2010 AUDI A5 COUPE brake

The system operates across the entire speed range in combination
with the ABS system. If the Anti -Lock Brake System (ABS) ma lfunc­
tions, the ESP wil l also shut down .
How the system works
The Anti -Lock Brake System (ABS), Electronic Differential Lock (EDU
and the Anti -Slip Regulation System (ASR) are integrated in the elec­
tronic stabilization program. In addition to the data provided by
th ese functions, the ESP control unit requires additional measure ­
ment data provided by high performance sensors . The rotational
speed of the vehicle about its vertica l axis, vehicle acceleration in
the fore-and-aft and lateral directions , the brake pressure, and the
steering angle are all measured.
The direction in which the driver wishes to travel is determined with
the aid of the steering angle and vehicle speed and is continua lly
compared with the actual behavior of the vehicle. If the two do not
match, for example, when the vehicle starts hydrop laning on a wet
road, ESP will automatically brake the appropriate whee l to correct
the prob lem.
The vehicle is then stabi lized by the forces acting on the whee l
during braking. If the vehicle is
oversteering (the vehicle turns too
sharply and the rear wheels slide toward th e ou tside of a curve), the
brakes are main ly app lied on the wheel that is on the outside of the
curve . In the case of a vehicle that is
understeering (the vehicle does
not turn sharply enough and pushes out of a curve), the brakes are
applied as needed on the wheel that is on the inside of the curve or
additional ly on the other wheels. An acoustic signal indicates when
ESP brake app lication cuts in=>&.
T he system operates across the entire speed range in combination
with the ABS system =>
page 238. If the Anti-Lock Brake System
(ABS) malfunctions, the ESP will be out of action as well.
Activating
When you turn on the engine, ESP will automatica lly be activated
and will perform a se lf-test. As soon as the test is comp leted, the
system is in norma l operating mode.
Controls and equip­
ment Safety first Vehicle operation
Intelligent technology
You
can activate a deactivated ESP or deactivated ESP/ASR if
required by pressing the::::>
page 234, fig. 215 ::::> page 234, fig. 214
button . When they are activated, the message
ESP /ASR on appears
briefly in the display .
Deactivating
The ESP should normally be activated al l the time. If necessary, you
can deactivate Anti -Slip Regu lation (ASR) or the Electronic Stabiliza­
tion Program (ESP) by pressing the button=>
page 234, fig. 215.
• Deactivating ASR: Tap the button . In certain exceptional situa­
tions (e .g. driving with tire chains), the Anti-Slip Regulation (ASR)
can be deactivated =>
page 236. The message ASR off appears in the
display as we ll.
• Deact ivating ESP/ASR Press the button for more than 3 seconds.
With the ESP/ASR deactivated, the indicator light comes on, see
=>
page 13. The message ESP switched off appears in the disp lay as
we ll.
& WARNING
The Electronic Stabilization Program is nevertheless subject to the
laws of physics . It is particularly important to pay attention to this
fact on wet and slippery roads. It is therefore important that you
always adapt your driving to the condition of the road and traffic
conditions. Do not allow the increased safety provided by the Elec­
tronic Stabilization Program system to lull you into accepting
additional safety risks. •
Electronic differential lock (EDL)
---------
The electronic differential lock monitors the rotational
speed of the drive wheels.
General notes
The electronic differential lock (EDU helps the car to start moving,
acc elerate and c limb a gradient on surfaces providing poor or
Vehicle care Do-it-yourself service Technical data

ll}JI Intelligent technology
---""'------------ ....::....:...:~---------------------------
almost no grip. Without EDL, this would be difficult, if not impos­
sible.
How the system works
The EDL operates automatically. It monitors the rotational speed of
wheels with the help of the ABS sensors=:,
page 238 . If a noticeable
slip is detected at the wheels (e.g. on slippery ground on one side),
the spinning wheels are braked and power is transferred to the
other wheels. This is done up to a speed of about 60 mph (100 km/h).
Noises from the brake system signal that wheel spin is being
controlled.
Driving off
When driving off, always 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 brake of the braked wheel from overheating if
subjected to excessive loads on this wheel, the EDL cuts out tempo­ rarily. The vehicle remains operational and behaves in the same way
as a vehicle without EDL.
As soon as the brake has cooled down, EDL switches on again auto ­
matically.
& 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 driving style to the road
conditions and traffic situation.
[ i] Tips
If a fault occurs in the ABS, the EDL is also not functioning . This is
indicated by the ABS warning light=:,
page 15. •
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 integrated in the electronic
stabilization program (ESP) . When the vehicle starts up and acceler ­
ates, the wheels are prevented from spinning by adjusting the
engine power to match the amount of grip available from the road
surface.
How the system works
ASR performs automatically , i.e. without the driver's intervention .
With the aid of the ABS sensors=:,
page 238, ASR monitors the
speed of the driven wheels. If the wheels start to spin, engine torque
is reduced automatically 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 action.
Activating
The ESP is automatically activated when the engine is started and it
performs a self-test . You can activate a deactivated ASR if required
by pressing the=:,
page 234, fig. 215 button. When it is activated,
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 234, fig. 215. With the ASR deactivated,
the ESP check light comes on, see=:,
page 13. The message ASR off ._

•
appears in the display as well. The ASR can be deactivated at any
speed.
The ASR should normally be activated all the time . Only in certain
exceptional situations when some s lip is desirable does it make
sense to deactivate the ASR. Examples:
• when driving with tire chains
• 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 should activate the ASR
again.
& WARNING
The increased safety afforded by ASR does not mean that you can
take safety risks. Always adapt your driving style to the road
conditions and traffic situation.
[ i ] Tips
To ensure that the ASR works properly, al l four wheels must be fitted
with identical tires. Any differences in rol ling radius of the tires can
cause the system to reduce engine power when this is not desired.
See also :::::>
page 299, "New tires and rep lacing tires and wheels" .•
Braking
General information
What affects braking efficiency?
Operating conditions and driving habits
The brakes on today's automobiles are still subject to wear,
depending large ly on operating conditions and driving habits:::::>& .
On vehicles that are either driven mostly in stop-and-go city traffic
or are driven hard, the brake pads should be checked by your autho-
Intelligent technology
rized Audi dealer more often than specified in the Warranty & Main­
tenance booklet.
Fai lure to have your brake pads inspected can
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.
Moisture or road salt
If you are driving faster than 31 mph (50 km/h) and the windshield
wipers are on, the brake pads will briefly touch the brake discs in
regular intervals so as to improve reaction time when braking on
wet surfaces. You , the driver, wil l not notice anything.
Under certain conditions, for example, when driving th rough 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 careful brake applications should dry off
the brake pads or remove any ice coatings .
The ef fectiveness of the brakes can be reduced when the vehicle is
driven on a salt -covered road and the brakes are not used . Here too ,
you should clean off accumulated sa lt coating from brake discs and
pads with a few carefu l applications of the brake:::::>&.
Corrosion
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 drive n regularly or
only for short trips with litt le use of the brakes .
I f 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:::::>& .
Faults in the brake system
If you shou ld notice a sudden increase in brake pedal travel, then
one of the two brake circuits may have failed:::::>&. ..,
I t •

ll}Jl __ ln_t _e_ ll-'"ig ...,_ e_ n_t _t_ e_ c_h _ n_o _ l_o _,.g= y,_ __________________________________________ _
Low brake fluid level
Ma lfu ncti ons can occ ur in th e brake system if the bra ke flu id leve l is
too low. The brake fluid leve l is monitored e lectronically.
Brake lining wear status Bra ke lining wear may be checked by visual inspection of the condi ­
t ion of the brake pa ds through the o pen in g s in t he wheel. If neces ­
sary, the wheel may be removed for this inspection=>
page 312,
" C hanging a whee l" .
& WARNING
• You should perform braking maneuver s for the purpose of
cleaning the brake system only if road cond itions permit . Other
road u sers must not be put at risk -you may cause an accident !
• Before des cending a steep grade , reduce speed and shift trans ­
mission into a lower gear or lower driving range. Do not ride the
brake s or hold the pedal down too long or too often . This could
c ause 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, p rem ature wear and in creased stopping distance .
• Under certain climatic and operating conditions such as
passing through water , driv ing 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.
Carefully apply brakes for a test. Brakes will dry and ice coatings
will be cleaned off afte r a few careful b rake appli cations .
• Driving for an extended period of time on salt -covered roads
without using your brakes can also affe ct braking effic ien cy. Clean
off accumulated salt coating from brake discs and pads with a few
careful 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 obstru cted .
Otherwise the brake system could overheat reducing the effe ctive­
ness of the entire brake system .
& WARNING (continued )
• Failure of one brake circuit will impair the braking capability
resulting in an increased stopping distance . Avoid driv ing the
vehicle and have it towed to the nearest authorized Audi dealer or
qu alified workshop. •
Brake booster
The bra ke boos ter adds e xtra bra king pow er.
Th e brake boost er wo rks wit h vacuum p ressu re wh ich 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 e xample when towing
your vehicle, or because the brake booster has somehow been 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}
A BS p revents t he wheels from lockin g up unde r braking.
The ABS co ntrib utes effectively to ve hic le c ont ro l since it preven ts
the whee ls from locking when the bra kes are app lied. Th is means
that the vehicle remains stee rable and is less l ikely to skid .
With ABS you do not need to
pump the brake. Just hold the brake
pedal down .
Ho wever , do not e xpect the AB S to sho rten braking d istance under
all circumstances. When driving o n grave l or on newly fallen snow
o n t op of icy su rfaces, b raking distance may be even lo nger, there ­
f ore, unde r these circumsta nces, it is especially impo rtan t th at you
drive slow ly and with great ca re. ._

How the ABS system works
An au tomatic check is made when a speed of about 12 mph (20
km/h) is reached. When this happens, a pumping no ise can be
heard .
I f an individua l wheel begins to ro tate too s low ly in relation to
vehic le speed and tends to lock, the ABS automatical ly reduces
b rake pressure t o preven t tha t whee l from locking.
This automatic adjustment process wil l cause a
slight vibration of
t he brake peda l and some noises to ale rt you tha t veh ic le sp eed
must be adapted to existing road and traffic conditions.
in. WARNING
Although the ABS is very effe ctive , always remember that braking
c apability is limited by tire traction. Always adjust your driving
speed a ccording to the road and traffi c conditions. Do not let the
extra safety afforded by the ABS tempt you into taking extra risks.
The ABS c annot overcome the laws of physics .
[ i J Tips
• I f ABS is not functioning properly, a warning l ight wil l come on .
See
~ page 15.
• I f a fau lt occurs in the ABS, the EDL is also not funct ioning. This
is indicated by the ABS warning light .
Brake assist
Brake assist is designed to achieve the optimum brakin g
effect.
B rake a ssist hel ps to in crease the eff ective b raking powe r an d t hus
to achieve a shorter stopping distance. If the driver presses the
br ake pe dal ve ry q uickl y, br ake a ss is t auto matically boo sts t he
braking force to the maximum lev el, up to the point where the anti ­
lock b ra ke function (ABS) intervenes to stop the wheels from
Controls and equip­
ment Safety first Vehicle operation
Intelligent technology
locking
. You shou ld then keep the brake pedal pressed until the
ve hic le has braked to the required spee d. Brake assist swi tches itse lf
off as soon as you release the brake pedal.
in. WARNING
Please remember that the accident r isk always increases if you
drive too fast , espe cially in corners or on a slippery road , or if you
follow the vehicle ahead of you too closely. Increa sed risk of an
accident cannot be compensated for even by brake as sist , so
always maintain a safe speed .•
Servotronic® -advanced power
steering system
The pow er st eer in g systems uses th e po we r of t he
run nin g eng ine to a llow prec ise s tee ring with lit tle eff ort.
The advanced S ervotronic ® power steering system senses the road
s p eed and electr onically a djusts power assis tance t o provide
comfortab le and safe steering response exactly matched to the
ve hicle speed .
Power steering wi ll n ot work if the eng ine is off. As a result, the
steering whee l wil l be hard to turn.
Th e power s teering flu id leve l is check ed during the sc hed uled
maintenance services .
0 Note
If there is an electronic ma lfunction, servotronic wi ll still function
like a conventi onal power s teer ing sys te m , pr ovi ding a constan t
steering support force that is no longer proportionate to the vehicle
speed. This is mo st noticeable when tu rning t he steering whee l at
low speeds {for examp le when parking), -more effort wi ll be
r equired than usual.
~
Vehicle care Do-it-yourself service Technical data

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New brake pads
Remember that new brake pads do not have a full braking
effect during the first 250 miles (400 kilometers) after they
are installed .
New brake pads have to be "burnished 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
New brake pad s don' t have the b est sto ppin g powe r and mu st b e
" brok en-in " during the initi al 100 to 15 0 mile s (150 t o 200 kil ome ­
t e rs) of n orm al cit y dri ving . You can co mpen sa te for thi s by
p re ss ing the brak e ped al mor e firmly . Th is also app lies la ter whe n
n ew pad s are in sta lled.
:J
Avoid damaging the vehicle
------------
When you are driving on poor roads , or over curbs, steep ramps ,
etc., make certain that low -lying parts such as spoilers and exhaust
system parts do not bottom out and get damaged.
This is especially true for vehicles with low -slung chassis (sports
chassis) * and fully loaded vehic les.
Driving through water on roads
Note the fo llowing to avoid vehicle damage when driving through
water , for example on flooded roads: • T
he water must not be any higher than the bottom of the vehicle
body .
• Do not drive faster than wa lking speed.
& WARNING
Aft er d riv in g throu gh water, m ud, s lus h, et c., the br akes ma y be
s low t o take eff ect beca use of w et br ake r otor s and p ad s. Dr y the
br ak es fir s t by br aking caref ully to r estor e th e full br aking effe ct.
0 Note
Vehicle components such as the engine, transmission, suspension
or e lectrica l system can be severe ly damaged by driving through
water .
[ i ] Tip s
• Check the depth of the water before d riving th rough it .
• Do not stop the vehic le, drive in reverse or switch the engine off
wh en driving through wat er.
• Keep in mind that oncoming vehicles may create waves that
raise the water level and make it too deep for your vehicle to drive
through safely.
• Avoid driving through salt water because it can cause
corrosion. •
Catalytic converter
It is very important that your emission control system
(catalytic converter) is functioning properly to ensure that
your vehicle is running in an environmentally s ound
manner.
- Always use lead -free gasoline ~ page 265, "F uel supply" . .,_

-Neve r run the tank down a ll the way to empty .
- Never put too much motor oil in your engine=>
page 275,
"Adding engine oil 'l:::r.".
-Never try to push- or tow-start your vehic le .
The catalytic converter is an efficient "clean -up" device built into the
exhaust system of the vehicle. The cata lytic converter burns many
of the po llutants in the exhaust gas before they are released into the
atmosphere.
The exclusive use of un leaded fuel is critica lly important for the life
of the catalytic converter and proper functioning of the engine .
& WARNING
• Do not par k or operat e the vehicle in areas w here the ho t
ex haust sys te m m ay come in conta ct w ith d ry grass, bru sh , fu el
s pill or other mater ial which can cause a fire.
• Do not ap ply ad diti ona l u nd erc o ati ng or ru stpro ofing on o r
n ea r th e ex haust m an ifold, exhau st pipe s, ca talytic convert er or
h eat s hield s. Dur ing drivin g, the sub sta nce use d for und ercoa ting
c ould o verh eat and cause a fir e.
0 Note
• Be aware that just one tank filling with le aded fue l wil l a lready
seriously degrade the performance of the catalytic converter.
• Do not exceed the correct engine oil level
~ page 275.
• Do not drive until the fuel tank becomes completely empty. The
engine could misf ire. Unburned fuel could also get into the exhaust
system and this could cause the catalytic converter to overheat.
• Do not turn off the ignit ion whi le the vehicle is moving.
• Do not continue to operate your vehicle under these conditions,
as otherwise fuel can reach the cata lytic converter. This could result
in overheating of the converter, requiring its rep lacement .
Controls and equip­
ment Safety first Vehicle operation
Dri
ving and environm ent
• To assure efficient operation of the Emission Control System:
- Have your vehic le maintained properly and i n accordance w ith
the service recommendations in your Warranty
& Maintenance
booklet .
- Lack of proper maintenance as wel l as improper use of the
vehic le wi ll impair the function of the em ission control system
and could lead to damage .
Even when the Emission Control System is operating properly, the
exhaust gas can have a sulfur-like exhaust gas smell under some
operating states . This depends on the su lfur content of the fuel
bei ng used. Using a different brand of fue l may help, or fil ling the
tank with lead-free super grade gasoline .
Operate your vehicle economically
and minimize pollution
General
Your personal style of driving will determine the economy
of your vehicle, as well as exhaust and noise levels .
Fuel economy, environmental impact, and wear on your engine,
brakes and tires largely depend on three factors:
• your persona l driving style
• operating conditions
• technica l limitations
If you anticipate what you need to do next and drive economica lly,
you can easily cut your fuel consumpt ion by 10-15 percent . This
section wil l give you some tips on how you can help the environ-
ment and your pocketbook . ...
Vehicle care Do-it-yourself service Technical data

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[ i ] Tip s
The consumption estimates as published by ENVIRONMENTAL
PROTECTION AGENCY (EPA) and Transport Canada may not corre ­
spond to your actua l consumption on the road, which wi ll vary
depending upon vehic le load and speed, road and weather condi­
tions, trip length, etc .•
Drive smoothly and keep a tookout ahead
Vehicles use the most fuel when they are accelerating.
- Avoid unnecessary accelerating and brak ing.
Vehicles use the most fuel when they are accelerating . If you antici ­
pate what is going to happen next, you will need to brake less and,
thus, accelerate less. Let the vehicle coast whenever possible -for
examp le when you see that the next traffic ligh t is red .
Avoid full thrott e
Driving at moderate speeds saves fuel and improves your
mileage.
- Try and keep we ll below your car's maximum speed.
Acce lerating gently reduces fuel consumption, engine wear, and
does not disturb the environment .
Fuel consumption, exhaust emissions and engine noise increase
disproportionately at high speeds. If you drive at approximate ly
three quarters of top speed, fuel consumption will be reduced by
one half. Never drive faster than the posted speed limit and weather
conditions permit. •
Reducing unnecessary idling
Even when your car is just idling it burns up fuel.
- Shut the engine off when you are not driving the vehicle.
-Do not warm up the vehicle by letting the eng ine run at
idle.
It makes sense to shut off the engine in traffic jams, when waiting
for trains to pass at rai lroad crossings, or at traffic lights that have
long waits on red. Turning the engine off for just 30-40 seconds
saves more fuel than is burned starting the engine again .
It takes a long time for the engine to warm up fully when it is
running at idle. However, wear and noxious emissions are especially
high when the engine is warming up. So you should drive away as
soon as you start the engine and avoid running at high rpms while
the engine is sti ll warm ing up .
0 Note
Do not leave engine idling unattended after starting. If warning
lights should come on to indicate improper operation, they would
go unheeded . Extended id ling a lso produces heat, which could
resu lt in overheating or other damage to the vehicle or other
property .•
Regular maintenance
A badly tuned engine unnecessarily wastes a lot of fuel.
- Have your vehicle serviced at regular intervals.
By having your vehicle regularly serviced by an authorized Audi
dea ler helps to ensure that it runs properly and economically. The
condition of your vehicle not only affects its safety and abi lity to
hold its value, it also affects
f ue l co nsu mpti on.
C hec k your o il e ach tim e y ou fill your ta nk.