2009 AUDI A4 CABRIOLET brake light

Cleaning and protection 1111111
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•
Ap plies t o vehi cles : wi th C ast allo y wh eels
Cast (light) alloy wheels
Cast (light) alloy wheels require special care .
-Wash the wheels w ith a sponge or hose brush every
other week .
- For deep cleaning after wards, use on ly a dedicated
acid ­
free cast alloy wheel c leaner .
- Rub a co at of
liquid wax onto t he rims every three m onth.
Be sure t o reach and tre at all parts of the rim .
To preserve the decorative appearance of the cas t alloy whee ls,
some special care is necessary . In addition to road dirt and salt,
brake du st is also corr osive. If left on f or to o long, brake dust can
cause pitting .
U se only specia l
acid-free cleaners formulated for alloy rims. Safe
p roducts are available at your Aud i dea ler . N ever leave the cleaner
on the rims longer than specified on the label. If not rinsed off
promp tly, the acid conta ined in so me cleaners can attack the
threads on the wheel bolts .
Never use abrasive or metal po lishing cleaning agents . If the protec­
tive coating has been chipped, e .g. by kicked up road dirt, touch it
up as soon as possib le .
& WARNING
• Moisture and ice on br akes may affect braking efficiency
=> page 215 , "General infor mation ". Te st the br ake s c arefully ea ch
time you wash the vehicle .
• Alw ay s read and heed all WARNINGS and ot her informat ion
=> page 2 30 . •
Body cavity sealing
T he body c avity seali ng does not need to be checke d.
A ll body cavities which could be affected by corrosion have been
given thorough protecti on a t the fact ory.
This sealing does not require any inspection or add itional treat ­
ment . If any wax shou ld seep out of the cavity when the ambient
temperature is high, it can be removed with a p lastic scraper and a
suitable solvent.
& WARNING
Solvents can be dangerous.
• Benz ine is fla mmable and to xic. If you use benz ine for removing
the wax, keep sparks, flame and lighted cigarettes away . Never
dump benz ine on the ground , into open stream s or do wn sewage
drains .
• Be sure to ob ser ve all safety and environmental regulations .
Follow all in structions on the container.
• Always read and heed all WARNINGS and the information
=> page 230. •
Chassis
Have the undercoating checked for damage from time to
time.
The lower body she ll of your Audi is a lso thoroughly pro tected
against corrosion.
Any damage to the u nde rcoating caused by road ha za rds sh ould be
repaired promptly .
& WARNING
Too much undercoating in the wrong pla ces can cause a f ire .
Ve hic le care

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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 257must 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 .
_& WARNING (continued)
• 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. •
Brake fluid
Checking brake fluid level
The brake fluid level can be checked with a quick glance.
Fig. 203 Engine
compartment: Brake
fluid reservoir
Before you check anything in the engine compartment,
always read and heed all WARNINGS:::::, & in "Working in
the engine compartment" on
page 250.
Pull the rubber strip@ up partially and lift the cover @
slightly :::::, fig. 203.
- Read the brake fluid level from the brake fluid reservoir
©. The brake fluid level must be between the "MIN" and
"MA X" markings. _..

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•
The brake fluid reservoir is located at the rear partition of the engine
compartment on the left side~
page 252 .
The fluid level may drop slightly after some time due to the auto­
matic adjustment of the brake pads. This is not cause for alarm .
If the brake fluid level falls
considerably below the "MIN" mark, the
brake warning/indicator light (U .S. models :
BRAKE, Canadian models :
(CD) ) wi ll come on
~ page 23 and ~ page 30. Do not continue to
operate the vehicle. The complete brake system should be thor ­
oughly checked by an authorized Audi dealer or qualified workshop
and the cause corrected . If the brake fluid level is too low, the brake
warning/indicator light will illuminate. Contact an authorized Audi
dea ler
immediately .•
Changing brake fluid
Have the brake fluid changed by an experienced techni­
cian.
Brake fluid absorbs moisture from the air . If the water content in the
brake fluid is too high, corrosion in the brake system may result
after a period of time. The boiling point of the brake fluid wil l also
decrease considerably and decrease braking performance.
Therefore, the brake fluid must be changed
every two years. Always
use new brake fluid which conforms to Federa l Motor Vehic le Stan­
dard "FMVSS 116 DOT 4".
The brake fluid reservoir can be difficult to reach, therefore, we
recommend that you have the brake fluid changed by your autho ­
rized
Audi dealer. Your dealer has the correct tools, the right brake
fluid and the know -how to do this for you.
& WARNING
• Brake fluid is poisonous. It must be stored only in the closed
original container out of the reach of children!
& WARNING (continued)
• Brake failure can result from old or inappropriate brake fluid.
Observe these precautions :
- Use only brake fluid that meets SAE specification
J 1703 and
conforms to Federal Motor Vehicle Standard 116. Always check
with your authorized Audi dealer to make sure you are using
the correct brake fluid. The correct type of brake fluid is also
indicated on the brake fluid reservoir .
- The brake fluid must be new . Heavy use of the brakes can
cause a vapor lock if the brake fluid is left in the system too
long. This can seriously affect the efficiency of the brakes as
well as your safety . This could result in an accident.
0 Note
Brake fluid wil l damage the paint of your vehicle .
ci> For the sake of the environment
Because of the problem of proper disposal of brake fluid as well as
the special tools required and the necessary expertise, we recom­
mend that you have the brake fluid changed by your authorized Audi
dealer. •
Battery
General information
Under normal operating conditions, the battery in your Audi does
not need any maintenance. With
high outside temperatures it is
advisab le however to check the fluid level at regular intervals
through the transparent battery housing. Also check the fluid level
each time you charge the battery . After charging the battery
~ page 265, you shou ld likewise check the battery acid level. ...
Vehic le care

Tires a nd wh eels BIii ________________________________ :....:.:.....::.=.....::.:..:..:..::..:___:___:..__ __
•
Tires and wheels
Tires
General notes
Tires may be the least appreciated and most abused parts
of a motor vehicle.
Tires may be the least appreciated and most abused parts of a
motor vehicle. Tires are, however, one of the most important parts
of a vehicle, particular ly considering the comparative ly sma ll patch
of rubber on each tire that assures that all -important contact
between you, your vehicle and the road .
Maintaining the correct tire pressure, making sure that your vehicle
and its tires do not have to carry more weight than they can safely
handle, avoiding damage from road hazards and regular ly
inspecting tires for damage inc luding cuts , slashes irregular wear
and overal l condition are the most important things that you can do
to help avoid sudden tire failure including tread separation and
b lowouts .
Avo iding d am age
If you have to drive over a curb or similar obstacle, drive very slowly
and as close as possible at a right angle to the curb.
A lways keep chemica ls including grease, oil, gasoline and brake
flu id off the ti res .
I nspect the tires regularly for damage (cuts, cracks or blisters, etc .!.
Remove any foreign bodies embedded in the treads .
Storing tire s
Mark tires when you remove them to indicate the direction of rota ­
tion. This ensures you to be ab le to mount them correctly when you
reinstall them. When removed, the whee
ls or tires should be stored in a coo l, dry
and preferably dark place.
Store tires in a vertical position i f they are not mounted on r ims, in
a horizontal position if they are mounted on rims.
N ew tire s
New tires have to be broken in => &.
The tread depth of new tires may vary, according to the type and
make of tire and the tread pattern.
Hidd en d am ag e
Damage to tires and rims is often not readily visible . If you notice
unusua l vibration or the vehic le pul ls to one side, this may indicate
that one of the tires has been damaged . The tires must be checked
immediately by an author ized Audi dealer or qualified workshop .
Uni dir ection al tire s
A unidirect ional tire can be identified by arrows on the sidewa ll, that
point in the direction the tire is designed to rotate. You must fo llow
the specified direction of ro tation . This is necessary so that these
tires can deve lop their optimum characteristics regarding grip, road
noise, wear and hydroplaning resistance . For more information
=> page 298.
Rim s with bolted rim ring *
Light-alloy wheels with a bo lted rim ring consist of several parts .
These parts are screwed together with special bo lts, using a specific
technique. This ensures proper function, seal, safety, and true running of the wheel. For this reason, damaged rims shou ld be
replaced, and you should never repair or dismantle them
=> & .
Rim s with screw -on decorative co vers *
Light-a lloy whee ls can be furnished with interchangeab le decora -
tive covers that are mounted to the rim with se lf -locking bolts. ...
Vehic le care

_________________________________________________ F_ u_ s_ e_s _ a_n _ d_ b_ u_lb _ s ____ llll
[ i ] Tip s No . Equipm ent Amps
You are wel l adv ised to keep a supply of spare fuses in your vehic le.
15 Instrument c luster, Navigation system 10
Fuses with the proper ampere ratings are available at your Audi 16 Garage door opener 5
dea ler. •
17 Level , tire pressure control , park assist, 10 light/rain sensor
Fuse list Automatic headlig ht range control, left 5
Fuses which con be replaced. 19 Fog lights 15
Vacant
N o. Equipm ent Amps
21 Vacant
1 Air conditioner 10
22 Doors 15
2 Footwell illumination 5 23 Vacant
3 Heated washer jets 5 Central convenience electrical system 20
Radiator fan 5 25 Heater blower 30
5
Telephone, oil level sensor, multifunction 10 Rear window defogger 30 switch, rear heated seat, shift gate
Air conditioner (air quality sensor), air pressure
27 Socket for tra iler towing (controller) 30
6 5
sensor 28 Fuel pump 20
Electronic Stabil izat ion Program (ESP), bra ke 29 Vacant
7 light switch, clutch peda l switch, steering angle 10
sensor
30 Power top control un it 30
8 Telephone 5 31
Automatic transmission, mirror dimming, diag-15 nosis socket
9 Brake booster (vacuum pump) 15 Towing assembly 15
10
Automatic headl ight beam adjustment, auto -5 33 Cigarette
lighter 20 matic headlight range control, right
34 Electrical socket 20
11
Airbag control unit, front passenge r seat recog -10 nition USA (bladder mat) 35 Luggage compartment socket 20
Diagnosis socket 10 Windshield wiper system 30
13
Steering c olumn module 10
37 Pump for windshie ld an d head light washer* 30
14
Brake lights 10
system
• Do-it-yourself service

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& WARNING (continued)
• Before you check anything in the engine compartment, always
read and heed all WARNINGS~ page 242, "Engine compartment".
0 Note
• Applying a higher voltage booster battery will cause expensive
damage to sensitive electronic components, such as control units,
relays, radio, etc .
• There must be no electrical contact between the vehicles as
otherwise current could already start to flow as soon as the positive
(+) terminals are connected.
[ i] Tips
The discharged battery must be properly connected to the vehicle's
electrical system. •
Use of jumper cables
Make sure to connect the jumper cable clamps in exactly
the order described below!
Fig. 225 Jump·
starting with the
battery of another
vehicle : A -discharged
vehicle battery, B -
booster battery
Vehicle with discharged battery:
- Turn off lights and accessories, move lever of automatic
transmission to
N (Neutral) or P (Park) and set parking
brake.
Connect POSITIVE (+) to POSITIVE (+) (red)
1. Connect clamp of plus cable to positive(+) terminal G)
~ fig. 225 of discharged vehicle battery@.
2. Connect clamp on opposite end of cable to positive(+)
terminal
® of booster battery@.
Connect NEGATIVE (-) to NEGATIVE (-) (black)
3. Connect clamp of minus cable (black) to negative( -)
terminal
0 of booster battery@.
4. Connect clamp on opposite end of negative cable to the
negative( -) terminal © of the discharged vehicle battery
@.
- Check that all screw plugs on the battery cells are
screwed in firmly. If not, tighten plugs prior to
connecting clamp on negative battery terminal.
Starting the engine
- Start the engine of the vehicle with the booster battery.
Run the engine at a moderate speed.
- Start engine with discharged vehicle battery in the usual
manner.
- If the engine fails to start: do not keep the starter
cranking for longer than 10 seconds. Wait for about 30
seconds and then try again. .,,.
~ehicle care Do-it-yourse lf service Technical data

llffl __ A_l-=- p _h_ a_ b_e _t_ic _ a_l _in _ d_e _x ____________________________________________ _
A
Accessories . . . . . . . . . . . . . . . . . . . . . . . . 318
Acoustic park assist . . . . . . . . . . . . . . . . . 122
Adaptive Light Air outlets
Climate controls .. .... ...... ..... 115
How should I adjus t the air outlets to de­
frost my windows as quickly as
possible? . . . . . . . . . . . . . . . . . . . . . . 115 Warning/indicator lights
... ... .... .. 20
When must the system be inspected? . ..
179
All Wheel Drive ... .... .... ...... .... 218
Alloy wheels . . . . . . . . . . . . . . . . . . . . . . . 237
defective ............. ........ .. . 34 Air quality sensor .
.... .... .... .... .. 114 All-whee l drive
adaptive light .. ... .... .... ... ...... . 79 Air recirculation
............... ..... 113
Winter tires .. ......... .... .... .. 284
Adding Engine coolant ... .... .... ...... .
259
Engine oi l ..... .... ... .... .... .. .
255
Windshield washer fluid .... .... . .
266
Additiona l accessories .. ...... ...... . 318
Additives Engine oil . ..... .. ..... ... ...... . 255
Adjusting Instrument cluster illumination .. .... 15
Steering wheel co lumn .... ... .... 118
Adjusting the seats
Manual seats ...... .... ........... 94
Advanced Airbag System . . . . . . . . . . . . 172
Children ... ........... .... ... ... 191
Components ...... .... .......... 175
Front airbags . . . . . . . . . . . . . . . . . . . . 173
How the components work together 176
Monitoring . . . . . . . . . . . . . . . . . . . . . . 179
Weight -sensing mat . .... ... .. .... 191
Air conditioning
See Climate controls . . . . . . . . . . . . . . 110
Air distribution Clima te con trols ... .... ... .... ... 114 Climate controls
...... ...... ... .. 114 Alternator
When should I use the air recircu lation?
114
Air ventilation in the glove compartment ...
108
Airbag system ..... ... .... ..... . 168, 188
Care ... ... .... .... .... .... .... .. 182
Child restraints .............. .... 192
Components (front airbags) .. ... ... 175
Danger of fitting a child safety seat on the
front passenger seat . . . . . . . . . . . . 170
Disposal . . . . . . . . . . . . . . . . . . . . . . . . 182
Front airbags . ....... ..... .... ... 172
How do the front airbags work? . . . . 177
How many airbags does my vehicle have? 175
Important safety instructions on the knee
airbag system .... .... .... .... .. 186
Important things to know ... .... .. 168
Indicator light ... .......... ... ... 179
Knee airbags .... . .. .. ........... 184
Monitoring .... .... .... .... .... .. 179
PASSENGER AIR BAG OFF light ..... 180
Repairs . . . . . . . . . . . . . . . . . . . . . . . . . 182
Side airbags . . . . . . . . . . . . . . . . . . . . . 187
See Generator . . . . . . . . . . . . . . . . . . . . 22
Anti -freeze
S ee Engine coolant system .. ...... 257
Anti-glare inside day-night mirror ...... 88
Anti-lock brake system How the ABS system works . .... ... 216
Warning/indicator lights ........... . 20
An ti- Slip Regulation System (ASR)
How the sys tem works .. ... .... ... 214
Anti-Theft Alarm System Tilt sensors ..... ....... ..... ...... 58
Anti-theft alarm system .. .. .. .... .... . 57
Anti -theft systems
Electronic immobilizer ......... .... 49
Armrest Adjusting ...... .... ..... .. ..... . 100
Storage bin
Ashtray 100
Front ....... .................... 104
Rear .......... .... .... ........ .. 105
Asterisk What does it mean when something is marked with an asterisk? . ..... ... .. 6
Audi Service Repair Manuals and Literature 316

Alph ab eti ca l ind ex -
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AUTO
Climate controls .. ...... ..... .... . 112
Switching on .... .... .... .... .... 112
When should I use AUTO? ....... .. 112
Auto Safety Hotl ine .. ..... ... ... .... . 155
Auto-Check Control .. ... ... .... ... .. .. 28
Automat ic air recirculation ........... 114
Automatic belt retractor .... ...... .... 163
Automatic car wash
See Washing .. .... .... ... ...... .. 231
Automatic headlight con trol ....... .... 77
Automatic rollover protection system . . 156
Automatic Shift Lock (ASLl ....... 128, 135
Automatic transm ission
6 -spe ed automatic transmission .... 126
Automatic Shi ft Lock (ASLl .... . 128, 135
Driving ........ ..... ....... ..... 126
Dynamic shif t prog ram ... .... .... . 129
Fail-safe mode ... ...... ........ .. 13 1
Ignition key safety lock ... ... ... .. . 119
Kick-down ... .... .... .... ... .... . 129
Manual sh ift program . ... .... .... . 130
multitronic® ... ... ... .... ... ..... 131
Se lector lever ..... .... ...... . 127, 133
Shift but tons . ... .... .... .... 131, 137
Steering wheel with tiptronic® . 131,137
Average speed ... ... ... ... .. ...... ... 37
Avoid damaging the v ehicle .. ... .... . 22 1
Controls and equip­
ment Safety first
B
Battery .
.... .... ...... .... ... .. 261, 264
Charging ...... .. ... ..... .. .. .... 265
Checking battery acid level . .... .... 264
Important warnings when working on the batte ry . .......... .... ... .. ... . 263
Low vol tage symbo l .. ....... .... ... 34
Replacing the battery . ...... .. .... 262
Winter opera tion ... .. ...... ...... 261
Working on the battery .......... .. 263
B efore driving ... ..... .. ...... ...... 146
Blended gasoline ... ... .. .. .. .... .... 244
Body cavity sealing .. .. .. ...... .... .. 237
Boos ter seats .... .... .... .... .... ... 198
How do I properly instal l a booster seat in
my vehicle? . .......... ...... ... 198
Sa fety instructions . .... .... .... ... 198
Brake f luid
Changing the brake fluid .......... 261
Checking the brake fluid leve l .. .... 260
Reservoir . ... .... .... ....... .... . 260
What is the correct brake fluid level? 260
What shou ld I do if the brake fluid warning
light comes on? . ..... ... .... .... 260
Brake system .. ...... .... .... .... ... 260
An ti- lo ck brake system (ABS) ... .... . 20
Brake ass istant . .... .. .... .... ... . 217
Brake booster .... .... .... .... .... 216
Brake flu id .... ... .... .... .... .... 260
Brake f luid specifications for refi ll and
rep lacement . ... ..... ... .... .... 261
Brake pads ...... .... .... .... .... 220
Genera l informa tion ....... .. .... . 215 How does the moisture or road salt affect
the brakes? ....... ... .... .... ... 215
Ma lfunction ... .. .... .... .... .. .. . 30
Warning/indicator lights .. .. .... .... 23
Worn brake pads symbol . ..... .. .. . 33
B reak -in period ...... .... .... .... ... 219
B rake pads ... .... .... .. . .... .... 220
Tires ..... .... .... .... ... .... .. .. 219
Bu lbs ... ... .... ... ... ... .... ...... . 302
C
California Proposition 65 Warning . .... 251
Battery specific ..... ...... .... .... 264
Capacities Eng ine oil .... .... .... ... .... .... 31 4
Fuel tank ..... ...... .. ...... .... . 314
Windshield washer fluid ... .... .... 314
Car care ... .. .... ... .... .... .... .. .. 230
Interior ... .... .... .... ... .... .... 238
Plastic and v inyl .... ... .... .... ... 234
Weatherstr ips . .... .... .... ...... . 236
Care of exterior ..... .... .... .... .. .. 230
Cargo area
See Loading the luggage compartment .
153
Catalytic converter .. ...... ...... .... 220
Centigrade Switching between Centig rade and
Fahrenheit ...... .... .. .. ... .. .. 11 3
Certification . ............ ...... .... . 320
Changing a flat tire ....... ... .... .. .. 293
Chan ging a wheel .... .... ... .... .... 293
Vehicle operation Vehicle care Do-it-yourself service Technical data