2008 AUDI S8 radiator

If the indicator goes all the way to the right side inside the coolant
temperature gauge, then the engine coolant temperature is too
high.
Pull off the road to safe location, turn off the engine and let it
cool down.
If the warning light comes on again after you have driven
a short distance, contact a qualified workshop.
& WARNING
• Always observe the warning in :::::, page 299, "Engine compart­
ment", before opening the hood and checking the engine coolant
level.
• Never open the engine hood if you see or hear steam, or if you
see engine coolant dripping from the engine compartment. You
could burn yourself. Let the engine cool off first so that you cannot
hear or see any steam or engine coolant.
0 Note
• Mounting additional lights or accessories in front of the air inlets
reduces the cooling effect of the radiator. At high outside tempera ­
tures or high engine load, the engine could overheat.
• The front spoiler has been designed to properly distribute the
cooling air when the vehicle is moving . If the spoiler is damaged,
this could reduce the cooling effect and the engine could then over­
heat. Ask your authorized Audi dealer for assistance. •
Tachometer (engine rev counter)
The tachometer indicates the engine RPM (revolutions per
minutes).
The tachometer 0:::::, page 12, fig. 2 is the left of the two large clock­
type displays.
The engine turns at a speed
1,000 times the single digit in the
display, e.g. if the needle is pointing at the "2" the engine is turning
at 2,000 RPM.
Controls and equip­ ment
Instruments and warning/indicator lights
If engine RPM drops below 1,500, you should downshift to the next
lower gear. The red area at the end of the scale indicates maximum
permissible engine RPM after the break-in period . Before reaching
this area, move the selector lever to position "D (Drive)" or ease your
foot off the accelerator pedal.
0 Note
The tachometer needle should not move into the red range . If it
does, then only for a very short period of time. You could damage
your engine by driving at high RPM.
<£> For the sake of the environment
Upshifting early saves fuel and reduces engine noise.•
Digital clock with date display
Date and time of day can be set in MM/.
Fig . 3 Instrument
cluster with digital
clock
The date, time of day, and time and date format can be set in MMI.
You can find out more in the MMI manual.
~

On the road -
-----------------'
Stopping the engine
-Turn the ignition key to position®~ page 130, fig. 145.
& WARNING
• Never turn off the engine until the vehicle has come to a
complete stop.
• The brake booster and servotronic only work when the engine
is running. With the ignition turned off, you have to apply more
force when steering or braking. Since you cannot steer and stop normally, this can lead to accidents and serious injuries .
• The radiator fan can continue to run for up to 10 minutes even
after you have turned off the engine and removed the ignition key.
The radiator fan can also turn on again if the engine coolant heats
up because of intense sunlight or heat build-up in the engine
compartment.
0 Note
Do not stop the engine immediately after hard or extended driving.
Keep the engine running for approximately two minutes to prevent
excessive heat build-up.•
Contro ls a nd eq uip­
ment
Starting and stopping the engine
using the Advanced Key
A pp lies to veh ic les: with Advanced Key
Starting the engine using the [ START] button
Using this button, you can switch on the ignition and start
the engine.
0
0
Fig . 146 Advanced
Key: START button
The [ START] button has a two position feature. ~ fig. 146.
Switching on the ignition
-Press the [START] button to the first position. Only the
ig nition switches on .
Starting the engine
-Depress the foot brake.
- Move the selector lever into the P or N position
~ &.
- Press the [ START] button to the second position. The
engine starts.
Vehicle care I I irechnical data

___ C_ le_ a_n _i_n ~g _ a_ n_ d
__ p_r _o _t _e _c_ t_ i_o _n ___________________________________________ _
essential to have a long -lasting corrosion protection reapplied to al l
su rfaces, sea ms, joi nts a nd compo nents i n th e eng in e c om pa rt ­
m ent .
& 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 299.
• 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 288 . •

___________________________________________ C=..:...: h:.:e :.: c:.: k.:.: i.:.: n :3:g ~ a:.:.n .:.: d::......:. f..:..:il ..:..:li .:.:n3g !._ _9I
•
Closing the engine hood
- Pull the hood down until the pressure from the struts is
reduced .
- Let the hood
drop down and latch in place. Do not try to
push it shut;
it may fail to engage =>& .
& WARNING
A hood that is not completely latched could fly up and block your
view while driving.
• When you close the engine hood, check it to make sure the
safety catch has properly engaged. The hood should be flush with
the surrounding vehicle body parts.
• If you notice while driving that the hood is not secured prop­
erly, stop at once and close it. •
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 personal injury always
observe the following WARNINGS. The engine compartment of any
vehicle is a hazardous area
~ & .
& WARNING
To help avoid injury, before you check anything under the hood :
• Turn off the engine. • Remove the ignition key.
• Apply the parking brake.
• I I • • I
& WARNING (continued)
• 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 compart­
ment. Wait until no steam or coolant can be seen or heard before
carefully opening the hood.
• Keep children away from the engine compartment .
• Never spill fluids on hot engine components. They can cause a
fire.
• Never touch the radiator fan. The auxiliary electric fan is
temperature controlled and can switch on suddenly.
• Never open the coolant reservoir cap when the engine is still
warm. The coolant system is pressurized and hot coolant 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.
• If work on the fuel system or the electrical system is necessary:
- Always disconnect the battery.
- Never smoke or work near heaters or open flames . Fluids in
the engine compartment could start a fire.
- Keep an approved fire extinguisher immediately available.
• To avoid electrical shock and personal injury while the engine
is running or being started, never touch:
-Ignition cables
- Other components of the high voltage electronic ignition system.
• If you must perform a check or repair with the engine running: -First, fully apply the parking brake, move selector lever to
"P"
(Park). .,_
Vehicle care

111'1...__C_ h_ e_c _k _ i_n ..::g ,_ a_n_ d_ f_il _li _n....: g=-- --------------------------------------------
& WAR N ING (continued )
-Always use extreme caution to prevent clothing , jewelry, or
long ha ir from getting caught in the radiator fan , V -belts o r
other moving parts , or from contacting hot parts . Tie back hair
before starting , and do not wear clothing that will hang or
droop into the engine .
• Minimize exposure to emis sion and chemi cal hazards
=> & .
& WARNING
Californ ia Proposition 65 W arning :
• Engine exhaust , some of its constituents , and certain vehicle
c omponents conta in or emit chemicals known to the State of Cali­
fornia to cause cancer and birth defects and reproductive harm. In addition , ce rtain fluids contained in vehi cles and certa in products
of component wear contain or emit chemicals known to the State
of California to cause cancer and birth defects or other reprodu c­
tive harm.
• Battery posts , terminals and related accessories contain lead
and lead compounds , chemicals known to the State of California
to cause cancer and reproductive harms. Wash hands after
handling.
0 Note
When adding f luids, always make sure that they are poured into the
proper container or filler opening, othe rwise serious damage to
vehicle systems wi ll occur.
For the sake of the environment
To detect leaks in time, inspect the vehicle floor pan from under ­
n eath regu larly. If you see spots from oil o r o ther ve hicle flu ids, have
your vehicle ins pected
by an autho rized Audi dea ler. •
Engine compartment
Ap plies to vehi cles : wi th 8 -cy lind er e ngi ne
Engine compartment overview : 8-cylinder
engine
T hese are the m ost i mpor tant i tems th at yo u c an ch eck .
Fig. 261 Typical l ayout for containe rs, engine o il d ip stic k a nd engine oil fille r
c a p
G) Winds hield/headlight washer containe r(~ ) ...... . .
© Brake fluid reservo ir ( ) ) . . .. .. .. ...... .... ... .. .
© En gine oi l filler cap ("t::r.) .. .. .... ...... ....... . _.
© Eng ine oil d ipstick (orange) .... ..... ....... ... .. .
© Power steering reservoir ...... ....... .... .. ... .. .
© Coolant expansion tank (_ L J ... ...... .... ... .... . .
323
317
312
3 11
2 7 3
315
..