engine overheat AUDI TT ROADSTER 2016 User Guide

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technology
Brake servo
The brake servo amplifies the pressure you apply
to the brake pedal.
A WARNING
- When applying the brakes to clean off de­
posits on the pads and discs, select a clear,
dry road. Be sure not to inconvenience or en­
danger other road users; do not risk an acci­
dent.
- Never let the car coast with the engine
switched off (this can cause accidents).
CD CAUTION
- Never let the brakes "drag" by leaving your
foot on the pedal
when
you do not really in­
tend to brake. This overheats the brakes, re­
sulting 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 in­
tervals than to apply the brakes continuous­
ly.
� Note
-If the brake servo is out of action, you must
apply considerably more pressure to the
brake pedal than you normally would.
- 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 front
wheels is not obstructed, otherwise the
brakes can overheat.
Electro-mechanical
power steering
Electro-mechanical power steering assists the
driver when steering.
The degree of power assistance is adapted elec­
tronically, depending on the speed.
116 Warning/indicator
lamps and driver
messages
• Steering: fault. Please stop vehicle
If the warning lamp Lights up permanently and
the message appears, there may be a power
steering failure.
Stop the vehicle in a safe place as soon as possi­
ble. Do NOT drive on. Obtain professional assis­
tance.
� Steering: fault. You can continue driving
If the indicator lamp lights up, the steering re­
sponse may be heavier or Lighter than usual. In
addition, it is possible that the steering wheel
will be off centre when driving in a straight Line.
Drive slowly to a qualified workshop and have the
fault rectified.
('!)) Note
You can drive on if the warning/indicator
lamp . or� Lights up only briefly.
Four-wheel drive
(quattro)
Applies to: vehicles with four-wheel drive
On quattro models the engine power is distrib­
uted to all four wheels.
General 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 113, Electronic stabilisation con­
trol (ESC).
The four-wheel drive is specially designed to
complement the superior engine power of your
Audi. This combination gives the car exceptional
handling and performance capabilities -both on
normal roads and in more difficult conditions,
such as snow and ice. Even so (or perhaps espe­
cially for this reason), it is important to observe
certain safety points¢&.
�

Downloaded from www.Manualslib.com manuals search engine Checking
and topping up fluids
... After fuelling, remove the funnel and close the
fuel tank flap so that it locks in place.
CD CAUTION
Remove any fuel spills from the paintwork im­
mediately.
Releasing the tank flap manually
The tank flap can be released manually if the
tank unlocking system should fail to operate.
Fig. 211 Luggage compartment: Cover in the right side
trim
... Open
the boot lid .
... Lift the floor panel.
... Release the ring from its holder and carefully
pull the ring ¢Fig. 211.
Emission control
systems
Catalytic converter
Applies to: vehicles with petrol engine
The vehicle must only be used with unleaded pet­
rol, otherwise the catalytic converter will be ir­
reparably damaged.
Never allow the fuel tank to run completely dry,
as the irregular supply of fuel can cause misfir­
ing. This allows unburnt fuel to enter the exhaust
system, which can cause overheating and dam­
age to the catalytic converter.
Diesel particulate filter
Applies to: vehicles with diesel engine
The diesel particulate filter can filter out almost
all soot particles contained in the exhaust gas. In
normal driving conditions the filter is self-clean-
244 ing.
Should the self-cleaning function of the filter
not be able to operate, e.g. when the vehicle is
continuously used only for short trips, the filter
becomes obstructed with soot and the symbol
C for the diesel particulate filter lights up
¢page 17.
A WARNING
The exhaust system is very hot when the vehi­
cle is being driven and after the engine has
been switched off.
- Never touch the tailpipes when they are hot
- risk of burns!
- Because of the high temperatures which can
occur in the emission control system, do not
park the vehicle where the exhaust can
come into contact with flammable materials
under the car (e.g. on grass or at the forest
edge) -risk of fire!
- Do not apply any underseal agents in the
area around the exhaust system -risk of
fire!
Engine compartment
Working on components in the engine
compartment
Extra caution is necessary when working on com­
ponents in the engine compartment.
Always be aware of the danger of injury and
scalding as well as the risk of accident or fire
when working in the engine compartment (e.g.
when checking and refilling fluids). Always ob­
serve the warnings listed below and follow all
normal safety precautions. The engine compart­
ment of any motor vehicle is a potentially haz­
ardous area ¢ A .
A WARNING
- Switch off the engine.
- Switch off the ignition.
- Apply the parking brake.
- Put the gear lever in neutral or selector in P.
- Wait for the engine to cool down.
- Keep children away from engine compart-
ment.

Downloaded from www.Manualslib.com manuals search engine Checking
and topping up fluids
Any loss of coolant normally indicates a leak in
the cooling system. Drive to a qualified workshop
without delay and have the cooling system
checked. If there are no leaks in the system, a
loss of coolant can only occur if the coolant boils
and is forced out of the system as a result of
overheating.
A WARNING
- The cooling system is under pressure. Do
not unscrew the cap on the expansion tank
when the engine is hot: you could be scal­
ded by escaping steam.
- The coolant and coolant additive can be a
health hazard. Store the coolant additive in
the original container in a safe place out of
reach of children -risk of poisoning.
- When working in the engine compartment
be aware that the radiator fan may start
running suddenly, even if the ignition is
switched off- risk of injury!
CD CAUTION
Do not add coolant if the expansion tank is
empty. Air could have got into the cooling
system -risk of engine damage! In this case,
do NOT drive on. Obtain professional assis­
tance.
Brake fluid
&
8cm DOT 4 �
0
0
Fig. 218 Engine compartment: Cap of brake fluid reservoir
Please refer to the safety notes ¢ A in Working
on components in the engine compartment on
page 244.
250 Checking
brake fluid level
� Read off the brake fluid level on the brake fluid
reservoir ¢page 246, Fig. 214. The brake fluid
level must be between the MIN and MAX marks
¢_A.
The brake fluid level is also automatically moni­
tored.
Having brake fluid changed
Have the brake fluid changed regularly by a quali­
fied workshop.
A WARNING
- If the brake fluid level is under the MIN
mark, the effectiveness of the brakes and
therefore the safety of the vehicle may be
impaired -risk of accident! Do not drive on.
Obtain professional assistance.
- Heavy use of the brakes may cause a vapour
lock if old brake fluid is left in the system.
This would seriously impair the effective­
ness of the brakes and the safety of the car
- risk of accident!
CD CAUTION
- If the brake fluid level is above the MAX
mark, brake fluid may escape via the cap on
the reservoir in certain circumstances and
cause damage to the vehicle.
- Brake fluid must not be allowed to come in­
to contact with the vehicle's body, other­
wise it will attack the paintwork.
Battery General warnings for batteries
Because of the complexity of the power supply,
any battery work, such as disconnection, replace­
ment, etc. must be carried out by a qualified
workshop ¢ ,& .
The term "vehicle battery" refers to the 12 Volt
battery in your vehicle.
�

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Tyre pressure
monitoring system
General notes
Applies to: vehicles with tyre pressure monitoring system
The tyre pressure monitoring system keeps a
check on the tyre pressures of the four road
wheels while you are driving.
The system uses sensors to measure tempera­
tures and pressures in the tyres. The sensors
transmit the data to the control unit by radio.
The tyre pressure monitoring system displays the
current pressures and temperatures of the tyres
on the infotainment system while the vehicle is
moving ¢ page 260. In addition, it compares the
current tyre pressures with the stored tyre pres­
sures and warns you if it detects a discrepancy
¢page 261.
The system cannot check if the stored tyre pres­
sures correspond to the recommended tyre pres­
sures for your vehicle. You must store the new
tyre pressures ¢ page 261:
- after every adjustment to the tyre pressures,
e.g. after changing the laden weight of your ve­
hicle,
- after changing a wheel, or
- when using wheels with new wheel sensors.
.&_ WARNING
- The tyre pressure monitoring system helps
the driver to monitor the tyre pressures.
However, it is always the driver's responsi­
bility to ensure that the tyres are at the cor­
rect pressure.
- Never re-adjust the tyre inflation pressure
when the tyre is hot. This can cause serious
damage to the tyre or even a blow-out,
which could result in an accident.
- Under-inflated tyres flex more than they
should. This causes them to overheat. This
can cause tread separation and tyre blow­
out, which could result in an accident.
- The tyre pressure monitoring system cannot
warn you of tyre damage or defects that
could lead, for example, to a tyre blow-out.
Perform a regular visual check of your tyres.
260 (I))
Note
- The sensors and valves do not have to be de­
tached or changed round when fitting new
tyres. Only the valve core needs to be re­
placed, and if necessary the valve and the
electronic components in the wheel. Please
contact a qualified workshop if you have any
questions.
-After using the tyre repair kit, the tyre pres­
sure monitoring system may malfunction.
Have the sensors renewed by a qualified
workshop.
Displaying tyre pressures and temperatures
Applies to: vehicles with tyre pressure monitoring system
Important: The vehicle must be moving.
.. Select the following on the infotainment sys­
tem: !MENU! button> Servicing & checks >
Tyre pressure loss indicator > Display tyre
pressures.
The current tyre pressures are displayed in green,
yellow or red on the infotainment system:
- Green: The tyre pressure is roughly the same as
the reference value.
- Yellow: The tyre pressure is too low compared
with the reference value.
- Red: The tyre pressure is much too low com-
pared with the reference value.
The reference value is the last stored tyre pres­
sure value ¢ page 261.
Bear in mind that the tyre inflation pressure is al­
so influenced by the temperature of the tyre. The
tyre heats up while the vehicle is being driven
and the tyre pressure will rise accordingly.
.&_ WARNING
Please observe the important safety informa-
tion and notes ¢ page 260.
�

Downloaded from www.Manualslib.com manuals search engine Mobility
- If it was not possible to build up a tyre pres­
sure of 2.0 bar within 6 minutes this means
that the tyre is too badly damaged. Do not
drive on.
- Seek professional assistance if the repair of
a tyre puncture is not possible with the seal­
ing compound.
{D Note
Do not use the compressor for longer than
6 minutes at a time, as it could overheat.
When the compressor has cooled down, you
can use it again.
After repairing a tyre
Applies to: vehicles with tyre repair kit
.,. Affix the sticker "max. 80 km/h", which is inclu­
ded in the tyre repair kit, to the dashboard
where the driver will see it.
.,. After about 10 minutes, stop to check the tyre
pressure .
.,. If
tyre pressure is less than 1.3 bar, the tyre is
too badly damaged. Do not drive on.
A WARNING
After repairing a tyre please note the follow­
ing points:
- Do not drive faster than 80 km/h.
-Avoid heavy acceleration, hard braking and
fast cornering.
- Vehicle handling could be impaired.
- If the tyre is too badly damaged, you should
seek professional assistance.
® For the sake of the environment
A used can of sealing compound can be re­
turned to your qualified workshop for dispos­
al.
@ Note
After repairing a tyre, remember to buy a new
tyre sealant can at a qualified workshop.
272 Changing
a wheel
Preparations
Certain preparations must be made before you
change the wheel.
.,. Please refer to the important safety notes
¢ page 269, General notes.
.,. Apply the
parking brake .
.,. Manual gearbox: Engage first gear.
.,. Automatic gearbox: Move the selector lever to
position P.
.,. Take out the
tools ¢ page 2 70 and spare wheel
¢page 276.
A WARNING
If you have to use the jack* on a gradient or
off-road track, block the wheel diagonally op­
posite the wheel being changed by placing
suitable objects underneath both the front
and rear of the wheel to prevent the vehicle
from rolling away.
Removing the hubcap/wheel bolt caps -