2008 AUDI TT ROADSTER instrument panel

How knee airbags work
The risk of injury to the leg area is reduced by fully
deployed knee airbags.
F ig . 13 5 Infla te d
a ir b ags protect ing i n a
fr ont al co llisio n
The knee airbag system has been designed so that the airbags for
the driver and front passenger are deployed in certain but not all
frontal co llisions .
I f the front airbags deploy, the knee airbags also deploy in frontal
col lisions above a certain severity.
When the system is deployed, the airbags start to fill with a propel ­
lant gas, and inflate between the lower part of the instrument panel
and the driver and the lower part of the instrument panel and the
front passenger ~
page 155, fig. 132 .
Although they are not a soft pillow, they can "cushion" the impact and in this way they can help to reduce the risk of injury to the lower
extremities .
All this takes place instantaneously, so fast that many people don 't
even reali ze that the a irbags have deployed. The airbags a lso inflate
with a great deal of force and it is important for occupant safety that
nothing should be in their way when they dep loy.
Ful ly inflated airbags in combination with properly worn safety belts
s low down and limit the occupant's forward movement and he lp to
reduce the risk. •
Safety first
Airbag sy ste m
Important safety Instructions on the knee
airbag system
Airbags are only supplemental restraints. Always wear
safety belts correctly and ride in a proper seating position.
There is a lot that you and you r passengers must k now and do to
help the safety belts and airbags to provide supplemental protec­
tion.
& WARNING
An inflating knee airbag can cau se se riou s inju ry . We aring safety
belt s inc orrectl y and improper seat ing po sitio ns incre as e th e risk
of seriou s pers on al injur y and death whenever a vehi cle i s be ing
u sed .
• The airbag sy stem cannot p rotect you properly if you ar e
s eat ed too clo se t o any of the a irbag l ocation s. When adju sting
their seat position s, it is important that both the driver and the
fro nt pass e nger ke ep thei r upper bod ies and knee s at the
following minimum safe di sta nces:
- 10 in che s (25 cm ) betwe en the che st and the ste ering
whee l/in strument pan el.
- 4 in ches (1
O c m ) between the knee s and the lo wer part of the
in strum ent panel .
• The r isk of per sonal injur y in crea ses if you le an forw ard or t o
t he side, or if the seat i s improperly po sitioned an d you are not
w ea ring your safet y belt . The r is k i ncreases even more should the
airbag deplo y.
• Alway s m ake su re that the knee airb ag can inf late witho ut
interferen ce. Obje cts betwe en your self and the airba g can
in crease the ris k of inju ry in an a ccident b y inte rferi ng w ith the
wa y th e airbag deploy s or b y being pushed into you a s the airbag
deploy s. •
Vehicle care I I irechnical data

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& WARNING (con tinued )
-No persons (children ) or animals should ride in the footwell
in front of t he passenger s eat . If the airbag deploy s, thi s can
result in serious or fatal injuries .
- No objects of any kind should be carried in the footwell area
in front of the driver's or pa ssenger' s seat. Bulky objects (shop­
ping bag s, for example ) can hamper or prevent p roper deploy ­
ment of the airbag . Small objects can be thrown through the
vehicle if the airbag deploys and injure you or your passenger s.
• Make sure there are no cra cks , deep scratches or other damage
in the area of the in strument panel where the knee airbags are
located .
• If ch ildren are incorrectly seated , their risk of injury increases in
the case of an accident =>
page 168, "Child Safety". •
Side airbags
Description of side airbags
The air ba g s ystem c an pro vid e sup plemen tal p ro tection
to p rope rly re straine d front seat occup ants.
Fig . 13 6 Side airbag
locat ion in the driver 's
seat
T he side airbags are located in the sides of the front seat backrests
=> fig . 136 facing the do ors. T hey ar e id en tified by the word
"AIRBAG ".
The side airbag system basically consists of :
• the e lec tro nic c ontrol m odule an d ex ternal sid e im pact sens ors
• the two side airbags located in the sides of the front backrests
• the airbag war ning light in the instrument clus ter .
T he airbag system is monitored electronicall y to make certain that
it is functioni ng properly at all times . Each time you turn on the igni ­
tion, the airbag system indicator light will come on for a few
se co nds (self diag nostics).
The side airbag system supplements the safety belts and can help
to reduce the risk of injury to the drive r's and fr ont passenger's
upper torso on the side of the vehicle that is struck in a side co lli ­
s ion. The ai rbag deploys only in side impacts and only when the
vehic le acc ele ration re gis te red by the control unit is high eno ugh . If
this rate is below the refe rence va lue programmed into the control
unit, the s ide airbags will no t be tr iggered, ev en thoug h the car may
be badly damaged as a resu lt of the co llision. It is not possible to
de fin e an ai rb a g trigge ring r ange t hat wi ll cov er ev er y possible
angle of impact , since the circumstances will vary considerab ly
bet ween one collision a nd an othe r. Importa nt fac tors include, fo r
example, the na ture (hard or soft) of the impacting object, the ang le
o f im pact, vehicle speed , et c.
=> p age 166, "Importan t safety
i nstructions on th e side airba g sys tem".
Aside from their normal safety function, safety belts wo rk to h elp
ke ep the drive r or front passenger i n pos ition i n th e ev ent o f a side
col lision so that the side ai rbags can provide pro tec tion .
T he airbag system is
not a su bstit ute for y our sa fety belt . Ra the r, it
is part of the overa ll occupa nt restrain t system in your vehicl e.
A lwa ys reme mber tha t the side ai rbag sys tem can only help to
pro tect you if you are w ear ing your sa fety bel t and wear ing it prop ­
e rly. Th is is another reason why you should always wear your safety .,

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& WARNING
Improperly installed child safety seats increase the risk of serious
personal injury and death in a collision.
• 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
• 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.
• 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 .
• Always read and heed all WARNINGS whenever using a child
restrained in a vehicle is being used=>
page 168. Special precau­
tions apply when installing a child safety seat on the front passenger seat=>
page 147, "Child restraints on the front seat -
some important things to know" .
& 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 157, ''Monitoring the
Advanced Airbag System".
& WARNING (continued)
• If the PASSENGER AIR BAG OFF light does not come on and stay
on whenever the ignition is switched on 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 . Have the airbag system inspected immediately by your Audi
dealer.
• Improper installation of child restraints can reduce their effec­
tiveness or even prevent them from providing any protection .
• An improperly installed child 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 .
in. 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.
• 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.
~

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•
[ i ] Tip s
Open Ve lcro fasteners on your cloth ing can damage the seat cover .
Please make sure that Ve lcro fasteners are closed .•
Plastic parts and instrument panel
Always use a c lean cloth moistened in clear water to clean these
areas . For persis tent dirt use an Audi approved
solvent -free plastic
cleaner/protectant.
& WARNING
Solvents can change the propertie s of some plastics and make it
harder for the airbag to deploy .
• Never clean the instrument p anel or the surface of Airbag
modules with cleanin g prod ucts that contain solvents .
• Products containing solvent s will make the surface of th is part
poro us.
• Serious injuries can re sult if pla stic parts come loo se when the
airbag is deployed .
• Alway s read and heed all WARNING S and the i nformation
~ page 200 .
0 Note
Cleaning agents containing solvents wil l attack the material and can
change the way it behaves. •
Instrument cluster glass
-Clean the g lass w ith a soft, damp cloth.
I n order to preserve the anti -glare properties of the instrument
c luster glass, it should o nly be cleaned wi th a so ft. dam p clot h.•
App lies to veh ic les: with nat ural leat her
Natural leather
Aud i m akes gre at effo rts to maint ain th e pr oper ties,
n atur al look and feel of interi or le ather.
Gener al
We offe r many d ifferent types of leathe r on our vehicles. Mo st are
different types of nappa leather , which has a smooth surface and
comes in various co lo rs.
The intensity o f the color determ ines the visua l characteristics and
appearance. If the surface of the leather has a typical natura l look,
then t he leather is a nappa lea ther that has bee n left in a re latively
natura l condition. This leather offers particu lar ly good comfort and
b reathes well. Fi ne veins, closed g ra ins, insect bites, skin folds, an d
subtle variations in co lor remain visib le. These characteristics
dem onstrate that the mater ial is natural.
Natura l nappa leather is not covered by a co lor finish . It is therefore
more sensitive to soil ing and wear, which is something you need to
consider if chi ldren, animals or other fac tors might prove to be
particularly hard on the leather.
By con trast, leather types that are covered by a colo red fin ish layer
are more durable. This has a positive effect on the leather's resis ­
tance to wea r and s oiling i n daily use . On the ot her hand, the typical
characteristics of natura l leather are barely or not apparent .
However, this does not mean that the leather itself is of inferior
qua lity .
Care and handling
Because of the exclusive nature of the types of leather that Audi
u ses and thei r unique p rope rties (suc h as sens it ivity to oi ls, g rease,
soi ling, etc .), you wi ll need to be somewhat careful w ith these
leathers, and a certain type of care is required. For example, dark .,.
Vehicle care I t •

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Checking and filling
Engine hood
Releasing the engine hood
The engine hood is released from inside the vehicle.
- Open the driver's door .
Fig. 147 Driver's side
footwell: engine hood
release lever
- Pull the release lever on the left under the instrument
panel => fig. 147 in the direction of the arrow.
The hood pops up slightly under spring pressure. •
Opening the engine hood
Fig. 148 Release lever
under the engine hood
Before opening the engine hood, make sure that the wind­
shield wipers are flat against the windshield. Otherwise,
they could damage the paint on the hood.
Lift the hood slightly =>& .
Pull up on the release under the hood=> fig. 148. This
releases the catch.
- Open the hood all the way.
The hood is kept in the open position by two gas struts.
& WARNING
Hot engine coolant can burn you.
• To reduce the risk of being burned, never open the hood if you
see or hear steam or coolant escaping from the engine compart­
ment. Wait until no steam or coolant can be seen or heard before
carefully opening the hood. •
Vehicle care I I irechnical data

Fuses and bul bs -
------------------
Fuses and bulbs
Fuses
Replacing a fuse
A problem in the electrical system may be caused by a
blown fuse.
Fig . 178 End face o f
i n str ume nt pan el:
re m ov ing cover pla te
t o access f uses
Fig . 179 Left si de o f
engine co mpartm ent:
fu se cover
Fus e cove r on the left end face of the instrum ent
panel
- Switch off the ignition and the e lectr ica l component
affected . - Carefully pry the fuse cover off the instrument panel
using the ignition key or a screwdriver=> fig. 178.
- C heck the fuse listing on the next pages to find out w hich
fuse belongs to the component which has failed => page 274, "F use Location, Instrument Pane l le ft".
- Remove the blown fuse with the plastic clip provided .
The clip is located on the holder in the fuse box .
Replace a blown fuse (recognizable by the melted metal
str ip inside) with a fuse of the same amperage.
- Firmly snap the cover back onto the instrument panel
face.
Fuse cov er in engin e compartment
- Switch the ignition a nd the affec ted co nsumer off .
- Unlatch the fuse cover, push the two s lides forward
=> fig . 179.
- Find out which fuse belongs to the equipment which
stopped working=> page 276, "Fuse location, left side of
engine compartment".
- Remove the plastic from its retainer in the fuse box cover (left face end of the instrument pane l), place it on the
fuse in question and pull it out.
- If the fuse is burned out (recognizable by melted strips of metal), replace it with a new fuse of the same rating.
- Replace the fuse cover.
- Push the two slides to the rear=> fig. 179 . Install the fuse
cover carefully to prevent water from entering. .,
Vehicle care Do-it-yourself service irechnical data

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The various electrical circuits are protected by fuses . The fuses are
clustered in a central ized unit. The unit is located behind the face
panel at the end of the instrument panel.
Two spare fuses and a sticker identifying the fuses are located on
the inside of the fuse box cover.
You are wel l advised to keep a supply of spare fuses in your vehicle .
Fuses with the proper ampere ratings are availab le at your autho­
rized Audi dealer .
& WARNING
Never replace a fuse with one that has a higher amperage rating .
• A fuse with a too high amperage could damage the electrical
part and cause a fire.
0 Note
• On no account should fuses be repaired (e.g. patched up with tin
foil or wire) as this may cause serious damage elsewhere in the elec­
trical circuit or cause fire.
• If a fuse blows repeatedly, do not keep replacing it. Instead, have
the cause for the repeated short circuit or overload tracked and
fixed. •
Fuse Location , Instrument Panel left
Fig. 180 Fuse carrier
behind the instrument
panel end face, cover
removed
Some of the equipment items listed are optional or only available on
certain model configurations .
Note that the following table is accurate at the time of going to
press and is subject to change. In the event of discrepancies , the
label on the inside of the cover always takes precedence.
The power seats are protected by circuit breakers , which automati­
ca lly reset after a few seconds after the overload has been reme-
died. _,.

___ A_l.:,. p _h_ a_ b_e _t _i c_ a_l _i n_ d_e _x ____________________________________________ _
Convertible locking retractor . . . . . . . 177
Important safety instructions for using child safety seats .. ..... .. .. .... 171
Important things to know when driving with chi ldren . .... .... ... .... ... 168
Infant seats .. ........ ....... .... 173
Older children and safety belts ..... 177
Safety belts and older children . . . . . 177
Which restraint system should my older child wear? .. .... .... ... ... .... 177
Child safety seat .... .... ... .. ...... . 173
Convertible locking retractor . . . . . . . 177
Installing ..... ............ ...... 177
Ch ild safety seats
How do I properly install a chi ld safety
seat in my vehicle? .. ... .... . .. .. 171
Safety instructions . . . . . . . . . . . . . . . 171
Cigarette lighter ... ..... ... ....... ... 95
Cleaning Alcantara (synthetic suede) . . . . . . . . 211
E ngine compartment ... .. .... .... 212
Fabrics and fabric coverings . ...... 208
Instrument panel ... .. .... ... .... 209
Interior ...... .... .... .... .... ... 208
Leather . . . . . . . . . . . . . . . . . . . . . . . . . 210
P lastic and viny l .. .... ....... .... 204
Plastic parts ..................... 209
Safety belts . . . . . . . . . . . . . . . . . . . . . 212
Trim strips .................. 204, 205
Cleaning and protection ... .. .... .... 200
Climate control A/C operation . . . . . . . . . . . . . . . . . . . . 102
Air distribution . . . . . . . . . . . . . . . . . . 101
Air ven ts . . . . . . . . . . . . . . . . . . . . . . . . 1 02 Automatic mode .
. . . . . . . . . . . . . . . . 101
Defrost . . . . . . . . . . . . . . . . . . . . . . . . . 101
Economical use .................. 103
Fan ... .... ....... .... .... .... .. 100
Heated seats . . . . . . . . . . . . . . . . . . . . 104
Rear window defogger . . . . . . . . . . . . 103
Switching on and off ..... ... .. ... 100
Climate controls ... .. .... ..... .. ... .. 98
Air recirculation mode .. .... ...... 102
Controls ......................... 98
Dust filter ..... ............... .... 98
Heating ........ ... .... .... .... ... 98
Pollen fi lter .. ...... .... .... .... ... 98
Venti lation .... .... .... .... .... ... 98
Clock ... ... .. .... ..... .. ... ... .... .. 13
Co ld tire inflation pressure . ...... .... 242
Coming -home -function ............... 73
Compass mirror ..... .... ... ... .. .... 85
Consumer In formation .... .... ... 136, 293
Contacting NHTSA . . . . . . . . . . . . . . . . . . 136
Con trols and displays . . . . . . . . . . . . . . . . 11
Conve nience close/open feature
P o wer top . . . . . . . . . . . . . . . . . . . . . . . . 63
Windows ... .. .... .... .... .... ... 58
Convertible chi ld seats
How do I proper ly install a convertib le
chi ld seat in my vehic le? ... .... .. 174
Safety instructions ............... 174
Convertible locking retractor Activating ... .. ..... .. .... .... ... 1 79
Deactivati ng . . . . . . . . . . . . . . . . . . . . . 180
Using to secure a chi ld safety seat . . 177,
179 Coolant System
Expansion tank 228
Coolant system ...... .... .... .... ... 227
Cornering light .... ....... ....... .... 72
Cruise contro l ...................... 110
Changing speed ................. 111
Presetting your speed ............. 111
Switching off . .... ..... ... .... ... 111
Switching on .. .... .... ..... .. ... 110
Warning/indicator l ights ........... . 19
Cruising range ..... ... .... .... ...... . 39
Cup holder . ...... .... .... ... .... .... 94
D
Damp ing
See Audi magnet ic ride ..... .... ... 112
Data .......... ... ....... .... ...... 291
Data recorder . ........ ... .. .... .... 184
Date display .. .... .... ............... 13
Daytime running lights ......... ...... 71
Daytime running lights (Canada) ...... . 71
Declaration of conformity ............. 45
def What does this mean when it appears in the trip odometer disp lay? .. ...... 14
Defrosting the windows ............. . 101
De termining correct load li mit ... .. ... 247
Digital clock . .... .... ..... .. ..... .... 13
Setting the time ................... 13
Digital compass ... ....... .... ...... . 85
Digital speedometer ...... .... .... .... 2 4