2008 AUDI A4 open bonnet

Checking and topping up fluids 254Checking and topping up fluidsBonnetReleasing the bonnet
The bonnet is released from inside the vehicle.– Open the driver's door.
– Pull the lever under the dashboard in the direction indi-
cated (arrow) ⇒fig. 250.The bonnet springs out of its lock.
Opening the bonnetBefore opening the bonnet make sure that the windscreen
wiper arms are not lifted away from the glass. Otherwise the
paint may get damaged.
– Lift the bonnet slightly ⇒.
– Press the release catch under the bonnet upwards
⇒fig. 251. This will release the arrester hook.
– Open the bonnet.The bonnet is held open by two gas-filled struts.
WARNING
To avoid the risk of being scalded, never open the bonnet if you see
steam or coolant escaping from the engine compartment. Wait
until no steam or coolant can be seen before opening the bonnet.
Fig. 250 Detail of foot-
well on driver's side:
Release lever
Fig. 251 Release catch
under the bonnet
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Checking and topping up fluids259
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Applies to vehicles: without oil dipstickChecking the oil level (without dipstick)
You can check the engine oil level via the sound system or
MMI*.– Select: Function selector button > Oil level.
– Park your vehicle on a level surface.
– Allow the warm engine to run briefly at idling speed and
then switch off the ignition.
– Wait approx. 2 minutes.
– Read off the oil level on the display ⇒fig. 255. Top up the
engine oil if the bar in the oil level display is near the
“min” mark ⇒page 259.Depending on how you drive and the conditions in which the car is
used, oil consumption can be up to 0.5 ltr./1000 km. Oil consump-
tion is likely to be higher for the first 5000 km.
Note
The oil level display is intended solely for information purposes. An
oil level warning will appear in the instrument cluster if the oil level
is too low. Add more oil ⇒page 259. If the bonnet has been opened, the current oil level will be shown in the instrument cluster the next
time the ignition is switched on.
Topping up the engine oil

–Unscrew cap

from oil filler opening ⇒fig. 256.
– Carefully put in the specified grade of oil ⇒page 323
0.5 litres at a time.
– Check the oil level again after two minutes by calling up
the sound system or MMI* display or using the oil
dipstick ⇒page 258.
– If the oil level is too low, add more engine oil.
– Replace the oil filler cap carefully and push the dipstick
all the way in (on vehicles with dipstick).
WARNING
•
Ensure that no oil comes into contact with hot engine compo-
nents when topping up: this could cause a fire.
•
Wash your skin thoroughly if it comes into contact with engine
oil.
Fig. 255 Display: Oil
level
CAR
Fig. 256 Engine
compartment: Engine
oil filler cap
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Checking and topping up fluids265
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data charges) when handling cables and electrical equipment. Never
cross the battery poles. The resulting high-energy sparks can
cause injury.
•
A highly explosive mixture of gases is given off when the
battery is under charge. Only charge battery in a well ventilated
area.
•
Keep children away from the battery and battery acid.
•
Switch off all electrical equipment before starting any work on
the vehicle electrical system. Remove the ignition key. The minus
cable of the battery must be disconnected. When changing a light
bulb, it is sufficient to only turn off the light.
•
Before disconnecting the battery, turn off the anti-theft
system! Otherwise, the alarm will sound.
•
When disconnecting the battery from the vehicle's electrical
system, first disconnect the minus cable and then the plus cable.
•
Before reconnecting the battery, turn off all electrical equip-
ment. First connect the plus cable, then the minus cable. The
battery cables must not be connected to the wrong battery poles
- serious risk of cable fire.
•
Never charge a frozen or thawed out battery - risk of explosion
and chemical burns! A battery must be replaced once it has been
frozen. When it is discharged the battery can freeze at tempera-
tures around 0°C.
•
Make sure that the vapour hose is always attached to the
battery.
•
Never use a damaged battery - risk of explosion! Replace a
damaged battery immediately.Caution
•
Never disconnect the car's battery with the engine running or
with the ignition turned on, otherwise the electrical system or elec-
trical components will be damaged.
•
Do not expose the battery to direct sunlight over a long period of
time, as the intense ultraviolet radiation can affect the battery
housing.
•
If the car is left standing for long periods, protect the battery
from extreme cold temperature so that it does not “freeze up” and
become damaged.
Charging the battery
Terminals for charging the battery are fitted in the engine
compartment.– Note the warnings ⇒ in “Important safety warnings
for handling a car battery” on page 264 and ⇒.
– Switch off all electrical equipment. Remove the ignition
key.
– Open the bonnet ⇒page 254.
– Open the red cap on the positive terminal ⇒fig. 259.
– Follow the correct procedure for connecting the charger
cables to the jump-start terminals (terminal with red cap
= “positive”, terminal with hexagon = “negative”).
WARNING (continued)
Fig. 259 Engine
compartment: Termi-
nals for jump leads and
battery charger
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Checking and topping up fluids 266
– Now connect the battery charger to the mains and switch
on.
– After charging the battery: switch off the battery charger
and disconnect the mains cable.
– Now disconnect the charger cables.
– Refit the red cap onto the positive terminal.
– Close the bonnet ⇒page 256.When it is discharged the battery can freeze at temperatures
around 0°C. A frozen battery must be thawed before charging ⇒.
However, it is advisable to replace the battery if it has frozen,
because the ice can crack the battery casing and allow the battery
acid to escape.
Charging the battery
Important: Before you charge the battery make sure you read the
manufacturer's instructions for using the battery charger.
When charging with a low current (for instance with a small battery
charger) the battery does not have to be disconnected. The battery
must not be opened while you are charging it.
Fast-charging the battery
For technical reasons it is not permissible to fast-charge the battery
using charging devices with an output voltage higher than 14.8 V.
WARNING
Never charge a frozen battery – it could explode.
Note
Use only the terminals in the engine compartment to charge the
battery.
Replacing 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 226.
The power management function ensures that the battery is
charged much more efficiently than on vehicles without a power
management system. For this additional power to be available after
replacing the battery, we recommend 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 the same capacity, voltage (12 V)
and current rating. It must also have the same dimensions as the
original, factory-fitted battery and 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 264, “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 household waste. Make sure the battery
removed from the vehicle cannot tip over. Otherwise, sulphuric acid
could escape.
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Fuses and bulbs 306Bulb holders with a bayonet fastenerIn the case of bulb holders with a bayonet fastener please
proceed as follows:
Removing the bulb holder
– Turn the bulb holder in the direction of the arrow
⇒fig. 287 as far as it will go and then take the bulb
holder out of the light unit.
Fitting the bulb holder
– Insert the bulb holder into the light unit, making sure you
keep the bulb holder straight, i.e. the rubber seal makes
even contact all around.
– Turn the bulb holder in the direction indicated by the
arrow ⇒fig. 287 as far as it will go.
Changing bulbs for headlightsRemoving and installing headlightsThe description for removing the headlight refers to the left
headlight; in principle the same procedure applies to the
right headlight.
Removing
– Switch off the ignition and the lights.
– Open the bonnet.
Fig. 287 Diagram: Bulb
holder with a bayonet
fastener
AA
AB
Fig. 288 Trim panel:
Attachment points are
marked by arrowsFig. 289 Headlight
unit: Attachment
points are marked by
arrows
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Index331
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data Automatic air conditioner plus
SeeDeluxe automatic air conditioner plus
101
Automatic cruise control
Seeadaptive cruise control . . . . . . . . 128
Automatic gearbox
Dynamic gear control program . . . . . 166
Kick-down feature . . . . . . . . . . . . . . . . 165
Manual release (multitronic®) . . . . . . 168
multitronic® . . . . . . . . . . . . . . . . . . . . . 162
Paddle levers (tiptronic mode) . . . . . . 167
Safety interlock for ignition key . . . . . 116
Selector lever lock . . . . . . . . . . . . . . . . 165
Selector lever positions . . . . . . . . . . . 163
Steering wheel with paddle levers . . 167
tiptronic . . . . . . . . . . . . . . . . . . . . 162, 166
Automatic headlight control . . . . . . . . . . . 57
Automatic headlights . . . . . . . . . . . . . . . . . 59
Auxiliary heating
Deluxe automatic air conditioner plus . .
110
Description . . . . . . . . . . . . . . . . . . . . . . 110
Remote control . . . . . . . . . . . . . . . . . . 113
Running time . . . . . . . . . . . . . . . . . . . . 112
Switching on/off immediately . . . . . . 111
Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Average fuel consumption . . . . . . . . . . . . . 25
Average speed . . . . . . . . . . . . . . . . . . . . . . . 25
Axle weights
SeePerformance, weights and
dimensions . . . . . . . . . . . . . . . . . . . . 323
BBattery
Charging . . . . . . . . . . . . . . . . . . . . . . . . 265
Low charge . . . . . . . . . . . . . . . . . . . . . . 226
Power level . . . . . . . . . . . . . . . . . . . . . . 226
Power management . . . . . . . . . . . . . . 226
Replacing . . . . . . . . . . . . . . . . . . . . . . . 266
Winter conditions . . . . . . . . . . . . . . . . 263
Battery power . . . . . . . . . . . . . . . . . . . . . . . 38
Bayonet fastener
Bulb . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
Bulb holder . . . . . . . . . . . . . . . . . . . . . . 306
Belt tensioners . . . . . . . . . . . . . . . . . . . . . . 199
Bicycle rack
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Biodiesel . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Bioethanol fuel . . . . . . . . . . . . . . . . . . . . . 251
Blower
Deluxe automatic air conditioner . . . . . 96
Deluxe automatic air conditioner plus . .
104
Bonnet
Closing . . . . . . . . . . . . . . . . . . . . . . . . . 256
Opening . . . . . . . . . . . . . . . . . . . . . . . . 254
Releasing . . . . . . . . . . . . . . . . . . . . . . . 254
Boot
SeeLoading luggage compartment . 192
SeeLuggage compartment . . . . . . . . . . 79
Boot lid
Central locking system . . . . . . . . . . . . . 51
Manual release . . . . . . . . . . . . . . . . . . . . 52Brake system
Brake assist system . . . . . . . . . . . . . . . 222
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . 262
Brake light defective . . . . . . . . . . . . . . . 37
Brake pads worn . . . . . . . . . . . . . . . . . . 37
Brake servo . . . . . . . . . . . . . . . . . . . . . . 224
Electro-mechanical parking brake . . . 121
General notes . . . . . . . . . . . . . . . . . . . . 224
Malfunction . . . . . . . . . . . . . . . . . . . . . . 32
Warning lamp . . . . . . . . . . . . . . . . . . . . . 20
braking guard
SeeAudi braking guard . . . . . . . . . . . . 142
Bulb holder
Bayonet fastener . . . . . . . . . . . . . . . . . 306
Bulb monitor . . . . . . . . . . . . . . . . . . . . . . . . 37
Bulbs
Bayonet fastener . . . . . . . . . . . . . . . . . 305
Changing (general notes) . . . . . . . . . . 304
Bulbs, changing . . . . . . . . . . . . . . . . . . . . . 304
Brake lights . . . . . . . . . . . . . . . . . . . . . . 311
Bulb holder with bayonet fastener . 305,
306
Dipped headlights . . . . . . . . . . . . . . . . 308
Front fog lights . . . . . . . . . . . . . . . . . . . 310
Main beam headlights . . . . . . . . . . . . . 307
Number plate light . . . . . . . . . . . . . . . . 315
Rear fog light . . . . . . . . . . . . . . . . . . . . 314
Rear lights . . . . . . . . . . . . . . . . . . . . . . . 311
Reversing light . . . . . . . . . . . . . . . . . . . 314
Turn signals (rear) . . . . . . . . . . . . . . . . 311
Business equipment . . . . . . . . . . . . . . . . . 278
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Index 332CCapacities . . . . . . . . . . . . . . . . . . . . . . . . . 321
Car keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Care of vehicle . . . . . . . . . . . . . . . . . . . . . 244
Catalytic converter . . . . . . . . . . . . . . . . . . 229
Central locking system . . . . . . . . . . . . . . . 42
Boot lid . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Deadlock mechanism . . . . . . . . . . . . . . 48
Fuel tank flap . . . . . . . . . . . . . . . . . . . . 252
Locking . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Locking and unlocking the vehicle from
inside . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Manual locking . . . . . . . . . . . . . . . . . . . 51
Opening and closing windows . . . . . . 54
Sun roof . . . . . . . . . . . . . . . . . . . . . . . . . 54
Switches on driver's door . . . . . . . . . . 49
Unlocking . . . . . . . . . . . . . . . . . . . . . . . . 48
Cetane number . . . . . . . . . . . . . . . . . . . . . 251
Changing a wheel . . . . . . . . . . . . . . . . . . . 288
Changing bulbs
SeeBulbs . . . . . . . . . . . . . . . . . . . . . . . 304
Chassis number . . . . . . . . . . . . . . . . . . . . 321
Child safety . . . . . . . . . . . . . . . . . . . . . . . . 210
Side airbags . . . . . . . . . . . . . . . . . . . . . 212
Child safety seat . . . . . . . . . . . . . . . . . . . . 213
Child seat categories . . . . . . . . . . . . . 213
Fitting . . . . . . . . . . . . . . . . . . . . . . . . . . 216
ISOFIX system . . . . . . . . . . . . . . . . . . . 218
On front passenger's seat . . . . . . . . . 211
Safety notes . . . . . . . . . . . . . . . . . . . . . 210
Child-proof catches
Rear doors . . . . . . . . . . . . . . . . . . . . . . . 53Cigarette lighter . . . . . . . . . . . . . . . . . . . . . 87
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
Cleaning Alcantara . . . . . . . . . . . . . . . . . . 250
Cleaning seat covers
Alcantara . . . . . . . . . . . . . . . . . . . . . . . 250
Natural leather . . . . . . . . . . . . . . . . . . 249
Textile covers . . . . . . . . . . . . . . . . . . . . 247
Cleaning textile covers and trim parts . . 247
Clock, setting . . . . . . . . . . . . . . . . . . . . . . . 13
Closing
Bonnet . . . . . . . . . . . . . . . . . . . . . . . . . 256
Sun roof . . . . . . . . . . . . . . . . . . . . . . . . . 55
Coat hooks . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Colour code . . . . . . . . . . . . . . . . . . . . . . . . 321
coming home . . . . . . . . . . . . . . . . . . . . . . . 59
Compact temporary spare wheel
SeeSpare wheel . . . . . . . . . . . . . . . . . 284
Compartment for (sun)glasses . . . . . . . . . 91
Compass in mirror . . . . . . . . . . . . . . . . . . . 71
Controls and displays
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Convenience open/close function . . . . . . 54
Cooling system
Anti-freeze additive . . . . . . . . . . . . . . . 260
Checking coolant level . . . . . . . . . . . . 261
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . 260
Coolant temperature gauge . . . . . . . . . 11
Malfunction . . . . . . . . . . . . . . . . . . . . . . 33
Radiator fan . . . . . . . . . . . . . . . . . . . . . 262
Topping up coolant . . . . . . . . . . . . . . . 261Cruise control system
Adjusting stored speed . . . . . . . . . . . 126
Indicator lamp . . . . . . . . . . . . . . . . . . . . 19
Pre-selecting a speed . . . . . . . . . . . . . 127
Switching off . . . . . . . . . . . . . . . . . . . . 127
Switching on . . . . . . . . . . . . . . . . . . . . 125
See alsoadaptive cruise control . . . . 128
Cup holders . . . . . . . . . . . . . . . . . . . . . . . . . 85
Current fuel consumption . . . . . . . . . . . . . 25
DDate display . . . . . . . . . . . . . . . . . . . . . . . . . 13
Daytime running lights . . . . . . . . . . . . . . . 59
DCP
SeeDynamic gear control program . 166
Deactivating front passenger's airbag . . 208
Deadlock mechanism . . . . . . . . . . . . . . 42, 48
Defrosting windows . . . . . . . . . . . . . . 98, 106
Deluxe automatic air conditioner . . . . . . . 93
Air distribution . . . . . . . . . . . . . . . . . . . 97
Air outlets . . . . . . . . . . . . . . . . . . . . . . . . 99
Air outlets for rear passengers . . . . . . 99
Air recirculation mode . . . . . . . . . . . . . 97
Automatic mode . . . . . . . . . . . . . . . . . . 95
Basic settings . . . . . . . . . . . . . . . . . . . . 100
Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Controls . . . . . . . . . . . . . . . . . . . . . . . . . 94
Defrosting . . . . . . . . . . . . . . . . . . . . . . . 98
Description . . . . . . . . . . . . . . . . . . . . . . . 93
Economical operation . . . . . . . . . . . . . 100
Heated rear window . . . . . . . . . . . . . . . 98
Seat heating, front . . . . . . . . . . . . . . . 114
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Index 334
Operation . . . . . . . . . . . . . . . . . . . . . . . 121
Parking . . . . . . . . . . . . . . . . . . . . . . . . . 122
Releasing and applying . . . . . . . . . . . 121
Warning lamp . . . . . . . . . . . . . . . . . 19, 20
Electronic differential lock
How the system works . . . . . . . . . . . . 222
Warning lamp . . . . . . . . . . . . . . . . . . . . 19
Electronic immobiliser . . . . . . . . . . . . . 14, 43
Electronic stabilisation program
How the system works . . . . . . . . . . . . 222
Warning lamp . . . . . . . . . . . . . . . . . . . . 17
Emergency braking function . . . . . . . . . . 123
Emergency key . . . . . . . . . . . . . . . . . . . . . . 45
Emergency release
Ignition key . . . . . . . . . . . . . . . . . . . . . . 46
Emission control systems
Catalytic converter . . . . . . . . . . . . . . . 229
Diesel particulate filter . . . . . . . . . . . . 229
Emissions . . . . . . . . . . . . . . . . . . . . . . . . . 321
Engine compartment
Safety notes . . . . . . . . . . . . . . . . . . . . . 255
Engine compartment layout . . . . . . . . . . 256
Engine data
SeePerformance, weights and
dimensions . . . . . . . . . . . . . . . . . . . . 323
Engine hood
SeeBonnet . . . . . . . . . . . . . . . . . . . . . . 254
Engine management
(EPC) warning lamp . . . . . . . . . . . . . . . 16
Engine oil . . . . . . . . . . . . . . . . . . . . . . 34, 257
Checking oil level . . . . . . . . . . . . 258, 259
Consumption . . . . . . . . . . . . . . . . 258, 259
LongLife Service . . . . . . . . . . . . . . . . . 257Topping up . . . . . . . . . . . . . . . . . . . . . . 259
See alsoPerformance, weights and
dimensions . . . . . . . . . . . . . . . . . . . . 323
Engine oil capacity
SeePerformance, weights and
dimensions . . . . . . . . . . . . . . . . . . . . 323
Engine oil pressure
Warning lamp . . . . . . . . . . . . . . . . . . . . 33
Engine oil sensor
Malfunction . . . . . . . . . . . . . . . . . . . . . . 38
Environmental compatibility . . . . . . . . . . 231
Environmental tips
Filling the tank . . . . . . . . . . . . . . . . . . . 252
Heated rear window . . . . . . . . . . . 98, 106
Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
Roof carrier . . . . . . . . . . . . . . . . . . . . . . 84
EPC
SeeEngine management . . . . . . . . . . . 16
ESP
SeeElectronic stabilisation program . 17
Ethanol fuel . . . . . . . . . . . . . . . . . . . . . . . . 251
Exterior mirrors . . . . . . . . . . . . . . . . . . . . . . 70
FFastening rings . . . . . . . . . . . . . . . . . . 79, 193
Filling the tank . . . . . . . . . . . . . . . . . . . . . 252
Releasing the tank flap manually . . . 253
Fire extinguisher . . . . . . . . . . . . . . . . . . . . 283
First-aid kit . . . . . . . . . . . . . . . . . . . . . . . . . 282
Floor mats . . . . . . . . . . . . . . . . . . . . . 191, 192
Fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Four-wheel drive . . . . . . . . . . . . . . . . . . . . 226Front passenger
SeeSitting position . . . . . . . . . . . . . . . 189
Fuel
Biodiesel . . . . . . . . . . . . . . . . . . . . . . . . 251
Capacity . . . . . . . . . . . . . . . . . . . . . . . . 321
Consumption . . . . . . . . . . . . . . . . . . . . 321
Current fuel consumption . . . . . . . . . . 25
Diesel . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Ethanol . . . . . . . . . . . . . . . . . . . . . . . . . 251
Fuel level low . . . . . . . . . . . . . . . . . . . . . 37
Petrol . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Saving fuel . . . . . . . . . . . . . . . . . . . . . . 229
Fuel consumption . . . . . . . . . . . . . . . . . . . 321
Fuel range . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Fuel tank flap . . . . . . . . . . . . . . . . . . . . . . . 252
Fuse, changing . . . . . . . . . . . . . . . . . . . . . 300
GGarage door opener . . . . . . . . . . . . . . . . . 179
Gear-change indicator . . . . . . . . . . . . . . . . 22
Generator
SeeAlternator . . . . . . . . . . . . . . . . . . . . 32
Glove box . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Glow plug system
Indicator lamp . . . . . . . . . . . . . . . . . . . . 16HHandbrake
SeeElectro-mechanical parking brake . . .
121
document_0900452a81b1b9de.book Seite 334 Donnerstag, 26. Juli 2007 9:16 09