2008 AUDI A5 COUPE ECU

Checking and topping up fluids
242Replacing the battery
A replacement battery must have the same specifications
as the original equipment battery.Your vehicle is equipped with an intelligent power management
system to control the distribution of electrical energy ⇒page 202 .
The power management function ensures that the battery is
charged much more efficiently th an on vehicles without a power
management system. For this additional power to be available after
replacing the battery, we recommen d that the replacement battery
used is of the same make and type as the original-equipment
battery. The battery must be encoded in the control unit for power
management. This has to be done by a qualified workshop.
A replacement battery must have th e same capacity, voltage (12 V)
and current rating. It must also have the same dimensions as the
original, factory-fitted battery an d have sealed caps. The battery
must comply with the standards TL 825 06 (dated December 1997 or
later) and VW 7 50 73 (August 2001 or later).
Caution
•
Make sure that the vent hose is always attached to the opening
on the side of the battery. Gases or battery acid can otherwise
escape and possibly cause damage.
•
The battery holder and clamps must always be correctly secured.
•
Before starting any work on the battery, always observe the
warnings listed under ⇒page 240, “Important safety warnings for
handling a car battery”.For the sake of the environment
 Batteries contain toxic substances including sulphuric acid and
lead. They must be disposed of appropriately and must not be put
together with ordinary househol d waste. Make sure the battery
removed from the vehicle cannot tip over. Otherwise, sulphuric acid
could escape.
Windscreen washerPlain water on its own is not sufficient for the windscreen
washer system.The container for the windscreen washer
 contains the cleaning
fluid for the windscreen and the headlight washer system*
⇒ fig. 230. Container capacity: ⇒page 293 .
Plain water on its own is not enou gh to clean the glass properly. It
is therefore advisable to add a suitable washer fluid additive (with
wax solvent) to the water. A washer fluid with freeze-resistant addi-
tive should be used in winter.
Caution
•
Never put in radiator anti -freeze or other additives.
•
Never use washer fluid which contains paint thinners or solvents
as it can damage the paintwork.
Fig. 230 Engine
compartment: Wind-
screen washer
container
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Wheels and tyres247
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
replacement parts, trained personnel and facilities for disposing of
the old tyres.
WARNING
•
It is very important to ensure that the tyres you have chosen
have adequate clearance. When selecting replacement tyres, do
not rely entirely on the nominal tyre size marked on the tyre; with
some makes of tyre the effective tyre size can differ significantly
from the nominal dimensions, even though the tyres have the
same size designation. Inadequate tyre clearance can result in
damage to the tyres or the vehicle, causing a serious safety risk. It
may also invalidate the vehicle's type approval for use on public
roads.
•
Please ask your Audi dealer or qualified workshop whether run
flat tyres can be used on your ve hicle. Unauthorised use of these
tyres can invalidate the vehicle's type approval for use on public
roads. Furthermore, this could cause damage to your vehicle and
possibly also result in an accident.
•
Avoid running the car on tyres that are more than 6 years old.
If you have no alternative, you sh ould drive slowly and with extra
care at all times.For the sake of the environment
Old tyres must be disposed of according to the laws in the country
concerned.
Note
•
Never mount used tyres if you are not sure of their previous
history.
•
For technical reasons it is not normally possible to use wheel
rims from other vehicles. In some cases this also applies to rims
from other vehicles of the same model.
Wheel bolts
The wheel bolts are designed to suit the rims on your car.The wheel bolts are matched to the rims. When installing different
wheels (for instance wheels with winter tyres) it is important to use
the correct wheel bolts with the right length and correctly shaped
bolt heads. This is essential for the secure fit of the wheels and for
the proper function of the brake system.
Audi dealers have full information on the technical requirements
when installing or changing tyres, rims or wheel trims.
The wheel bolts should be clean and turn easily.
A special adapter is required to turn the anti-theft wheel bolts*
⇒ page 264 .Winter tyres
Winter tyres will significantly improve the car's handling
in winter road conditions.–Use only radial ply winter tyres.
– Winter tyres must be fitted on all four wheels.
– Only use winter tyres of the correct type approved for your vehicle.
– Please note that the maximum permissible speed for winter tyres may be lower than for summer tyres.
– Also note that winter tyres are no longer effective when the tread is worn down.
– After fitting the wheels you must always check the tyre pressures. The correct tyre pressures are listed on the
sticker on the end face of the driver's door.
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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 the foot-
well on the front passenger's side (secured in a holder).Taking out the fire extinguisher
– Unfasten the retaining strap by pressing on the tab
marked “PRESS” ⇒fig. 236 -arrow-.
– Take the fire extinguisher out of the holder.
Securing the fire extinguisher
– Place the fire extinguisher in the holder.
– Secure the fire extinguisher with the retaining strap.
After using the fire extinguisher
– Have the fire extinguisher refilled and checked by a qual- ified dealer or the fire service.Check how the fire extinguisher works before you need to use it. The
instructions for use are shown on the fire extinguisher. Have the fire extinguisher checked regularly (at least every two
years) by a qualified dealer or by the fire service to ensure that it will
be in working order when you need it.
When buying a new fire extinguisher, make sure it fits in the holder.
WARNING
If the fire extinguisher is not se
cured properly it could be cata-
pulted through the vehicle during driving and braking manoeuvres
or in the event of an accident. This poses a risk of injury to occu-
pants.
Note
•
The fire extinguisher must comply with legal requirements.
•
Observe the expiry date of the fire extinguisher. The fire extin-
guisher may not work properly after the expiry date.
Tools and Tyre Mobility SystemThe tools and the Tyre Mobility System are stored under
the floor panel in the luggage compartment.
Fig. 236 Fire extin-
guisher in footwell on
front passenger's side
Fig. 237 Luggage
compartment: Tools,
Tyre Mobility System
and jack
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Self-help
256If you need the tools, the Tyre Mobili ty System or the jack*, you will
have to open the floor panel and take out the spare wheel*
⇒ page 256 .
The tool kit includes:•
A hook for removing hub caps
•
Pin for mounting a wheel
•
Screwdriver with reversible blade
•
Tool for changing bulbs
•
Interchangeable socket (Torx socket for changing bulbs)
•
Crank handle for jack
•
Adapter for anti-theft wheel bolts*
•
Jack*
•
Box spanner for wheel bolts
•
Towline anchorage
Some of the parts listed are only fitted on certain models or are
optional extras.
Before stowing the jack* again, wind down the arm of the jack as far
as it will go.
WARNING
•
Do not use the hexagonal socket in the screwdriver handle to
tighten the wheel bolts. It is not po ssible to tighten the bolts with
the required torque – risk of accident.
•
The jack supplied by the factor y is only designed for changing
wheels on this model. On no account attempt to use it for lifting
heavier vehicles or other loads – risk of injury.
•
Never start the engine when the vehicle is on the jack - risk of
accident.
•
If work has to be done under the ve h i cl e , e n su re t h a t i t is sa fe l y
supported on stands designed for th e purpose, otherwise there is
a risk of injury.
Applies to vehicles: with compact temporary spare wheelCompact temporary spare wheel*The spare wheel is carried in the wheel well under the
floor panel in the luggage compartment. It is only
intended for temporary use over short distances.Taking out the spare wheel
– Lift the floor panel by the plastic handle ⇒fig. 238.
– Hook the handle onto the luggage compartment weath- erstrip.
– Turn the centre plastic knob ⇒ fig. 238 anti-clockwise.
– Take out the spare wheel.
– Unhook the floor panel before closing the boot lid.
Securing the defective wheel in the spare wheel
well
– Place the wheel in the spare wheel well and secure it with the plastic knob.
– Unhook the floor panel before closing the boot lid.
Fig. 238 Spare wheel
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Self-help261
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
–Loosen the wheel bolts ⇒ page 261 .
– Raise the car with the jack* ⇒page 262 .
– Ta k e o f f the wheel with the flat tyre and then put on the
spare wheel* ⇒page 263 .
– Lower the vehicle to the ground.
– Tighten the wheel bolts firmly i n d i a g o n a l s e qu e n c e w i t h
the box spanner ⇒page 261 .
–Fit the hub cap back on.After changing a wheel
What you must do after changing a wheel.– Place the wheel with the defective tyre in the spare wheel
well and secure it.
– Put the tools and the jack* back in the luggage compart- ment.
–The inflation pressure of the newly fitted spare tyre must
be checked as soon as possible.
–Have the tightening torque of the wheel bolts checked as
soon as possible with a torque wrench. The correct tight-
ening torque is 120 Nm.
– Have the flat tyre replaced as quickly as possible.
Note•
If you notice that the wheel bolts are corroded and difficult to
turn when changing a wheel, they must be replaced before having
the tightening torque checked.
•
In the interest of safety, drive at moderate speeds until the tight-
ening torque of the wheel bolts has been checked.
Hub caps
The hub caps must be remo ved for access to the wheel
bolts.Removing
– Insert the hook (provided in the vehicle's tool kit) in the
hole in the hub cap.
–Pull off the hub cap ⇒fig. 241.Loosening and tighten ing the wheel bolts
The wheel bolts must be loosened before raising the
vehicle.
Fig. 241 Changing a
wheel: Removing a hub
capFig. 242 Changing a
wheel: Loosening
wheel bolts
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Self-help263
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
– Now fit the crank handle onto the jack by inserting it
in the opening on the knob ⇒page 262, fig. 244. Turn the
crank handle clockwise or anti-clockwise to secure it in
place.
– Raise the vehicle by windin g the crank handle until the
defective wheel is clear of the ground.Recesses at the front and rear of the door sills mark the jacking
points ⇒page 262, fig. 243. There is one jacking point for each
wheel. The distance from the jacking points to the wheel arches is
approximately 20 cm at the front an d 40 cm at the rear. The jack may
only be applied at the seam of the jacking points shown.
An unstable surface under the jack may cause the vehicle to slip off
the jack. Always provide a firm base for the jack on the ground. If
necessary use a large, strong board or similar support. On a hard,
slippery surface (such as tiles) use a rubber mat or similar to prevent
the jack from slipping.
WARNING
•
Prevent the base of the jack fr om slipping – risk of injury.
•
The car can be damaged if the jack is not applied at the correct
jacking points. There is also a risk of injury since the jack can slip
off suddenly if it is not properly engaged.
Taking off the wheel and putting on the spare wheel
Step-by-step instructions for taking off the wheel and
putting on the spare wheel.Change the wheel as described below after loosening the
wheel bolts and raising the vehicle with the jack*.
Taking off the wheel
–Using the hexagonal socket in the screwdriver handle
(provided in the vehicle's tool kit) ⇒fig. 245, unscrew the
wheel bolt nearest to the top and place the bolt on a
clean surface.
AD
Fig. 245 Changing a
wheel: Hexagonal
socket in screwdriver
handle to turn the
wheel bolts after they
have been loosenedFig. 246 Changing a
wheel: Mounting pin in
wheel bolt hole nearest
to the top
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Fuses and bulbs279
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
– Take the screwdriver and the interchangeable Torx socket
out of the vehicle tool kit.
– Remove the screws ⇒page 278, fig. 258 that secure the
trim panel to the lock carrier and detach the trim panel.
– Slacken the two screws that secure the headlight to the lock carrier and the screw at the underside of the head-
light (this screw is located between the cover and the
rubber cap and should not be slackened more than ten
turns) ⇒page 278, fig. 259.
– Carefully pull the headlight forward about 60 mm.
– Release and unplug th e electrical connector.
– Carefully take the headlight out towards the front (swivel it slightly if necessary).
Installing
– Perform all of the above steps in reverse sequence.The headlight must be inserted in two guides (on the underside of
the headlight). This is the only w ay to ensure that the headlight is
installed in the correct position. To determine whether the headlight
is correctly installed, check that it is aligned flush with adjacent
body parts (such as the wing panel).
Do not interchange the securing screws.
Caution
Please take particular care not to damage or scratch the adjacent
parts of the body when removing or installing the headlights.
Applies to vehicles: with halogen main beam headlightsRemoving bulb for main beam headlights– Remove the headlight ⇒page 278 .
– Take off the rubber cap ⇒fig. 260 ⇒ in “Changing
bulbs” on page 276.
– Press the connector in the direction of the arrow ⇒fig. 261.
– Remove the connector together with the bulb from the headlight housing.
– Disconnect the connector from the base of the bulb ⇒ in “Changing bulbs” on page 276.
Fig. 260 Headlight
unit: Rubber cap is
highlightedFig. 261 Bulb holder
for main beam head-
lights
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Fuses and bulbs
280Applies to vehicles: with halogen main beam headlightsInstalling the bulb for the main beam headlights
When installing a bulb, the lug on the base of the bulb
must be inserted into the appropriate mounting on the
bulb housing.– Attach the new bulb to the connector ⇒ in “Changing
bulbs” on page 276.
– Insert the bulb carefully into the bulb housing. Start by placing the base of the bulb directly behind one of the
retaining hooks so that the lug fits into the recess on the
bulb housing. – Press the connector in the direction of the arrow
⇒fig. 263 until the bulb engages.
– Check that the bulb is securely seated in the bulb housing.
– Fit the rubber cap and install the headlight ⇒page 278 .
– Check whether the new bulb is working.
– Have the headlight settings checked.
Note
Ensure that the rubber cap is seated correctly so that no water can
enter the unit.Applies to vehicles: with halogen dipped headlightsRemoving bulb for dipped headlights
Fig. 262 Bulb with
connector: The lug on
the base of the bulb is
highlightedFig. 263 Fitting bulb
for main beam head-
lights
Fig. 264 Headlight
unit: Cover
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