2009 AUDI S4 CABRIOLET tires

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• If the power steering system should fail entirely, or if the engine
is not running (for example, while being towed), you will still be able
to steer the vehicle . However, considerably more effort will be
required to do so.
• If the power steering system should have a leak, or is not func­
tioning properly, contact your authorized Audi dealer immediately.
• The power steering system requires a specially formulated
hydraulic fluid. The power steering reservoir is the one located most
forward on the left side of the engine compartment=> page 251. The
correct fluid level in the reservoir is important for proper func­
tioning of the power steering. •
Driving with your quattro®
With All Wheel Drive, all four wheels are driven.
General information
With All Wheel Drive, power is distributed to all four wheels. This
happens automatically depending on your driving style and the
road conditions at the time. See also=> page 213, "Electronic differ­
ential lock (EDU".
Winter tires
When driving in the winter, your vehicle with All Wheel Drive has an
advantage, even with regular tires. In winter road conditions it may
be advisable to mount winter tires (or all-season tires) for improved
driveability and braking: these tires must be mounted on
all four
wheels.
See also => page 284, "Winter tires".
Snow chains
Where snow chains are mandatory on certain roads, this normally
also applies to vehicles with all -wheel drive => page 285, "Snow
chains".
Replacing wheels/tires
Vehicles with All Wheel Drive must always have tires of the same
size. Also avoid tires with different tread depths. For details see
page => page 279, "New tires and replacing tires and wheels".
Off-Road driving?
Your Audi does not have enough ground clearance to be used as an
off-road vehicle. It is therefore best to avoid rough tracks and
uneven terrain as much as possible. Also refer to=> page 221.
& WARNING
Always adjust your driving to road and traffic conditions. Do not
let the extra safety afforded by the all-wheel drive tempt you into
taking extra risks.
• Although the quattro®all-wheel drive is very effective, always
remember that braking capacity is limited by tire traction. You
should therefore not drive at excessive speeds on icy or slippery
road surfaces.
• On wet road surfaces, be careful not to drive too fast because
the front wheels could begin to slide on top of the water (hydro­ planing). If this should occur, you will have no warning from a
sudden increase in engine speed as with a front-wheel drive
vehicle. Always drive at speeds which are adjusted to the road conditions -risk of crash! •

Driving and environment
The first 1 ,000 miles (1,500 km) and afterwards
New engine
The engine needs to be run-in during the first 1,000 miles
(1,500 km).
For th e fir st 600 mil es (1 ,000 kil omet ers):
Do not use full throttle.
- Do not drive faster than 3/4 of the top speed marked on
the speedometer.
- Avoid high engine speeds .
Fr om 600 to 1 ,000 mil es (1,000 to 1 ,500
kilom ete rs ):
- Speeds can gradually be increased to t he maximum
permiss ible road or engine speed .
During and aft er br eak-in p eri od
- Do not rev the engine up to high speeds when it is cold. This applies whether the transm ission is in N (Neutral) or
1n gear.
After the br eak -in period
- Do not exceed max imum e ngine speed unde r any
circumstances.
- Upshift into the next higher gear before reaching t he red
area at the end of the tachome ter scale ~ page 12 .
Controls and equip­
ment Safety first Vehicle operation
Driving
and environm ent
During the first few hours of driving, the eng ine's internal friction is
higher than later when all the moving parts have been broken in.
How well this break-in process is done depends to a cons iderable
extent on the way the vehicle is driven during the first 1,000 miles
(1,500 ki lometers).
0 Not e
Extremely high engine speeds are automatically reduced. However,
these RPM -limits were programmed for an engine we ll run-in , not a
new engine .
~ For the sake of the environment
Do not drive with unnecessarily high engine speeds -upshifting
early saves fuel , reduces noise and protects the environment.
New tires
If your v ehicle is r un ning on new tires, driv e particularly
carefu l for the first 350 miles (500 ki lometers) after fitting.
& WARNING
New tire s te nd to b e slipp ery and mu st al so be " brok en -in ". Be
su re t o reme mber thi s during th e fir st 350 m ile s (5 00 kil ome ters).
Br ake gent ly. A vo id following clo se ly behind oth er vehicle s or
ot her situ ati ons that might requi re su dd en , har d b raking.•
Vehicle care Do-it-yourself service Technical data

- Lack of proper maintenance as wel l as improper use of the
vehic le wi ll impair the function of the emission control system
and could lead to damage.
'£> For the sake of the environm ent
Even when the Emission Control System is operating properly, the
exhaust gas can have a su lfur -like exhaust gas sme ll under some
operating states. This depends on the sulfur content of the fuel
being used. Using a different brand of fue l may help, or filling the
tank with lead-free super grade gasoline. •
Avoid damaging the vehicle
When you are driving on poor roads, or over curbs, steep ramps,
etc., make certain that low- lying parts such as spoilers and exhaust
system parts do not bottom out and get damaged.
This is especially true for vehicles with low -slung chassis (sports
chassis)* and fully loaded vehicles.
a
Operate your vehicle economically
and minimize pollution
General
Your personal style of driving will determine the economy
of your vehicle, as well as exhaust and noise levels.
Fuel economy, environmental impact, and wear on your engine,
brakes and tires largely depend on three factors:
• your personal driving style
• operating cond itions
• technica l limitat ions
Controls and equip­
ment Safety first Vehicle operation
Driving
and environm ent
If you anticipate what you need to do next and drive economica lly,
you can easily cut your fuel consumpt ion by 10 -15 percent . This
section wil l give you some tips on how you can help the environ­
ment and your pocketbook.
[ i ] Tips
The consumption est imates as published by ENV IRONMENTAL
PROTECTION AGENCY (EPA) and Transport Canada may not corre ­
spond to your actua l consumption on the road, which will vary
depending upon vehicle load and speed, road and weather condi­
tions, trip length, etc. •
Drive smoothly and keep a lookout ahead
Vehicles use the most fuel when they ore accelerating .
-Avoid unnecessary accelerating and brak ing.
Vehicles use the most fue l when they are accelerating . If you antici­
pate what is going to happen next, you wi ll need to brake less and,
thus, acce lerate less. Let the vehicle coast whenever possib le - for
examp le when you see that the next traffic light is red. •
Avoid full throttle
Driving at moderate speeds saves fuel and improves your
mileage.
-Try and keep well below your car's maximum speed.
Acce lerating gently reduces fuel consumption, engine wear, and
does not disturb the environment.
Fue l consumption, exhaust emissions and engine noise increase
disproportionately at high speeds . If you drive at approximately
three quarters of top speed, fuel consumption wil l be reduced by •
Vehicle care Do-it-yourself service Technical data

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Trailer towing
Driving with a trailer
General information
Your Audi was designed primarily for passenger transpor­
tation.
If you plan to tow a trailer, please remember that the additional load
will affect durability, economy and performance.
Trailer towing not on ly p laces more stress on the vehicle, it a lso calls
for more concentration from the driver.
For this reasons, always fo llow the operating and driving instruc ­
tions provided and use common sense. •
Technical requirements
Trailer hitch
Use a weight -carrying hitch conforming to the gross trailer weight.
The hitch must be suitab le for your veh ic le and tra iler and must be
mounted securely on the vehicle's chass is at a technically sound
l ocation. Use only a trailer hitch with removable bal l mount. A lways
check with the trailer hitch manufacturer to make sure that you are
using the correct hitch .
Do not u se a bumper hit ch .
The hitch must be installed in such a way that it does not interfere
with the impact-absorbing bumper system . No modifications
should be made to the vehicle exhaust and brake systems . From
time to time, check that all hitch mount ing bo lts re main securely
fastened.
When you are not towing a trai ler, remove the trailer hitch ball
mount. This prevents the hitch from causing damage shou ld your
vehic le be struck from behind
=:, & .
Tire pre ssur e
When towing a trailer, inflate the tires of your vehic le to the cold tire
pressure listed under "Full load"on the s ticker on the right door ­
jamb . Inflate trai ler tires to trai ler and tire manufacturers' specifica ­
tions.
Lights
The head ligh t sett ings should be checked with the trai ler attached
before driving off. Have the head lights adjusted as necessary so
that you can see the road ahead but not blind oncoming traffic.
Check to make sure both vehicle and trailer lights are working prop ­
erly .
Engine cooling sy stem
Towing a trailer makes the engine work harder. It is important tha t
the cooling system's performance stands up to the additional
strain. Make sure that the coo ling sys tem has enough fluid .
Trailer brakes
If your traile r is equipped wi th a braking system, check to be sure
that it conforms to all regu lations .
The trailer hydraul ic brake system must not be direct ly connected to
the vehic le's hydraulic brake system .
Safety chains
Be sure trailer safety chains are properly connected from the trai ler
to the hitch on the vehicle. Leave enough slack in the chains to
permit turning corners. When you install safety chains, make sure
they will not drag on the road when you are driving.
The chains shou ld cross under the trailer tongue to prevent it from
dropping in case of separation from the hitch.
~

Trailer lights
Trailer lights must meet all regulations. Be sure to check with your autho rized Audi dealer for correct wiring , switches and relays .
Mirrors
If you are unable to see the traffic behind you using the regular
outside mirrors, then you
must install extended mirrors. It is impor ­
tant that you always have clear vision to the rear .
& WARNING
After removing the trailer hitch, do not store it in your vehicle. In
case of sudden braking, the hitch could fly forward and injure you
or your passengers .
.1
Operating instructions
Maximum trailer weight
A trailer for your vehicle is limited to a typical class 1 or class 2
trailer .
Trailer load distribution
Be sure the load in the trailer is held securely in place to guard
against shifting, be it forward, backward or sideways.
Never allow a passenger to ride in a trailer~&, in "Driving instruc­
tions".
Tire pressure
When towing a trailer, inflate the tires of your vehicle to the cold tire
pressure listed under "Full load" on the sticker on the right door­
jamb. Inflate trailer tires to trailer and tire manufacturers' specifica­
tions.
Controls and equip­ ment Safety first Vehicle operation
Trailer towing
Lights
The
headlight settings should be checked with the trailer attached
before driving off. Adjust as necessary so that you can see the road
ahead but not blind on -coming traffic.
Check proper working of vehicle and trailer lights .
Safety chains
Be sure trailer safety chains are properly connected from the trailer
to the hitch on the vehicle. Leave enough slack in the chains to
permit turning corners. When you install safety chains, make sure
they will not drag on the road when you are driving.
The chains should cross under the trailer tongue to prevent it from
dropping in case of separation from the hitch .•
Driving instructions
Driving with a trailer always requires extra care and
consideration.
To obtain the best possible handling of vehicle and trailer,
please note the following:
Do not tow a loaded trailer when your car itself is not
loaded.
- Be especially careful when passing other vehicles.
Observe speed limits.
Do not drive at the maximum permissible speed.
- Always apply brakes early.
Monitor the temperature gauge.
Vehicle care Do-it-yourself service Technical data

-Cleaning and protection P':ft':I _______________ _
& WARNING
• Do not clean the underside of the chassis, fenders, wheel
covers, or other hard to reach parts without protecting your hands
and arms. You may cut yourself on sharp-edged metal parts.
• Always read and heed all WARNINGS and other information
~ page 230.
0 Note
• Never try to remove dirt, mud or dust if the surface of the vehicle
is dry. Never use a dry cloth or sponge, since this could scratch your
vehicle's paint or windows.
• Never wash your car in bright sunlight. Drops of water act as
magnifying lenses and may damage your paint .
• When you wash your car in the winter: if you rinse your vehicle
with a hose, be careful not to aim the stream of water directly at
locks, or at door or hatch openings - they can freeze shut.
• Never use sponges designed to remove insects, or any kitchen
scouring sponges or similar products. They can damage your paint
finish .
• Never use a dry cloth or sponge to clean the headlights. Only use
wet cloths or sponges to prevent scratches . It is best to use soapy
water.
<£> For the sake of the environment
In the interest of the environment, the vehicle should only be
washed in special wash bays. •
Washing your vehicle with a power washer
Cleaning the exterior of your car with a high-pressure
power washer is safe as long as you observe a few simple
rules.
- Before using the power washer, make sure you have read
and understood the WARNINGS~
& in "General infor­
mation" on
page 230.
Always follow the operating instructions for the power
washer.
Make sure that the jet on the spray hose produces a "fan
shaped spray".
Do
not hold the spray nozzle too close to soft materials.
When cleaning the vehicle with a power washer always follow the
operating instructions. This applies particularly to the
operating
pressure and the spraying distance. Maintain a sufficient distance
to soft materials such as rubber hoses and sound/vibration dead­ ening materials {particularly on the underside of the engine hood).
Do not use a jet which sprays water in a
direct stream or one that
has a
rotating jet.
Water temperature should not exceed 140
°F (60 °C).
& WARNING
Never wash tires with a jet that sprays water in a direct stream.
This could cause invisible damage to the tires and weaken them,
even if the spray is from a relatively long distance and for a short
time . Damaged and weakened tires can fail and cause accidents
and personal injury.
0 Note
• Never use a power washer to clean the power top itself.

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Never dry windows with the same chamois that you use to dry
painted surfaces. Wa x resi due on the cha mois can impair vision
through the windows .
& WARNING
• The windshield must not be treated with water-repellent mate­
rials. They can increase glare under poor visibility conditions such
a s wetne ss, darkness , or when the sun is low o n the horizon . In
addition , they can cause the wind shield wipers to chatter .
• Always read and heed all WARNINGS and other informat ion
~ page 2 30.
0 Note
• Never use war m or hot wa ter to remove snow and ice from
windows and mirrors. Th is could cause the glass to crack.
• To prevent damage to the w ires of the rear defogger, do not p lace
any adhesive stic kers on the inside of the rear window over the
wires.
• To he lp prevent dirt from sc ratching the w indow, a lways scrape
in a forward direction -pushing t he scraper away from you -nev er
back and forth. •
Weatherstrips
Complete c ar ca re includes the wea the rs trips as well .
- App ly a s uitable rubber co ndit ioner to the weat herstr ips
f rom t ime to t ime.
To be able sea l properly, the weatherstrips around the hood, doors,
rear lid , etc. must remain pliable . Spray the weatherstrips with si li­
co ne or coat them w ith ta lcum powder or glycer ine to retain the
flexibility of the rubber and to protect them against free zing in the
winter .
& WARNING
Always read and heed all WARNINGS and the infor mation
~ page 2 30 .
[ i ] Tips
K eep si lico ne s prays off the windsh ield to avo id wiper smear in
rain .•
Ap plies to vehic les : w it h s teel whee ls te.g. if ref itt ed with winte r tiresl
Steel wheels
The wheels also have to be cle aned.
Always include the hub caps and wheel rims when
washing yo ur vehicle to remove roa d dirt, sal t sprays and
brake dust.
I f necessary, use a commercial wheel cleaner to remove accumu ­
la ted brake dust.
The wheel rims a re eas ier to kee p clean i f they are regular ly coated
with liquid wax .
Paint scratches sh ou ld be touc hed u p as so on as possible to p reven t
corrosion~
page 235, "Touch -up paint".
& WARNING
• Moisture and i ce on brakes may affect br aking efficiency -
~ page 215, "General information ". Test the brakes carefully after
ea ch vehicle wa sh .
• Alway s read and heed all WARNINGS and the information
~ page230. •

Tires a nd wh eels BIii ________________________________ :....:.:.....::.=.....::.:..:..:..::..:___:___:..__ __
•
Tires and wheels
Tires
General notes
Tires may be the least appreciated and most abused parts
of a motor vehicle.
Tires may be the least appreciated and most abused parts of a
motor vehicle. Tires are, however, one of the most important parts
of a vehicle, particular ly considering the comparative ly sma ll patch
of rubber on each tire that assures that all -important contact
between you, your vehicle and the road .
Maintaining the correct tire pressure, making sure that your vehicle
and its tires do not have to carry more weight than they can safely
handle, avoiding damage from road hazards and regular ly
inspecting tires for damage inc luding cuts , slashes irregular wear
and overal l condition are the most important things that you can do
to help avoid sudden tire failure including tread separation and
b lowouts .
Avo iding d am age
If you have to drive over a curb or similar obstacle, drive very slowly
and as close as possible at a right angle to the curb.
A lways keep chemica ls including grease, oil, gasoline and brake
flu id off the ti res .
I nspect the tires regularly for damage (cuts, cracks or blisters, etc .!.
Remove any foreign bodies embedded in the treads .
Storing tire s
Mark tires when you remove them to indicate the direction of rota ­
tion. This ensures you to be ab le to mount them correctly when you
reinstall them. When removed, the whee
ls or tires should be stored in a coo l, dry
and preferably dark place.
Store tires in a vertical position i f they are not mounted on r ims, in
a horizontal position if they are mounted on rims.
N ew tire s
New tires have to be broken in => &.
The tread depth of new tires may vary, according to the type and
make of tire and the tread pattern.
Hidd en d am ag e
Damage to tires and rims is often not readily visible . If you notice
unusua l vibration or the vehic le pul ls to one side, this may indicate
that one of the tires has been damaged . The tires must be checked
immediately by an author ized Audi dealer or qualified workshop .
Uni dir ection al tire s
A unidirect ional tire can be identified by arrows on the sidewa ll, that
point in the direction the tire is designed to rotate. You must fo llow
the specified direction of ro tation . This is necessary so that these
tires can deve lop their optimum characteristics regarding grip, road
noise, wear and hydroplaning resistance . For more information
=> page 298.
Rim s with bolted rim ring *
Light-alloy wheels with a bo lted rim ring consist of several parts .
These parts are screwed together with special bo lts, using a specific
technique. This ensures proper function, seal, safety, and true running of the wheel. For this reason, damaged rims shou ld be
replaced, and you should never repair or dismantle them
=> & .
Rim s with screw -on decorative co vers *
Light-a lloy whee ls can be furnished with interchangeab le decora -
tive covers that are mounted to the rim with se lf -locking bolts. ...
Vehic le care