oil pressure AUDI S8 2008 Owners Manual

If a component is malfunctioning or if the need for an urgent repair
has been detected, this will appear in the instrument clus ter display .
You will a lso hear an audible warning tone . The displays are co lor
coded in either red or yellow depending on their level of priority.
A red symbol means
D anger , a yellow symbo l ind icates W arning . In
certain situations, information message for the driver appear in
addit ion to the red and yellow symbo ls .
Fun ction t est: au tom atic transmission
The Auto-Check Contro l will automat ically perform a test each time
you switch on the ignition. With the selector lever in
P or N , the
f ollowing message appears in the display:
When stati onar y appl y fo ot brake while selecting gea r.
When you a select a different gear (for example : R, D , etc.l, the
message will disappear and the Auto -Check function is disp layed.
If there is a malfunction , then the malfunction message will appear
about 15 seconds after the you start the vehicle . At the same time
you will hear a warning tone .•
Driver information messages
Driver i nfo rmation messages are shown in the instrument
cluster display in addition to the red and yellow symbols.
Controls and equip­ ment
Fig. 16 CHEC K button
in th e instru ment
c lu ster
Driv er information di splay
For example, if the transmission selector lever is not in the P posi­
ti on when the engine is turned off, the following message appears:
Shift t o P, otherwi se ve hic le can roll away. Doors do not lo ck if
le ver i s not in P .
The igni tion key can only be removed with the selector in this pos i­
tion. This and other messages are brought up if a function cannot
be car ried ou t.
Dri ver messa ges and r ed symbols
If a red symbo l appears in the display, a driver message can be
shown by pressing the [ CH ECK] button.
For example, the symbol f or a problem with engine oi l
pressure~
appears in the disp lay . If you then press the [ CHECK] button , the
fo llowing driver message appears in the d isp lay:
S witch off engine and che ck oil level
The driver message in the display goes out after about 5 seconds .
The dr iver message can be d isplayed aga in by briefly pressing the
[ CHECK] button .
Driver me ssages and yellow symbols
If a yellow symbol appears in the display, a driver message is also
displayed automat ica lly .
For examp le, the symbol
G> appears in the disp lay, indicating low
windshield washer fluid level. The following message also appears :
Please top up wa sher fluid
The driver message disappears after a few seconds . The driver
message can be d isplayed aga in by briefly pressing the [ CHECK]
button. •

Driver information display
-Pull off the road.
-Stop the vehicle.
-Turn off the engine .
-Check coolant level ~ page 315.
-Add coolant if necessary~ page 316.
-Continue dr iv ing only after the eng ine coolant
warning/indicator light goes out.
-Contact your authorized Audi dealer for assistance if
necessary .
If the engine coolant le ve l is correct, then the radiato r fan may be
the cause of the malfunction.
I f the generator warning/indicator light should also illuminate
~ page 18, then the fan belt may be damaged.
& WARNING
• If your vehicle should break down for mechanical or other
reasons, park at a safe distance from moving traffic, turn off the
engine and turn on the hazard warning lights
~ page 73, "Emer­
gency flasher
A".
• Never open the hood if you see or hear steam or coolant
escaping from the engine compartment
-you risk being scalded.
Wait until you can no longer see or hear steam or coolant
escaping.
• The engine compartment of any vehicle is a dangerous area.
Before you perform any work in the engine compartment, turn of
the engine and allow it to cool. Follow the warning stickers
~ page 299, "Engine compartment".
0 Note
Do not continue driving if the-~-symbol illuminates. There is a
malfunction in the engine cooling sys tem -you could damage your
engine. •
Engine oil pressure malfunction ~
The red engine oil pressure warning symbol requires
immediate service or repair. Driving with a low -oil -pres ­
sure indication is likely to inflict severe damage to the engine.
If the ~ symbol appears in the display and blinks, the oil
pressure is too low. An additional driver message can also
be displayed by pressing the !CHECK] button:
Switch off engine and check oil level
Immediate actions
-Pull off the road.
-Stop the vehicle.
-Turn off the engine.
-Check the engine oil level with the dipstick ~ page 311.
Dipstick readings checks too low
-Top off oil to the proper level~ page 312.
-Make sure that the oil pressure warning symbol ~
appears no longer in the display before you start driving
again. ~

Dipstick reading checks OK
-If the oil pressure warning symbol "e::7: starts flashing
again even though the engine oil level checks OK on the
dipstick,
do not continue driving and do not let the
engine run in idle.
Instead, contact your authorized Audi
dealer for assistance.
[ i] Tips
• The engine oil pressure symbol ~ is not an indicator for a low
engine oil level. Do not rely on it . Instead, check the oil level in your
engine at regular intervals, preferably each time you refuel, and
always before going on a long trip.
• The yellow oil level warning indication
~ requires oil refill or
workshop service without delay. Do not wait until the red oil pres­
sure warning
~ starts to flash before you respond to the low oil
level warning
~- -By then, your engine may already have suffered
serious damage. •
Steering malfunction i
If there is a malfunction in the electronic steering column
lock, the steering cannot be unlocked.
If the ~ symbol in the display blinks, there is a malfunction
in the electronic steering column lock. An additional driver
message can also be displayed by pressing the [ CHECK]
button :
Do not drive vehicle: Steering defective
-Contact your nearest authorized repair facility.
- Do
not tow your vehicle.
Controls and equip­
ment • I I • • I
Driver information display
& WARNING
Your vehicle must not be towed in the event of a malfunction in the
electronic steering column lock because it cannot be steered due
to the locked steering. If it is towed with the steering locked, there
is the risk of an accident. •
Ignition lock malfunction ~
A malfunction in the ignition lock must be repaired imme­
diately.
If the ~ symbol in the display blinks, there is a malfunction
in the electronic ignition lock. An additional driver message
can also be displayed by pressing the [ CHECK] button:
Ignition lock defective. Contact workshop !
-Do not turn the engine off.
- Drive immediately to an authorized Audi dealer to have
the malfunct ion corrected.
If there is a malfunction in the electronic ignition lock, the ignition
cannot be turned off. Drive immediately to an authorized Audi
dealer to have the cause of the malfunction corrected.
I f your vehicle has an Advanced Key *, then you should not use the
I STOPI button to shut off the engine. You will not be able to start the
engine again once the ignition is switched off. •

Driver inf orma tio n displ ay
Yellow symbols
A yellow symbol means WARNING.
Fig . 18 Display: low
fu el l eve l warn in g
(pr iori ty 2)
Yellow symbols indicate a priority 2 malfunction - Warning!
When a yellow warning symbol appears,
one warning tone sounds.
A driver message appears as well to explain the malfunction in more detail . The driver warning goes out after about 5 seconds, but it can
be brought up again at any time by pressing the [ CHECK
I button.
Check the displayed function as soon as possible . If
more than one
priority 2 malfunction is detected, all symbols will appear one after
the other for about 2 seconds .
Yellow symbols mean:
Worn brake pads
Electromechanical
parking brake
Check engine oi l level
=> page 311
= page 34
=> page 136
=> page 35
Engine oil sensor malfunction => page 35
Low fue l level => page 35
-
Windshield washer fluid = page35
level low ~
Battery voltage => page35
-
II Battery in remote control key = page48
Advanced Key* = page 133
Key not in vehicle
USA mod els: = page26
Defective brake light
Canad a m od els: => page26
Defective brake light
Defective light bulb
=> page26
Adaptive Light* defective => page36
-
Dynamic headlight range => page36
ll contro l defective
Defective light -/rain sensor
= page36
--Tire pressure monitoring sys-= page42
tern
II Loss of air pressure
Tire pressure monitoring sys -
= poge45
tern
System not available
•
Worn brake pads
l"J Br ake pad s !

___ O_ n_ t_h _e_ r_o _ a_ d ____________________________________________________ _
[ i J Tips
• If you release the ignition key in positions G) ,@ or G) , the key
automatically returns to pos ition @.
• If you open the driver 's door when the ignition is switched on , a
buzzer sounds and the message
Ignition is on appears in the instru ­
ment cluster display. Please switch the ignition off .•
Ignition key safety lock
The igni tio n key can only be re move d when the selector
lever is in the
"P" (P ark) posi tion.
After turning off the ignition , the igni tion key can only be removed
from the ignition lock when the selec tor lever is in the
"P" (Park)
position . Af ter you have removed the key , the selector lever is locked
and cannot be moved .•
Starting and stopping the engine
Starting the engine
The engine ca n only be st arted with y our or iginal A udi
key.
Fig . 14 5 Ignit ion key
po sitions
-St ep o n the brake.
- Move t he selector lever into P or
N => &, .
-Turn the ign ition key to position 0 => fig . 14 5 -do not
depress the gas pedal when start ing t he engine .
A cold engine may sound loud after it has be en started. This is due
to the hydrau lic valves building up oil pressure. This is normal and
is not a n eed fo r concern .
I f the engine does not start immediately, stop trying after 10
seconds and then try to restart the engine about 30 seconds later .
& WARNING
Never start or let the engine run in a confined or en clo sed are a.
Exhaust fumes from the engine contain carbon monoxide, a color ­
less and odorle ss gas . Carbon mono xide can be fatal if inhaled.
• Never leave the engine idling unattended. An unattended
vehicle with a running engine po ses a dange r of person al injury or
theft.
0 Note
• Avo id high e ngine speeds, fast accelerati on or heavy eng ine
loads while the engine is still cold. This could damage the engine.
• The eng ine ca nnot be s tarted by push ing or towi ng the ve hicle.
To avoid unnecessary engine wear and to reduce exhaust emis ­
sions, do not let your vehic le stand and warm up. Be ready to drive
off im mediately afte r starting your vehicle . Maintain modera te
speed until the engine is completely warm . Remember , the engine
performs best at operating temperature. •

-
On the roa d
----------------
When starting a cold engine, the engine may be a bi t noisy for a
shor t w hile. This is because the hydraulic valves are working to
bring up the oil pressure . This is norma l and no cause for concern .
If the engine does not start immediately, stop cranking the engine
after 10 seconds . Wa it 30 seconds, t hen try to restart the eng ine.
& WARNING
Ne ver sta rt the engine in an en clo sed area su ch a s in your garage
with the garage door clo sed . The exhau st fumes are poi sonous!
0 Note
• Avoid high engine speeds, full gas or heavy engine loads if the
eng ine has not warmed up to its operating temperature . You cou ld
damage the engine.
• Do not try to start the engine by pu lling or pushing .
~ For the sake of the environment
Do not let your veh ic le stand and warm up . Be ready to drive off
right away. T his way, you prevent unnecessary exhaust emissions.
[ i ] Tip s
If you open th e driver 's door when the ignition is switched on , a
buzzer sounds and the message
Ignition i s on appears in the instru ­
ment cluster display. P lease switch the ign ition off .•
A pp lies to vehicles: w it h Ad vanced Key
Stopping the engine using the [S TO P] button
0
0
- Bring t he vehicle to a complete stop.
Fi g. 14 7 Advan ced
Ke y: S TOP button
-Mov e th e s elect or in to the P or N posi tion .
- Press the [STO P]
button => fig. 14 7.
Press ing the [ STOP) butto n once sw itches o ff the engi ne and the
ignition . If you press the [STOP] button again for approximately 2
seconds, the steeri ng wi ll be locked, provided that the selector lever
is in the P position
=> & .
Em ergen cy OFF fun ction
If necessary, the engine can be switched off with the selector lever
in the R, Dor S pos it io ns. To do so, step on the foot brake and press
and ho ld the [S T O P] button (vehic le speed must be be low 6 mph/
10 km/h).
& WARNING
• Never stop the engine until the vehi cle h as c ome to a complete
stop .
• The br ake boo ster and the servotroni c onl y w ork when the
engine is running . If you turn off the engine , more force will be

___________________________________________ C;:_:_: h..:e ..:c :..;.k..: i_n ..::g :.._ a_n _d_ f_il _li _n ..::g :.._--JIIIII
0 Note
• Before winter sets in, have the coolant checked to see if the
coolant additive in your vehicle is sufficient to meet the climate
conditions. This is especially important if you live in a region where
the winter is extremely cold. If necessary , increase the proportion of
coolant additive to 60%.
• When adding coolant additive to your cooling system,
remember:
-We recommend using only coolant additive G12+ + (check the
label) for your vehicle. This coolant additive is available at autho­
rized Audi dealers. Other types of antifreeze can significantly
reduce corrosion protection . The resulting corrosion can cause a
loss of coolant and serious engine damage .
• Do not add any type of radiator leak sealant to your vehicle's
engine coolant. Adding radiator repair fluid may adversely affect the
function and performance of your cooling system and could result
in damage not covered by your New Vehicle Limited Warranty .•
Checking the engine coolant level
The engine coolant level can be checked with a quick
glance.
Fig . 267 Engine
compartment : Coolant
expansion tank
Before you check anything in the engine compartment,
always read and heed all WARNINGS => & in "Working in
the engine compartment" on
page 307.
Turn off the ignition.
Read the engine coolant level from the coolant expan­
sion
tank => fig. 267 . With a cold engine, the coolant level
should be between the "min" and "max" markings. When
the engine is warm, the level may be slightly above the
"max" marking.
The location of the coolant expansion tank can be seen in the
engine compartment illustration =>
page 308.
To obtain an accurate reading, the engine must be switched off.
The expansion tank in your vehicle is equipped with an electric
coolant level sensor.
When the coolant level is too low, the warning light in the Auto­
Check
System => page 31 will blink until you add coolant and the
level has been restored to normal. Even though there is an electric
coolant level sensor, we still recommend you check the coolant level
from time to time.
Coolant loss
Coolant loss may indicate a leak in the cooling system. In the event
of coolant loss, the cooling system should be inspected immedi­
ately by your authorized Audi dealer . It is not enough merely to add
coolant .
In a
sealed system, losses can occur only if the boiling point of the
coolant is exceeded as a result of overheating.
& WARNING
The cooling system is under pressure and can get very hot. Reduce
the risk of scalding from hot coolant by following these steps.
.,_
Vehic le care I I Technical data

Tires and wheels -
----------------
•
& WARNING (continued)
crashes and serious personal injuries . Have worn or damaged tires
replaced immediately.
• Tires age even if they are not being used and can fail suddenly,
especially at high speeds. Tires that are more than 6 years old can
only be used in an emergency and then with special care and at
low speed.
Glossary of tire and loading terminology
Accessory weight
means the combined weight (in excess of those standard items
which may be replaced) of automatic transmission, power steering,
power brakes, power windows, power seats, radio, and heater, to
the extent that these items are available as factory-installed equip­
ment (whether installed or not).
Aspect ratio means the ratio of the height to the width of the tire in percent.
Numb ers of 55 or lower indicate a low sidewall for improved
steering response and better overall handling on dry pavement.
Bead
means the part of the tire that is made of steel wires, wrapped or
reinforced by ply cords and that is shaped to fit the rim.
Bead separation
means a breakdown of the bond between components in the bead.
Cord
means the strands forming the plies in the tire.
& WARNING (continued)
• Never mount used tires on your vehicle if you are not sure of
their
"previous history." Old used tires may have been damaged
even though the damage cannot be seen that can lead to sudden
tire failure and loss of vehicle control.
• If you notice unusual vibration or if the vehicle pulls to one side
when driving, always stop as soon as it is safe to do so and check
the wheels and tires for damage.
•
Cold tire inflation pressure
means the tire pressure recommended by the vehicle manufacturer
for a tire of a designated size that has not been driven for more than
a couple of miles (kilometers) at low speeds in the three hour period
before the tire pressure is measured or adjusted.
Curb weight
means the weight of a motor vehicle with standard equipment
including the maximum capacity of fuel, oil, and coolant, air condi­
tioning and additional weight of optional equipment.
Extra load tire
means a tire design to operate at higher loads and at higher infla ­
tion pressures than the corresponding standard tire. Extra load tires
may be identified as
"XL", "xi", "EXTRA LOAD", or "RF" on the side ­
wall.
Gross Axle Weight Rating
("GAWR")
means the load-carrying capacity of a single axle system, measured
at the tire -ground interfaces.
Gross Vehicle Weight Rating
( " GVWR")
means the maximum total loaded weight of the vehicle.
Vehicle care

Tires a nd wh eels -
----------------
•
0 Not e
Driving without valve stem caps can cause damage to the tire
valves. To prevent this, a lways make sure that factory instal led valve
stem caps on a ll whee ls are securely mounted on the va lve .
W Fo r the sake of the env ironm ent
Underinflated tires wil l a lso increase the fuel consumption. •
Tires and vehicle load limits
There are lim its to t he amount of load or weight that any ve hicle and
any tire can carry . A vehicle that is overload ed wil l not hand le well
and is more difficu lt to stop. Overload ing can not only lead to loss
of vehic le control , but can a lso damage important parts of the
vehic le and ca n lead to sudden t ire fa ilure, inc luding a blowout a nd
sudden deflation that can cause the vehic le to crash.
Your safety and that of your passengers also depends on making
sure that load l imits are not exceeded. Vehicle load includes every­
body and everything in and on the vehic le. These load limits are
technica lly referred to as the vehicle's
Gross Ve hicle We ig ht R ating
("GVWR").
The "GVWR" includes t he weight of the bas ic ve hicle, al l factory
insta lled accessories, a full tank of fuel , oil , coolant and other fluids
p lus maximum load . The maximum load i ncludes the number of
passengers that the vehicle is intended to carry ("seating capacity")
with an assumed weight of 150 lbs (68 kg) for each passenger at a
designated seating position and the total weight of any luggage in
the vehicle . If you tow a trailer, the weight of the trailer h itch and the
tongue we ight of the loaded trai ler must be included as part of the
vehic le load.
The
Gros s Axle We ight Rating ("GAWR") is the maximum load t hat
can be applied at each of the vehicle's two axles. The Gross Vehicle Weight Rating and the Gross Axle Weight Rating
are listed on the safety comp liance s ticker label loca ted either on
the driver's side B-pillar or on the inside of the fuel fil ler flap . Your
Audi has 5 seating positions, 2 in the front and 3 in the rear for total
seating capacity of 5. Vehicles with power individual rear seats*
have 4 seating positions, 2 in the front and 2 in the rear for total
seating capacity of 4. Eac h seating position has a safety be lt
~ page 209, "Safety be lts".
The fact that there is an upper limit to your veh icle's Gross Vehicle
Weight Rating means that the total weight of whatever is being
carried in the veh ic le ( including t he we ight of a trai ler hitch and the
tongue weight of the loaded trai ler) is limited . The more passengers
in the vehicle or passengers who are heavier than the standa rd
we ights assumed mean that less weight can be carried as luggage .
The tire pressure labe l on your Audi also lists the maximum
combined we ight of a ll of the occupants and luggage or other cargo
that th e vehicle can carry. For the location of the lab el
~ page 328 ,
fig. 272 .
& WARNING
Overloading a v ehicl e can cau se loss of vehicl e control , a cras h or
o ther ac cident , serious p ers on al injur y, and eve n de ath.
• C arrying more weight th an your vehi cle was designed to c arry
will prevent the vehicl e from handling prop erl y and in cre a se the
ri sk of the l oss of vehi cle control.
• The br akes on a vehi cle that has b een overload ed may not be
a bl e to sto p the vehi cle within a safe di sta nce.
• Tir es on a ve hic le th at ha s bee n ov erlo ad ed c an fail sudd enl y,
in clu din g a bl owout and sud den d efl atio n, ca usi ng loss of con trol
and a crash .
• Al ways m ake sur e th at the total lo ad being tr ansp orted -
includin g th e w eight of a tr ailer hitch and th e tong ue weight of a
load ed tr ailer -do es not m ake the vehi cle he avie r than the
vehicle 's Gro ss Vehicl e W eight R ating. •
Vehicle care

Tires and wheels 11111 --------------------------------------------
•
Wheel bolts
Wheel bolts must al wa ys be tightened to the correc t
tor que .
The design of wheel bo lts is matched to the factory installed rims. If
di fferent r ims a re fitted, t he co rrect w heel bo lts wi th the rig ht len gth
and correct ly shaped bolt heads m ust be used. This ensures that
w he els a re fitt ed se cu rel y and that t he bra ke syste m functi on s
correctly.
In certa in ci rc ums ta nces, yo u may no t use wheel bo lts fr om a
differ ent vehicle - eve n if it is the sa me
model=:> page 382.
& WARNING
Improperly tightened or maintained wheel bolts can become loose
causing loss of control, a collision and serious personal injury.
• Always keep the wheel bolts and the threads in the wheel hubs
clean so the wheel bolts can turn easily and be properly tightened .
• Never grease or oil the wheel bolts and the threads in the wheel
hubs. They can become loose while driving if greased or oiled,
even if tightened to the specified torque .
• Only use wheel bolts that belong to the rim being installed .
• Never use different wheels bolts on your vehicle.
• Always maintain the correct tightening torque for the wheel
bolts to reduce the risk of a wheel loss .
If the tightening torque of
the wheel bolts is too low, they can loosen and come out when the
vehicle is moving . If the tightening torque is too high, the wheel
bolts and threads can be damaged and the wheel can become
loose .
0 Note
The specified torque for the wheel bo lts is 9 0 ft lb (12 0 N m) with a
t olerance o f± 7,4 ft lb(± 10 Nm). T orque whee l bolts diago nally.
After changing a whee l, the torque must be checked as soon as possible with a torque wrench
-preferably by an authorized Audi
dea ler o r qua lif ied wo rksho p.•
Low aspect ratio tires
You r Aud i is fact ory- eq uip pe d w it h lo w aspect rati o tire s. T hese tir es
hav e been thorough ly t ested and been se lect ed specifical ly for your
mod el for thei r supe rb pe rf or manc e, r oad f eel an d ha nd ling under
a variety of driving conditions. As k your authorized Audi d ealer for
m or e de tails.
The low aspect rat io o f th ese t ires is indicat ed by a nume ra l of 55 or
less in the tire's size designatio n. The numeral represents the ratio
o f t he tir e's s idewa ll he ig ht in r ela ti on to it s tread w idt h ex pressed
in percentage . Conventiona l tires have a height/width ratio of 60 or
more.
The performan ce of low -aspe ct-ratio tires is particularly sensitive to
improper inflation pressure . It is therefore important that low
aspect ratio tires are inflated to the specified pressure and that the
inflation pressure is regularly checked and maintained . Tire pres­
sures should be checked at least once a month and alway s before a
long
trip :::::, page 331, "Checking tire pressure" .
What you can do to avoid tire and rim damage L ow a spect ratio tires can be damaged mo re easily by impact with
pot ho les, cu rbs, gull ies o r ridge s o n th e road, part icular ly if th e tire
is underinf lated .
I n or der to mini mize th e occurren ce of i mpac t da mag e to the tires
of your vehicle, we recommend that you observe the fol lowing
pr ecaut ions :
• Alwa ys m aint ain recom mended inflatio n pressu res . C he ck you r
t ire p res su re eve ry 2,000 mi les (3, 000 k m) and add ai r if neces sary .
• D rive carefully on roads with potho les, deep gullies or ridges .
The impac t from d riving th rough or ove r such o bstacles can
da mage you r tir es . Imp act with a curb may a lso caus e damage to
your tire s. .,_
Vehicle care