lights AUDI S8 2009 Service Manual

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Important things to do before driving
Safety is everybody's job! Vehicle and occupant safety
always depends on the informed and careful driver.
For your safety and the safety of your passengers, before
driving always:
-Make sure that all lights and signals are operat ing
correctly.
- Make sure that the tire pressure is correct.
- Make sure that all windows are clean and afford good
visibility to the outside.
- Secure all luggage and other items carefully~
page 109.
-Make sure that noth ing can interfere w ith the pedals.
- Adjust front seat, head restraint and mirrors correctly for your height .
- Instruct passengers to adjust the head restraints
according to their height.
- Make sure to use the right ch ild restraint correctly to
protect children ~
page 245, "Child Safety ".
- Sit properly in your seat and make sure that your passen ­
gers do the same~
page 86, "General recommenda ­
tions".
- Fasten your safety belt and wear it p roperly. Also instruct
your passengers to fasten the ir safety belts properly
~ page 217. •
Controls and equip­
ment Safety first
Vehicle operation
What impairs driving safety?
Safe driving is directly related to the condition of the
vehicle, the driver as well as the driver's ability to concen­
trate on the road without being distracted.
The driver is responsible for the safety of the vehicle and all
of its occupants. If your ability to drive is impaired, safety
risks for everybody in the vehicle increase and you also
become a hazard to everyone else on the road ~& .There ­
fore:
Do not let yourself be distracted by passengers or by
using a cellular telephone .
NEVER drive when your driving ability is impaired (by
medications, alcohol, drugs, etc.).
- Observe all traffic laws, rules of the road and speed limits
and plain common sense .
- ALWAYS adjust your speed to road, traffic and weather
conditions.
- Take frequent breaks on long trips. Do not drive for more
than two hours at a stretch.
- Do NOT drive when you are tired, under pressure or when
you are stressed .
& WARNING
Impaired driving safety increases the risk of serious personal
injury and death whenever a vehicle is being used. •
Vehicle care Do-it-yourself service Technical data

-S
afe ty b elts ----=-----------------
- Make sure that your passengers also b uckle up and prop­
erly wea r th eir sa fety belts.
Protect children wit h a child restraint system appropriate
for the size and age.
The warning light i in the instrument cluster lights up when the
ignition is switched on as a reminder to fasten the safety belts. In
addition , you will hear a warning tone.
After the ignition is switched on, the warning light in the instrument cluster will a lways come on for about 6 seconds and if the driver has
not fastened the safety belt, a warning tone will also sound for
about 6 seconds . As soon as the driver has fastened the safety belt,
the warning tone will stop and the warning light will go out .
If the driver or front seat passenger have not buckled -up within
about 10 seconds after the warning tone has stopped and the
vehicle is moving faster than about 15 mph, the warning tone will
sound again for about 6 seconds and then stop for 24 seconds and
then repeat this reminder sequence for a maximum of 2 minutes. At
speeds be low 5 mph, the warning tone will not sound.
Fa sten your safe ty belt and m ake su re that your p assengers also
properl y put on th eir s afet y belts .
& WARNING
• Safety belt s are the single mo st effective mean s available to
reduce th e risk of ser ious injur y and death in a utomobile acci­
dent s. For your prote ction and th at of your pas senger s, alwa ys
c orre ctl y we ar safety belt s when t he vehicle is moving .
• Failure t o pay att ention to th e warning light that co me on,
c ould lead to per sonal injury .•
Why safety belts?
Frontal co11isions and the law of physics
Front al crashes create very strong forces for pe ople riding
in vehicles.
F ig. 222 U nbel ted
o cc up ants i n a ve hicle
he ading for a wa ll
Fi g. 223 T he vehicle
c ras hes in to t he wa ll
The physical principles are simple. Both the vehicle and the passen­
gers possess energy which varies with vehicle speed and body
we ight . Engineers cal l this energy "kinetic energy ."
T he higher the speed of the vehicle and the greater the vehic le's
we ight, the more energy that has to be "absorbed" in the crash .
Vehicle speed is the most significan t factor. If the speed doubles
from 15 to 30 mph (25 to 50 km/h), the energy increases 4 times! .,

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one half. Never drive faster than the posted speed limit and weather
conditions permit. •
Reducing unnecessary =citing
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 starting the engine again .
It takes a long time for the engine to warm up fu lly 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 start 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 idling also produces heat, which could result in overheating or other damage to the vehicle or other
property .•
Regu1ar ma1--.tenance
A badly tuned engine unnecessarily wastes a lot of fuel.
-Have your vehic le serviced at regular intervals .
By having your vehicle regularly serviced by an Audi dealer helps to
ensure that it runs properly and economically. The condition of your
vehic le not only affects its safety and abi lity to hold its value, it also
affects
fuel con sumpt ion.
C hec k your o il e ach time you fill your t ank.
The amount of oil used is related to engine load and speed.
It is norma l for the oil consumption of a new engine to reach its
lowest va lue after a certain mileage has been driven.
You must drive your vehicle about 3,000 miles (5,000 kilometers) before 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 ma intenance as well as improper use of the
vehic le wi ll impair the function of the emission control system and
cou ld lead to damage.
• Do not alter or remove any component of the Emission Control
System unless approved by the manufacturer.
• Do not alter or remove any device, such as heat shields,
switches, ignition wires, valves, which are designed to protect your
vehicle's Em ission Control System and other important vehicle
components .•
Fewer short tr ips
Fuel consumption will always be relatively high on short
trips.
- Try to avoid driving short dista nces wi th a cold engine. _,

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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
wi ll affect durability, economy and performance.
Trai ler towing not on ly p laces more stress on the vehicle, it a lso ca lls
for more concentration from the driver.
For this reason, always fol low the operating and driving instructions
provided and use common sense.
0 Note
If you are going to tow a trai ler, you must activate the trailer opera­
tion mode =>
page 192, "Towing a Trailer".
Technical requirements
Tra iler hitch
Use a weight-carrying hitch conforming to the gross trailer weight .
The hitch must be suitable for your vehicle and trailer and must be
mounted secure ly on the ve hicle's chass is at a
technically sound
location. Use only a trailer hitch with a removable ball mount.
Always check with the trai ler hitch manufacturer to make sure that
you are using the correct hitch .
Do not use a bump er hit ch.
The hitch must be installed in such a way tha t it does not interfere
with the impact-absorbing bumper system. No modifications should be made to the vehic le exhaust and brake systems. From time to time, check that all hitch mounting bolts remain securely
fastened.
When you are no
t towing a trailer, remove the traile r hitch ball
mount. This prevents the hitch from causing damage shou ld your
vehic le be struck from behind=>& .
Traile r br akes
If your trailer is equipped with a braking system, check to be sure
that it conforms to al l regu lations .
The trai ler hydraulic brake system must no t be direct ly connected to
the vehicle's hydraulic brake system.
S afet y c hains
Always use safety chains between your vehicle and the trailer.
Trailer light s
Trailer lights must meet all regulations. Be sure to check with your
Audi dealer for correc t wiring, swi tches and relays .
Mirrors
If you are unable to see the traf fic behind you using the regu lar
outside mirrors, then you
must install extended mirrors. It is impor­
tant that you
always have c lear vision to the rear.
& WARNING
After rem oving the tr aile r hitch , do not store it in your vehi cle. In
ca se of sudde n braking , the hit ch co uld fl y for ward and injure you
or your p asseng ers. a

Operating instructions
Max im um tra iler weight
A trailer for your vehicle is limited to a typical class 1 or class 2
trailer.
T ra ile r l oa d di stributio n
Be sure the load in the trailer is he ld securely in place to prevent it
from shifting forward, backward or sideways .
Never allo w a passe nger to r ide in a tr aile r~ & in "Driving instruc­
tions" .
Engin e c oolin g sys te m
Towing a trailer makes the eng ine work harder. It is important that
the cooling system's performance is up to the additiona l load. Make
sure that the coo ling system has enough fluid .
Tire pr ess ure
When towing a trailer, inflate the tires of your vehicle to the co ld tire
pressure listed under "Full load" on the labe l located either on the
driver's side B -pil lar (visible when the door is open) or inside the fuel
filler flap . Inflate trai ler tires to trai ler and tire manufacturers' spec­
ifications.
L ig ht s
The head light settings should be checked wit h the trai ler attached
before driving off. Check to make sure both vehicle and trai ler lights
are working properly .
Safe ty c ha in s
Be sure traile r safety chains are properly connected from the trailer
to the hitch on the vehicle. Leave enough slack in the chains to
perm it turning corners . When you i nsta ll safety chains, make sure
they will not drag on the road when you are driving.
T he chains should cross under the trailer tongue to prevent it from
dropping in case of separat ion from the hitch.
Controls and equip­
ment Safety first Vehicle operation
Tr
aile r t owing
0 Note
If you are going to tow a trai ler, you must activate the trailer opera­
tion mode ~
page 192, "Towing a Trailer". •
Driving instructions
Driving with a trailer always requires extra care and
consideration.
To obtain the best possible handling of veh icle and trailer,
please note t he following :
- Do not tow a loaded trailer when your car itself is not
loaded.
Be espec ia lly careful whe n passing other vehicles.
- Observe s peed limits .
Do not drive at the maximum permiss ible speed .
Always apply brakes ear ly.
Moni tor t he temperature ga uge.
Weight distr ibution
Towing a loaded trailer with an empty car results in a highly
unstable distr ibution of weight. If this cannot be avoided, drive at
very low speeds only to avoid the risk of losing steering control.
A "balanced" rig is easier to operate and control. This means that
the tow vehicle should be loaded to the extent possible and perm is ­
s ib le, while keeping the trailer as light as possib le under the circum ­
stances . Whenever possible, transfe r so me cargo to t he luggage
compartment of the tow vehicle whi le observing tongue load
requirements and vehicle loading considera tions . .,
Vehicle care Do-it-yourself service Technical data

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0 Note
• Never try to remove d irt, mud or dust if the surface of the vehicle
is dry . Never use a dry cloth or sponge, since this cou ld scratch your
vehic le's paint or w indows.
• Never wash your car in bright sunlight. Drops of water act as
magnify ing 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 c lean the head ligh ts. 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 on ly be
washed in specia l wash bays. •
Washing your vehicle with a power washer
Cleaning the exterior of your car with a high -p ressure
power washer is safe as l ong as y ou observe a few simple
rules .
-Before using the power washer, make s ure you have read
and understood the WAR NINGS=::;,
& in "General infor­
mati on" o n
page 290.
-Always follow the operating instructions for the power
washer. - Make sure that the jet o
n the spray hose pro duces a "fan
sha ped sp ray".
D o
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 particula rly to the
operating
pre ssure
and the spraying di stance . Maintain a sufficient distance
to soft materia ls such as rubber hoses and sound/vibration dead ­
ening materia ls (part icularly 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 °Cl.
& WARNING
Never wash tire s with a jet that sp ra ys water in a dir e ct stream .
Thi s could cau se invisible damage to the tire s and we ake n them ,
eve n if th e spra y is from a re lativel y lo ng dis tanc e an d f or a sh o rt
time . Damaged and weakened tire s can f ail and cau se ac cident s
a nd per sona l injur y.
0 Note
To avoid damaging your vehicle, always make sure that there is
suffic ient distance between the spray head and soft materia ls like
rubber hoses, plastic parts and sound -deadening materials . Never
aim the spray head at the same p oint for a long time . This also
applies to cleaning headlights and painted bumpers . Remember :
the c loser the nozzle is to the surface of the material, the greater the
stress on the mater ial. •