2008 AUDI TT ROADSTER change wheel

Instruments and warning/indicator lights
Brake system BRAKE (USA)/ (CD) (Canada)
This warning/i ndi cat or light illumina tes whe n th e brake
fluid level i s to o low or w hen t here is a malfuncti on in the
ABS , or w hen the pa rkin g br ake is set.
The ligh t illumin ates when the igniti on is turned on . It goes out aft er
th e engine has been started and the parking brake is fu lly r eleased.
Th is i ndicates that t he bra ke w arning ligh t is f uncti oning properly .
If the brake warning light does not light up when the engine is
cranking or the parking brake is applied , there may be a malfunction
in the electrical system. In thi s case , contact your Audi dealer.
When the light com es on, an acoustic warn ing signa l will sound .
Parking brake set
The BRAKE warning/indicator light illuminates when the parking
br ak e i s set :::::,& .
& WARNING
• USA model s.~ If both , the BRAKE warning light and the ~
warning light come on at the same time , the rear wheels could
lock up first under hard braking . Lo ck-up of the rear wheel brakes
can cause loss of vehicle control and an accident . Have your
vehicle repaired immediately by your authorized Audi dealer or a qualified workshop . Drive slowly and avoid sudden, hard brake
application.
• Canada models : If both , the b rake warning light
((j)) and the ABS
warning light come on at the same time , the rear wheels could
lock up first under hard brak ing . Lock -up of the rear wheel brakes
c an cause loss of vehicle control and an accident. Have your
vehi cle repaired immediately by your authorized Audi dealer or a
qualified workshop . Drive slowly and avoid sudden , hard brake
application
• If the brake warning /indicator light does not go out after a few
seconds and the parking brake released , or lights up while you are
& WARNING (continued)
driving , the fluid level in the brake fluid reservoir is too low . If you
believe that it is safe to do so, proceed immediately at low speed
to the nearest authorized Audi dealer or qualified workshop and
have the brake system inspected.
• Please be very careful and always keep in mind that after
several brake applications, you will need greater pressure on the
brake pedal to stop your vehicle . Consequently , you must allow for
increased braking distances. Trying to brake as qui ckly as usual
c ould lead to an ac cident . •
Anti-lock brake system 8 (USA)/
~ (Canada)
This warni ng /ind icato r lig ht moni tors the AB S and the
electronic differenti al lock (EDL).
The light will come on for a few seconds when the ignition is
switched on. The light wil l go out after an automatic check sequence
is completed.
There is a malfunction in the ABS when :
• The warnin g/i ndica to r l ight do es no t illumin ate when you swi tch
on the ignition .
• The warn ing/i ndi cator lig ht does not go ou t after a few seconds .
• T he warning/indicator l ight il luminates whi le driving.
The brake system will still respond even without the assistance of
the ABS system. See your authorized Audi dealer as soon as possible to restore full braking performance . For more in for mati on
regarding t he ABS=> page
189.
The ABS warning l ight and the brake warning light come on
together . The ABS will not work and you will notice a change in
braking response and performance .

• Tire pressure must only be adjusted when the temperature of the
tires is about the same as ambien t air temperature.
• When tires are replaced, the sensors and valves should not be
exchanged. The valve core, nut, valve sea ling and sea l washer
(replacement kit) needs to be replaced. If necessary, the valve and
the wheel electronics have to be rep laced .
• If you should put different wheels and tires on your vehicle (e.g.
winter wheels and tires), you must be certain that the wheels and
tires are compatible with the tire pressure monitoring system.
Otherwise the system will register a malfunction and a fault
message will be displayed. For more information, contact your Audi
dea ler.
• Adjust the tire pressure and store the pressure in the tire pres ­
sure monitoring system to the load you are carrying .•
Significant loss of air pressure \-,1
The yellow symbol appears in the event of a significant
loss of air pressure.
Fig. 28 Display: yellow
symbol with message
If the • warning light in the instrument cluster comes on
and then the ( symbol appears in the display~ fig. 28,
pressure in at least one t ire is too low.
Controls and equip ­
ment
Driver inform ation system
Stop driving as soon as possible without endangering
yourself and other drivers on the road .
- Inspect all tires.
Change the tire if necessary ~ page
267.
The ._ warning light in the instrument cluster comes on when the
tire is significantly underinflated .
In addition, the tire symbol(_, appears in the display together with
the message
Please check tire pressure => fig. 28.
After a few seconds, the message disappears again. If you would
like to show the message again, press the Set/Check button
=>
page 12, fig. 2 ©-
[ i ] Tips
• In the case of an intentional loss of air pressure, for example,
when re -adjusting tire pressure, this has to be stored again after ­
wards=> page 44.
• Tire pressure must only be adjusted when the temperature of the
t ires is about the same as ambient air temperature.
• The yellow symbol disappears, when the tire pressure is
corrected and the new pressure is stored in the system=>
page 44.
• After changing a wheel or replacing a wheel with the spare tire
you have to adjust the tire pressures on a ll wheels. In add ition , you
must then initia lize the new tire pressures in the tire pressure moni ­
toring system =>
page 44. •
I • •

Driver inf ormation sy ste m
Storing tire pressures
Correct storage of specified pressure is the basic require­
ment for reliable tire pressure monitoring.
F ig . 29 S ET -butt on:
T ire pressure mon i­
t or ing syste m
In order for the tire pressure monitori ng system to operate
appropr iately, you have to re-save the specified p ressures
whenever you adjust tire pressures, for example when the load co nd ition of your vehicle changes. Proceed as fo llows:
Corr ecting tir e pr es sure
Check the pressure in the t ires.
- Adjust air pressure as needed to comply w ith the infor­
mat ion on the label located on the driver's side B -pillar
(visible when the door is open) .
Saving tire pressures
-Turn on the igniti on.
- Press the button :::> fig. 29 for app rox imately 5 seconds.
You will hear a beep and the symbol in the instrument
cluster flashes three t imes .
All pressure warning indicators in the d isplay will be canceled. Following each intentional change in specified pressures, ti
re pres ­
sures must be resaved.
After the pressures are saved, the tire pressure monito ring system
measures the current tire pressures and saves them as the new
spec ified pressures .
[ i ] Tip s
• The tire pressure is shown on the tire pressure labe l. The tire
pressur e lab el is located on the driv er's sid e B-pillar (visible when
the door is open). The tire pressure label l ists the recommended
cold tir e inflation pr essur es for the vehic le at its maximum capacity
weigh t and the tires that were on your vehicle at the time it was
manufactured . For recommended tire pressures for norma l load
conditions, please see chapter~
page 242.
• The tire pressure monitoring syst em he lps the driver to keep an
eye on tire pressures. But the driver still has the responsibility for
maintaining the cor rect tire pressure .•
Wheel change
If a wh eel is ch anged , the wheels tha t were exchan ged
have to be re -programmed.
- Tu rn on the ignition.
- Press the button :::> fig. 29 for approximately 5 seconds .
You will hear a beep and the symbol in the button flashes
three times.
Programming is necessary :
• after the t ires have been rotated on the vehicle, or the spare tire
is used,
• if tires with new wheel sensors are used .
All pressure warning indicators in the disp lay wil l be canceled . The
system malfunction error message will not disapp ear until the .,_

vehicle is underway. With pressing the button=> fig . 29, the re­
programming of the new sensors and storing of actual pressures
starts . This learn ing phase can take up to 10 minutes driving time.
During the learning process the tire pressure monitoring system is
not avai lable. •
Malfunctions T =»'\,AC.:
A malfunction can have various causes.
Fig. 30 Display:
System malfunction
If the t warning light in the instrument cluster flashes for approxi ­
mately one minute and then remains continuously illuminated and
additionally the
r fin'-=> fig. 30 symbo l appears in the display, the
tire pressure monitoring system is not available. This can have
various causes .
• If the message appears at the end of the learning process, the
system cannot recognize the wheels installed on the vehicle. This
can be because one or more wheels without a whee l sensor were
installed.
• A wheel sensor or other component may have failed .
• During initia lization the system has detected more than 4 wheels
on the vehicle, for example whi le driving next to another car with a
tire pressure monitoring system.
Controls and equip ­
ment
Driver inform ation system
• A wheel change was made but the button => page 44, fig. 29 was
not pressed .
• Audi replacement parts were not used.
• If snow chains are being used, system function can be compro­
mised due to the shielding properties of the chains.
• The tire pressure monitoring system may not be available
because of a radio malfunction.
• Transmitters with the same frequency, such as radio head ­
phones in the vehic le or radio equipment, can cause a temporary
disruption of the system through excessive e lectromagnetic fields.
• Eliminate the interference if possible/if you can and then
proceed as follows: Turn off the engine for 20 minutes . Then drive
another 10 min. If the warning light comes on again, you should
contact your authorized Audi dealer immediately to have the
problem corrected.
• Do not use commercially available tire sealants. Otherwise, the
e lectrica l components of the tire pressure monitoring system will
no longer work properly and the sensor for the tire pressure moni­
toring system will have to be replaced by a qualified workshop. •
Certification
This device complies with part 15 of the FCC rules and RSS-210.
Operation is subject to the following conditions:
• this device may not cause harmful interference, and
• this device must accept interference received, includ ing interfer ­
ence that may cause undesired operation.
The receiver 5WK49069 uses the same schematic, assembly, layout
and PCB as 5WK49097 . 5WK49097 is a multi channe l receiver and
5WK49069 is a single channel receiver. They only differ in: SAW -
Filter V1_4 was changed from A2C00038979 to V1_2 A2C00032378,
Inductor L5_3 and L6_233nH were changed to L5_2 and L6_2 47nH.
BAND PASS FILTER V3_2 was changed from A2C00038762 to V3_3
A2C00036085. V 10: ATIC75 C1, A2C000029505 was changed to V10: .,,,
I • •

Clear vision
• your vehicle is being towed by a tow truck or if you are towing
another vehicle behind you. •
Turn signals -¢ ¢ and high beam ~D lever
The lever on the left side of the steering column is used to
operate the turn signals and the high beam as well as the
headlight flasher.
Fig. 69 Turn signa l and
high beam leve r
The turn signal and high beam lever has the following func ­
tions:
Turn signals ¢ Q
- Lift the lever up all the way ~ fig. 69, to use the right turn
signals, or push the lever down all the way to use the left
turn signals .
Auto-blink
-Move the lever (up or down) just to the point of resis ­
tance to use the turn signals for as long as you need
them, for example when changing lanes. - Briefly
move the lever up or down just to the point of
resistance and then release it to flash the turn signals
three times in succession. This feature allows to indicate
lane changes clearly and with minimum effort when
driving on highways.
High beam [D
- Push the lever forward to switch on the high beam.
- Pull the lever back towards you to switch off the high
beam.
Headlight flasher [D
- Pull the lever toward the steering wheel to use the head­
light flasher.
Notes on these features
• The turn signals only work with the ignition switched on . The
indicator lights ¢ or¢ in the instrument cluster => page 16 also
blink .
• After you have turned a corner, the turn signal switches off auto ­
matically.
• The high beam works only when the head lights are on . The indi­
cator light ~D in the instrument cluster i lluminates when the high
beams are on.
• The headlight flasher works only as long as you hold the lever -
even if there are no lights switched on. The ind icator light ~D in the
instrument cluster illuminates when you use the headlight flasher .
0 Note
Do not use the high beam or headlight flasher if you know that these
could be blinding oncoming traffic. •

Clear vision
Wiper and washer system
Windshield wiper ~
The windshield wiper lever controls both the windshield
wipers and the washer system.
Fig. 72 Wiper lever:
windshield wiper lever
positions
T he windshield wiper lever :::::> fig. 72 has the following posi­
tions:
One -touch wiping
Move the lever to position G), when you want to wipe the
windshield
briefly.
Intermittent wiping ~ l (activating rain sensor)*
Move the lever up to position 0-
- Move the interval set switch@, to change the inter vals .
Low wiper speed
-Move the lever up to position ©-
High wiper speed
- Move the lever up to position @.
Automatic wiper/washer
- Pull the lever to position© (toward the steering wheel)
and hold.
- Re lease the lever . The washer stops and the wipers keep
going for about four seconds .
Turning off the wipers
-Move the lever back to position @.
The windshield wipers and washer only work when the ignition is
turned on. If you switch off the ignition with th e windshield wiper
lever still in the interval wipe position and then come back a while
later and drive off, the rain sensor will reactivate itse lf after the
vehic le speed has exceeded 4 mph (6 km/h).
The rain sensor* is only activated with the wiper lever set to posi­
tion
G) . When it starts to rain, the rain sensor will automatically acti ­
vate the intermittent wiping mode.
To reduce the sensitivity of the sensor , move switch
@ down . To
increase the sensitivity , move the switch up. The higher you adjust
the sensi tivity, the faster the sensor will react when it senses mois­
ture on the windshield. The pauses between wiper turns depend not
only on the sensitivity setting , but on the vehicle speed as well.
During brief stops , e.g. at a r ed light, wiper mot ion wil l automati ­
cally be reduced to the next lower speed. Wipers a lready turning at
low speed . change to intermittent wip ing.
When the igni tion is turned on, the washer jets are heated.
& WARNING
• Wiper blades are crucial for safe driving! Only when they are in
good condition are they able to clear the windows properly to
provide uncompromising visibility. Worn or damaged wiper blades
are a safety hazard~
page 81 , "Replacing front wiper blades"! ..,_

___ A_ ir_ b_ a-g _ s_y _s_ t_ e_ m _________________________________________________ _
Repair, care and disposal of the airbags
Parts of the airbag system are installed at many different places on
your Audi. Ins tal li n g, r em ovin g, s erv ic ing o r re pairi ng a part in an
area of the veh icle can damage a part of an a irbag system and
prev ent th at system from working pr oper ly in a c ollisio n.
There are some important things you have to know to make sure
that the effect ive ness of the system will not be impai red and that
discarded co mpone nts do not cause inju ry or po llute t he env iro n­
ment .
& WARNING
Improper care , servicing and repair procedures can increase the
r isk of personal injury and death by preventing an airbag from
deploying when needed or deploying an airbag unexpectedly:
• Never cover , obstruct , or change the steering wheel horn pad
or airbag cover or the instrument panel or modify them in any way.
• Never attach any objects such as cup holders or telephone
mountings to the surfaces covering the airbag units.
• For cle aning the horn pad or instrument panel , use only a soft ,
dry cloth or one moi stened with plain water. Solvents or cleaners
could damage the airbag cover or change the stiffness or strength
of the material so that the airbag cannot deploy and protect prop ­
erly .
• Never repair , adjust , or change any parts of the airbag system.
• All work on the steering wheel , instrument panel, front seats or
electrical system (including the installation of audio equipment ,
cellular telephones and CB radios, etc .} must be performed by a
qualified technician who has the training and spec ial equipment
ne cessary .
• For any work on the airbag system , we strongly recommend
that you see your authorized Audi dealer or qualified workshop .
• Never modify the front bumper or parts of the vehicle body.
& WARNING (continued)
• Always make sure that the side airbag can inflate without inter­
ference :
- Never install seat covers or replacement upholstery over the
front seatbacks that have not been specifically approved by
Audi .
- Never use addit ional seat cushions that cover the areas
where the side airbags inflate.
- Damage to the original seat covers or to the seam in the area
of the side airbag module must always be repaired immedi ­
ately by an authorized Audi dealer .
• The airbag system can be activated only once . After an airbag
has inflated, it must be replaced by an authorized Audi dealer or
qualified technician who has the technical information , training
and special equipment necessary.
• The airbag sy stem can be deployed only once . After an airbag
has been deployed , it must be replaced with new replacement
parts designed and approved especially for your Audi model
version. Replacement of complete airbag systems or airbag
components must be performed by qualified workshops only .
Make sure th at any airbag service action is entered in your Audi
Maintenance
& Warranty booklet under AIRBAG REPLACEMENT
RECORD .•
Other things that can affect Advanced Airbag
performance
Changing the vehic le 's suspension system can change the way that
th e A dva nced Ai rbag Sys te m p erform s in a c ras h. F or example,
using tire -rim combinations not approved by Audi, lowering the
ve hicle, c hanging the stiff ness of th e sus pensi on, in clud ing the
springs, suspens ion struts, shock absorbers etc . can chang e the
forces that a re measured by the airbag sensor s and sent to the e lec -
tronic control unit. Some suspension changes ca n, for example, .,_

increase the force levels measured by the sensors and ma ke the
a irbag sy ste m d eploy in crashes in which it wou ld not deploy if the
changes had no t been made . Other kinds of changes may reduce
the force levels measured by the sensors and prevent the airbag
from deploying when it should.
The sensors in the safety belt buckle for the driver and front
passenger seat te ll the electronic control module i f the safety belt is
latched or not. If the safety belt is being used, the front airbag will
deploy at a sligh tly h igher rate of vehic le d ece leration than if the
safety belt is not being used. Therefore , in a particular co llision , it is
possible that an ai rbag will not deploy at a seating position where
the safety belt is being used but will inflate at the posi tion where the
safety belt is not being used . It is important tha t nothing interfere
with the safety belt buckles so t hat the sensors can send the co rrect
information about safe ty belt use to the elec tronic control unit.
& WARNING
Changing the vehicle's suspen sion including use of unapproved
tire -rim combinations can change Advan ced Airbag performan ce
and in crease the risk of serious personal injury in a cra sh.
• Never in stall su spen sion compone nts that do not have the
same performance characteristics as the components originally
in stalled on your vehi cle.
• Never use tire -rim combination s that have not been approved
by Audi.
& WARNING
Items stored between the safety belt bu ckle and the center
console can cau se the sen so rs in the buckle to send the wrong
inform ation to the ele ctron ic control module and prevent the
Advanced Airbag System from working properly .
• Always make sure that nothing can interfere with th e safety
belt buckle s and that they are not obstructed.
Safety first
Airbag sy ste m
ffi For the sake of the environment
Undeployed airbag modu les and pretensioners might be classified
as Perchlorate Material -specia l handling may apply, see
www.dtsc .ca.gov/hazardouswaste/perchlorate. When the vehicle or
parts of the restraint system including airbag modules safety belts
with prete nsioners are scrapped, all appl icable laws and regu la­
tions must be observed . Your au thori zed Audi dealer is familiar wi th
t hese requirements a nd we rec ommend that y ou have your dea ler
perform this service for you. •
Knee airbags
Description of knee airbags
The air bag system can pr ovide supplemen tal pr otec tio n
to pro perly restrained fron t seat occupants.
Fi g. 13 4 D rive r's
airba g
The ai rbag for the driver is located in the instrument panel under ­
neath the steering wheel:=:, fig. 134 , the airbag for the passenger is
at about the same height in the instrum ent panel underneath the
glove compartment.
T he knee airbag offers add itional protection to the driver 's and
p assenger 's knees and upper and lower thigh areas as a supple -
ment to the safety belts . •
Vehicle care I I irechnical data