overheating AUDI S8 2011 Owners Manual

22 Instruments and warning/indicator lights
~ Dynamic steering
t1r- J Steering: system fault. you can continue
driving
If the indicator light turns on and the mes­
sage appears, the steer ing may be more diffi­
cult to move or mo re sensitive than usual. The
steer ing wheel may also be at an angle when
driving straight.
Drive slow ly to your author ized Audi dealer or
qual ified workshop to have the malfunction
corrected.
t 1r J Dynamic steering: initialising
If this driver message appears and the ind ica­
tor light is flashing on the instrument panel,
dynamic steering is being reinitialized . Once
you start the engine after this is finished, the steering wheel w ill be easy to move . Re-in iti­
a lization m ight be necessary if the steering
wheel was moved hard to the left and r ight
while the vehicle was not moving. The display
goes out as soon as initialization is complete.
A WARNING
Have the dynamic steering system mal­
function repaired as soon as possible by an authorized Audi dealer or any qualified
workshop - risk of accident!
@ Tips
- The dynamic steering stability systems
are not available in the event of a system
malfunction.
- For additional information on dynamic
steering, refer to
c> page 106.
I- I Sport differential
l'I Sport differential: system fault
There is a malfunction with the sport differen ­
tial.
Drive to you r authorized Aud i dea ler immedi­
ate ly to have the malfunction corrected .
Ill Sport differential: overheating T
he transmission temperature has increased
significantly due to the sporty driving manner .
Drive in a less sporty manner until the tem­
perature returns to the normal range and the
indicator light switches of.
A WARNING Co....- -
Contact your authorized Audi dealer or a
qualified workshop if the sport differential
i s faulty or malfunct ioning. The repair
must be performed by trained personnel
using the correct oil in order to ensure
safety .
¢¢ Turn signal s
The indicator light blinks when you use either
turn signal.
Whenever you use the left ll or the right rl
turn s ignal, the indicato r light blinks . When
you use the emergency f lashers, both indica­
tor lights flash .
If one of the turn signal light bulbs burn out,
the turn signal will blink twice as fast as nor­
mal. Carefully drive to your authorized Aud i
dealer immed iate ly to have the malfunction
corrected. The indicator light does not indi­
cate a ma lfunction if a turn signal on the trai l­
er or on the vehicle fails in trai ler towing
mode.
(D Tips
For more information on the turn signals,
refer to
c> page 45.
CRUISE /C'J' Cruise control
The warning/indicator light
f;;(l)~i~ (USA mod­
els)/ . (Canada models) illuminates when
the cruise control is act ivated
c> page 84 .

64 Seat s a nd s tor ag e
Equipm ent that can be connected
Electrical devices can be connected to t he 115
volt socket in the vehicle. Power consumption
at the 115-volt socket must not exceed 150
watts (300 watts peak). Check the power con­
sumption of the equipment on the model
p late.
LED on th e sock et
- The socket is ready for use when the LED is
green .
- If the L ED blinks red , the re is a malfunction .
The socket will switch off automatically due
to overcurrent or overheating. The socket
wi ll switch on again automatically after a
cool-down period. Any devices that are con­
nected and switched on will activate again
automatically ¢,&. .
A WARNING
-The sockets and the electrical accessories
co nnected to them operate on ly when
the ignition is switched on . Incor rect us­
age can lead to serious injuries or burns.
T o reduce the risk o f injuries, never leave
children unattended in the vehicle with
the vehicle key.
- Heavy equipment or plugs with integrat­ ed power supply units can damage the
socket and lead to injuries.
- Store all connected equipment securely
whi le the vehicle is moving so that they
cannot be thrown through the vehicle in
the event of a braking maneuver or an acc ident.
- Never spill any liqu ids on the socket. If
any moisture gets into the socket, make
certain that all the moisture has dried up
before using the socket aga in .
- Equipment that is connected to the vehi­
cle socket can heat up more than it does
when connected to the public g rid.
- When using adapters and extension
cords, the ch ild safety for the 115-volt
socket is disabled and the socket is
live .
- Never insert anyth ing other than the
plug of a n appropriate elect rical accesso- ry into the socket, especially things that
conduct e lectr icity, e.g. meta l pens, kn it­
ting needles, etc. into the contacts of the 115-volt socket.
- Turn the electrical equ ipment off if the
socket has switched off because of
over­
heating .
(D Note
-Always follow the manufact urer's in­
struct ions for all electrical accessories
you want to use with the electrical sock­ et!
- Do not connect lamps that contain a ne­
on tube. For technical reasons the lamp
may be damaged.
- Do not connect any 230-volt equipment
to the 115-volt socket. The equipment may be damaged .
If necessary, check the
permissible voltage for the equipment
on the model labe l.
- In the case of some powe r packs, e .g . for
a laptop computer, the built-in ove rcur­
rent shutoff prevents i t from being
swi tched on be cause of excessive sta rt­
up c urrent. In this case, disconnect the
power pack from the consumer and re­
connect it after about 10 seconds .
(D Tips
- Unshielded equipment may cause inte r­
ference in the radio and the vehicle e lec­
tronics.
- Some equipment may wo rk properly be­
cause of the reduced power (wattage),
available from the socket.

84 On the road
Cruise control
Switching on
The cruise control system makes it possible to
drive at a constant speed starting at 20 mph
(30 km/h).
0
f
®t
0
Fig. 83 Control lever w it h set butt on
Fig . 84 D is pl ay: Selected speed
"' Pull the lever to position (D c::> fig. 83 to
switch the system on.
"' Drive at the speed you wish to set.
"'Press button@to set that speed .
I :i:. ... a,
The stored speed and the ind icator light
[ij;W~1~ (US models) / 0 (Canadian models) ap ­
pear in the instrument cluster display
c:;, fig. 84 . The display may vary, depending on
the type of display in your vehicle . The indic a­
tor light . in the instrument cluster also illu­
minates.
The speed is kept constant
via an engine out­
put adjustment or active brake intervention .
8_ WARNING
-Always pay attention to traffic even when
the cruise control is switched on . You are
always responsible for your speed and
the distance between your vehicle and
other vehicles. -
For safety reasons, the cruise contro l
should not be used in the city, in stop­
and-go traffic, on twisting roads and
when road conditions are poor (such as ice, fog, gravel, heavy rain and hydro­
plan ing) - risk of accident.
- Turn off the cruise control temporarily when enter ing turn lanes, highway exit
lanes or in construction zones .
- Please note that inadvertently "resting" your foot on the accelerator pedal causes
the cruise control not to brake. This is
because the cruise control is overridden
by the drive r's acceleration.
- If a brake system malfunction such as
overheating occurs when the cruise con­
trol system is switched on, the braking
function in the system may be switched
off . The other cruise control functions re­
main active as long as the indicator light
m:lmi (US models)/ . (Canadian mod­
els) is on.
(D Tips
The brake lights illuminate as soon as th e
brakes decelerate automatically.
Changing speed
"' Press lever in the 0 or O direction
c::>page 84, fig. 83 to increase or decrease
your speed.
"' Release the lever to save that speed .
Change speed in increments of 1 mph (1 km/
h) by lightly press ing the lever. If you keep the
lever pressed down , you will alter your speed
in 5 mph (10 km/h) increments .
You can also press the accelerator pedal down
to increase your speed, e .g. if you want to
pass someone . The speed you saved earlier
will resume as soon as you release the acceler­
ator pedal.
If, however, you exceed your saved speed by
6 mph (10 km/h) for longer than 5 minutes,
the cruise control will turn off temporari ly.
The green symbol in the display
c> page 84, .,..

ESP includes and/or works together with the
anti-lock brake assist system (ABS), brake as­
sist system, anti -slip regulation (ASR), elec­
tronic differential lock (EDL), dynamic steer­
ing* and electronic interaxle differential lock*.
ESP is switched on all the t ime . In certa in sit­
uations when you need less traction, you can
sw itch
off ASR by pressing the button above
the selector lever. Be sure to switch ASR on
again when you no longer need less traction.
Anti-lock braking system (ABS)
ABS prevents the wheels from locking up
when braking. The vehicle can still be steered even during hard braking . Apply steady pres­
sure to the brake pedal. Do not pump the ped­
al. A puls ing in the brake pedal indicates that
the system is he lping you to brake the vehicle.
Brake assist system
The brake assist system can decrease brak ing
distance.
It increases braking power when the
driver presses the brake pedal quickly in emer­
gency situations. You must press and hold the
brake pedal until the situation is over. In vehi­
cles with adaptive cruise control*, the brake
assist system is more sensitive if the distance
detected to the vehicle ahead is too small.
Anti-slip regulation (ASR)
ASR reduces engine power when the drive
wheels begin to spin and adapts the force to
the road conditions. This makes it easier to
start, accelerate and drive up hills .
Electronic differential lock (EDL)
The EDL brakes wheels that are spinning and
transfers the drive power to the other drive
wheel or whee ls if the vehicle is equipped with
a ll whee l drive *. This function is available up
to about 75 mph (120 km/h).
I n extreme cases, EDL automatically switches
off to help keep the brake on the braked wheel
from overheating . EDL will switch on again au­
tomatically when conditions have returned to
normal.
Intelligent technology 191
Dynamic steering*
On vehicles with dynamic steering, ESP helps
stabilize the steering in certain situations.
Electronic interaxle differential lock
function*
T he electronic interaxle differential lock func­
tion activates when driving th ro ug h curves.
Braking is targeted toward the wheels on the
inside of the curve as needed. This he lps to
minimize front whee l skid, improves traction
and allows for more precise driving through
curves .
A WARNING
- ESP, ABS, ASR, EDL, dynamic steering*
a nd the electronic interaxle differential
loc k fu nction* cannot overcome the laws
of physics. This is especially impo rtant
on slippery or wet roads.
If the systems
begin acting to stabilize your vehicle, you
should immediately change yo ur speed
to match the road and traffic conditions .
Do not let the increased safety provided
by these systems tempt you to take risks.
Doing so will increase the risk of a loss of
veh icle contro l, collision and ser ious per­
sonal injur ies.
- Always adapt your speed to road, traffic
and weather conditions. The risk of los­
ing con trol of the vehicle increases when
driving too fast, espe cially through
curves and on slippery or wet roads, and
when dr iving too close to vehicles up
ahead. ESP, ABS, the brake assist system,
EDL, ASR, dynam ic steer ing* and the
electronic interaxle differentia l lock func­
tion* cannot prevent collisions.
- Always accelerate with special care on
even, smooth surfaces such as those that
are wet or covered with ice and snow.
The drive wheels can spin even with
these assistance systems that cannot al­
ways he lp to reduce the risk of loss of ve­
hicle contro l.
-
•
•

198 Driving and en vi ro nment
Catalytic converter
It is very important that your emission con­
trol system (catalytic converter) is function­
ing properly to ensure that your vehicle is run­
ning in an environmentally sound manner .
.. Always use lead-free gasoline¢ page 218,
Fuel supply.
.. Never run the tank down all the way to emp-
ty .
.. Never put too much motor oil in your engine
¢ page 22 7, Adding engine oil 't=r. .
• Never try to push- or tow-star t your veh icle.
The catalytic converter is an eff ic ient "clean­
up" device built into the exhaust system of
the vehicle. The catalytic converter burns many of the pollutants in the exhaust gas be­
fore they are released into the atmosphere.
The exclusive use of unleaded fuel is critically
important for the l ife of the cata lytic conve rt­
e r and proper functioning of the engine.
& WARNING
-
- Do not park o r operate the vehicle in
areas where the hot exhaust system may
come in contact with dry grass, brush,
fuel spill or other material which can cause a fire.
- Do not apply additional undercoating or
rustproofing on or near the exhaust
man ifold, exhaust p ipes, catalytic con­
verter or heat shie lds . During driving, the
substance used for undercoating could
overheat and caus e a fire .
@ Note
-Be aware that just one tank filling with
leaded fuel will already seriously de­
grade the perfo rmance of the catalytic
conve rter .
- Do not exceed the correct engine oil leve l
¢page 227.
-Do not drive until the fuel tank becomes
completely empty. The eng ine could mis­
fire . Un burned f uel could a lso get into the exhaust system and th
is co uld cause
the cata lytic converter to overheat .
- Do not switch
off the ignition while the
vehicle is moving .
- Do not continue to ope rate your veh icle
under these conditions, as otherwise fuel
can reach the catalytic converter. This
cou ld result in overheating of the con­
verter, requir ing its replacement .
- To assure efficient operation of the Emis ­
sion Control System:
- H ave you r vehicle maintained properly
and in accordance w it h the service rec­
ommendat ions in your Warranty &
M ain tenance boo klet.
- L ack of prope r maintenance as we ll as
improper use of the vehi cle will impair
the function of the em ission contro l
system and could lead to damage .
@ For the sake of the environment
Even when the Emiss ion Control Sys tem is
operat ing proper ly, the exha ust gas can
have a sul fur -li ke ex haust gas smell 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 f il li ng the tank with lead-free super
grade gasoline .
Avoid damaging the
vehicle
When you are d rivi ng on poor roads, or over
c u rbs, steep ramps, etc., ma ke certai n that
low- ly ing parts s uch as spoilers and exha ust
system parts do not bottom o ut and get dam ­
aged.
T his is es peci ally true for ve hicles with low­
s lung chassis (spor ts chassis)* and fully load­
ed vehicles .

Engine cooling system
Coolant
The engine coolant performs two functions: it
keeps the engine from overheating and it pro ­
te cts the engine from freezing in the winter .
The cooling system is sealed and generally re­
qu ires little attention .
The cooling system has been filled at the fac­
tory with a permanent coolant which does not need to be changed. The coolant consists of a
mixture of water and the manufacturer's gly ­
col-based coolan t additive G12++ ant ifreeze
with a nticorrosion add itives (50% fo r USA
models; 60% for Canad ian models). This mix­
ture bot h assu res the ne ces sary frost protec­
tion and protects metal components in the
engine's cooling system from corrosion and
scaling. It also raises the bo ili ng po int of t he
coolant.
D o not red uce the concentration of the coo l­
ant in the summe r by adding plain water .
The
proportion of coolant addit ive must be at
least 50% but not mo re than 60 %
to main­
tain antifree ze protection and cooling efficien­
cy. If the coolant frost protect ion is too low,
the coolant could freeze and damage the veh i­
cle heating and eng ine cooling system .
For year-round driving, antifree ze is added at
the factory for temperatures down to:
- -3 1°F (-35°C)USA
- -4 0 ° F ( - 4 0 °C) Canada.
You can mix t he G12 ++ cool ant ad ditive with
o ther addit ives (G1 2+ or G1 2). Alway s check
w ith your author ized Audi dealer.
& WARNING
Before yo u check any thing in the engine
compartment, always read and hee d all
W AR NIN GS
Q .&. in Working in the engine
compartment on page 222.
(D Note
- Before win ter se ts in , have the coolan t
checked to see if the coolant addit ive i n
Checkin g and fillin g 229
your vehicle is sufficient to meet the cli ­
mate conditions . This is especia lly impor­
tant if you live in a reg ion where t he win­
ter is extreme ly co ld. If necessary, in­
crease t he p ropo rtion of coo lant add itive
t o 60% .
- Whe n add ing coolant additive to your
cooling system , remember :
- W e re co mme nd usin g only cool ant ad­
dit ive G 12++ (check t he labe l) for your
vehi cle. This coolan t addi tive is ava ila­
b le at a uthorized Audi dea le rs . Othe r
types of ant ifreeze can significant ly re­
d uce co rrosi on protection. The res ult­
i n g corrosion can ca use a loss of co ol­
ant and ser io us eng ine damage .
- Do not add any type of rad iator leak seal­
ant to you r vehicle's eng ine c oolant .
Add ing radiator repair fl uid may adverse­
ly affect t he f unction and performance of
yo ur cooling sys tem and co uld resu lt i n
damage not covered by yo ur New Ve hicle
Li mi ted Warran ty.
Checking the engine coolant level
The engine coolant level can be chec ked with
a quick glan ce.
:!, MAX
% MIN
Fig. 180 En gin e compar tment: mark ings on t he coo l­
a n t expa nsion tank
Befo re you check a nyth ing in the eng ine com­
partment,
always read and heed all WARN­
INGS ¢.&, in Working in the engine compart­
men t on page
222 .
"' Switch off the ignition .
"' Read the engine coo lant level from the coo l­
ant expa nsion tank
Qfig . 180. Wit h a co ld
eng ine , the coo lant level s hou ld be between
1JJ>-