2011 AUDI A5 COUPE brake

Intelligent t echnology
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Electronic differential lock (EDL)
The elec tronic differen tial lock monitors the rotational
speed of the drive wheels.
G en era l not es
The electronic differentia l lock (EDL) helps the ca r to sta rt moving,
accelerate and climb a gradient on surfaces provid ing poor or almost
no grip . W ithout ED L, this would be d iff icu lt, if not impossible.
How the sy stem works
The EDL operates automatically. It mo nitors the rota tional speed of
wheels with the help of the ABS sensors~
page 241. If a not iceab le
slip is detected at the wheels (e.g . on slippery g round on one side),
the spinn ing 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).
No ises from the brake system signal that wheel sp in is being
controlled.
Driv ing off
When d riving off, always be s ure 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.
O verheating of bra kes
To prevent the disc b rake of the bra ked wheel from ove rhea ting if
subjected to excessive loads on this wheel, the EDL cuts out tempo­
ra rily. The vehicle remains operat io nal and be haves in the same way
as a veh icle without EDL.
As soon as the brake has coo led down, EDL switches on again auto ­
matically.
& WARNING
• When ac ce le rating on s lippery surfa ce s, su ch as on ic e or snow,
alwa ys be ca reful when depre ssing the accele rator pedal. Even
& W ARNING (continue d)
with the EDL working , the dri ve wheels c an spin and reduce your
ability to contr ol your car . Ri sk of cra sh!
• The inc reased s afety afforded by E DL does not me an that you
can take safety ri sks. Alwa ys adapt your d rivin g style to the r oad
conditions and t raffic situation .
[ i ] Tips
If a fau lt occurs in the ABS, the EDL is also not funct ion ing. This is
ind ic a ted by the ABS warn ing light ~
page 17. •
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-Sl ip Regu lation System (ASR) is integrated in the electronic
stabiliza tion prog ram ( ESP) . When the ve hicle s tarts up and acceler­
ates, the wheels are prevented from sp inning by adjusting the engine
powe r to match the amount of g rip available from the road surface .
How the system works
ASR performs au toma tic a lly, i.e. witho ut the dr ive r's intervent ion.
With the aid of the ABS sensors~
page 241, ASR monitors the speed
of the driven wheels. If the whee ls start to spi n, eng ine torq ue is
reduced automatically unti l the tires find enough grip to lock onto
t he road s urface . The system is active across the en tire spee d range.
Th e ASR works in con ju nction with the ABS .
If a malfunction shou ld
occur in the ABS, the ASR wi ll also be out of action.
Act ivating
T he ESP is automatica lly activated when the engine is started and it
performs a self-test . You can act ivate a deact ivated ASR if required by _,,

Intelligent technology
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pressing the=> page 236, fig. 198 button. When it is activated, the
message
ESP/ASR on appears briefly in the display.
Deactivating
You can deactivate the ASR if req uired by press ing the button (for less
than 3 seconds) =>
page 236, fig. 198. With the ASR deactivated, the
ESP check light comes on, see=>
page 15. 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 slip is desirable does it make sense
to deactivate the ASR. Examp les:
• 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 sho uld 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, all four whee ls must be fitted
with ident ical tir es . Any differences in rolling radius of the tir es can
cause the system to reduce eng ine power when this is not desired .
See also =>
page 303, "New tires and replacing tires and wheels".
Controls and equip­
ment Safety first Vehicle operation
Braking
General information
What
affects braking efficiency?
Operating conditions and driving habits
The brakes on today's automobiles are still subject to wear,
depending la rgely on ope rating 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 authorized
Audi dealer more often than specified in the
Warranty & Mainte ­
nance booklet.
Failure to have your b rake pads inspected can result
in reduced brake performance .
On steep slopes, you should 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 continuously. Pump the
brakes at intervals.
Noises may occur when b rak ing depending on the speed, braking
force and outside cond itions such as temperatu re and humid ity.
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
regula r interva ls so as to improve reaction time when braking on wet
surfaces. You, the driver, will not not ice anything.
Under certain condit ions, for example, when driving through water or
very heavy rai n, or even after washing your vehicle, the braking effect
can be reduced due to moisture (o r in free zing conditions ice) on the
bra ke pads. A few careful brake applications should dry off the brake
pads or remove any ice coatings.
Th e effectiveness of the brakes can be reduced when the vehicle is
dr iven on a salt-covered road and the brakes are not used. H ere too,
you should clean off accumu lated salt coating from brake discs and
pads with a few careful applications of the brake=>&,.
Vehicle care Do-it-yourself service Technical data

Intelligent technology
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Corrosion
T he re may be a te ndency fo r d irt to build u p on the bra ke pads and
co rrosion to form on the d iscs if the car is not dr iven reg ularly o r only
for short trips with litt le use of the bra kes .
If the brakes a re not used freq uen tly, or if co rrosion has formed o n
the discs, it is advisable to clean off the pads and discs by braking
fir mly a few times from a mode rat ely h igh spee d~ & .
Faults in the brake system
If yo u sh ou ld noti ce a sudden increase in b rake peda l trave l, then one
of the two brake circu its may have failed~& .
Low brake fluid level
Ma lfunctions can occ ur in t he brake system if the brake fluid level is
t oo low. The bra ke f lu id level is moni tore d elec tron ically.
Brake lin ing wear status
Brake lin ing wear may be checked by v isua l inspect ion of the condi­
tion of the brake pads throu gh the open ings in the whee l.
If neces­
sary, the whe el may be removed fo r thi s insp ection~
page 3 16,
"Changing a w hee l".
& WARNING
• You should perform braking maneuvers for the purpose of
cleaning the brake system only if road conditions permit. Other
road users must not be put at risk - you may cau se an accident!
• Before descending a steep grade, reduce speed and shift trans­
mission into a lower gear or lower driving range. Do not ride the
brakes or hold the pedal down too long or too often . This could
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 stopping distance.
• Under certain climatic and operating condition s such as
passing through water , driving in heavy rain or after washing the
& WARNING (co ntinued )
vehicle, the effectiveness of the brakes can be reduced . In winter,
ice can ac cumulate on the brake pads, linings, dis cs and drums.
Carefully apply brakes for a test. Brakes will dry and ice coatings
will be cleaned off after a few careful brake appli cations.
• Driving for an extended period of time on salt-covered roads
without u sing your brakes can also affect braking efficiency . Clean
off accumulated salt coating from b rake discs and pads with a few
careful brake applic ations.
• If you damage the front spoiler, or if you install a different
spoiler, be sure the air flow to the front brakes i s 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 di stance. Avoid driving the
vehicle and have it towed to the nearest authorized Audi dealer or
qualified workshop.
n
Brake booster
The b roke boost er odds extra broking po wer.
The bra ke boos ter wor ks wi th v acuum pressure whi ch is crea ted o nly
when the eng ine is ru nning~ &.
& 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 brake pedal mu st be pressed considerably harder to
make up for the lack of booster assistance. •

Intelligent technology
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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
w heels from
locking whe n the brakes are applied . This means t hat t he
vehicle rema ins steerable and is less likely to skid.
With ABS you do not need to pump the brake. Ju st hold the brake
pedal down .
However, do not expect the ABS to shorten braking distance under all
circu mstances. When d riving on gr ave l o r on new ly falle n snow o n top
of icy s urfaces, braking distance may be even longer, therefore, under
t he se c ir cu mstances, i t is especially importa nt that you dr ive slowly
and with great care.
How the ABS system works
An a utomat ic check is made when a speed of about 12 mph (20 km/h)
is reached. When this happens, a pumping noise can be heard.
If an individ ual w heel beg ins to rotate too slow ly in relat ion to vehicle
speed and tends to lock, t he ABS automat ic al ly reduces brake pres­
sure to prevent t hat wheel from locking .
Thi s automatic adjustment process w ill cause a
slight vibrat ion of
t he bra ke ped al and some noises to aler t you th at vehicle s peed mus t
be adapted to existing road and traff ic conditions.
& WARNING
Although the ABS is very effective , always remember that braking
capability i s limited by tire traction . Always adjust your driving
speed acco rding to the road and traffic condition s. Do not let the
extra safety afforded by the ABS tempt you into taking extra risk s.
T he ABS cannot overcome the laws of physics .
Controls and equip­ ment Safety first Vehicle operation
(I] Tips
•
If ABS is no t fun ct io ni ng prope rly, a wa rning light will come on .
See
=> page 17.
• If a fault occurs in the A BS, the EDL is also not functioning . This is
indicated by t he ABS warn ing light .•
Brake assist
Brake assist is designed to achieve the optimum braking
effect.
Bra ke ass ist helps to i ncrease the effe ctive br aking power and thus to
achieve a shorte r stopping distance . If the d river presses the brake
peda l very quickly, brake assist automatically boosts the bra king
force to the max imum level, up to the po int whe re the anti-lock b rake
function (ABS) intervenes to stop t he wheels from locki ng . You
should then keep the br ake peda l pressed unti l the veh icle has braked
to the required speed . Brake ass ist switches itself off as soon as you
re le ase the br ake pedal.
& WARNING
Please remember that the accident risk always increases if you
drive too fast , especially in corners or on a slippery road , or if you
follow the vehicle ahead of you too clo sely. Increased ri sk of an
accident cannot be compensated for even by brake assist , so
alway s maintain a safe speed .•
Vehicle care Do-it-yourself service Technical data

Driving and environment
Driving and environment
The first 1,000 miles (1,500 km)
and afterwards
New engine
The engine needs to be run-in during the first 1,000 miles
(1,500 km) .
For the first 600 miles (1,000 kilometers):
-Do not use full throttle .
- Do not drive at engine speeds that are more than 2/3 of
t h e m axim um permitted RPM .
From 600 to 1,000 miles (1,000 to 1,500
kilometers):
-Speeds can gradually be inc reased to t he max imu m
per miss ib le road or engine speed.
During and after break-in period
- Do no t rev the engi ne up to high s peeds when it is cold.
This app lies w hether the t ra nsm ission is i n N (Ne utral) or
1n g ear.
After the break-in period
- Do not exceed max imum engi ne speed under any circum ­
sta nces.
- Ups hift into t he nex t higher gear
before reach ing t he red
area at t he end of the tachometer scale~
page 10.
During the first few hours of driving, the engine's interna l fr iction is
hig her th an later w hen all t he mov ing pa rts have been broke n in . How we
ll th is brea k-in process is done depe nds to a considerable ext ent on
the way the veh icle is driven dur ing the first 1,000 m iles (1,500 ki lo­
mete rs).
0 Note
E xtremely high engine speeds are au tom atic ally reduced. However,
these rpm limits are prog rammed fo r a n engine well run-in, not a new
eng ine.
~ For the sake of the environment
Do no t dr ive w it h u nne cessa rily h igh eng ine speeds - u pshift ing early
saves fuel, reduces noise and protects the environment. •
New tires
If you r ve hi cle is runni ng on new tires, d riv eve ryca refu llyf or
th e fi rst 350 miles (50 0 kilo m ete rs) aft er fitting .
& WARNING
New tires tend to be slippery and must also be "broken -in ". Be
sure to remember th is during the first 350 miles (500 kilome­
ters ). Brake gently. Avoid following closely behind other vehicle s
or other situat ions that might require sudden , hard braking. u
New brake pads
Remember t hat new brake pa ds d o not hav e a f ull braki ng
eff ect d uring t he fir st 2 50 miles (4 00 ki lomet ers) afte r they
ar e installed.
II-

____________________________________________ D_ r_ i_ v _i_,ng and environment
New brake pads have to be "b urn ished in" before they have opt imal
grab ~& -
Dur ing the break-in period, you sho uld avoid putti ng severe loads on
the brakes. Severe loads include, for example, sud den ha rd brak ing,
i n part icula r a t very high s peed s or, for e xam ple, on moun tain passes.
& WARNING
New brake pads don't have the best stopping power and must be
" broken-in " during the initial 100 to 150 miles (150 to 200 kilo­
meters ) of normal city driving . You can compensate for this by
p ressing the brake pedal more firmly . This also applies later when
new pad s are installed .•
Avoid damaging the vehicle
Whe n yo u are d riving on poor ro ad s, or ove r curbs, steep r amps, etc.,
ma ke ce rtain that low -lying parts such as spoilers and exhaust system
p arts do not bo ttom out and ge t damage d.
Th is is espec ia lly true for veh icles with low-slung chass is (sports
chassis)* and fully loaded vehicles .
a
Driving through water on roads
Note the fo llowing to avoid vehicle damage w hen drivi ng thro ugh
water, fo r examp le on flooded roa ds:
• The wate r must not be any h igher than the bottom of the vehicle
b ody .
• Do not dr ive faster tha n walk ing spee d.
Controls and equip­
ment Safety first Vehicle operation
& WARNING
After driving through water, mud
, slush, etc ., the brakes may be
slow to take effect because of wet brake rotors and pads. Dry the
brakes first by braking carefully to restore the full braking effect .
0 Note
Vehicle components such as the engin e, tra nsmission, sus pension or
elect rical system can be severe ly damaged by driv in g thro ugh water .
[ i ] Tips
• Check the depth of t he wate r before driving throug h it.
• Do not stop the vehicle, drive in reverse or switch the e ng ine off
w hen driving throug h wate r.
• Keep in m ind that o ncoming vehicles may c reate waves that raise
t he water leve l and make it too deep fo r yo ur vehicle to d rive throug h
safely.
• Avo id drivi ng t hroug h sa lt w at er bec ause it can cause cor rosio n.
Catalytic converter
It is very imp ortant that your emission contr ol syst em
(ca ta lytic convert er) is functioning pro p erly to ensur e
t h at your vehic le is runnin g in an environment ally s oun d
man ner .
- Always use lead -f re e gasoli ne~ p age 269 , "Fuel sup ply" .
- Never r un th e t ank down a ll the way to em pt y.
- Neve r pu t too muc h mo to r oil i n y our eng ine ~
page 279,
"Add ing eng ine oil
'l!:r." .
- Never try to p ush- or tow-start your veh icle.
Vehicle care Do-it-yourself service Technical data

Driving and environment
The catalytic converter is an effic ient ''clean-up" dev ice built into the
ex hau st system of the ve hicle. The c ata ly tic converter bu rns many of
the pollutants in the exhaust gas before they are released into the
atmosphere.
T he exclusive use of unleaded fuel is c rit ical ly import ant for the life of
the cata lytic converter and proper funct ioning of the eng ine.
& WARNING
• Do not park or operate the vehicle in areas where the hot
e xhaust system may come in contact with dry grass, brush, fuel
spill or other material which can cause a fi re.
• Do not apply additional undercoating or rustproofing on or
near the e xhaust man ifold , exhaust pipes , catalytic converte r or
heat shields . During driving, the substance used for undercoating
could overheat and cause a fire.
0 Note
• Be aware that j ust one tank filling with leaded fuel will already
seriously degrade the performance of the ca talytic conve rter.
• Do not exceed the correct engine oil level =>
page 279.
• Do not dr ive until the fuel tan k becomes complete ly empty . The
engine could misfire . Unburned fuel cou ld also get into the exha ust
system and th is cou ld cause the catalyt ic converter to overheat .
• Do not tu rn o ff the igni tion while t he vehi cle is moving.
• Do not contin ue to operate your vehicle under these conditions, as
otherwi se fuel c an reac h the c atal ytic conve rter. This co uld res ult in
overheat ing of the converter, requir ing its replacement.
• T o ass ure eff icient ope ra ti on of the Emiss ion Cont rol System:
- Have your vehicle maintained properly and in accordance with
the se rvice recommendations in your Wa rranty
& M aintenance
booklet. -
Lack of proper maintenance as well as improper use of the
veh icle w ill impair the f unc tion of the emiss io n con trol sys te m an d
co uld lead to damage.
<£> For the sake of the environment
Even when the Emiss ion Control System is operating p roperly, the
exhaust gas can have a s ulfur -like exhaust gas smell under some
operat ing states . This depends on the sulfur content of the fu el being
used. Using a different brand of fuel may help, or filling the tank with
lead -free supe r grade gasoline. •
Operate your vehicle economically
and minimize pollution
General
Your personal style of d riving will det ermine the economy
of your vehicle, as well as exhaust and noise le vels.
Fuel eco nomy, e nvir onmenta l impa ct, and wea r o n your eng ine ,
brakes and tires large ly depend on three factors:
• your persona l driving style
• operat ing cond itions
• t echni cal lim itat io ns
If you anticipate what you need to do next and drive economica lly,
you c an easily cut yo ur fuel consum ptio n by 10- 15 pe rcen t. T his
sect io n w ill give you some tips on how you can he lp the env ironment
and your pocket book.
[ i ] Tips
Th e consumption estimates as pub lished by ENV IRONMENTAL
PROTECTIO N AG ENCY ( EPA) and Transport Ca nada may not co rre­
spond to your act ua l cons umption on the road, which will vary

Driving and environment
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depending upon vehicle load and speed, road and weather conditions,
trip length, etc. •
Drive smoothly and keep a lookout ahead
Vehicles use the most fuel when they are accelerating .
-Avoid unnecessary accelerating and braking.
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
example when you see that the next traffic light is red.
Avoid full throttle
Driving at moderate speeds saves fuel and improves your
mileage.
- Try and keep well below your car's maximum speed.
Accelerating gently reduces fuel consumption, engine wear, and does
not disturb the environment .
Fuel consumption, exhaust emissions and eng ine noise increase
disproportionately at high speeds . If you drive at approximately three
quarters of top speed, fuel consumption will be reduced by one half.
Never drive faster than the posted speed limit and weather condi­
tions permit. •
Reducin~ unnecessary idling
Even when your car is just idling it burns up fuel.
-Shut the engine off when you are not driving the vehic le .
- Do not warm up the vehicle by letting the engine run at
idle.
Controls and equip­ ment Safety first Vehicle operation It makes sense to shut off the engine in traffic jams, when waiting for
trains to pass at railroad 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 t ime for the engine to warm up fully when it is running
at idle. However, wear and noxious emissions are especia lly high
when the eng ine is warming up. So you should dr ive away as soon as
you start the engine and avoid running at high rpms while the engine
is still warming 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 idling also produces heat, which could result in
overheat ing or other damage to the vehicle or other property. •
Regular maintenance
A badly tuned engine unnecessarily wastes a lot of fuel .
- Have your vehic le serviced at regular intervals .
By having your vehicle regularly serviced by an authorized Audi dealer
helps to ensure that it runs properly and economically . The condit ion
of your vehicle not on ly affects its safety and ability to hold its val ue,
it also affects fuel consumption.
Check your oil each time you fill your tank.
Th e amount of oil used is related to engine load and speed.
It is normal for the oil consumption of a new engine to reach its
lowest value after a certain mileage has been driven.
You must dr ive your veh icle about 3,000 miles (5,000 kilometers)
before you can properly assess oi l consumption .
Thi s also applies to fuel consumption and eng ine output.
Vehicle care Do-it-yourself service Technical data