fuel cap AUDI A8 2013 Owners Manual

Adjusting the disp lay and the warning
tones. ..... .. .. .. .. .... ... .. .. .. 131
Er ror messages . . . . . . . . . . . . . . . . . . 131
Trailer hitch . . . . . . . . . . . . . . . . . . . . . 131
Homelink ® . . . . . . . . . . . . . . . . . . . . 132
Universal remote control . . . . . . . . . . . 132
Safety fir st . . . . . . . . . . . . . . . . . . . . 134
Driving Safely . . . . . . . . . . . . . . . . . 134
General notes . . . . . . . . . . . . . . . . . . . . 134
Proper occupa nt seating positions . . . 135
Driver and passenger side footwell . . . 139
Pedal area . . . . . . . . . . . . . . . . . . . . . . . 139
Stowing luggage . . . . . . . . . . . . . . . . . 140
Report ing Safety Defects . . . . . . . . . . . 1 42
Safety belt s . . . . . . . . . . . . . . . . . . . 144
Gene ral notes . . . . . . . . . . . . . . . . . . . . 1 44
Why s afety be lts? . . . . . . . . . . . . . . . . 1 45
Safety belts . . . . . . . . . . . . . . . . . . . . . 147
Safety belt pretens ioners . . . . . . . . . . 150
Airbag system . . . . . . . . . . . . . . . . . 152
I mportant things to know . . . . . . . . . . 152
F ront airbags . . . . . . . . . . . . . . . . . . . . 156
Monitoring the Advanced Airbag
System . . . . . . . . . . . . . . . . . . . . . . . . . 163
Knee airbags . . . . . . . . . . . . . . . . . . . . . 167
Side airbags . . . . . . . . . . . . . . . . . . . . . 170
Side curta in a irbags . . . . . . . . . . . . . . . 173
Ch ild Safety . . . . . . . . . . . . . . . . . . . 176
Important th ings to know . . . . . . . . . . 176
C hi ld safety seats . . . . . . . . . . . . . . . . . 182
I nstall ing a chi ld safety seat . . . . . . . . 186
L A TC H L owe r ancho rages and tethe rs
for chi ld ren . . . . . . . . . . . . . . . . . . . . . . 189
Addit ional Information
195
Audi pre sense . . . . . . . . . . . . . . . . 196
Preventat ive passenger p rotec tion 196
Vehi cle operation . . . . . . . . . . . . . 198
Intelligent technology .. .. .. .. 198
Notice about data recorded by vehicle
control modules . . . . . . . . . . . . . . . . . . 198
Electronic Stabilization Control (ESC) . 198
Table of contents 3
Bra ki ng . . . . . . . . . . . . . . . . . . . . . . . . . 200
Servotronic ® -advanced power
stee ring system . . . . . . . . . . . . . . . . . . 202
Driving with your quattro ® . . . . . . . . . 203
Energy management . . . . . . . . . . . . . . 203
Driving and environment . . . . . 206
The first 1,000 miles (1,500 km) and
afterwards . . . . . . . . . . . . . . . . . . . . . . 206
Catalytic co nverter . . . . . . . . . . . . . . . . 207
Avoid damaging the vehicle . . . . . . . . . 207
D riv ing throug h wate r on roads . . . . . 208
Operate yo ur vehicle economi cally and
min imize poll ution . . . . . . . . . . . . . . . . 208
Trailer towing . . . . . . . . . . . . . . . . . 211
Driving with a trailer . . . . . . . . . . . . . . 211
T rai le r tow ing tips . . . . . . . . . . . . . . . . 213
Vehicle care . . . . . . . . . . . . . . . . . . . 2 15
Cleaning and protection . . . . . . 215
General information . . . . . . . . . . . . . . 215
Care of exterior . . . . . . . . . . . . . . . . . . 215
Care of interior . . . . . . . . . . . . . . . . . . . 222
Fuel supply and filling your
fuel tank . . . . . . . . . . . . . . . . . . . . . . .
228
Gasoline . . . . . . . . . . . . . . . . . . . . . . . . 228
Fuel tank. . . . . . . . . . . . . . . . . . . . . . . . 229
Checking and filling . . . . . . . . . . . 232
Engine hood . . . . . . . . . . . . . . . . . . . . . 232
E n gine compartment . . . . . . . . . . . . . . 234
Engine o il . . . . . . . . . . . . . . . . . . . . . . . 235
Engine cooling system . . . . . . . . . . . . . 240
Br ake fluid . . . . . . . . . . . . . . . . . . . . . . 242
B attery . . . . . . . . . . . . . . . . . . . . . . . . . 243
Windsh ie ld/hea dligh t washer
container ... .... ... .. .. ..... ... .
247
Tires and wheels . . . . . . . . . . . . . . 249
T ires . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Tire pressure monitoring system 267
Do-it-yourself service . . . . . . . . . 270
What do I do now? . . . . . . . . . . . . 270
Tr unk escape handle . . . . . . . . . . . . . . 2 70
Emergency warning triangle . . . . . . . . 270
•
•

20 Instruments and warning /indicator lights
the rear wheels could lock up first under
hard braking. Rear wheel lock-up can
cause loss of vehicle control and an acci­
dent . Have your vehicle repaired immedi­
ately by your authorized Audi dealer or a
qualified workshop . Dr ive slowly and
avo id sudden, hard brake applicat ions.
(0) Wo rn b rake pad s
liJ Brake pads!
If the warn ing l ight illuminates, immediately
contact your authorized Audi dealer or quali­
fied workshop to have all brake pads inspect­ ed. On USA models the warni ng light
liJ
comes on together with the warning light
1111 -Both sets of brake pads on an axle
must always be replaced at the same time .
A WARNING
Driving with bad brakes can cause a colli­
sion and serious personal injury .
- If the warning light
liJ and the warning
light
11111 ) with the message Brake
pads!
comes on in the instrument cluster
display, immediately contact your au­
thorized Aud i dealer or qualified work­
shop to have all brake pads checked or
replaced if necessary.
EPC Electronic powe r cont rol
This warning/indicator light monitors the
electronic power control .
The~ warn ing/ indicator light (Electronic
Power Control) illuminates when you switch
the ignition on as a function check .
(D Tips
If this warning/indicator light illuminates
while you are dr iving, then there is a mal­
function in the engine electron ics. Have
the malfunction corrected as soon as pos­
sible by your authorized Aud i dealer or
qualified repair facility.
l) - : USA mod els only
-
o Malfunction Ind icator Lamp (MIL )
The Ma lfunction Indicator Lamp (MIL) is pa rt
of the On-Board Dia gnostic (OBD II) system.
The symbo l
¢-ff lights up when the ignition is
switched on and will turn off after the engine
has started and has settled at a constant idle
speed. This indicates that the MIL is work ing
proper ly.
The warning light illuminates when there is a
malfunction in the engine electronic system.
Contact your authori zed Audi dea ler and have
the malfunction corrected.
An improperly closed fuel filler cap may also
cause the MIL light to illuminate
c:> page 230.
For more information c:> page 28.
!?) Engine speed lim itation
Applies to vehicles: wit h engine speed li mitatio n
lfl Engine speed maximum XXXX RPM
The eng ine speed is automatically limited to
the speed displayed in the driver information
system . This protects the engine from over ­
heating.
T he eng ine speed limitation deactivates once
the engine is no longer in the critical tempera­
ture range and you have re leased the accele ra­
tor pedal once.
If the engine speed limitation was activated
by an engine control malfunction, the indica ­
tor light~ also turns on . Make sure that the
speed does not go above the speed displayed .
Drive to your authorized Audi dealer immedi­
ately to have the malfunction corrected .
· ~ Engine oil level
Ill Add oil, max. x qt (l). You may cont inue
driving
When the symbol Ill and driver message ap­
pear, add the amount of oil appearing in the
display at the next opportunity
c:> page 238.

28 Instr uments and warning/indicator lights
Open door/hood /rear lid warning
Fig. 14 Display : doors and rear lid open
With the ignition switched on, the warning il­
luminates when at least
one door or the hood
or the rear lid is not closed . The symbol also
shows you
which door(s) or lid is not closed .
In the illustration
c:> fig. 14 it is the driver's
door and the left rear door.
On-Board Diagnostic
system (OBD)
Malfunction Indicator Lamp (MIL }
The Malfunction Indicator Lamp (MIL)¢• in
the instrument cluster is part of the On-Board
Diagnostic (OBD II) system.
The warning/indicator light illuminates when
the ignition is switched on and goes out after
the engine starts and the idle has stabilized .
This indicates that the MIL is working proper ­
ly .
If the light does not go out after the engine
is started, or illuminates while you are driv­
ing, a malfunction may exist in the engine sys­
tem .
If the light illuminates, the catalytic con­
verter could be damaged.
Continue driving
with reduced power (avoid­
ing sustained high speeds and/or rapid accel­
erat ions) and have the condition corrected .
Contact your authorized Audi dealer .
If the light illuminates, the electronic speed limiter may also be malfunctioning. For more
information
c:> page 29, Electronic speed
limiter .
An improperly closed fuel filler cap may also
cause the MIL light to illuminate
c:> page 230.
On-Board Diagnostics
Fig. 15 Location of Data Link Connector (DLC)
On-Board Diagnostics monitors the compo­
nents of your em iss ion contro l system . Each
monitored component in your engine system
has been assigned a code . In case of a mal­
function, the component will be identified
and the fault stored as a code in the control
module memory.
The MIL light may also illuminate if there is a
leak in the on-board fuel vapor recovery sys­
tem .
If the light illuminates after a refueling,
stop the vehicle and make sure the fuel filler cap is properly closed
c:> page 230.
In order to make an accurate diagnosis, the
stored data can only be displayed using spe­
cial diagnostic equipment (generic scan tool
for OBO) .
In order to connect the specia l diagnostic
equipment, push the plug into the Data Link
Connector (OLC). The DLC is located to the
right of the hood release
c:> fig. 15.
Your authorized Aud i dealer or a qualified
service station can interpret the code and per­
form the necessary repair.
A WARNING ""-=--
Do not use the d iagnost ic connector for
personal use. Incorrect usage can cause
malfunctions, which can increase the risk
of a collision!
-

72 Seats and storage
-When not in use, to reduce fuel consump­
tion, wind noise and to guard against theft.
A WARNING
- Use of an unapproved roof rack or incor­
rect mounting of an approved roof rack
can cause the roof rack or the items at­
tached to it to fall off the roof onto the
road .
- Objects falling from the roof of a vehicle
can cause a crash and personal injury .
- Only mount the roof rack on the desig­
nated locations on the roof
c::> fig. 7 4.
-The roof rack system must be installed
exactly according to the instructions pro­
vided.
- When driving with a roof rack system,
changes to the center of gravity and wind
resistance can change the vehicle han­
dling and lead to a collision . Always
adapt your driving and your speed to the
current conditions.
- Your vehicle warranty does not cover any
damages to the vehicle caused by using
roof racks or mounting structures not
approved by Audi for your vehicle. The
same applies to damage resulting from
incorrect roof rack installation.
- Always check the roof rack mountings
and hardware before each trip and dur­
ing a trip to make sure everything is se­
curely tightened. If necessary, retighten
the mountings and check the entire sys­
tem from time to time.
- After mounting a roof rack system, or
when you transport objects on the roof
of your vehicle, the height of the vehicle
is naturally increased. Be careful when
driving under low bridges or in parking
garages for example . This could cause
damage to the load and even the vehicle itself.
- Make sure the open rear lid and the sun­
roof* do not come into contact with the
roof rack.
Loading the roof rack
Always distribute loads evenly. Make sure
anything on the roof rack is securely tied
down.
.. Always distribute the loads on the roof rack
evenly .
.. Always attach items to the roof rack secure-
ly before you drive off.
The maximum permissible roof weight is
220
lb (100 kg).
The roof weight is the total of
the weight of the roof rack, the attachments
and the cargo you are carrying. You must also
not exceed the maximum load weight for the
roof rack you are using.
When using a roof rack system which has a lower load carrying capacity, you must not use
up the total maximum permissible load carry­
ing capacity specified above. Instead, you
should load the roof rack system only to the
maximum capacity specified by the manufac­
turer of the roof rack system .
A WARNING ,_
Weak, damaged or improper straps used
to secure items to the roof rack can fail
during hard braking or in a collision and
cause serious personal injury .
- Make sure the roof rack is installed exact­
ly as specified above
c::> page 71.
-Always use suitable mounting straps for
securing items to the roof rack to help
prevent items from shifting or flying for­
ward .
- Items on the roof rack must always be securely mounted .
- The use of a roof rack can negatively af­
fect the way a vehicle handles . Cargo
that is large, heavy, bulky, long or flat
will have a greater negative influence on
the vehicle's aerodynamics, center of
gravity and overall handling. Always
drive slowly, avoid sudden braking and
maneuvers when transporting cargo on
the roof of your vehicle.

78 Warm and cold
Warm and cold Climate controls
Description
The climate control system warms, cools and
adds humidity to the air in the vehicle interior.
It is the most effect ive when the windows and
sunroof* are closed . If the temperature inside
the parked vehicle becomes very warm, open­ ing the window briefly will speed up the cool­
ing process.
I n all heating mode functions except
defrost,
the blower on ly switches to a higher speed
once the engine coolant has reached a certain
temperature.
Condensation from the cooling system can
drip and form a puddle of water under the ve­
hicle. This is normal and does not mean there
is a leak.
Pollutant filter
The pol lutant filter removes pollutants such
as dust and pollen from the air.
The air pollutants filter must be changed at
the intervals spec ified in you r Warranty
&
Maintenance booklet, so that the air condi­
tioner can properly work.
I f you drive your vehicle in an a rea with high
a ir po llution, the fi lter may need to be
changed more frequent ly than specified in
your Aud i Warranty
& Maintenance booklet. If
in doubt, ask your authorized Audi Service Ad­
visor for advice .
Key coded settings
The climate control settings are a utomat ically
stored and assigned to the remote control key
that is in use.
A WARNING
Reduced visibility is dangerous and can
cause accidents. -
- For safe driving it is very important that
all windows be free of ice, snow and con­
densation.
- Comp letely familiarize yourself with the
proper use and funct ion of the heat ing
and ventilation system and especially how to defog and defrost the windows.
- Never use the windshield wiper/washer
system in freez ing weather unt il you
have warmed the windshield first, using
the heating and ventilation system. The
washer solution may freeze on the wind­ sh ie ld and reduce visib ility.
(D Note
- If you suspect that the air conditioner has been damaged, switch the system
off to avoid further damage and have it
inspected by a qualified dealership.
- Repairs to the Audi air conditioner re­
quire special technical know ledge and
special tools. Contact an authorized Aud i
dea ler fo r assistance.
@ For the sake of the environment
By reducing the amount of fuel you use,
you also reduce the amount of pollutants
emitted into the air.
(D Tips
- Keep the air intake s lots (in fro nt of the
w indshield) free from ice, snow and de ­
bris in order to maintain the proper func­
tion of the climate control system.
- T he energy management system may
switch the seat heating* or rear window
defroster off temporari Ly . These systems
are available again as soon as the energy
balance has been restored.
- Air escapes through vents under the rear
window. When placing items of clothing
on the luggage compartment cover, en­
sure that the openings are not covered.

-Blend must contain not more than 15%
MTBE.
Seasonally adjusted gasoline
Many gasoline grades are blended to perform
espec ially we ll for winter or summer driving.
During seasonal change-over, we suggest that
you fill up at busy gas stat ions where the sea­
sonal adjustment is more likely to be made in
time .
(D Note
-Methanol fuels which do not meet these
requirements may cause corrosion and
damage to plastic and rubber compo­
nents in the fuel system .
- Do not use fue ls that fail to meet the
specified criter ia in this chapter.
- If you are unable to determine whether
or not a particular fue l blend meets the
specifications, ask your service station or
its fuel supp lier.
- Do not use fuel for which the contents
cannot be identified.
- Fuel system damage and performance
problems resulting from the use of fuels
different from those specified are not
the responsibility of Audi and are not
covered under the New Vehicle or the Emission Control System Warranties.
- If you experience a loss of fuel economy
or driveability and performance prob­ l ems due to the use of one of these fuel
blends, we recommend that you switch
to unblended fuel.
Gasoline additives
A major concern among many auto manufac­
turers is carbon deposit build- up caused by
the type of gasoline you use.
Although gasoline grades differ from one manufacturer to another , they have certain
things in common. All gasoline grades contain
substances that can cause deposits to collect
on vital engine parts, such as fuel injectors
and intake valves. Although most gasoline brands include additives to keep engine and
Fuel supply and filling your fuel tank 229
fuel systems clean, they are not equally effec ­
tive .
A udi recommends using TOP TIER Detergent
Gasoline. For more info rmation on TOP TIER
Detergent Gasoline, please go to the official
website (www.toptiergas.com).
After an extended period of using inadeq uate
fuels, carbon deposit build-ups can rob your
engine of peak performance.
Q) Note
Damage or malf unct ion due to poor fue l
quality is not covered by the Aud i New Ve­
hicle Limited Warranty.
Fuel tank
Fuel filler neck
The fuel filler neck is located on the right rear
side panel behind the fuel fille r flap.
If the power locking system should fail, you
can still open the flap manually -for deta iled
instruct ions see ¢
page 231.
You can find the fuel tank capacity of your ve­
hicle in
Technical Data ¢ page 292.
The label on the inside of the fuel fi ller flap
tells you the correct fue l for your vehicle. For
more information about fuel specifications,
see ¢
page 228.
Your vehicle fue l tank has an on board refuel­
li ng vapor recovery system. This feature helps
to prevent fuel vapors from escaping from the
tank and polluting the environment while you refuel your vehicle . In order to fill the tank
properly while protecting the environment,
please fo llow this refueling procedure careful­
ly.
_&. WARNING
Under normal operating conditions, never
carry additional fuel containers in your car.
Gas canisters and other containers used to
transport f uel can be dangero us. Such con­
tainers, full or empty, may leak and could
cause a fire in a collision. If you must
•
•

230 Fuel supply and filling your fuel tank
transport fuel to use for your lawn mower,
snow blower, etc., be very careful and al­
ways observe local and state laws regard­
ing the use, transportat ion and storage of
such fuel containers. Make certain the con­
tainer meets industry standards (ANSI/
AS TM F852 -86) .
(D Note
Never drive your vehicle until the fuel tank
is completely empty. The irregular supply
of fuel can cause misfiring. Gasoline could
enter the exhaust system and damage the
catalyt ic converter.
Refuelling
Fig. 190 Right rear vehicle side: Opening the fuel filler
flap
Fig . 191 Fuel filler flap with attached fuel cap
When activating the central locking, the fuel
fi ller flap is automatically un locked or locked.
Refuel the vehicle with the ignition switched
off.
Taking the fuel cap off
~ Press the left side of the fue l filler flap to
open it
q fig. 190 -arrow-.
~ Unscrew fuel filler cap counter-clockwise
and hang it on the fuel filler flap¢
fig. 191.
Refuelling procedure
~ Insert the fu el nozzle from the gasoline
pump into the fuel filler neck as far as it will
go .
~ Select a medium refuelling rate so that the
nozzle switches off automatically when the
tank is full.
Putting the fuel cap back on
~ After fi lling your tank, twist the fuel filter
cap clockwise as far as it w ill go.
~ Close the fue l filler flap.
T o avoid fuel spilling or evaporating from the
fuel tank always close fuel filler cap properly
and completely. An improperly closed fuel fill­
er cap may also cause the MIL lamp¢
page 28
to come on.
A WARNING
Improper refue ling or handling of fuel can
cause fire, explosion and severe burns.
- Fuel is highly flammable and can cause
severe burns and other injur ies.
- Failure to shut the engine
off while refu­
eling and/or to insert the pump nozzle
fully into the fuel filter neck could cause
fuel to spray out of filler neck or to over­
flow. Fuel spray and overflowing fuel can
cause a fire.
- Never use a cellular telephone while re­
fue ling. The electromagnet ic rad iat ion
can cause sparks that can ignite fuel va­
pors and cause a fire.
- Never get back into your vehicle whi le re­
fueling.
If in exceptional circumstances
you must get back in your vehicle while
refueling, make certain that you close
the door and touch metal to discharge
static electricity before touching the fill­
er nozzle again. Static electricity can
cause sparks that can ignite fuel vapors
released during refueling.
- Never smoke or have an open flame any­
where in or near your veh icle when refu­
eling or filling a portable fuel container.
- For your safety, we strongly recommend
that you do not travel with a portable

fuel container in your vehicle. The con­
tainer, full or empty may leak and could
cause a fire, especially in a crash.
- If, under exceptional circumstances, you
must transport a portable fuel container,
please observe the following:
- Never fill a portable fue l container
while it is anywhere in or on the vehicle
(for example, in the luggage compart­
ment, or on the tr unk). Static electrici­
ty can build up while filling and can ig­ nite fuel vapors causing a fire .
- Always place a portable fuel container
on the ground before filling.
- Always keep the fi ller nozzle comp lete­
ly inside the portable container before
and during filling.
- If filling a portable container made of
metal, the filler nozz le must always be
in contact with the container. Th is w ill
help prevent static electricity from dis­
charging and cause a fire .
- Never sp ill fuel inside the vehicle or
luggage compartment. Fuel vapors are
h ighly flammable .
- Always observe local and state/provin­
cial laws regarding the use, storage
and transportation of fuel containers .
- Make certain the fuel container meets
industry standards (ANSI/ ASTM
F852 -86) .
(D Note
If any fuel has spilled onto the car, it
should be removed immediately to prevent
damage to the paint.
~ For the sake of the environment
As soon as the correctly operated nozzle sw itches off automatically for the first
time, the tank is full. Do not try to add more fue l because fuel may spill out . In
add it ion, the expans ion space in the fuel
tank will be fi lled -causing the fuel to
overflow when it becomes warm and pol­
lute the environment.
Fu el su ppl y and filling your fuel ta nk 231
@ Tips
- Running your engine while refue lling
may cause vapors to escape or even
cause fuel to spill out of the tank. This
would then shut off the fuel nozzle be­
fore the tank is full.
- Do not refuel your vehicle with the igni­
tion switched on. The fuel gauge may
otherwise not ind icate the correct fuel
level after refuell ing .
- The fuel filler flap of your vehicle is not
locked when you lock the vehicle from
the inside.
Fuel filler flap emergency release
You can open the fuel filler flap by hand if the
power locking system should fail .
Fig. 192 Rig ht s ide tr im panel in t he luggage compart­
ment : emerge ncy re lease mechanis m
The emergency release mechanism is located
behind the right side trim panel in the lug ­
gage compartment .
.,. Loosen the loop
o fig. 192 from the retain­
er and then pull on the loop carefully
o (D.
.,. Press on the left side of the fuel filler door
to open
o page 230, fig . 190 .
(J) Note
Only pull on the loop until you feel resist­
ance . You w ill not hear it release . Other­
wise you could damage the emergency re­
lease mechanism.

232 Checking and filling
Checking and filling Engine hood
Releasing the engine hood
The engine hood is released from inside the
vehicle .
Fig. 193 Driver foo twell: release lever
AUD I
Fig. 194 Rocker switch un der the hood
Make sure the wiper arms are not raised up
from the windshield. Otherwise the paint
could be damaged .
.,. Pull the lever under the instrument panel in
the direction of the arrow
~ fig. 193.
.,. Raise the hood slightly~,&. .
... Press the rocker switch under the hood up­
ward
~ fig. 194. This releases th e catch.
... Open the hood.
&_ 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 compartment . Wait until no steam or
coolant can be seen or heard before care­
fully opening the hood .
' Working in the engine compartment
Be especially careful whenever you work in
the engine compartment.
Whenever you must perform any work in the
engine compartment, for example checking
and filling different fluids, there is a risk of injury, burns and accidents. To prevent per­
sonal injury always observe the following
WARNINGS. The engine compartment of any
vehicle is a hazardous area
~ ,&. .
A WARNING
To help avoid injury, before you check any­
thing under the hood:
- Turn off the engine.
- Switch off the ignition .
- Apply the parking brake.
- Move selector lever to "P" (Park) .
- Always let the engine cool down. Hot
components will burn skin on contact.
- To reduce the risk of being burned, never
open the hood if you see or hear steam
or coolant escaping from the engine
compartment. Wait until no steam or
coolant can be seen or heard before care­
fully opening the hood.
- Keep children away from the engine com­
partment.
- Never spill fluids on hot engine compo­
nents . They can cause a fire .
- Never touch the radiator fan. The auxili­
ary electric fan is temperature controlled
and can switch on suddenly .
- Never open the coolant reservoir cap
when the engine is still warm . The cool­
ant system is pressurized and hot cool­
ant could spray out.
- Protect your face, hands and arm from
steam or hot engine coolant by placing a
thick rag over the cap when you open the
coolant reservoir.
- Do not remove the engine cover under
any circumstances. This increases the
risk of burns.
- If work on the fuel system or the electri­
cal system is necessary:

250 Tire s and wheel s
-Never mount used tires on yo ur vehicle if
you are not sure of their "previous histo­
ry." Old used tires may have been dam­
aged even though the damage cannot be
seen that can lead to sudden t ire failure
and loss of vehicle control.
- If you notice unusual vibration or if the
vehicle pulls to one side when driving, al­
ways stop as soon as it is safe to do so
and check the wheels and tires for dam­
age.
(D Note
Please note that summer and wi nte r tires
are designed for the cond itions that are
Glossary of tire and loading terminology
Accessory weight
means t he comb ined we ight (in excess of
those sta ndard items which may be rep laced)
of au toma tic tra nsmission, power steer ing,
power brakes, power windows, power seats,
radio, and heater, to the extent that th ese
items are availab le as factory -installed equip­
ment (whether installed or not) .
Aspect ratio
means t he ratio of the he ight to the w idth of
the tire in percent . Numbers of 55 or lower in ­
dicate a low sidewall for improved steering re­
sponse and better overall handling on dry pavement .
Bead
means the part of the ti re that is made of
steel wires, wrapped or reinforced by ply cords
and that is shaped to fit the rim.
Bead separation
means a b reakdown of the bond between
components in the bead.
Cord
means the strands forming the plies in the
tire . typ
ica l in those seasons . Aud i recommends
using winter tires during the winter
months . Low temperatures signif icant ly
decrease the e lasticity of summer tires,
which affects tract ion and brak ing ability.
If summer tires are used in very co ld tem­
peratures, cracks ca n form on the tread
bars, res ulting in permanent tire damage
that can cause loud driving no ise and un­
balan ced t ires. Audi is not responsible for
th is type of damage .
Cold tire inflation pressure
means the tire p ressu re recommended by t he
vehicle manufacturer fo r a tire of a des igna ted
s iz e that has not bee n driven for more than a
coup le of miles (k ilometers) at low speeds in
t h e three hour period before the tire pressure
is measured or adjusted.
Curb weight
mea ns the we ight of a motor ve hicle with
standard equipment in cl uding the max imum
capacity of fuel, oil, and coolant, air condi ­
tioning and additional weight of optiona l
equipment.
Extra load tire
me ans a t ire design to operate at higher loads
and at h igher inflation pressures than the cor­
responding standard tire . Extra load tires may
be identified as "XL", "x l" , "EXTRA LOAD", or
"RF" on the sidewall.
Gross A xle Weight Rating ("GAWR ")
means the lo ad -c a rry ing c apac ity of a s ingle
axle system , measured a t the tire-ground in­
terfaces.
Gross Vehicle Weight Rating ("GVWR ")
mea ns the maximum total loaded we ight of
t h e ve hicl e. .,.