2008 AUDI A5 COUPE service

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Page 240 of 313

AUDI A5 COUPE 2008 Owners Manual Checking and topping up fluids
238Brake fluidChecking brake fluid level
The brake fluid level can be checked at a glance.– Check the fluid level on the brake fluid reservoir
⇒fig. 228. It should

Checking and topping up fluids
238Brake fluidChecking brake fluid level
The brake fluid level can be checked at a glance.– Check the fluid level on the brake fluid reservoir
⇒fig. 228. It should always be between the “MIN” and
“MAX” marks.In right-hand drive vehicles the brake fluid reservoir is on the other
side of the engine compartment.
The fluid level may drop slightly after a period of time due to the
automatic compensation for brake pad wear. This is quite normal.
However, if the level goes down noticeably in a short time, or drops
below the “MIN” mark, there may be a leak in the brake system. If
the fluid level in the reservoir is too low, this will be indicated by the
brake warning lamp ⇒page 31 . If this should happen, take the car
to a qualified workshop immediately and have the brake system
inspected.
Changing brake fluid
When required, the brake fluid should be changed by a
competent mechanic with the proper equipment.Brake fluid gradually absorbs moistu re from the atmosphere. If the
water content in the brake fluid is too high, this may cause corrosion
in the brake system over time. In addition, the boiling point of the
brake fluid will be considerably reduced. This could adversely affect
the braking ability in certain circumstances.
For this reason the brake fluid must be changed periodically.
Your vehicle's Service Schedule will tell you when the brake fluid has
to be changed.
It is advisable to have the brake fluid changed as part of a regular
Inspection Service at your Audi workshop. They are familiar with the
procedure and have the necessary special tools and spare parts as
well as the proper facilities for disposing of the old fluid.
Use only the genuine brake fluid specified by the factory Qualified
workshops know that the brake fluid “DOT 4” is approved by Audi.
The brake fluid must be fresh and unused.
WARNING
•
Brake fluid is poisonous; store it in the sealed original container
in a safe place out of reach of children.
•
Heavy use of the brakes may caus e a vapour lock if the brake
fluid is left in the system for too long. This would seriously affect
the efficiency of the brakes and the safety of the car – risk of acci-
dent.Caution
Please note that brake fluid will attack the paintwork on contact.
Fig. 228 Engine
compartment: Mark-
ings on brake fluid
reservoir
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AUDI A5 COUPE 2008 Owners Manual Checking and topping up fluids239
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
For the sake of the environment
If the fluid has to be drained out of the brake system, use

Checking and topping up fluids239
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
For the sake of the environment
If the fluid has to be drained out of the brake system, use an appro-
priate container to catch the used brake fluid and dispose of it in the
proper manner.BatteryGeneral notes
All work on batteries requires specialist knowledge.The battery is virtually maintenance-free . It is checked as part of the
Inspection Service.
We recommend that you replace a battery once it is older than 5
years.
When an airbag is triggered, the battery will, under certain circum-
stances, be disconnected from the on-board power supply for
safety reasons ⇒ in “General notes on airbag system” on
page 176 .
Disconnecting the battery
If the battery is disconnected, some of the vehicle's functions will
become inoperative (e.g. electric windows). These functions will
require resetting after the battery is reconnected. For this reason,
the battery should only be disconnected from the vehicle's electrical
system when absolutely necessary.
If the vehicle is not used for long periods
If you do not drive your vehicle for a period of several days or weeks,
the power management will gradually shut off the on-board
systems one by one, or reduce the amount of current they are using.
This limits the amount of power consumed and helps to ensure reli-
able starting even after a long period ⇒page 202 . Please note that certain convenience features, such as the Audi
advanced key*, the remote control key or the electrical seat adjust-
ment may not be available when yo
u unlock the vehicle. These func-
tions will be restored when you switch on the ignition and start the
engine.
Winter conditions
At low temperatures the battery has to work very hard. It also
provides only a fraction of the starting power it has at normal
temperatures.
For this reason, we recommend having the battery checked and
charged if necessary before the start of winter ⇒page 241 .
WARNING
•
All work on batteries requires sp ecialist knowledge. For queries
regarding the vehicle battery please contact an Audi dealership or
other qualified workshop (risk of chemical burns / risk of explo-
sion).
•
The battery must not be opened. Do not attempt to make any
changes to the electrolyte level of the battery. Otherwise, there is
a risk that a mixture of oxygen and hydrogen gas can accumulate
and cause an explosion.Note
If the vehicle is to be left standing for a period of several weeks at
extremely low temperatures, the battery should be removed from
the vehicle. This ensures that it cannot “freeze up” and be
damaged.
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Page 245 of 313

AUDI A5 COUPE 2008 Owners Manual Wheels and tyres243
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Wheels and tyresWheelsGeneral notes–When driving with new tyres , be especially careful during
the firs

Wheels and tyres243
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Wheels and tyresWheelsGeneral notes–When driving with new tyres , be especially careful during
the first 500 km.
– If you have to drive over a kerb or similar obstacle, drive very slowly and as near as possible at a right angle to the
kerb.
– Inspect the tyres regularly for damage (cuts, cracks or blisters, etc.). Remove any foreign bodies embedded in
the treads.
– Damaged wheels and tyres must be replaced immedi- ately.
– Keep grease, oil and fuel off the tyres.
– Replace any missing valve caps as soon as possible.
– Mark the wheels before taking them off so that they rotate in the same direction when put back.
– When removed, the wheels or tyres should be stored in a cool, dry and preferably dark place.New tyres
New tyres do not give maximum grip straight away and should
therefore be “run in” by driving carefully and at moderate speeds for
about the first 500 km. This will al so help to make the tyres last
longer.
The tread depth of new tyres may vary, according to the type and
make of tyre and the tread pattern. Concealed damage
Damage to tyres and rims is often not readily visible. If you notice
unusual
vibration or the car pulling to one side , this may indicate
that one of the tyres is damaged. Reduce speed immediately if there
is any reason to suspect that damage may have occurred. Inspect
the tyres for damage. If no external damage is visible, drive slowly
and carefully to the nearest qualified workshop and have the car
inspected.
Tyres with directional tread pattern
An arrow on the tyre sidewall indicates the direction of rotation on
tyres with directional tread. Always note the direction of rotation
indicated when mounting the wheel. This guarantees optimum grip
and helps to avoid aquaplaning, excessive noise and wear.
Tyre service life
Correct inflation pressures and sensible driving habits
will increase the service life of your tyres.– Check the tyre pressures at least once a month.
Fig. 231 Open driver's
door (LHD vehicle) with
sticker listing tyre
inflation pressures
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Page 257 of 313

AUDI A5 COUPE 2008 Owners Manual Self-help255
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Applies to vehicles: with fire extinguisherFire extinguisherThe factory-fitted fire extinguisher is located in th

Page 296 of 313

AUDI A5 COUPE 2008 Owners Manual General notes
294Vehicle data sticker
The vehicle data sticker ⇒ page 293, fig. 285 is located near the
battery in the luggage compartment. One section of the vehicle data
sticker is attached to t

Page 297 of 313

AUDI A5 COUPE 2008 Owners Manual Performance, weights and dimensions295
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Performance, weights and dimensionsPetrol enginesA5 3.2 FSIEngine data
Performance figu

Page 298 of 313

AUDI A5 COUPE 2008 Owners Manual Performance, weights and dimensions
296A5 3.2 FSI quattroEngine data
Performance figures
Weights
Maximum trailer weights
2)
Engine oil
MG = manual gearbox1) With slight loss of power2) The specified t

Page 299 of 313

AUDI A5 COUPE 2008 Owners Manual Performance, weights and dimensions297
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Diesel enginesA5 2.7 TDIEngine data
Performance figures
Weights
Maximum trailer weights

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