brake AUDI A5 COUPE 2012 Service Manual

until near maxim um RPM is reached, or unt il
the driver shifts into 2nd gear .
I f y ou ta ke your foo t off the acceler ator ped al
when dr iving down a steep in cline, tiptronic
will downshift from the se lected gea r into the
next lowe r gear until it reaches 1st gea r,
based on road speed and eng ine RPM. A uto ­
mat ic downshifting is interrupted as soon as
you apply the thrott le aga in.
@ Tips
- When yo u shift into the next lower gear,
t h e transmiss io n will downs hift only
when there is no possibility of over-rev ­
v ing the e ngine.
- When t he kick-down comes on, the
transmission will sh ift down to a lower
gear, d epe nding on vehicle a nd e ngine
s peeds .
- tiptron ic is inoperative when the trans ­
mission is in th e fail-safe mode .
Steering wheel with tiptronic
Applies to vehicles: with tiptronic steer ing wheel
The shift buttons on the steering wheel allow
the driver to shift gears manually .
Fig. 148 S tee rin g w hee l: S hift buttons
• To downshift, to uch the button on the left
0 -
• To upsh ift, touch the but ton on the rig ht
0 -
The s hift buttons are ac tivated when the se­
l ecto r lever is in
D , S or in the manual shift
p rog ram (tiptron ic) .
Transm ission 131
O f course, you can continue to use the manua l
s h ift pr ogram with the selector lever on the
cente r co nsole.
Transmission malfunction
Applies to vehicles: wit h automatic transmission
[O] Transmission : please press the brake ped ­
al and select the position again
Press the bra ke pedal and select the desired
selector lever position again. You can then
continue driving.
[O] Transmi ssion hot: please modify driving
style
T he trans mission tempe ra tur e has increased
s ignifica ntly due to t he spor ty dr ivin g manner .
Drive in a less sporty ma nner until the tem ­
perature returns to the normal range and the
indicator light switches o f.
[O] Transmission malfunction: You can con­
tinue driv ing
T here is a system malfunc tion in the transm is­
s io n. You may con tinu e dr ivin g. D rive to yo ur
a utho rize d Au di dea le r or qu alified repa ir fa­
c ility soon to have the ma lfunction corrected .
[O] Transmission malfunction: Limited driv­
ing functionality
T he re is a system mal func tion in the t ransmis­
s io n. The transm iss ion is swi tching to emer­
gency m ode . Th is mode o nly shifts into cer­
t ain gears o r will no longer shi ft at all. The en­
g ine m ay sta ll. Drive to you r author ized Audi
dealer or qualif ied repair facility immediately
to have the malfunction corrected .
[O] Transmission malfunction: Stop and shift
to P
Do n ot continue dr iving. Se lect t he P selector
lever posi tion an d see your au thori zed A udi
de aler or qu alified re pair facili ty for assis ­
ta nc e.
(D Note
If th e tra ns missi on swit ches to emer gen cy
mode, y ou sh oul d tak e th e ve hicl e to an
IJll>

140 Homelink®
Homelink®
Universal remote
control
General information
Applies to vehicles: with Home link® universal remote
control
The Homelink ® feature can learn up to three
radio frequency codes for most current trans­
mitters used for operating garage doors, es­ tate gates, home or outdoor lighting sys­
tems, and other devices.
You must first program the Homelink ® trans­
mitter before you can use the system
~ page 141, Programming the Homelink ®
transmitter.
In order to program the Home link ® transmit­
ter for dev ices utilizing rolling code, a second
pe rson on a ladder who ca n safe ly reach the
garage door opener motor is recommended. I t is also necessary to locate the "learn" but­
ton on your garage door opener motor . Refer
to the operating instructions for the opener,
as the location and color of this button may
vary by manufacturer.
You can still use the origina l remote contro l
for the device at any time .
.&_ WARNING
-
- Never use the Homelink ® transmitte r
with any garage door opener that does
have not the safety stop and reverse fea­
tu re as requ ired by federa l safety stand­
ards. Th is includes any garage door open­
er mode l manufact ured before April 1,
1982.
- A garage door op ener which cannot de­
te ct an object, signa ling the doo r to stop
and reverse does no t mee t current feder ­
al safety s tandards. Using a garage doo r
opener wi tho ut these features increases
risk of serious in jury or death.
- F or sa fety reasons never release the
par king brake or start the engine w hile
anyone is stand ing in front of the vehicle . -
A garage door or an estate gate may
sometimes be set in mot ion when the
Homelink ® remote control is being pro­
grammed. If the device is repeatedly ac­
tivated, this can overstrain motor and
damage its e lectr ical components -an
overheated moto r is a fire hazard !
- To avo id possible injuries or property
damage, please always make abso lutely
certain that no persons o r obje cts are lo­
ca ted in the range of motion o f any
eq uipment being ope rated .
(D Tips
-If you would li ke more information on
Home link ®, w here to purchase the
Homel ink ® compatib le produc ts, or
would like to purchase the Homelink ®
Home Lighting Package , please ca ll to ll­
free: 1-800-355-3515 .
- For Declaration of Compliance to United States FCC and Ind ustry Canada reg ula­
tions~
page 296.

Programming the Homelink®
transmitter
Applies to vehicles: with Horne link® universal remote
control
The transmitter is programmed in two phas­
es. For rolling code transmitters, a third
phase is also necessary .
/
'/' ~ ..,.-,,,, ~
;,, r ,O :O·,) ,,,, ;
®
)
I~-,- ( o
-
,)- ~ (> ~
Fig. 159 Ove rhead co nsole: Homelink ® keypad
Fig. 160 Radiator gr ille
Phase 1:
programming the overhead keypad
l
~
" CX> !E
;
CX> a,
1. Make sure your vehicle is w ithin operat ing
range of the remote controlled garage
door opener.
2 . Set the parking brake~
A in General in­
forma tion on page 140.
3 . Turn the ignition on. Do not start the en­
gine!
4. Press and hold the two outs ide Home­
Link ® buttons
(D and @for approxi­
mately 20 seconds until indicator light@
c:;, fig. 159 begins to flash. Then release
both buttons. Do not hold the buttons for
longer than
30 seconds .
• This procedure only needs to be performed
once. It erases the factory-set default codes
and does not have to be repeated to pro­
gram additional remote controls .
Homelink® 141
5. Press and hold the Homelink® button (D ,
@ or @ until the indicator light @
starts flashing
slowly . Release the button.
• The system will remain in programming
mode for 5 minutes. Co to the front of the
vehicle and proceed with phase 2 .
Phase 2: at the radiator grille
6. Point the original remote control to the
middle of the radiator grille of your vehi­
cle
¢ fig. 160.
7. Hold the original remote control at a dis­
tance between
0 -5 in. (0-13 cm) (use the
shortest distance possible) .
8. Press and hold the activation button on
the remote control.
• May be different in Canada. If so, press and
re-press (cycle) the activation button on your
remote contro l every two seconds.
9. The emergency flashers will flash
three
times
(after about 15-60 seconds) when
the programming is successful. Release
the button on the remote control.
• To program more devices, repeat steps 4 to
9.
10 . Press and hold the trained Homelink ®
button and observe the indicator light@
¢fig. 159.
• If the indicator light is solid/continuous ,
programming is comp lete and your device
should activate when you press and release
the trained Homelink ® button.
• If the indicator light blinks rapidly for 2 sec­
onds and is then a solid/continuous light,
proceed w ith phase 3 to program a rolling
code device .
Phase 3: rolling code programming
• A second person on a ladder who can safely
reach the garage door opener motor is rec­
ommended.
11. Locate the "learn" button on the garage
door opener motor (refer to the operating
instructions for the opener, as the loca­
t ion of this button may vary by man ufac­
turer) .
12 . Press and re lease the learn button on the
garage door opener motor .

Driver and passenger
side footwell
Important safety instructions
Applies to vehicles: with knee airbags
A WARNING
Always make sure that the knee a irbag can
inflate without interference . Objects be ­
tween yourself and the airbag can increase
the risk of inju ry in an acc ident by interfer­
ing w ith the way the a irbag deploys or by
be ing p ush ed into you as the airbag de­
ploys .
- No persons (ch ild ren) or animals should
ride in the footwell in front of the pas­
senger seat. If the airbag deploys, this
can result in serious or fata l injuries .
- No objec ts of any k ind sho uld be car ried
in t he footwell area in front of the driv­
er's or passenger's seat . B ulky objects
(shopping bags, for example) can ham­
per or prevent proper deployment of the
airbag . Small objects can be thrown
through the vehicle if the airbag deploys and injure you o r your passengers .
Pedal area
Pedals
The pedals must always be free to move and
must never be interfered with by a floor mat
or any other object.
M ake sure t hat all pedals move freely witho ut
in te rference and th at nothing prevents them
from returning to the ir origina l positions.
Only use floo r mats that leave the peda l area
free and can be secured w it h floor mat fas ten ­
e rs.
If a b rake circuit fails, increased b rake pedal
travel is req uired to br ing the vehi cle to a full
stop.
Dr iving S afel y 149
A WARNING
Pedals that cannot move free ly can cause
loss of vehicle control and increase the risk
of ser ious inju ry .
- Never p lace any objects in the drive r's
footwell . An ob ject cou ld get into the
pedal area and inte rfe re with pedal func­
tion . In case of sudde n bra ki ng o r an ac­
cident, yo u wo uld not be a ble to brake or
ac celer ate!
- Always ma ke su re tha t no thing can fall
or m ove into the driver's footwel l.
Floor mats on the driver side
Always use floor mats that can be securely
attached to the floor mat fasteners and do
not interfere with the free movement of the
pedals .
"' Ma ke s ure that the floor mats are prope rly
secured and cannot move and inte rfe re with
t he ped als~ ,&. .
U se on ly floor mats that leave the pedal area
unobst ructed and that are firmly secu red so
that they cannot slip o ut of posi tion . You ca n
obt ain suitab le floo r mats from yo ur aut ho r­
ized Audi dea ler .
Floor mat fastene rs a re insta lled in your Aud i.
Floor mats used in your vehicle must be at­
tac hed to these fastene rs . Prope rly secur ing
the floor mats will prevent them from sliding
i nto positions that could interfere with the
peda ls o r impa ir safe ope rat io n of yo ur vehicle
i n othe r ways.
A WARNING
Pedals that cannot move free ly can result
in a loss of vehicle control and inc rease the
risk of serious persona l injury.
- Always ma ke s ure that floo r mats a re
properly secu red.
- Never p lace or ins tall floor mats o r other
f loor coverings in the vehicle that cannot
be properly secured in p lace to prevent
them from slipping and interfer ing with
~
•
•

150 Driving Safely
the pedals or the ability to control the
vehicle.
- Never place or install floor mats or other
floor coverings on top of already instal­
led floor mats. Additional floor mats and
other coverings will reduce the size of
the pedal area and interfere with the pedals.
- Always properly reinstall and secure floor
mats that have been taken out for clean­
ing.
- Always make sure that objects cannot fall into the driver footwell while the ve­
hicle is moving. Objects can become
trapped under the brake pedal and accel­
erator pedal causing a loss of vehicle
control.
Stowing luggage
Loading the luggage compartment
All luggage and other objects must be prop­
erly stowed and secured in the luggage com­
portment.
Fig. 164 Safe load pos ition ing: place heavy objects as
low an d as far forward as possible.
Loose items in the luggage compartment can
shift suddenly, changing vehicle handling
characteristics . Loose items can also increase
the risk of serious personal injury in a sudden
vehicle maneuver or in a collision .
.,. Distribute the load evenly in the luggage
compartment.
.,. Always place and properly secure heavy
items in the luggage compartment as low
and as far forward as possible
cc> fig . 164 . .,.
Secure luggage using the tie-downs provid­
ed
c:>poge 69.
.. Make sure that the rear seatback is securely
latched in place.
A WARNING ,..__
Improperly stored luggage or other items
can fly through the vehicle causing serious
personal injury in the event of hard brak­
ing or an accident. To help reduce the risk
of serious personal injury:
-Always put objects, for example, luggage
or other heavy items in the luggage com­
partment.
- Always secure objects in the luggage
compartment using the tie-down eyelets
and suitable straps.
A WARNING
Heavy loads will influence the way your ve­
hicle handles. To help reduce the risk of a
loss of control leading to serious personal
injury:
-Always keep in mind when transporting
heavy objects, that a change in the cen­
ter of gravity can also cause changes in
vehicle handling:
- Always distribute the load as evenly as
possible.
- Place heavy objects as far forward in
the luggage compartment as possible.
- Never exceed the Gross Axle Weight Rat­
ing or the Gross Vehicle We ight Rating
specified on the safety compliance stick­
er on the left door jamb. Exceeding per­
missible weight standards can cause the
vehicle to slide and handle differently .
- Please observe information on safe driv­
ing
~ page 144.
A WARNING
To help prevent poisonous exhaust gas
from being drawn into the vehicle, always keep the rear lid closed while driving.
- Never transport objects larger than
those fitting completely into the luggage
~

204 Intelligent technology
Intelligent technology
Notice about data
recorded by vehicle
control modules
Your veh icle is not equipped with an Event Da­
ta Recorder (EDR), installed by some manu­
facturers fo r the express purpose of capturing
data for retrieval after an accident or crash
event. EDR's are sometimes called "crash re­
corders".
Some state laws restrict the retrieval or down­
loading of data stored by EDR's that were in­
stalled in a vehicle for the express purpose of retrieving data after an accident or crash
event without the owner's consent.
Although your vehicle is not equipped with an
EDR, it is equipped with a number of electron­
ic control modules for various vehicle systems
such as, for example, engine function, emis­
sion control, as well as for the airbags and
safety belts .
These electronic control modules also record
vehicle-related data during normal vehicle op­
eration for diagnostic and repair purposes .
The recording capacity of the electronic con­
trol modules is limited to data (no sound is re ­
corded) and only a small amount of data is ac­
tually recorded over a very limited pe riod of
time and stored when a system fault or other condition is sensed by a control unit. Some of
the data then stored may relate to vehicle
speed, direction, braking as we ll as restraint
system use and performance in the event of a
crash or other condition. Stored data can only be read and downloaded with special equip­
ment .
Electronic stabilization
Program (ESP)
General information
The ESP improves the vehicle stability .
Fig. 195 f;. OFF button
Fig. 196 Center console wit h ~ OFF button
ESP is designed to help you maintain vehicle
control in situations where the car approaches
the limits of "grip", especia lly when accelerat­
ing and cornering . ESP reduces the risk of
skidding and improves stability under all road
conditions .
The system operates across the ent ire speed
range in combination with the ABS system . If
the Anti-Lock Brake System (ABS) malfunc­
tions, the ESP will also shut down.
How the system works
The Anti -Lock Brake System (ABS), Electronic
Differential Lock (EDL) and the Anti-Slip Regu­
lation System (ASR) are integrated in the elec­
tronic stabilization program. In addition to
the data provided by these functions, the ESP
control unit requires additional measurement
data provided by high performance sensors.
T he rotational speed of the vehicle about its
II>-

vertical axis, vehicle acceleration in the fore ­
and-aft and lateral directions , the brake pres­
sure, and the steering ang le are all measured .
The direction in which the d river wishes to
travel is determined with the aid of the steer­
ing angle and vehicle speed and is continually
compared with the actual behavior of the ve­
h icle. If the two do not match, for examp le,
when the vehicle starts hydroplaning on a wet
road, ESP will automatically brake the appro­
priate wheel to correct the problem.
The vehicle is then stabili zed by the forces act ­
ing on the wheel dur ing braking. If the vehicle
is
oversteering (the veh icle turns too sharply
and the rear wheels sl ide toward the outs ide
of a curve), the brakes are main ly applied on
the wheel that is on the outside of the curve.
I n the case of a ve hicle that is
understeering
(the vehicle does not turn sha rply enough and
pushes out of a curve) , the brakes are applied
as needed on the whee l that is on the inside of
the curve o r additiona lly on the other wheels.
An acoust ic signal indicates when ESP brake
application cuts in
q .& .
The system operates across the entire speed
range in combination with the ABS system
q page 208. If the Anti-Lock Brake System
(ABS) malfunctions, the ESP will be out of ac­
tion as well.
Acti vating
When you turn on the engine, ESP wi ll auto­
matica lly be activated and will perfo rm a se lf­
test. As soon as the test is completed, the sys­
tem is in normal operating mode .
You can activate a deactivated ESP or deacti ­
vated ESP/ASR if required by pressing the
qfig. 196 q fig . 195 button. When they are
activated, the message
Stabilisation prog ram
on
appears briefly in the d isplay.
D eacti vating
The ESP sho uld normally be activated all the
time. If necessary, you can deactivate Anti ­
Slip Regulation (ASR) or the Electron ic Stabili­
zation Program (ESP) by pressing the button
<:::;, fig. 196 .
Intellig ent technolog y 205
-Dea cti vating ASR: Tap the b utton. In cer ­
tain exceptional situations (e.g . driving with
tire chains), the Anti -Slip Regu lation (ASR)
can be deactivated
q page 206. The mes­
sage
ASR off Caution ! Limited d riv ing sta­
bilit y
appears in the display as we ll.
- Deacti vating ESP /A SR Press the button for
more than 3 seconds. Wi th the ESP/ASR de­
activated, the ind icator light comes on, see
c:::;, page 15 . The message War ning! R estrict­
ed stability
appea rs in the d isp lay as well.
.8, WARNING -
The Electronic Stabi liz a tion Program is
neverthe less subjec t to the laws o f phys­
ics. It is part icu la rly important to pay a t­
tention to this fact on wet and slippery roads. It is therefo re important that you
a lways adapt your driving to the condit ion
of the road and traff ic conditions. Do not
allow the increased safety provided by the Elect ronic Stabilization Program system to
lull you into accepting addit iona l safety
r isks.
Electronic differential lock (EDL)
The electronic differential lock monitors the
rotational speed of the drive wheels .
General not es
The electronic d ifferential lock ( E0L) he lps the
car to star t moving, acce lerate and climb a
gradient on surfaces providing poor or almos t
no grip . Without EDL, this would be d iff icult,
if not impossible .
How the sy stem works
The EDL operates automatically. It mon itors
the rotational speed of wheels with the he lp
of the ABS sensors
q page 208 . If a noticea­
ble
slip is detected at the wheels (e .g . on s lip ­
pery ground
on one side), the sp inning wheels
are braked and power is t ransferred to the
othe r whee ls. Thi s is done up to a speed of
abo ut 60 mph (100 km/h) . Noises from the
brake system signa l that wheel spin is be ing
controlled .
Ill>
•
•

206 Intelligent technology
Driving off
When driving off, a lways be sure to keep road
conditions in mind as you accelerate. If one
drive wheel spins because it is on a surface
with less grip, apply
plenty of throttle until
the car starts to
move .
Overheating of brakes
To prevent the disc b rake o f the bra ked wheel
from overheating if subjected to excessive l oads on this whee l, the EDL cuts out tempo­
rarily. The vehicle remains operational and be­
haves in the same way as a vehicle without
EDL.
As soon as the brake has coo led down, EDL
switches on again automatically .
A WARNING
-When accelerating on slippery surfaces,
such as on ice or snow, always be careful
when depressing the accelerator pedal. Even with the EDL working, the drive
wheels can spin and reduce your ability
to control your car. Risk of crash!
- The increased safety afforded by EDL
does not mean that you can take safety
risks. Always adapt your dr iving style to
the road conditions and traffic situation.
0) Tips
If a fault occurs in the ABS, the EDL is also
not funct ion ing. Thi s is indicated by the
ABS war ning light ¢
page 16.
Anti-Slip Regulation System (ASR)
The Anti-Slip Regulation System prevents the
driven wheels from spinning when the car is
accelerating.
General notes
The Anti -Slip Regulation System (ASR) is inte­
grated in the electronic stabilization program
( E SP). When the vehicle starts up and acceler­
ates, the wheels are p revented from spinning
by adjusting the engine power to match the amount of grip available
from the road sur­
face.
How the system works
ASR performs automat ically, i .e. w ithout the
driver's intervention. With the aid of the ABS
sensors ¢
page 208, ASR monitors the speed
of the driven whee ls. If the whee ls start to
spin, engine torque is reduced automatica lly
until the tires find enough grip to lock onto
the road surface. The system is active across
the entire speed range.
The ASR works in conjunction with the ABS . If
a malfunction should occur in the ABS, the
ASR will also be out of act ion.
Activating
T he ESP is automatica lly activated when the
engine is started and it performs a se lf-test .
You can activate a deactivated ASR if required by pressing the
¢ page 204, fig. 196 button.
When it is act ivated, the message
ESP/ASR
on
appears briefly in the display .
Deactivating
You can deactivate the ASR if required by
pressing the button (for less than 3 seconds)
¢
page 204, fig . 196. With the ASR deactivat­
ed, the ESP check light comes on, see
¢
page 15 . The message ASR off appears in
the d isplay as well. The ASR can be deact ivat­
ed at any speed.
The ASR s hould normally be activated all the
time . Only in certain exceptional situations
when some slip is desirable does it make
sense to deact ivate the ASR . Examples :
- when driving with tire cha ins
- when driving in deep snow or on loose
ground and
- when rocking the vehicle loose after it has
become stuck.
When the abnormal situation is
over, you
shou ld activate the ASR again .

A WARNING ,~
The increased safety afforded by ASR does
not mean that you can take safety r isks .
Always adapt your driv ing style to the road
conditions and traffic situation .
@ Tips
To ensure that the ASR works properly, all
four wheels must be fitted with identical
tires. Any differences in rolling radius of
the t ires can cause the system to reduce
engine power when this is no t des ired. See
also ¢
page 263, New tires and replacing
tires and wheels.
Braking
General information
What affects braking efficiency?
Operating conditions and driving habits
The brakes on today's automob iles are st ill
subject to wea r, depend ing largely on operat ­
ing conditions and dr iving habits ~.&. . On ve­
h icles that are either driven mostly in stop­
and-go city traffic or are driven hard, the
brake pads should be checked by your a uthor­
ized Audi dealer more often than specified i n
the
Warranty & Maintenan ce booklet . Failure
to have your brake pads inspected can result
in red uced brake performance.
On steep slopes, you should use the brak ing
effect of the eng ine . This way, you p revent un­
n ecessary wea r on the brake system . If you
must use you r brakes, do not ho ld the bra kes
down continuously . Pu mp the b rakes at in ter ­
va ls.
Noises may occur when braking depending on
the speed, bra king for ce and outside condi­
tions s uch as temperatu re a nd humidity .
Moisture or road salt
If you are driving faster than 31 mph (SO km/
h) and the windsh ie ld w ipers are on, the brake
pads will briefly touch the b rake d iscs in regu­
l ar i nte rva ls so as to imp rove reaction t ime
Int ellig ent technolog y 207
when b rak ing on wet surfaces . You, the driver,
will not notice anything.
U nder certa in cond itions , fo r example, when
d riv ing th rough wa ter or very heavy ra in , or
even after washing your veh icle, the braking
effect can be reduced due to moisture (or in
freez ing cond itions ice) on the brake pads. A
few carefu l brake applications should dry off
the brake pads or remove any ice coatings.
The effectiveness of the brakes can be red uced
when the vehicle is driven on a salt-covered
road and the brakes are not used. Here too,
you should clean off accumulated salt coating
from brake discs and pads w ith a few careful
applications of the brake¢,&. .
Corrosi on
There may be a tendency for dirt to b uild up
on the brake pads and corros ion to form on
the d iscs if the car is not driven regularly or
o nly for short trips w ith litt le use of the
brakes .
If the brakes are no t used frequently, or if cor­
ros ion has formed on the discs, i t is adv isable
to clean off the pads and d iscs by braking
firmly a few times from a moderately high speed ¢,& .
Fault s in the brake s ystem
If you should notice a sudden increase in
brake pedal trave l, then one of the two brake
c ircuits may have failed ¢,&. .
Lo w br ake fluid le vel
Malfunctions can occ ur in the brake system if
the brake fluid level is too low. The brake flu id
level is monitored electronically.
Brake lining wea r status
Brake lining wear may be checked by visual in­
spection of the condition of the brake pads
through the open ings in the wheel. If neces­
sary, the wheel may be removed for th is in­
spection ¢
page 2 74, Changing a wheel.
•
•

208 Intellig ent technol ogy
,8. WARNING
- You should perform braking maneuvers
for the purpose of cleaning the brake
system only if road condit ions permit .
Other road users must not be put at r isk -
you may cause an acc iden t!
- Before descending a steep grade, reduce
speed and shift transmiss ion into a lower
gear or lower driving range. Do not ride
the brakes or hold the pedal down too long or too often . This cou ld cause the
brakes to get hot and diminish braking
efficiency.
- 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
stopp ing distance.
- Under certain climatic and operating
condit ions such as passing through wa­
ter, driving in heavy ra in or after wash ing
the vehicle, the effect iveness of the
brakes can be reduced. In winter, ice can
accumula te on the brake pads, linings,
discs and drums. Carefully apply brakes
for a test. Brakes will dry and ice coat­
ings will be cleaned off after a few care­
ful brake applications.
- Driv ing fo r an extended period of time on
salt -covered roads w ithout using your
brakes can also affect braking efficiency.
Clean off accumulated salt coating from
brake discs and pads w ith a few careful
brake applicat ions.
- If you damage the front spoiler, or if you
install a different spoiler, be sure the air
flow to the front brakes is not obstruct­ ed . Otherwise the brake system could
overheat reducing the effectiveness of
the ent ire brake system.
- Failure of one brake c ircuit will impair
the braking capability resulting in an in­ creased stopp ing distance. Avoid driv ing
the vehicle and have it towed to the near­ est authorized Audi dealer or qualified
workshop.
Brake booster
The brake booster adds extra braking power .
The brake booster works with vacuum pres­
sure which is created only when the engine is
runn ing
c> .&. .
,8. 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 damaged, the bra ke pedal mus t 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 un­ der braking .
-
The ABS contributes effect ively to vehicle con­
trol since it prevents the whee ls from
locking
when the brakes are applied. This means that
the ve hicle remains steerable and is less likely
to skid .
With AB S you do n ot need to pump the
brake . Ju st hold th e bra ke p edal down.
However, do not expect the ABS to s horten
braking distance under
all c ircumstances.
When driving on gravel or on new ly fallen
snow on top of icy surfaces, braking dis tance
may be even longer, therefore, under these
circumstances, it is especia lly important that
you drive s low ly and with great care.
How the ABS syst em work s
An automat ic check is made when a speed o f
about 12 mph (20 km/h) is reached. When
this happens, a pumping noise can be heard.
If an ind iv idual whee l begi ns to rota te too
s lowly in re lation to vehicle speed and tends
to lock, the ABS automatically reduces brake pressure to prevent that whee l from locking . .,..