engine AUDI S4 CABRIOLET 2009 Repair Manual

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

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New brake pads
Remember that new brake pads do not have a full braking
effec t during the first 250 miles (400 kilometers) after they
are installed .
New brake pads have to be "burn ished in" before they have optimal
grab =>& .
During the break -in period, you shou ld avoid putting severe loads
on the brakes . Severe loads include, for examp le, sudden hard
braking, in particular at very high speeds or, for example, on moun ­
tain passes.
& WARNING
Ne w brake p ad s don't h ave the bes t sto pp in g po we r and mu st b e
"brok en-in " durin g the initial 100 to 1 50 m il es ( 150 to 200 kil ome ­
t e rs) of norm al cit y dri ving . Y o u can com pensat e for thi s by
p re ss ing the br ake p ed al more firm ly. Th is also appli es later w he n
n ew pad s a re in sta lled.
:J
Catalytic converter
It is very important that your emission control system
(catalytic converter) is functioning properly to ensure that
y o ur vehicle is running in an environmentally sound
manner.
- Always use lead-free gasoline=> page 244, "Fuel supply".
- Never run the tank down a ll the way to empty.
- Never put too much motor o il in your engine =>
page 255,
"Adding eng ine oi l 'l:::r.11
•
- Neve r try to push -or tow -s ta rt yo ur vehic le.
The catalytic converter is an efficient "clean-up" device built into the
exhaust system of the vehicle. The catalytic converter burns many
of the po llutants in the exhaust gas before they are released into the
atmosphere.
The exc lusive use of unleaded fue l is critica lly important for the l ife
of the cata lytic converter and proper functioning of the engine.
& WARNING
• Do not p ark or op erate th e veh icle in are as w here the h ot
ex hau st sys tem m ay come in co ntac t w ith dr y gr ass, brush , fuel
s pill or other mater ial which can cau se a fire .
• Do not apply a dditi ona l u nder coating or ru stpr oofing on or
n ea r the exhau st m anifold , exhau st pipe s, ca ta lytic conv ert er or
h eat shie ld s. Dur in g d riving , the sub sta nce use d fo r und ercoa ting
coul d ove rhea t and cause a fire .
0 Note
• Be aware that just one tank filling with leaded fue l wi ll already
seriously degrade the performance of the catalytic converter.
• Do not exceed the correct engine oi l level =>
page 255.
• Do not drive until the fuel tank becomes comp letely empty . The
engine cou ld misfire. Unburned fuel could also get into the exhaust
system and this could cause the catalytic conver ter to overheat .
• Do not turn off the ignition while the vehicle is moving.
• Do not con tinue to operate your vehicle under these conditions,
as otherwise fuel can reach the cata lytic converter . This cou ld result
in overheating of the converter, requiring its rep lacement .
• To assure eff icient operation of the Em ission Control System:
- Have your vehicle maintained properly and in accordance with
the service recommendations in your Warranty
& Maintenance
booklet. •

- 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

-Dri
ving and environm ent --=---------------
one half . Never drive faster than the posted speed limit and weather
conditions permit .•
Reducing unnecessary idling
Even when your car is just idling it burns up fuel.
- Shut the eng ine off when you are not driving the vehicle.
- Do not warm up the vehicle by letting the engine run at
idle.
It makes sense to shut off the engine in traffic jams, when waiting
for trains to pass at rai lroad crossings, or at traffic lights that have
long waits on red. Turning the engine off for just 30 -40 seconds
saves more fuel than is burned s tarting the engine again .
It takes a long time for the engine to warm up fully when it is
running at idle. However, wear and noxious emissions are especially
high when the engine is warming up. So you should drive away as
soon as you star t the engine and avoid running at high rpms while
the engine is still warming up.
0 Note
Do not leave engine idling unattended after starting . If warning
lights should come on to indicate improper operation, they would
go unheeded. Extended id ling also produces heat, which could
resu lt in overheating or other damage to the veh icle or other
property .•
Regu1ar maintenance
A badly tuned engine unnecessarily wastes a lo t of fuel.
- Have your ve hicle serviced at regular intervals . By having your vehicle regularly serviced by an Audi dealer helps to
ensure that it runs properly and economical
ly . The condit ion of yo ur
vehic le not only affects its safety and abi lity to hold its va lue, it also
affects
fuel consumpt ion .
C heck your oil each time you fill your tank .
The amount of oil used is related to engine load and speed.
I t is norma l for the oil consumption of a new engine to reach its
lowest va lue after a certain mi leage has been driven.
You must drive your vehicle about 3,000 miles (5,000 kilometers) be fore you can properly assess oil consumption .
This also applies to fuel consumption and engine output .
0 Note
• Have your vehicle maintained properly and in accordance with
the service recommendations in your Warranty
& Maintenance
booklet. Lack of proper maintenance as well as improper use of the
vehic le wi ll impai r the function of the em ission control system and
cou ld lead to damage.
• Do no t alter or re move any component of the Emiss ion Contro l
System unless approved by the manufacturer.
• Do not alte r or remove any device, such as heat shields,
switches, ignition wires, valves, which are designed to protect your
vehic le's Emission Control System and other important veh icle
components. •
Fewer short trips
Fu el consumption will alw ays be rela tively high o n short
trips.
- Try to avo id d riving short dista nces wi th a cold engine. _,

The engine and catalytic converter have to reach their optimal oper­
ating temper ature
to reduce fuel consumption and noxious emis ­
sions effective ly.
Just after starting, a cold engine in a mid -size car only achieves a
fue l economy of 6-8 miles per gallon (30-40 1/100k m). After about a
half a mile, fuel economy climbs to 12 mpg (201/100 kml. After about
2.5 miles (4 km), the engine is at its proper operating temperature
and fuel economy has reached a normal level. So you can see that
you should avo id short tr ips whenever possib le .
The
outs ide temperat ure is also critical in this regard. Your car
consumes more fuel in the winter than in the summer. •
Controls and equip­
ment Safety first Vehicle operation
Driving
and environm ent
Vehicle care Do-it-yourself service Technical data

___ T_ r _a_ il_e _r_ t_ o_ vv_ in__... g,_ __________________________________________________ _
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.
~

-Tr
aile r t owing ---=--------------
W eig ht dis tri buti on
Towing a loaded trailer with an empty car resu lts in a high ly
unstable distribution of weight . If this cannot be avoided drive at
ve ry low speeds only to avoid the risk of los ing steering control.
A "ba lanced" rig is easier to operate and control. This means that
the tow vehicle should be loaded to the extent possible and permis ­
sib le whi le keeping the trailer as light as possib le under the circum ­
stances. Whenever possible, transfer some cargo to the luggage
compartment of the tow vehicle while observing tongue load
requirements and vehicle loading considerations .
Speed
The higher the speed, the more difficult it becomes for the driver to
contro l the rig . Do not drive at the maximum permissible speed.
Reduce your speed even more under unfavorable load, weather or
wind condi tions -particularly when going downhill.
Reduce vehicle speed
imm ed iately if the trailer shows the slightest
sign of swaying.
Do not try to stop the s waying by a ccelerating .
Observe speed limits. In some areas speeds for vehic les towing
trai lers are lower than for regular vehicles.
Always app ly brakes early. When driving downhill, shift into lower
gear to use the engine braking effect to slow down the vehicle. Use
of the brakes alone can cause them to overheat and fail.
C oo lan t tem pe ra ture
The coolant temperature gauge~ page 73 must be observed care ­
fully. If the needle moves close to the upper end of the scale, reduce
speed immediately and/or switch off the air conditioner.
If the coolant temperature warning light in the instrument cluster
starts flashing -~- , pul l off the road, stop and let the engine
idle for
about two minutes to prevent heat build -up .
& WARNING
An yone not prop erl y r estr ained in a mo ving ve hic le is at a much
gre ater ri sk in an accident. N ever let an yone rid e in your car who
is not p roperl y wearing the r estraint s pro vid ed by Audi.
c
Trailer towing tips
Important to know
Your vehicle handles differently when towing a trai ler because of
the additional weight and weight distribution . Safety, performance
and economy will great ly depend on how carefu lly you load your
trai ler and operate your rig.
Before you actually tow your trailer, practice turn ing, stopping and
backing up in an area away from traffic. Keep practicing unti l you
have comp letely become familiar with the way your vehicle -trailer
combination behaves and responds .
Backing up is difficu lt and requires practice. Backing up with a
trailer genera lly requires s teering action opposite of that when
backing up your vehic le without a trailer.
Maintain a greater distance between you r vehicle and the one in
front of you. You will need more room to stop.
To compensate for the trailer, you wi ll need a larger than normal
turning radius .
When passing, remember that you cannot accelerate as fast as you nor mally wou ld because of the added load . Make sure yo u have
enough room to pass. After passing, allow plenty of room for your
trai ler before changing lanes again .
Avo id jerky starts, sharp turns o r rapid lane changes.

-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.

___ C_ le_ a _ n_i_n ~g _ a_ n_ d __ p_r _o _t _e _c_ t_ i_o _n ___________________________________________ _
Safety belts
Only well-maintained safety belts work reliably when
needed.
Heavily soiled safety belts may not retract properly.
- Keep belts clean.
- For cleaning, use a mild soap and water solution. Let
belts dry thoroughly and away from direct sunlight.
- Do not allow inertia reel safety belts to retract before
they are completely dry.
- Check the condit ion of your safety belts
regularly.
& WARNING
Damaged safety belts can break in a crash .
• Anything that might damage your safety belts could mean that
you and your passengers would not be adequately protected in an
accident.
• Safety belt performance depends on correct installation. Never
remove belts from the vehicle to clean them.
• Do not use chemical cleaning agents, bleach or dyes. They have
corrosive properties which weaken the webbing.
• When cleaning your safety belts, inspect them for damage. If
you discover damage, see your Audi dealer.
• Always read and heed all WARNINGS and the information
=:> page 230. •
Engine compartment
Be especially careful when cleaning the engine compart­
ment.
Always switch off the ignition before cleaning the engine :::::, &.
Plenum panel
Remove leaves from the plenum panel in front of the windshield
under the engine hood. This prevents the water drain holes from
becoming blocked, and it prevents debris from entering the vehicle
interior through the heating and ventilation ducts.
Corrosion protection
The engine compartment and transmission have been corrosion­
protected at the factory.
Good anti-corrosion treatment is very important, particularly in the
winter. If the vehicle is frequently driven on salt treated roads, the
entire engine compartment and plenum panel should be thor­
oughly cleaned at the end of winter and retreated to prevent salt
damage. At the same time, the underside of the vehicle should be
washed as well.
I f the engine compartment is cleaned at any time with grease
removing solutions
21 , or if you have the engine washed, the anti­
corrosion treatment is almost always removed as well. It is therefore
essential to have a long-lasting corrosion protection reapplied to all
surfaces, seams, joints and components in the engine compart ­
ment.
& WARNING
Be aware: The engine compartment of any motor vehicle is a
potentially hazardous area.
• Before working in the engine compartment, be sure to read the
information :::::,
page 242. .,.,
21 Use only the correct cleaning solutions. Never use gasoline or diesel fuel.

_____________________________________________ C_ l_ e _a_ n_ in_ g_a _ n_d_ p_ r_ o_ t _e_ c_t _io _ n __ _
•
& WARNING (continued)
• Before reaching into the front plenum panel, always remove the
ignition key. Otherwise, the windshield wiper system could unin ­
tentionally be switched on, possibly causing personal injury from
the moving wiper linkage.
• Never reach into the area around or touch the radiator fan. The
auxiliary fan is temperature controlled and can switch on suddenly
- even when the ignition is off .
• Do not wash, wax or dry the engine with the engine running .
Moving or hot parts could injure you.
• 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. •
Vehic le care