2008 AUDI TT ROADSTER octane

Fue l sup ply and fillin g your fu el tank
Fuel supply and filling your fuel tank
Gasoline
Fuel supply
Using the right fuel helps keep the environment clean and
prevents engine damage.
Fu el r eco mmend ati on
The fuel recommended for your vehicle is unleaded pr em ium grade
gasoline . See also =>
page 291, "Data". Audi recommends using TOP
TIER Detergent Gasoline with a minimum octane rating of 91 AKI (95
RON). For more information on TOP TIER Detergent Gasoline, please
go to the official website (www.toptiergas.coml.
The recommended gasoline octane rating for your engine can a lso
be found on a label located on the ins ide of the fuel filler flap. This
rating may be specified as AKI or RON .
Your vehicle may also be operated us ing un leaded regu lar gasoline
with a minimum octane rating of 87 AKl/91 RON. However, using 87
AKl/91 RON octane fuel will slight ly reduce engine performance .
Use u nlea d ed ga solin e only. Unleaded gasoline is available
throughout the USA, Canada, and in most European countries . We
recommend that you do not take your vehicle to areas or countries
where unleaded gasoline may not be available.
For more information on refueling your vehicle, see=>
page 215 .
O ctane ra tin g
Octane rating indicates a gasoline's abil ity to resist engine
damaging "knock" caused by premature ignition and detonation.
Therefore, buying the correct grade of gasoline is very important to help prevent possible engine damage and a loss of engine perfor­
mance. Gasoline most commonly used in the United States and Canada has
the following octane ratings that can usual ly be found on the filler
pump:
• Premium Grade: 91 -96 AKI
• Regular Grade : 87 -90 AKI
Explanation of the abbreviations:
AKI = Anti Knock Index= (R +Ml/2 = (RON +MON)/2
RON= Research Octane Number
MON = M otor Octane Number .
0 Note
• Do not use any fuel with octane ratings lower than 87 AK I or 91
RON otherwise expensive engine damage will occur .
• Do
not use leaded gaso line! The use of leaded gasoline will
severely damage your vehic le's cata lytic converter and its abi lity to
contro l exhaust emissions. •
Blended gasoline
Use o f gaso line containin g alco ho l o r MTB E (met hy l
t e rt iary butyl e th er)
You may use unleaded gaso line blended with alcohol or MTBE
(common ly referred to as oxygenates) if the blended mixture meets
t he fo llowing criteria:
Bl end of g asoline m eth anol (wood alcoho l or methyl al coh ol)
• Anti-knock index must be 87 AKI or higher.
• Blend must contain no more than 3% methanol.
• Blend must contain more than 2% co-so lvents.

___ C_ o_n_ s_ u_m _ e_ r_ ln_ f_ o _r _m _ a_ t_ i_o _n ______________________________________________ _
standards. Therefore, vehicles built for the U.S .A. and Canada differ
from vehicles sold in other countries.
If you plan to take your vehicle outside the continental limits of the
United States or Canada, there is the possibility that
• unleaded fuels for vehicles with catalytic converter may not be
available;
• fuel may have a considerably lower octane rating. Improper fuel
may cause engine damage;
• service may be inadequate due to lack of proper service facilities,
tools or testing equipment;
• replacement parts may not be readily available .
• Navigation systems for vehicles built for the U.S.A. and Canada
will not necessarily work in Europe , and may not work in other coun­
tries outside of North America.
0 Note
Audi cannot be responsible for mechanical damage that could
result from inadequate fuel , service or parts availability .•
Audi Service Repair Manuals and
Literature
Audi Official Factory Service Manuals are published as soon as
possible after model introduction. Service manuals are available
from :
Audi Technical Literature Ordering Center
Call toll -free:
Tel.: 1 (800) 544-8021
(from 8:00 AM to 8:00 PM, EST, Monday through Friday)
or access their website www.audi.ddsltd.com on the Internet to
order repair manuals and other Audi literature. •
Maintenance
General
Your vehicle has been designed to help keep maintenance require­
ments to a minimum. However, a certain amount of regular mainte­
nance is still necessary to assure your vehicle 's safety, economy and
reliability. For detailed vehicle maintenance consult your Mainte­
nance & Warranty booklet .
Under difficult operating conditions, for example at extremely low
outside temperatures, in very dusty regions, etc., some service work
should be performed between the intervals specified . This applies
particularly to:
• oil changes , and
• cleaning or replacing the air filter.
~ For the sake of the environment
By regularly maintaining your vehicle, you help make sure that emis ­
sion standards are maintained, thus minimizing adverse effects on
the environment. •
Important considerations for you and your
vehicle
The increasing use of electronics, sophisticated fuel injection and
emission control systems, and the generally increasing technical
complexity of today's automobiles, have steadily reduced the scope
of maintenance and repairs which can be carried out by vehicle
owners. Also, safety and environmental concerns place very strict
limits on the nature of repairs and adjustments to engine and trans­
mission parts which an owner can perform.
Maintenance, adjustments and repairs usually require special tools,
testing devices and other equipment available to specially trained .,_

__ _!:_A~l'.!:p~ h~ a~ b~e~ t~ic ~a..'.... l ~in~d~e ~x~ --------------------------------------------
Proper disposal of drained brake fluid ...
230
Proper disposal of drained engine
coolant . ............ .... ...... . 228
Proper disposa l of drained engine oil
225,226
Recycling used engine oil ..... .... 225
Un leaded fuel .... ............... 214
What should I do with an old battery?
231
EPC
See Electronic power control . . . . . . . . 17
ESP
See Electronic Stability Program .... 184
Event Da ta Recorder (EDR) . . . . . . . . . . . 184
Expansion tank 228
F
Fan 100
Radiator . . . . . . . . . . . . . . . . . . . . . . . . 229
Flat tire Changing ....................... 267
Floor mats . . . . . . . . . . . . . . . . . . . . . . . . . 134
Fog lights, front ..................... 73
Folding master key with remote contro l . 47
Fo lding top .. ..... .. .... .... ........ 60
Automatic folding top . . . . . . . . . . . . . 62
Care and cleaning ...... ........ .. 203
Emergency operation . . . . . . . . . . . . . . 64
General . .... ... .. .... .... ...... .. 60
manual folding top ........... ..... 61
Warning/indictor lights .. ........ .. 18
Wind deflector . . . . . . . . . . . . . . . . . . . . 64 Foot pedals
. . . . . . . . . . . . . . . . . . . . . . . . 134
For the sake of the env ironment
Gasoline fumes and the environment 2 16
Letting your engine warm up . ..... 107
Reducing engine noise by early
upshifting .................. .... 12
Refueling ... .. .... .... .... ...... 216
Saving fuel by early upshifting ...... 12
Front airbags Description ..... ..... ...... ...... 150
How they work . . . . . . . . . . . . . . . . . . . 155
Front seats . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Adjusting ......... .... .... ...... 131
Adjusting the manual seats .. .... ... 89
Child restraints in the front seat .... 147
Fronta l col lisions and the laws of physics ...
138
Fuel Additives .. ....... .... .......... 214
Blended gasoline ................. 214
Consumption .. ............. ...... 39
Fi ller neck . .... ........ ... ....... 215
Fuel gauge . . . . . . . . . . . . . . . . . . . . . . . 14
Gasoline ........... ... .... .... .. 214
Gasoline additives .... .... ... .. ... 215
Octane rating ... .. .... .... .... ... 214
Recommendation . . . . . . . . . . . . . . . . 214
Refuelling ..... ........ .... ... ... 216
Reserve .. .... ....... ...... .... ... 14
Tank capacity . .... ... .... ..... ... 291
Unlocking the fuel filler flap by hand 218
Fuel fi ller cap ......... .... .... ... .... 24
Fuel supply too low ........ ....... ... 35 Fuse
arrangement .... ... .. .. . .... .. . 274
G
Garage door opener ... .......... .... 121
Gas discharge lamps ...... ... .... ... 277
Gauges Engine coolant temperature ........ 13
Fuel gauge .... .... ....... .... .... 14
Tachometer ........... ...... .... . 12
Gearshift lever
6 -speed manual transmission ... ... 113
Generator Warning/indicator lights ............ 19
G lossary of tire and loading terminology ...
239
G love compartment ...... .... .... .... 96
Gross Vehicle Weight Rating (GVWR) ... 289
H
Head restraints ........ ... ........ .. 132
Adjusting .. ........... .... .... .. 132
Headlight Defective . . . . . . . . . . . . . . . . . . . . . . . . . 36
Headlight range control
defective .......... .... ....... .... 35
Headlights .... ....... .... ... .... .... 69
adaptive light ...... ........ .... ... 72
Front fog lights ... .... .... .... .... 73
Switching off ... .... ...... .... .... 69
Switching on ...... .... ....... .... 69
Washer system . . . . . . . . . . . . . . . . . . . 79

__ _:._A..:.:l:.!: p :...:h..:.: a== b:..:e :...:t :.:..ic =-= a..:..l ..:.:in :..:..:: d:...:e :...:x-=-----------------------------------------------
Lights
Bi-Xenon headlights ... .... ...... .. 75
Coming-home/leaving-home-function 73
Emergency flasher . . . . . . . . . . . . . . . . 75
Front fog lights . . . . . . . . . . . . . . . . . . . 73
Headlights . . . . . . . . . . . . . . . . . . . . . . . 69
High beam . . . . . . . . . . . . . . . . . . . . 69, 76
High beam warning/indicator light ... 18
Instrument pane l illumination . ...... 74
Side marker lights . . . . . . . . . . . . . . . . . 69
Turn signals .. ..... ....... .... .... 76
Loading the luggage compartment 135
Locking Power locking switch . . . . . . . . . . . . . . 53
Rear lid/trunk lid .... .. ...... ... .. . 55
Remote control key . . . . . . . . . . . . . . . . 51
Using the key . .... .... .... ..... .. . 53
Luggage compartment Ligh t ........... .... .... ......... 77
Loading . . . . . . . . . . . . . . . . . . . . . . . . 135
Ski bag .. ... ..... .... .... ...... .. 93
Lumbar support ...... .... ........... 91
M
Maintenance ... .. ...... ...... .... .. 294
Malfunction Indicator Lamp (MIU 18 , 26
Manual folding top
closing ........ .... ..... ......... 61
Manual transmission ...... .... ...... 113
Maste r key . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Battery replacement . . . . . . . . . . . . . . . 49
Menu button . . . . . . . . . . . . . . . . . . . . . . . . 28 Menu
display . . . . . . . . . . . . . . . . . . . . . . . . 27
Mileage Average .......... .... ....... .... 39
Instantaneous .. .... .. .... .... .... 39
Mirror Inside rearview mirror, manua l ...... 82
Mirrors Activa ting the digital compass . .... . 85
Anti-glare rearview mirror . ...... ... 82
Automatic d imming for the outs ide
mirrors .............. .... ..... .. 84
Automatically dimm ing inside mirror . 82
Manual glare dimming ... .... ...... 82
Outside mirrors .......... .... .... . 83
Monitoring the Advanced Airbag System
157
N
Natural leather 209
New tires and wh eels ... ... ... .... ... 249
NHTSA Contacting . . . . . . . . . . . . . . . . . . . . . . 136
Number of seats . . . . . . . . . . . . . . . . . . . . 137
0
Occupan t seating positions . . . . . . . . . . . 130
Octane rating .... .. . .. ... .... ... ... 214
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Oil See Engine oil ....... ... .. ..... .. 222
Older children and safety belts . . . . . . . . 177 On-Board Diagnostic System (OBD)
Data Link Connec tor (DLC) . .... ..... 26
Electronic speed limiter ... ........ . 26
Malfunction Indicator Lamp (MIU .... 26
Open door or rear lid warning .. .... .... 24
Opening folding top
manually .. .... .... .... ...... ... .. 61
Operate your vehic le economically and mini-
mize pollution . ...... .... ..... .. 194
Optional equipment Marked with an asterisk .. ...... ..... 6
Outside mirrors ... ... .. .... .. ... .... . 83
Outside temperature display ... .... .. .. 23
Owner's manual How the Owner's Manual is organized . 6
p
Paint
Touch-up ......... .............. 205
Paint No. . . . ... ... .. .... .... .... ... 288
Parking ...... .... .... ........... .. . 108
Automatic transmission .... .... .. . 114
Parking brake . .. .. .. .... .... .... ... 108
Parking brake warn ing . ... .... .... ... . 30
Parking light
Defective . . . . . . . . . . . . . . . . . . . . . . . . . 36
Parking on a decline (downhil l) . ... .... 108
Parking on an incline (uphill) ...... .... 108
Parts replacement .... .... .... .... ... 296
PASSENGER AIR BAG OFF light .... .... 157
Passive safety system . . . . . . . . . . . . . . . 128