2009 AUDI A4 CABRIOLET brake pads

[ i] Tips
If this warning/indicator light illuminates while you are driving, then
there is a malfunction in the engine electronics. Have the malfunc ­
tion corrected as soon as possible by your authorized Audi dealer or qualified workshop. •
Brake system BRAKE (USA models)/ (CD)
(Canada models)
This warning/indicator light illuminates when the brake
fluid level is too low or when there is a malfunction in the
ABS, or when the parking brake is set.
The light illuminates when the ignition is turned on. It goes out after
the engine has been started and the parking brake is fully released.
This indicates that the brake warning light is functioning properly.
If the brake warning light does not light up when the engine is
cranking or the parking brake is applied, there may be a malfunction
in the electrical system. In this case, contact your Audi dealer.
(USA models): If the warning light BRAKE and the warning light
illuminate together, immediately contact your authorized Audi
dealer or qualified workshop to have all brake pads inspected
=:> page 33.
When the light comes on, an audible warning signal is also given.
Parking brake set
The BRAKE or ((D) (Canada) warning/indicator light illuminates when
the parking brake is set=:>& .
& WARNING
• USA models: If the BRAKE warning light and the . J'l warning
light come on together, the rear wheels could lock up first under
hard braking. Rear wheel lock-up can cause loss of vehicle control
Controls and equip ­
ment
Instruments and warning/indicator lights
& WARNING (continued)
and an accident. Have your vehicle repaired immediately by your
authorized Audi dealer or a qualified workshop. Drive slowly and
avoid sudden, hard brake applications.
• Canada models: If the brake warning light (CD) and the ABS
warning light _. come on together, the rear wheels could lock up
first under hard braking. Rear wheel lock-up can cause loss of
vehicle control and an accident. Have your vehicle repaired imme­
diately by your authorized Audi dealer or a qualified workshop.
Drive slowly and avoid sudden, hard brake applications.
• If the brake warning/indicator light does not go out after a few
seconds and the parking brake released, or lights up while you are
driving, the fluid level in the brake fluid reservoir is too low. If you
believe that it is safe to do so, proceed immediately at low speed
to the nearest authorized Audi dealer or qualified repair facility
and have the brake system inspected .
• Always keep in mind that after several brake applications, you
will need greater pressure on the brake pedal to stop your vehicle.
Do not rely on strained brakes to respond with maximum stopping
power in critical situations . You must allow for increased braking
distances. The extra distance used up by fading brakes could lead
to an accident. •

II
Light/rain* sensor defective
Worn brake pads
USA m odels :
Speed warning 1
Canad a m od els:
Speed warning 1
Dynamic headlight range con trol*
defective
Adaptive Light* defective
Windshield washer fluid level low
U SA mod els:
Speed warning 2
Canada mod els:
Speed warning 2
Battery voltage too high or too low
D efective light bu lb
Tire pressure monitoring system* Loss of air pressure
Tire pressure monitoring system*
System not available
~ page33
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~ page 34
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~ page34
~ page 34
~ page35
~ page 43
~ page46 I
Ye llow symbols indicate a priority 2 malfunction -Warning!
When a yellow symbo l appears, a warning tone wi ll sound
once.
Check the displayed function as soon as possible. If more than one
priority 2 ma lfunction is detected, all symbols will appear one after
the other for about two seconds. •
Controls and equip­
ment
Driv er inf ormati on di spl ay
Fuel supply too low l
When the -,symbol illuminates, this means there is about 2 to 2.5
gallons (8 to 10 litres) of fue l left in the fuel tank . Time to refuel!
~ page 245. •
Engine oil level '7.:.
When the-=· symbol illuminates, check the engine oil level as soon
as possib le ~
page 254 . Add oil if necessary ~ page 255. •
Engine oil sensor defective • ..
If the .,_,ft symbol illuminates, contact your author ized Audi dea ler
and have the oil sensor inspected. Until you have this done, check
the oi l leve l each time you refuel just to be on the safe side
~ page 254. •
Applies to vehic les: with Lighting package
Light/rain* sensor defective >
- Automa tic headl ight s/autom atic wiper s def ective
If the symbol il luminates, the light/rain sensor has failed. For safety
reasons the low beams are turned on permanently with the switch
in
AUTO . However, you can continue to turn the lights on and off
using the light switch. In the case of a defect in the rain sensor, the
windsh ield wiper lever functions are still avai lable. Have the
light/rain sensor checked as soon as possible at a dealership. •
Worn brake pads J
r Brake p ad s!

Driver information display
If the warning light illuminates, immediately contact your autho­
rized Audi dealer or qualified workshop to have all brake pads
inspected. On USA models the warning light
O comes on together
with the warning light
BRAKE. Both sets of brake pads on an axle must
always be replaced at the same time .
& WARNING
Driving with bad brakes can cause a collision and serious personal
injury.
• If the warning light , and the warning light
BRAKE11 with the
message Brake pads! comes on in the instrument cluster display,
immediately contact your authorized Audi dealer or qualified
workshop to have all brake pads checked or replaced if necessary .•
Speed warning 1 ~ (USA models)/
models) (Canada
If
the symbol illuminates, this means you are driving faster than
the set vehicle speed . Slow down! =>
page 35. •
Applies to vehicles : wit h dynami c h ea d light ran ge ad ju stment
Headlight range control defective C.1
If the symbol illuminates, the dynamic headlight range control is
no longer working properly. Have the system checked and repaired
a t your Audi dealer. •
11 BRAKE : USA models only
App lies to vehicles: w it h ada ptive li gh t
Adaptive Light defective ~ ,
When this symbol I illuminates, it means that Adaptive Light is
defective . Go to an authorized dealership to have the headlights or
the control unit for the Adaptive Light repaired. •
Windshield washer fluid level too low ¢;>
If the-;... symbol illuminates, add windshield washer fluid to the
washer system and also for the headlight washer
system *=>
page 266. •
Speed warning 2
models) (USA models)
/
(Canada
If the symbol illuminates, this means you have driven faster than
the second set vehicle speed. Slow down! =>
page 35. •
Battery voltage low ....J
If the C:::-symbol illuminates, contact your authorized Audi dealer
and have the following components inspected:
• drive belt
• generator
• battery charge
Also see if the generator warning/indicator light illuminates
=>
page 22. •

Braking
General information
What affects braking efficiency?
O pera tin g co ndition s and drivi ng h abit s
The brakes on today's automobiles are still subject to wear,
depending large ly on operating conditions and dr iving habits~
&­
On vehicles that are either driven mostly in stop -and -go city traffic
or are driven hard, the brake pads shou ld be checked by your autho­
rized Audi dealer more often than specified in the
W arr anty & Main ­
t e nanc e bo okle t.
Fai lure to have you r brake pads inspec ted ca n
resu lt in reduced brake performance.
On steep slopes, you shou ld use the braking effect of the engine.
This way, you prevent unnecessary wear on the brake system. If you must use your brakes, do not hold the brakes down continuous ly.
Pump the brakes at intervals.
Moi sture or road salt
If you are driv ing faster than 50 mph (80 km/h) and the windshie ld
wipers are on, the brake pads wi ll briefly touch the brake discs in
regu lar intervals so as to improve reaction time when braking on
wet surfaces. You, the driver, wil l not notice anything.
Under ce rta in conditions, for example, when dr iving through water
or very heavy rain, or even after washing your vehicle, the braking
effect can be reduced due to moisture (or in freezing conditions ice)
on the brake pads. A few cautious brake applications should dry off
the b rake pads or remove any ice coatings .
At speeds
over80 km/h and with the windshie ld wiper turned on, the
brake pads are app lied briefly to the brake discs. This occurs at
regu lar interva ls wi thout the driver not icing and provides for better
brake response time under wet conditions.
The effectiveness of the brakes can be reduced when the vehicle is driven on a sa lt-covered road and the brakes are not used. Likewise,
Controls and equip­
ment Safety first Vehicle operation
Int
ellig ent tec hnol ogy
you clean off accumulated sa lt coating from brake discs and pads
with a few ca utious applications of the brake ~
&-
Cor rosi on
There may be a tendency for dirt to build up on the brake pads and
corrosion to form on the discs if the car is not driven regularly or
only f or sho rt trips with little use of the brakes.
If the brakes are not used frequently, or if corrosion has formed on
the discs, it is advisable to clean off the pads and discs by braking
firm ly a few times from a moderately high speed~
&-
Fa ults in the brake system
If you shou ld notice a sudden increase in brake pedal trave l, then
one of the two brake circuits may have failed~
&-
Lo w brak e fluid l evel
Malfunctions can occur in the brake system i f the brake fluid level is
too low . The brake fluid level is monitored electronically .
Brake lining wear statu s
Brake lining wear may be checked by visua l inspection of the condi ­
tion o f the brake pads through the open ings in the wheel. If neces­
sary, the wheel may be removed for this inspection
~ page 293,
"Whee l change".
& WARNING
• You should perform braking maneuver s for the purpo se of
cl eani ng th e br ake sy stem onl y if ro ad condition s permit . Other
road u se rs mu st not be put a t ris k -you may cau se an accident!
• Before des cending a steep gr ade , reduce sp eed and sh ift tr ans ­
mi ssion into a lower gear or lower driving po sition . Do not ride the
brake s or hold the pedal d ow n too long or t oo often . This could
cau se the brake s to get hot and dimini sh brakin g efficien cy . _.
Vehicle care Do-it-yourself service Technical data

___ ln_ te_ ll..,,ig ..,_ e_ n_t _t_ e_ c_ h _ n_o _ l_o _,.g= y,_ __________________________________________ _
& WARNING (continued)
• Do not "ride the brakes" by resting your foot on the pedal when
you do not intend to brake. This may cause the brakes to overheat, premature wear and increased stopping distance.
• Under certain climatic and operating conditions such as
passing through water, driving in heavy rain or after washing the
vehicle, the effectiveness of the brakes can be reduced. In winter,
ice can accumulate on the brake pads, linings, discs and drums .
Cautiously apply brakes for a test. Brakes will dry and ice coatings
will be cleaned off after a few cautious brake applications .
• Driving for an extended period of time on salt-covered roads
without using your brakes can also affect braking efficiency. Clean
off accumulated salt coating from brake discs and pads with a few
cautious brake applications.
• If you damage the front spoiler, or if you install a different
spoiler, be sure the air flow to the front brakes is not obstructed.
Otherwise the brake system could overheat reducing the effective ­
ness of the entire brake system.
• Failure of one brake circuit will impair the braking capability
resulting in an increased stopping distance. Avoid driving the
vehicle and have it towed to the nearest Audi dealer or qualified
workshop. u
Brake booster
The brake booster adds extra braking power.
The brake booster works with vacuum pressure which is created
only when the engine is running~ &.
& WARNING
• Never let the vehicle roll to a stop with the engine shut off.
• If the brake booster is not working, for example when towing
your vehicle, or because the brake booster has somehow been
& WARNING (continued)
damaged, the brake pedal must be pressed considerably harder to
make up for the lack of booster assistance. •
Functioning of Anti-Lock Brake System (ABS)
ABS prevents the wheels from locking up under braking.
The ABS contributes effectively to vehicle control since it prevents
the wheels from
locking when the brakes are applied. This means
that the vehicle remains steerable and is less likely to skid.
With ABS you do not need to pump the brake. Just hold the brake
pedal down.
However , do not expect that the ABS shortens braking distance
under
all circumstances. When driving on gravel or on newly fallen
snow on top of icy surfaces, braking distance may be even longer,
therefore, under these circumstances, it is especially important that
you drive slowly and with great care.
How the ABS system works
An automatic check is made when a speed of about 4 mph (6 km/h)
is reached. When this happens, a pumping noise can be heard.
If an individual wheel begins to rotate too slowly in relation to
vehicle speed and tends to lock, the ABS automatically reduces brake pressure to prevent that wheel from locking.
This automatic adjustment process will cause a
slight vibration of
the brake pedal and some noises to alert you that vehicle speed
must be adapted to existing road and traffic conditions.
& WARNING
Although the ABS is very effective, always remember that braking
capability is limited by tire traction . Always adjust your driving
speed according to the road and traffic conditions. Do not let the .,_

___ D_ r_i v_ in_,.. g"'- a_ n_ d_ e_ n_ v_i_r _o _n_ m_ e_n_ t _______________________________________________ _
New brake pads
Remember that new brake pads do not have a full braking
effec t during the first 250 miles (400 kilometers) after they
are installed .
New brake pads have to be "burn ished in" before they have optimal
grab =>& .
During the break -in period, you shou ld avoid putting severe loads
on the brakes . Severe loads include, for examp le, sudden hard
braking, in particular at very high speeds or, for example, on moun ­
tain passes.
& WARNING
Ne w brake p ad s don't h ave the bes t sto pp in g po we r and mu st b e
"brok en-in " durin g the initial 100 to 1 50 m il es ( 150 to 200 kil ome ­
t e rs) of norm al cit y dri ving . Y o u can com pensat e for thi s by
p re ss ing the br ake p ed al more firm ly. Th is also appli es later w he n
n ew pad s a re in sta lled.
:J
Catalytic converter
It is very important that your emission control system
(catalytic converter) is functioning properly to ensure that
y o ur vehicle is running in an environmentally sound
manner.
- Always use lead-free gasoline=> page 244, "Fuel supply".
- Never run the tank down a ll the way to empty.
- Never put too much motor o il in your engine =>
page 255,
"Adding eng ine oi l 'l:::r.11
•
- Neve r try to push -or tow -s ta rt yo ur vehic le.
The catalytic converter is an efficient "clean-up" device built into the
exhaust system of the vehicle. The catalytic converter burns many
of the po llutants in the exhaust gas before they are released into the
atmosphere.
The exc lusive use of unleaded fue l is critica lly important for the l ife
of the cata lytic converter and proper functioning of the engine.
& WARNING
• Do not p ark or op erate th e veh icle in are as w here the h ot
ex hau st sys tem m ay come in co ntac t w ith dr y gr ass, brush , fuel
s pill or other mater ial which can cau se a fire .
• Do not apply a dditi ona l u nder coating or ru stpr oofing on or
n ea r the exhau st m anifold , exhau st pipe s, ca ta lytic conv ert er or
h eat shie ld s. Dur in g d riving , the sub sta nce use d fo r und ercoa ting
coul d ove rhea t and cause a fire .
0 Note
• Be aware that just one tank filling with leaded fue l wi ll already
seriously degrade the performance of the catalytic converter.
• Do not exceed the correct engine oi l level =>
page 255.
• Do not drive until the fuel tank becomes comp letely empty . The
engine cou ld misfire. Unburned fuel could also get into the exhaust
system and this could cause the catalytic conver ter to overheat .
• Do not turn off the ignition while the vehicle is moving.
• Do not con tinue to operate your vehicle under these conditions,
as otherwise fuel can reach the cata lytic converter . This cou ld result
in overheating of the converter, requiring its rep lacement .
• To assure eff icient operation of the Em ission Control System:
- Have your vehicle maintained properly and in accordance with
the service recommendations in your Warranty
& Maintenance
booklet. •

_____________________________________________ C_ h_ e _ c_k _in ---= g'--- a_n _d_ f_il _li _n __.,g==----•
•
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

Alph ab eti ca l ind ex -
-------------=----
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