changed.
• Changing Xenon lamps requires the special training, instruc­
tions and equipment .
• Only an authorized Audi dealer or other qualified workshop
should change the bulbs in gas discharge lamps.
& WARNING
There are parts with sharp edges on the openings and on the bulb holders that can cause serious cuts.
• If you are uncertain about what to do, have the work performed
by an authorized Audi dealer or other qualified workshop. Serious
personal injury may result from improperly performed work.
[ i] Tips
• If you must replace the light bulbs yourself, always remember
that the engine compar tment of any vehicle is a hazardous area to
work in. Always read and heed all WARNINGS =>
page 212, "Engine
compartment"=> &.
• It is best to ask your authorized Audi dealer whenever you need
to change a bulb. •
Do-it-yourself service

________________________________________________ E_ m_ e_r ,,::g c..e_ n _ c..::y;._ s_ i_t _u _a_ t_ i_o _n_ s _ ___.ffllll
& WARNING !continued)
• Before you check anything in the engine compartment, always
read and heed all WARNINGS~ page 212, "Engine compartment".
0 Note
• Applying a higher voltage booster battery will cause expensive
damage to sensitive electronic components, such as control units,
relays, radio, etc .
• There must be no electrical contact between the vehicles as
otherwise current could already start to flow as soon as the positive
(+) terminals are connected.
[ i) Tips
The discharged battery must be properly connected to the vehicle's
electrical system. •
Use of jumper cables
Make sure to connect the jumper cable clamps in exactly
the order described below!
Fig. 182 For jump
starting or charging
the battery, there is a
jump start connection
on the left side of the
engine compartment . Fig. 183 Jump
start
using the battery in
another vehicle: A -
Discharge, B-Female
socket
On vehicles with the 6-cylinder engine, instead of the
battery, on the left side of the engine compartment there is
a
Jump start connection=:> fig. 182. For jump starting, open
the cover on the positive terminal.
Preparatory measures
1. Do not jump start a frozen battery! Replace such a
battery!
2. Otherwise apply the hand brake and shift into idle gear if
your vehicle has manual transmission, and put the
selector lever into P position if your vehicle has auto ­
matic transmission.
3. For both vehicles switch off all consumers and the igni­
tion.
Connecting/disconnecting the jumper cable.
4. Connect one end of the red jumper cable to the positive
terminal
G) =:> fig. 183 in the external starting point@ of
your vehicle .
5. Connect the other end of the red jumper cable to the
positive terminal
® of the booster battery®·
Vehicle care Do-it-yourself service irechnical data

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Emergency towing with commercial
tow truck
General hints
Your Audi requires special handling for towing.
The following information is to be used by commercial tow truck
operators who know how to operate their equipment safely.
• Never tow your Audi, towing will cause damage to the engine
and transmission.
• Never wrap the safety chains or winch cables around the brake
lines.
• To prevent unnecessary damage, your Audi must be transported
with a car carrier (flatbed truck).
• To load the vehicle on to the flat bed, use the towing loop found
in the vehicle tools and attach to the front or rear anchorage
=> page 281 and=> page 282.
& WARNING
A vehicle being towed is not safe for passengers. Never allow
anyone to ride in a vehicle being towed, for any reason. •
Front towing loop
Do not install the front towing loop until it is needed.
Fig. 184 Front
bumper: removing the
grill
Fig . 185 Front
bumper: screwing
in
the towing loop
The towline eye fits into the threaded hole located on the
right side of the front bumper behind the grill.
- Remove the screwdriver and towing loop from the
vehicle toolkit=>
page 262.
-Insert the screwdriver into the slot as shown and press
toward the center of the vehicle => fig. 184. At the same
time, pull the grill forward and out.
- Screw the towing loop tightly into the threaded hole as
far as it will go => fig. 185.
~
Vehicle care Do-it-yourself service irechnical data

_______________________________________________ C _o_ n _ s_u _ m_ e_ r_l_n _f_o _ r_ m_ a_ t _i _o _ n __ _
workshop personne l in order to assure proper performance, reli ­
abil ity and sa fe ty of the vehicle a nd i ts many sys te m s.
I mproper maintenance, adjustments and repairs can impair the
operation and reliabil ity of your vehicle and even void your vehicle
war ra nty. T here fore, proof o f serv ic ing in accorda nce with the main ­
tenance schedule may be a condition for uphold ing a possible
war ra nty claim made withi n th e warranty per iod .
Above all, operat ional safety can be adverse ly affected, creating
unnece ssary risks fo r you and you r passengers .
If in doubt about a ny servici ng, have it do ne by your authorized Aud i
dea ler or any other properly equipped and qua lified workshop. We
str ongly u rge you to give your auth orized Audi dealer the oppo rtu ­
nity to perform al l scheduled maintenance and necessary repairs.
You r deale r has the facil ities, origi nal par ts and trained special is ts
to keep your vehic le running proper ly.
Performing limited maintenance yourself
T he fo llow ing pages describe a limited numbe r of procedures which
can be perfo rme d on you r vehicle wi th ordi nary too ls, should the
need arise and trained personne l be unavailab le. Before performing
any of these proced ures, always thor oug hly read a ll of th e appli­
cable text and carefu lly fo llow the instructions given. Always rigor ­
ously observe the
WARNINGS provided .
Before you check anything in the engine compartment , alway s read
and heed all WARNINGS:::>
& and:::> & in "Wo rking in the engine
compartment" on
page 220.
& WARNING
• Ser ious persona l injury may occur as a result of improperly
performed maintenance , adjustments or repairs.
• Always be e xtremely careful when working on the vehicle .
Always follow commonly accepted safety practices and general
c ommon sense . Never ri sk per sonal injury .
Controls and equip­ ment Safety first Vehicle operation
& W
ARNING (continued )
• Do not attempt any of the maintenance , checks or repairs
described on the following pages if you are not fully familiar with
these or other pro cedures with respect to the vehicle , or are uncer­
tain how to proceed.
• Do not do any work without the proper tools and equipment.
Have the necessary work done by your autho rized Audi dealer or
another properly equipped and qualified workshop .
• The engine compartment of any motor vehicle is a potentially
hazardous area . Never reach into the area around or touch the
radiator fan . It i s temperature controlled and can switch on
suddenly -even when the engine is off and the ignition key has
been removed . The radiator fan switche s on automatically when
the coolant reaches a certain tempe rature and will continue to run
until the coolant temperature drops .
• Always remove the ignition key before anyone gets under the
vehicle.
• Always support your vehicle with safety stands if it is neces­
sary to work underneath the vehicle. The jack supplied with the
vehicle is not adequate for this purpose and could collapse
causing serious personal injury .
• If you must work underneath the vehicle with the wheels on
the ground, always make sure the vehicle is on level ground , that
the wheels are always securely blocked and that the engine
cannot be started .
• Always make sure the transmission selector lever (automatic
transmission) is in "P" (Park position ) (automatic transmission ) or
Neutral (manual tr ansm ission) and the hand brake is firmly
applied.
• Chang ing t he e ngine sett ings wi ll a dverse ly affect em ission
levels. This is detrimenta l to the environment and increases fuel
co nsu mp tion.
Vehicle care Do-it-yourself service Tec hn ica l da ta