2008 AUDI A4 AVANT radiator

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not available, do not use a different additive. Use plain water
instead until you can get the correct additive and can restore the
correct ratio. This should be done as soon as possible.
If you have lost a considerable amount of coolant, then you should
add cold antifreeze and cold water only when the engine is cold .
Always use
new engine coolant when refilling.
Do not fill coolant above the "MAX" mark. Excess coolant will be
forced out through the pressure relief valve in the cap when the engine becomes hot.
& WARNING
• The cooling system is under pressure and can get very hot.
Reduce the risk of scalding from hot coolant by following these
steps.
-Turn off the engine and allow it to cool down.
-Protect your face, hands and arms from escaping fluid and
steam by covering the cap with a large, thick rag.
- Turn the cap slowly and very carefully in a counter-clockwise
direction while applying light, downward pressure on the top
of the cap.
- To avoid being burned, do not spill antifreeze or coolant on
the exhaust system or hot engine parts. Under certain condi­
tions, the ethylene glycol in engine coolant can catch fire .
• Antifreeze is poisonous. Always store antifreeze in its original
container and well out of the reach of children.
• If you drain the coolant, it must be caught and safely stored in
a proper container clearly marked
"poison".
0 Note
• Coolant pollutes the environment and could cause an engine
fire. Excess coolant will be forced out through the pressure relief
valve in the cap when the engine becomes hot. •
If, in an emergency , only water can be added, the correct ratio
between water and antifreeze=>
page 280 must be restored as soon
as possible.
~ For the sake of the environment
Drained coolant should not be reused . Always dispose of used
coolant while observing all environmental regulations.•
Radiator fan
The radiator fan switches on automatically by itself.
The radiator fan is driven by the engine via the V -belt. The viscous
clutch regulates the speed of the fan according to the temperature
of the coolant.
An auxiliary electric radiator fan* switches on and off depending on
coolant temperature and other vehicle operating conditions .
After you switch the engine off, the auxiliary fan can continue
running for up to 10 minutes -even with the ignition off. It can even
switch on again later by
itself =>& , if
• the temperature of the engine coolant rises due to the heat
build-up from the engine in the engine compartment, or
• the engine compartment heats up because the vehicle is parked
in intense sunlight .
& WARNING
• To reduce the risk of personal injury never touch the radiator
fan.
• The auxiliary electric fan is temperature controlled and can
switch on suddenly even when the engine is not running .
• The auxiliary radiator fan switches on automatically when the
engine coolant reaches a certain temperature and will continue to
run until the coolant temperature drops. •
Vehicle care

Fuses and bulbs -
----------------
0 Note No. Equipment Amps
• On no account should fuses be repaired (e.g. patched up with tin 13 Steering column module 10
foil or wire) as this may cause serious damage elsewhere in the elec -14 Brake lights 10
trical circuit or cause fire.
15 Instrument cluster, Navigation system 10
• If a fuse blows repeatedly, do not keep replacing it. Instead, have
the cause for the repeated short circuit or overload tracked and Garage door opener
5
fixed.
•
Level, tire pressure control, park assist,
17 light/rain sensor 10
Fuse list Automatic headlight range control, left 5
Fuses which can be replaced. 19 Fog lights, rear fog light 15
20
Not used
No. Equipment Amps
21 Not used
1 Air conditioner 10 Front doors 15
2
Footwell illumination 5 23 Rear doors 15
3 Heated washer jets 5 Central convenience electrical system 20
4 Radiator fan 5 25 Heater blower 30
5
Telephone, oil level sensor, multifunction 10 26 Rear window defogger 30
switch, rear heated Seat, shift gate
27 Socket for trailer towing (controller) 30
6
Air conditioner (air quality sensor), air pressure 5 28 Fuel pump 20 sensor
Electronic Stabilization Program (ESP), brake
29 Not used
7 light switch, clutch pedal switch, steering angle 10 Power sunroof 20
sensor Automatic transmission, mirror dimming, diag-
31 15 8 Telephone 5 nosis socket
9 Brake booster (vacuum pump) 15 Towing assembly 15
10
Automatic headlight beam adjustment, auto -5 33 Cigarette
lighter 20
matic headlight range control, right
Electrical socket 20
11
Airbag 5 35 Luggage compartment socket 20
12
Diagnosis socket 10 Windshield wiper system 30
Do -it -yourself service

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W For the sake of the environm ent
By regularly ma intain ing your vehicle, you help make sure that emis ­
sion standards are maintained, thus minimizing adve rse effects on
the e nv ironment. •
Important considerations for you and your
vehicle
T he increasing use of elec tronics, sophisticated fue l injection and
emission con trol systems, and t he gene rally increasing tec hn ical
complexity of today's automobiles, have steadily reduced the scope
of maintenance and repai rs which can be carried ou t by vehic le
owners.
Also , safety and environmental concerns p lace very strict
limits on the nature of repairs and adjustments to engine and trans ­
m iss ion parts whic h an owne r can perform.
Maintenance , adjustments and repairs usua lly require special tools ,
t es ting dev ices a nd othe r eq uipment availab le to s pec ial ly t rai ned
workshop personne l in order to assure proper performance , reli ­
abil ity and safe ty of the vehicle and its many sy stems .
Im proper maintena nce, adjustments and repairs can impa ir the
operation and reliability of your vehicle and even void your vehicle
wa rranty. T here fore, proof o f servic ing in acc orda nce with the main­
tenance schedule may be a condition for upholding a possib le
warranty cla im made with in t he war ran ty per iod .
Above all, operationa l safety can be adversely affected, creating
unnecessary risks for you and your passengers.
I f in doubt about any servicing, have it do ne by your auth orized Audi
dea ler or any other properly equipped and qua lified workshop . We
str ongly u rge y ou to give yo ur auth orized Au di d ealer the oppo rtu ­
n ity to perform all scheduled maintenance and necessary repairs .
Yo ur dealer has the faci lit ies, origi nal par ts an d trained specia lis ts
to keep your vehic le running proper ly.
Controls and equip­ ment Safety first
Vehicle operation
Performing limited maintenan ce yourself
The following pages des cribe a li mi ted numbe r of proced ures wh ic h
can be performed on your vehicle with ordinary tools, should the
need a rise a nd trained pers onnel be unavaila ble. Before perfo rm ing
any of these procedures, a lways t horoughly read all o f the app li­
cable text and carefu lly fo llow the instructions given. Always rigor ­
ously observe the
WARNINGS provided.
Before you check anything in the engine compartment , always read
and heed all
WARNINGS ~ & and~ & in "Wo rking i n th e engine
compartment" on
page 273.
& WARNING
• Serious personal injury may occur as a result of improperly
performed maintenance , adjustments or repairs .
• Always be e xtremely careful when working on the veh icle .
Always follow commonly accepted safety practice s and general
common sense . Never risk personal injury .
• Do not attempt any of the maintenance, checks or repairs
described on the following pages if you are not fully familiar with
the se or other procedures with respect to the vehicle , or are uncer ­
tain how to pro ceed .
• Do not do any work without the proper tools and equipment .
Have the necessary work done by your authorized Audi dealer or
another properly equipped and qualified work shop .
• The engine compartment of any motor vehicle is a potentially
hazardous area . Never reach into the area around or touch the
radiator fan . It is temperature controlled and can switch on
s uddenly -even when the engine is off and the ignition key has
been removed . The radiator fan swit ches on automat ically when
the coolant reaches a certain temperature and will continue to run
until the coolant temperature drops .
• Alway s remove the ignition key before anyone gets under the
vehi cle .
.,_
Vehicle care Do-it-yourself service Technical data

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Starting .. .. .. ...... .... .... 135, 136
Starting with jumper cables ... .... 330
Stopping . .... .... .... ... .... ... 137
Engine compartment ... .. .... .... ... 274
Safety instructions . . . . . . . . . . . . . . . 273
Working the engine compartment .. 273
Engine coolant system . ...... ...... . 280
Adding coolant .. ...... .......... 282
Checking coo lant leve l .. .. .... .... 281
Checking the engine coo lant leve l .. 281
Radiator fan . . . . . . . . . . . . . . . . . . . . . 283
Engine coolant temperature Gauge ...... ...... .... ........... 13
Engine cooling system Ma lfunction .. .... ..... .. .... .... . 31
Engine data ...... .... .... .......... 343
Engine hood Closing . ...... ..... .. .... ...... . 273
How to release the hood . . . . . . . . . . 272
Engine oil ...... .... .... .... ... .... 275
Adding ... .... ... .... .... ...... . 278
Additives . . . . . . . . . . . . . . . . . . . . . . . 278
Changing ... .. .... .... ...... .... 279
Checking the engine oi l level .. .... . 277
Indications and conditions requiring extra
checking ..... .. .... .... ... .... 277
Oil consumption .. .... .... ... .... 277
Oil grades . . . . . . . . . . . . . . . . . . . . . . . 275
Recommended o il check interva ls .. 277
Specification and viscosity . . . . . . . . 275
Engine oil level .. .... .... .... ... .... . 34
Engine oil pressure Malfunction ...... ..... .. .... .... . 32 Engine oil sensor defective
....... .... . 34
Environment Break -in period .. ...... .... .... .. 243
Catalytic converter .. ...... .... ... 244
Disposing of your vehicle battery ... 291
Driving at high speeds .. .... .... .. 245
Driving to minimize pollution and noise . 245
Fuel ... ...... .... ... .. .... .... .. 269
Fuel economy ....... ...... .... .. 245
Leaks under your vehicle ... .... ... 273
Letting the vehicle stand and warm up .. 246
Proper disposa l of drained brake fluid
284
Proper disposal of drained engine
coo lant ...... ............. ..... 282
Proper disposa l of drained engine oil
278 ,279
Recycling used eng ine oil .. .... ... 278
Un leaded fuel ..... .... ... .... ... 267
What should I do with an old battery?
291
EPC
See Electronic power control .. ... .. . 23
ESP
See Electronic stabi ll ization program
(ESP) . ... .... .... ........ ... 22, 236
Event Data Recorder (EDR) .. ....... .. 236
Expansion tank .. .... ... .... .... .... 281
F
Fahrenheit
Switching between Fahrenheit and Centigrade . ...... .... ...... .... 128
Fan Adjusting the fan speed .. ...... ... 129
Climate controls ................. 129
Radiator ...... .... .... ...... .... 283
Fastening eyes ... .... .... .... .... .. 108
Flat tire ............................. 50
Changing .. .... .... ... .... .... .. 318
Flat tire changing .. ...... .... .... .... 50
Floor mats .. ... ... .... .... .... .... . 172
Fog lights ........................... 76
Fo lding master key with remote control . 52
Foot pedals .. .. .. .... .... .... ...... 17 2
For the sake of the environment Gaso line fumes and the environment 269
Letting your engine warm up ....... 136
Reducing engine noise by early upshifting .... .... ... .... .... ... 13
Reducing engine noise by upshift ing
early . .... .... .... ... .... .... ... 13
Refueling .... .... .... ....... .... 269
Saving fuel by early upshifting . .... . 13
Saving fuel by upshifting early .. .... 13
Using the rear window defogger 131, 132
Front airbags
Description . .... .... ... .... .... .. 191
How they work .. .... ... .... .... .. 196
Front ashtray . . . . . . . . . . . . . . . . . . . . . . . 119
Front fog lights .... .... .... .... .... .. 76

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Parking brake warning ..... .. .... .... . 29
Parking l ight
Defective . . . . . . . . . . . . . . . . . . . . . . . . 35
Park ing on a dec line (downhil l) ....... 138
Parking on an incline (uphill) ..... .... 138
Parktronic
See acoustic park assist . . . . . . . . . . . 139
Parts replacement . . . . . . . . . . . . . . . . . . 348
PASSENGER AIR BAG OFF light ........ 199
Passive safety system . . . . . . . . . . . . . . . 166
Pedals ............................ 172
Physical principles of a fronta l collision 177
Polishing . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Power locking switch . . . . . . . . . . . . . . . . . 59
Rear ............................ 60
Power locking system . . . . . . . . . . . . . . . . 55
Convenience close/open feature ..... 59
Locking and unlocking the vehicle from
inside ........... ....... .... .... 59
Opening and c losing the windows ... 59
Operating locks from with key .. .... 58
Rear lid . .... ... .. .... .... .... .... 61
Remote control . . . . . . . . . . . . . . . . 53, 56
Unlocking and locking vehicle ....... 56
Power locks
Power sunroof ..... .... .... .... ... 69
Pow er outlets . . . . . . . . . . . . . . . . . . . . . . 121
Power roof ........ .... ... .. .... ..... 67
Power seats Adjusting the seatback ............. 99
Adjustment ........... .... .... ... 97
Pow er steering . . . . . . . . . . . . . . . . . 135 , 241 Power
sunroof
Emergency closing ................ 69
Power window switche ·s . ...... .... ... 65
In the driver's door ... .... ... .. .... 66
In the front passenger's door ....... 67
Reactivating the system ............ 67
Pregnant women Specia l considera tions when wearing a
safety belt . . . . . . . . . . . . . . . . . . . . . 183
Programming the Homelink® Universa l Re -
mote Contro l . . . . . . . . . . . . . . . . . . . 157
Prop er occupant seating positions .... 168
Proper safety be lt position . . . . . . . . . . . 182
P roper seating position
Front passenger . . . . . . . . . . . . . . . . . 169
Occupants . . . . . . . . . . . . . . . . . . . . . . 168
Rear passengers . . . . . . . . . . . . . . . . . 170
Protectiv e liner 113
a
Quartzclock ...... .... ........ ....... 14
quattro®
See All -whee l drive ............... 242
Question
R
What happens to unbelted occupants? ..
178
Why safety belts? . . . . . . . . . . . . . . . . 176
Radiator fan ...... ............. ..... 283
Radio Replacing ....................... 349 Rain sensor defective
... .. .... .... .... 34
Reading lights
Front ....... ...... .... ...... ..... 81
Rear .......................... 81, 82
Reararmrest . .... .... .... ....... ... 103
Rear ashtray ....................... 119
Rear fog lights .. ...... .... .... .... ... 76
Rear lid
Emergency un locking (on ly manually . 62
Locking/unlocking ............. .... 61
Rear light
Defective ........ .... .... .... .... . 35
Rear power locking switch ... .. .... .... 60
Rear seat bench .. .... .... ..... .. ... 104
Rear view mirror Inside rear view mirror ............. 90
Rear window defogger .... .... .... ... 131
Rearview mirror
See Mirrors ....................... 90
Red symbols .. ........... .... .... ... 30
Refuel ling .......................... 269
Release lever for hood .... ........ ... 272
Remote control . . . . . . . . . . . . . . . . . . . 53, 56
Assigning a seat position .. .... .... 102
Resetting remote control ........... 57
Unlocking and locking ............. 56
Remote master key
Battery replacement ....... ....... . 53
Check light ................ ...... . 53
Remote rear lid release .... ...... ..... 63
Removing luggage compartment cover/parti -
tion net ...... .... .... .... .... . 111