2007 AUDI R8 engine overheat

Instruments and warning/indicator lamps13
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data Warning lamp

If the symbol
 flashes in the display, this means that either the
coolant temperature is too high or the coolant level is too low
⇒page 35.
If the needle is over to the far right on the dial, this means the
coolant temperature is too high. Stop the vehicle, switch off the
engine and wait for it to cool down. If the warning lamp starts
flashing again after just a short distance, contact a qualified work-
shop.
WARNING
•
Before opening the engine lid and checking the coolant level,
please observe the warning information on ⇒page 155, “Working
on components in the engine compartment”.
•
Never open the engine lid if you can see or hear steam or
coolant escaping from the engine compartment; there is a risk of
being scalded. Wait until you can no longer see or hear escaping
steam or coolant.Caution
•
Additional lights and other accessories in front of the air inlet
reduce the cooling effect of the radiator. At high outside tempera-
tures and high engine loads, there is a risk of the engine over-
heating.
•
The front spoiler also ensures proper distribution of the cooling
air when the vehicle is moving. If the spoiler is damaged this can
reduce the cooling effect, which could cause the engine to overheat.
You should obtain professional assistance.
Fuel gaugeThe gauge only works when the ignition is switched on. When the
needle reaches the reserve zone, the symbol
 lights up in the instrument cluster display ⇒page 36. At this point there are still
about 10 litres of fuel left in the tank. This is your reminder to fill up
soon.
The tank capacity of your vehicle is given in the Technical data
section ⇒page 198.
Caution
Never run the tank completely dry. If there is an irregular fuel supply,
misfiring can occur. This allows unburnt fuel to enter the exhaust
system, which could cause overheating and damage the catalytic
converter.Speedometer with mileage recorder
This instrument indicates the speed of the vehicle and the
distance travelled.The mileage is normally stated in kilometres (km). On some models,
however, the mileage recorder will show miles.
Lower mileage recorder (odometer)
The lower counter records the vehicle's total mileage.
Fig. 5 Detail of the
instrument cluster:
Mileage recorder with
reset button
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Driver information system 34Yellow symbols are accompanied by one warning chime. The func-
tion indicated should be checked as soon as possible. If several
faults are detected at the same time, the symbols are displayed one
after the other for about 2 seconds at a time.
Driver messages
Additional messages to assist the driver are displayed in
conjunction with the warning lamps and symbols in the
instrument cluster.The display will show the appropriate message if the system detects
a bulb failure ⇒page 37, if the brake pads are worn or you have not
yet selected a gear on a vehicle with R tronic.
The driver can also call up messages in the display for additional
information if a red warning symbol starts flashing.
Calling up driver messages
For example, in the event of an oil pressure malfunction the oil pres-
sure symbol

will appear in the display. If you now press the
adjuster/test button ⇒fig. 31 for at least one second, the following
message will appear in the display:
SWITCH OFF ENGINE AND CHECK OIL LEVEL
The message will disappear from the display after about 5 seconds.
If required, the message can be called up again by briefly pressing
the adjuster/test button.

Brake pads worn
⇒page 37

Speed warning 1*
⇒page 37

Speed warning 2*
⇒page 37

Dynamic headlight range con-
trol faulty
⇒page 37

Washer fluid level low
⇒page 37

Battery voltage too high or too
low
⇒page 37

Bulb monitor
⇒page 37
 or BRAKE
LIGHT
Brake light failure
⇒page 38

Light sensor/rain sensor (auto-
matic headlights) defective
⇒page 38
 and

Selector lever defective*
No R gear*
⇒page 38
 and

Clutch overheating*
⇒page 38
Fig. 31 Detail of the
instrument cluster:
Adjuster/test button
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Driver information system35
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Fault in the brake system

The warning lamp flashes when the handbrake is applied,
or if the brake fluid level is too low or if there is a fault in
the ABS system.If the symbol

flashes in the display when the handbrake
is not applied, there is a fault in the brake system. One of the
following messages will appear in the display together with
the symbol:
Stop vehicle and check brake fluid level
Brake fault ! Drive carefully to nearest workshop
–Stop the vehicle.
– You should obtain professional assistance.
If the ABS fails, the ABS warning lamp
 will light up together with
the brake warning symbol
 ⇒.
Handbrake applied
The warning lamp
 also lights up when the handbrake is applied.
In addition to this, a warning buzzer will sound after driving for
3 seconds at a speed above 5 km/h.
WARNING
•
If the brake fluid level in the reservoir is too low, this could
result in an accident. Do not drive on. You should obtain profes-
sional assistance.
•
If the brake warning lamp lights up together with the ABS
warning lamp, this can mean that the control function of the ABS
is out of action. As a result the rear wheels can lock relatively
easily when braking. This could cause the tail of the vehicle to skid
sideways. Drive carefully to the nearest qualified workshop and
have the fault rectified.
Fault in the cooling system

Faults in the cooling system must be rectified immedi-
ately.If the
 symbol flashes in the display, this means that either
the coolant temperature is too high or the coolant level is
too low. The following message will appear in the display
together with the symbol:
Switch off engine, check coolant level
– Stop the vehicle.
– Switch off the engine.
– Check the coolant level ⇒page 160.
– Add more coolant if necessary ⇒page 160.
– Wait for the symbol to go out before driving on.
– Obtain professional assistance if necessary.
If the coolant level is correct, the overheating may be caused by a
malfunction of the radiator fan.
If the alternator warning lamp lights up as well ⇒page 18, it is
possible that the drive belt has broken.
WARNING
•
If your vehicle should break down for technical reasons, stop it
at a safe distance away from moving traffic, switch off the engine
and turn on the hazard warning lights ⇒page 56, “Hazard
warning lights ”.
•
Never open the engine lid if you can see or hear steam or
coolant escaping from the engine compartment; there is a risk of
being scalded. Wait until you can no longer see or hear escaping
steam or coolant.
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Driver information system 38The message disappears after 5 seconds. Press the adjuster/test
button ⇒page 10, fig. 2 briefly if you wish to call up the message
again.
If the display indicates that one of the lights is not working, this can
have a number of causes:•
Bulb failure ⇒page 193.
•
A “blown” fuse ⇒page 190, “Changing fuses”.
•
Defective electrical wiring.
Have the components replaced or the wiring repaired as necessary
by a qualified workshop.
WARNING
•
Bulbs are sensitive to pressure. The glass can break when you
touch the bulb, causing injury.
•
Incorrect handling of the high-voltage element of xenon gas-
discharge bulbs can have potentially fatal consequences.
Brake light failure

If the symbol
 or the text BRAKE LIGHT lights up, check the
following components:
•
Brake light bulbs
•
Wiring connections
•
Brake light switch
Have the components repaired or replaced by a qualified workshop.Note
The brake light switch is only tested during the initial systems check
after starting the engine.
Applies to vehicles: with light sensor/ rain sensorLight sensor/rain sensor

This indicator lamp comes on if the automatic headlights/
automatic wipers are defective.If the
 symbol appears, this means that the light sensor/ rain
sensor is not functioning. For safety reasons, the dipped beam
headlights will then be switched on permanently when the light
switch is set to the AUTO position. However, you can still switch the
lights on and off in the normal way with the light switch. If the rain
sensor is defective, the functions operated via the windscreen wiper
lever will still be available. You should have the light sensor/ rain
sensor checked by a qualified workshop as soon as possible.
Applies to vehicles: with R tronicSelector lever defective
 and

  Selector lever defective! No R gear!
If these symbols light up, there is a fault in the R tronic selector
lever. The indicators on the selector lever will go out or flash. It is no
longer possible to engage reverse gear. If you were using the
gearbox in manual mode, it will switch back to automatic mode.
You can continue to change gear manually. Starting in neutral (N),
pull the paddle lever on the steering wheel to engage first gear.
The gearbox will now remain in manual mode and you can select the
gears using the paddle levers.
You should have the selector lever checked by a qualified workshop
as soon as possible.
Applies to vehicles: with R tronicClutch overheating
 and

  Clutch is overheating ! If possible please stop vehicle.
A8
A+
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Driving 84
WARNING
Please note that the handbrake should be released all the way. If it
is only partially released this will cause overheating of the rear
brakes, which can impair the function of the brake system and
could lead to an accident.
Caution
Once the vehicle has come to a standstill, always apply the hand-
brake firmly and then engage a gear.Parking the car
Please note the following points to ensure there is no risk
of the car rolling away accidentally after it is parked.– Use the foot brake to stop the vehicle.
– Apply the handbrake firmly.
– Switch the engine off.
– Engage a gear ⇒.When parking on gradients
Turn the steering wheel so that the vehicle would roll into the kerb
if it did start to move accidentally.
WARNING
•
Do not leave anyone (especially children) in the vehicle when it
is locked. Locked doors could delay assistance in an emergency,
potentially putting lives at risk.
•
Never leave children unsupervised in the vehicle. They could,
for example, release the handbrake or put the gearbox in neutral.
The vehicle could then start moving and cause an accident.
Applies to vehicles: with hill hold assistDriving away on a slopeThe hill hold assist function makes it easier to drive away on a slope.
The system is activated when you press and hold the brake pedal for
a few seconds.
When you release the brake pedal the braking force will be main-
tained for a moment in order to hold the vehicle and make it easier
for you to drive away.
WARNING
•
If you do not drive away immediately after releasing the brake
pedal the vehicle could start to roll back. You should therefore
immediately press the brake pedal or apply the handbrake.
•
If the engine should stall you must immediately press the brake
pedal or apply the handbrake firmly.
•
If you are driving away on a slope in stop-and-go traffic press
and hold the brake pedal for a few seconds before driving off. This
will prevent the vehicle from rolling back unintentionally.Note
To find out whether your vehicle is equipped with the “hill hold
assist” function please contact an Audi R8 dealership or qualified
workshop.
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Automatic gearbox 92maximum engine speed is reached, unless you have activated the
sport function ⇒page 90.
If you select a lower gear, the R tronic gearbox will not shift down
until there is no risk of overrevving the engine.
You can change over to automatic mode at any time ⇒page 92.
WARNING
•
The driver should never get out of the vehicle when the engine
is running and a gear is engaged. If you have to leave your vehicle
while the engine is running, you must apply the parking brake and
engage neutral gear (N).
•
If the engine is running and a gear is engaged, you will need to
hold the car with the footbrake.
•
Do not press the accelerator while selecting a gear with the
vehicle stationary and the engine running, as this could cause an
accident.
•
To avoid rolling back on gradients always hold the vehicle with
the footbrake if you have to stop. Never attempt to hold the vehicle
with the clutch when stopping on a gradient. The clutch is disen-
gaged automatically if it is overloaded and becomes too hot - acci-
dent risk! Before the clutch is disengaged, the vehicle will jolt and
the driver information system will display a warning that the
clutch is overloaded.
•
Before you drive down a steep gradient, reduce the speed and
use the R tronic to select a lower gear.
•
Never allow the brake to drag and do not use the brake pedal
too often or for long periods. Constant braking will cause the
brakes to overheat and will considerably reduce the effectiveness
of the brakes. It will increase the braking distance and could cause
the brake system to fail.
Applies to vehicles: with R tronicAutomatic modeThe gearbox changes the forward gears up and down
automatically.Driving away from a standstill
– Press and hold the brake pedal.
– Briefly push the selector lever towards position A.
– Release the brake and press the accelerator ⇒ in
“Manual mode” on page 91.In some situations (such as when driving on mountain roads) it can
be advantageous to switch temporarily to the manual shift
programme ⇒page 91, so that the gear ratios can be selected
manually to suit the driving conditions.Applies to vehicles: with R tronicKick-down featureWhen the accelerator pedal is pressed right down past the point of
resistance at full throttle, the R tronic gearbox will shift down to a
lower gear, depending on road speed and engine speed. The upshift
to the next higher gear is delayed until the engine reaches
maximum rpm. This does not apply if you have activated the sport
function.
WARNING
Please note that if the road surface is slippery or wet, the kick-
down feature could cause the driving wheels to spin, which could
result in skidding.
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Intelligent technology135
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data We ar
The rate of wear on the brake pads depends a great deal on how you
drive and the conditions in which the vehicle is operated. Negative
factors are, for instance, city traffic, frequent short trips or hard
driving with abrupt starts and stops.
Wet roads; road salt
When you are driving at a speed higher than 70 km/h and have the
windscreen wipers switched on (at or above intermittent setting 4)
the brake pads are very briefly brought into contact with the brake
discs. This automatic process which goes unnoticed by the driver is
carried out at regular intervals and is intended to improve braking
response in wet conditions.
In certain conditions, such as in heavy rain, or after washing the car
or driving through water, the full braking effect can be delayed by
moisture (or in winter by ice) on the discs and brake pads. The
brakes should be “dried” by pressing the pedal to restore full
braking effect.
The effectiveness of the brakes can also be temporarily reduced if
the car is driven for some distance without using the brakes when
there is a lot of salt on the road in winter. The layer of salt that accu-
mulates on the discs and pads can be removed with a few cautious
brake applications.
Corrosion
There may be a tendency for dirt to build up on the brake pads and
corrosion to form on the discs if the car is used infrequently, or if
you only drive low mileages without using the brakes very much.
If the brakes are not used frequently, or if corrosion has formed on
the discs, it is advisable to clean off the pads and discs by braking
firmly a few times from a moderately high speed ⇒.
Faults in the brake system
If the brake pedal travel should ever increase suddenly, this may
mean that one of the two brake circuits has failed. Drive immedi-
ately to the nearest qualified workshop and have the fault rectified. On the way to the dealer, be prepared to use more pressure on the
brake pedal and allow for longer stopping distances.
Low brake fluid level
Malfunctions can occur in the brake system if the brake fluid level is
too low. The brake fluid level is monitored electronically.
Brake servo
The brake servo amplifies the pressure you apply to the brake pedal.
It only works when the engine is running.
WARNING
•
When applying the brakes to clean off deposits on the pads and
discs, select a clear, dry road. Be sure not to inconvenience or
endanger other road users; do not risk an accident.
•
Never let the car coast with the engine switched off (this can
cause accidents).Caution
•
Never let the brakes “drag” by leaving your foot on the pedal
when you do not really intend to brake. This overheats the brakes,
resulting in longer stopping distances and greater wear.
•
Before driving down a long, steep gradient, it is advisable to
reduce speed and select a lower gear. In this way you will make use
of the engine braking effect and relieve the load on the brakes. If you
still have to use the brakes, it is better to brake firmly at intervals
than to apply the brakes continuously.Note
•
If the brake servo is out of action due to a malfunction, or if the
car has to be towed, you will have to press the brake pedal consid-
erably harder to make up for the lack of servo assistance.
•
If you wish to equip the car with accessories such as a front
spoiler or wheel covers, it is important that the flow of air to the
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Intelligent technology 136front wheels is not obstructed, otherwise the brakes can overheat. Power steeringThe power steering assists the driver when turning the
steering wheel (with the engine running).The power steering assists the driver by reducing the force needed
to turn the steering wheel.
The power steering does not function when the engine is switched
off. In this case the steering wheel is very hard to turn.
If the steering is held at its turning limit when the car is stationary,
this will place an excessive load on the power steering system. In
this case, the power steering system will make noises. It will also
reduce the idling speed of the engine.
Caution
Do not keep the steering in the full-lock position for longer than
15 seconds when the engine is running – this could cause damage
to the power steering system.
Note
•
If the power steering should fail at any time or the engine is
switched off (for instance when being towed), the car can still be
steered. However, more effort will be required to turn the steering
wheel.
•
If the system is leaking or malfunctioning, please take the car to
a qualified workshop as soon as possible.
•
The power steering requires a special hydraulic fluid. The
container for the fluid is located in the engine compartment. The
correct fluid level in the reservoir is important for the power
steering to function properly. The hydraulic fluid level is checked at
the Inspection Service.
Four-wheel drive (quattro®)On quattro models the engine power is distributed to all
four wheelsGeneral notes
On four-wheel drive vehicles, the engine power is distributed to all
four wheels. The distribution of power is controlled automatically
according to your driving style and the road conditions. Also refer
to ⇒page 132.
Winter tyres
Thanks to its four-wheel drive, your car will have plenty of traction
in winter conditions, even with the standard tyres. Nevertheless, we
still recommend that winter tyres should be fitted on all four wheels
when winter road conditions are expected, mainly because this will
give a better braking response.
Snow chains
On roads where snow chains are mandatory, this also applies to cars
with four-wheel drive ⇒page 171, “Snow chains”.
Replacing tyres
The dimensions of the wheels and tyres used on four-wheel drive
vehicles must comply with the manufacturer's specifications
⇒page 168, “Replacing wheels and tyres”.
WARNING
•
Even with four-wheel drive, you should always adjust your
speed to suit the conditions. Do not let the extra safety provided
tempt you into taking any risks when driving – this can cause acci-
dents.
•
The braking ability of your car is limited by the grip of the tyres.
In this respect, your car is no different from a car without four-
wheel drive. So do not be tempted to drive too fast on icy or slip-
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