brakes AUDI TT ROADSTER 2017 Owners Manual

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If brake assist (brake booster) is not working, you
have to use much more force when braking the
vehicle. See an authorized Audi dealer or author­
ized Audi Service Facility for assistance.
1111 (USA models) /. (Canada models)
Brakes: malfunction! Stop vehicle safely
If the ABS indicator light til) (USA models) /
¢cj (Canada models), the ESC indicator light J.il
and the brake system indicator light 1111 (USA
models)/ . (Canada models) turn on and this
message appears, then the ABS, ESC and braking
distribution are malfunctioning¢ ,&..
Drive to your authorized Audi dealer or author­
ized Audi Service Facility immediately to have the
malfunction corrected ¢
&.
1111 (USA models) /. (Canada models) Park­
ing brake: malfunction! Safely stop vehicle.
Please contact Service
- If the indicator light and the message appear
when the vehicle is stationary or after switch­
ing the ignition on,
check if you can release the
parking brake . If you cannot release the park­
ing brake, see your authorized Audi dealer or
authorized Audi Service Facility . If you can re­
lease the parking brake and the message still
appears, see an authorized Audi dealer or au­
thorized Audi Service Facility immediately to
have the malfunction corrected .
- If the indicator light and message appear
while
driving,
the hill start assist or emergency brak­
ing function may be malfunctioning. It may not
be possible to set the parking brake or release
it once it has been set. Do not park your vehicle
on hills. See an authorized Audi dealer or au­
thorized Audi Service Facility for assistance.
(USA models): if the
1111 and EiJ indicator
lights turn on together, have the brake system
checked immediately by an authorized Audi deal­
er or authorized Audi Service Facility
¢page 14.
There is also a warning tone when the lights turn
on.
Instruments and indicator lights
A WARNING
- Read and follow the warnings in
¢ page 235, Working in the engine com­
partment
before opening the hood and
checking the brake fluid level.
- If the brake system indicator light does not
turn off or it turns on while driving, the
brake fluid level in the reservoir is too low,
and this increases the risk of an accident.
Stop the vehicle and do not continue driv­
ing. See an authorized Audi dealer or au­
thorized Audi Service Facility for assistance.
- If the brake system indicator light turns on
together with the ABS and ESC indicator
lights, the ABS/ESC regulating function may
be malfunctioning. Functions that stabilize
the vehicle are no longer available. This
could cause the rear of the vehicle to
swerve, which increases the risk that the ve­
hicle will slide . Drive carefully to the nearest
authorized Audi dealer or authorized Audi
Service Facility and have the malfunction
corrected.
PARK /(®)/¢), Electromechanical parking
brake
If the -(USA models)/ . (Canada models)
indicator light turns on, the parking brake was
set.
- (USA models) I. (Canada models) Park­
ing brake: caution! Vehicle parked too steep
If the indicator light blinks and the message ap­
pears, there is not enough braking power to se­
cure the vehicle. The brakes have overheated. The
vehicle could roll away even on a small incline.
- (USA models) I. (Canada models)
Please press brake pedal to release parking
brake
To release the parking brake, press the brake
pedal and press the~ button at the same time,
or start driving with hill start assist¢
page 63,
Starting from a stop.
Jlj Parking brake: malfunction! See owner's
manual
11

Instruments and indicator lights
There is a malfunction in the parking brake . Dr ive
to an authorized Audi dealer or authorized Audi
Serv ice Facility immediately to have the malfunc­
tion corrected .
1ij Parking brake: ma lfunction! Safely stop ve­
hicle . Ple ase contact Se rvice
There is a malfunction in the parking br ake. Dr ive
to an author ized Audi dealer or author ized A udi
Service Facility immediately to have the mal func­
tion corrected.
ltJil:Jl:)jf;U~ (USA model s) /
6] (Canada model s)
Ple ase rele ase p arking brake .
Re lease the park ing brake if this message ap­
pea rs .
IZJill :ljfj:0 (USA mod els) /
6] (C an ad a model s)
Parking brake auto rel ea se unavail able
If th is message appears, press the brake pedal
first and then release the parking brake.
IZ,i!;t:Jjf;U~U SA mod els ) /
K@) Parking b rak e: c aution! Vehicle pa rked too
steep
If the indicator light blinks and the message ap­
pears, there is not enough braking power to se­
cure the vehicle. The brakes have overheated. The
veh icle could roll away even on a small incline.
ltJ ilJ :jjJ:1:0 (USA model s) /
K@j Parking b rak e is appl ied
I f th is message appears, press the bra ke pedal
fi rst and then release the pa rking brake if neces­
sary .
(D Tips
For add it iona l information on the park ing
brake, see ¢
page 62.
-L Cooling system
• Turn off engine and check coolant le vel
The coolan t leve l is too low.
Do not cont inue drivi ng and switch the engine
off . Check the coolant level¢
page 241 .
12
-If the coo lant level is too low , add coolant
¢
page 241. Only continue driving once the in­
dicator light turns off.
• Coo la nt temperature : to o high . Let engine
run with veh icle stationa ry
Let the engine ru n at idle fo r a few minutes to
cool off, until t he ind icator lig ht t urns off .
- If the ind icator light does not turn off , do not
cont inue driving the veh icle. See an authorized
Audi dea le r or authorized Audi Service Facility
for assistance.
.&_ WARNING
- Never ope n the hood if you can see or hea r
steam or coo lant escaping from the engine
compartment. This increases the risk of
burns. Wait until you no longer see or hear
steam or coolant escaping.
- The engine compartment in any vehicle can
be a dangerous area. Stop the engine and
allow it to cool before working in the engine
compartment . Always follow the informa­
tion found in
Q page 235, Working in the
engine compartment .
(D Note
Do not continue driv ing if the . indicator
light turns on as this increases the risk of en­
g ine damage.
"I!::?': Engine oil pressure
• Turn off engin e. Oil pre ssure to o low
Stop the engine and do not continue driving. Check the eng ine oil level¢
page 239.
-If the eng ine oi l level is too low, add engine oil
¢
page 239 . Only continue driving once the in­
dicator light turns off.
-If the engine oi l level is correct and the indica­
tor light still blinks, turn the engine off and do
not continue dr iving . See an author iz ed Audi
dea ler or authori zed Audi Service Facility for as-
sistance . .,.

Instruments and indicator lights
Drive to an autho rized Aud i dea ler or a uth orized
Aud i Service Facility immediately to have t he
malfunct ion corrected .
11111 Engine start sy stem: malfunction! Plea se
contact Service
There is a malfunction in the eng ine start ing sys­
tem.
Dr ive to an authorized Aud i deale r or authorized
Aud i Serv ice Facility immediately to have the
malfunct io n corrected.
f;. 11) Electronic stabilization control (ESC )
and
( 8) anti-lock braking system (ABS )
If the DJ indicato r light b links whi le driving, the
E SC or ASR (Anti-Slip Reg ulation) is actively reg u­
lating.
If the
DJ indicato r light turns on, the system has
switched the ESC off . In this case, you can switch
the ignition off and then on to switch the ESC on
again. The indicator light turns off when the sys­
tem is functioning fully.
Stabili zation control (E SC ): sport. Warning! Re­
duced stability
I f t he II indicator light turns on, ESC sport
mode was switched on using the
I -" O FF I button
¢
page 89 . You can turn the ESC on again by
press the
I -" OFFI b utton again.
Stabilization control (E SC): off. Warning ! Re­
duced stabil ity
I f t he II indicato r light tur ns on, t he ESC was re­
s tricted or switched off using the
I ~ OF FI button
¢ page 89 . The message ESC OFF also appears .
You can turn the ESC on again by press the
I -" OF FI button again .
The system switches on whe n the ign ition is
sw itched on. The
II indicato r light turns off
when the system is functioning fully .
Stabilization control (ESC ): malfun ction ! Se e
owner 's manual
Stabilization control (ESC / AB S): malfun ction!
See owner' s manual
ABS: malfunction! See ow ner 's manual
14
If the DJ indicator light and the ABS indicator
li ght
rJE (USA mode ls)/ ti] (Canada models)
turn on and this message appears, there is a mal­
funct ion in the ABS system or electronic differen­
tia l lock. This also causes the ESC to malfunction .
The brakes still function with their normal power, but ABS is not active .
Drive to an authorized A udi dealer or authori zed
Audi Service Facility immediate ly to have the
malfunction corrected .
,&. WARNING
If the ... (USA models) JII (Canada mod­
e ls) brake system indicator light turns on to­
gether with the ABS and ESC ind ic a tor lights,
the ABS/ESC regulating function may have
failed. Functions that s tabilize the vehicle are
no longer avai lab le . This could cause the vehi ­
cle to swerve, which increases the risk that
the vehicle will slide. Drive carefully to the nearest authorized Aud i dea ler or authorized
Audi Service Fac ility and have the malfunction
corrected .
0) Tips
For additional informat ion on ESC and ABS,
see¢
page 88.
(0) Brake pads
&J Brake pads: wear limit reached . You can con­
t inue driv ing . Please contact Se rvice
The brake pads are worn.
Drive to an authorized A udi dealer or authorized
Audi Se rvice Facility immediate ly to have the
brake pads checked.
App lies to : USA mode ls
The &J i ndicator lig ht turns on together with the
... indicator light
!f Safety systems
The E,I indicator lig ht monitors the safety sys­
tems.

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Driving
General information
Breaking in
A new vehicle must be broken in, and the break­
in distance should be 1,000 mi les ( 1,500 km). Do
not drive at speeds that w ill exceed
2/3 of the
maximum permitted engine speed
(RPM) for the
first 600 miles (1,000 km) , and avoid full accel­
eration during this period . You may gradually
start increasing the
RPM and the speed between
600 miles (1,000 km) and 1,000 miles (1,500
km).
During the first hours of use, the engine has a
higher internal friction than later on when all
moving parts have settled into place with each
other.
How the vehicle is driven during the first 1,000
miles (1,500 km) also affects the engine quality.
Drive at moderate engine speeds after the initial
break-in per iod, part icularly when running a cold
engine . This will reduce engine wear and improve
the mileage .
Do not drive at too low of an engine speed (rpm).
Shift down if the engine stops running "smooth­
ly" . Extremely high eng ine speeds are automati ­
cally reduced .
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
vehicles.
Driving through water on roads
Note the following to reduce the risk of vehicle
damage when driving through water, for examp le
on flooded roads :
- The wate r must not be any higher than the bot­
tom of the vehicle body .
Driving
- Do not drive faster than walking speed.
A WARNING
After driv ing through water or mud, the effec­
tiveness of the brakes may be reduced due to moisture on the brake rotors and brake pads.
A few careful brake applications should dry
off the brakes .
(D Note
Vehicle components such as the engine,
transmission, suspension or electrical system
can be severely damaged by driving through
water.
(D Tips
- Determine the depth before driving through
water.
- Do not stop the vehicle, drive in reverse or
switch the engine off when driving through
water.
- 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 dr iving through salt water, because
this can cause corrosion.
Economical and environmentally-friendly
driving
T he amount of fuel consumpt ion, the environ­
menta l impact and the wear to the engine,
brakes and tires depends mostly on your driving
style. With an anticipatory and economic driving
style, fuel consumption can be reduced by ap­
proximately 10-15%. The following tips will help
you conserve the environment and your money at
the same time .
Anticipatory driving
A vehicle uses the most fuel when accelerating.
When you drive with anticipation, you do not
need to brake as often and so you accelerate less.
When possible, let your vehicle coast with a
gear
engaged -
for example, when you notice that the
next traff ic light is red . .,,.
57

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Starting on a hill
"' Set the parking brake .
"'With the driving gear selected, press the accel­
erator pedal carefully. The parking brake will
release automatically if your safety belt is fas­
tened .
Under certain circumstances, such as driving in
the mountains, it may be useful to switch tempo­
rarily to the manual shift program in order to
manually adjust the gears to the driving condi­
tions ¢
page 68.
When parking on a level surface, simply place the
selector lever in the P position. On inclines, acti­
vate the parking brake first and then move the selector lever to the P position ¢
page 62. This
prevents the locking mechanism from being
loaded too heavily and will make it easier to
move the selector lever out of the P position .
.8, WARNING
- The vehicle can roll even when the engine is
switched off.
- Unintended vehicle movement can lead to
serious injuries.
- Never leave your vehicle with the engine
running while in gear.
If you must leave
your vehicle when the engine is running, set
the parking brake and move the selector lev­
er to the P position.
- Power is still transferred to the wheels
when the engine is running at idle. To pre­
vent the vehicle from "creeping", you must keep your foot on the brake when the en­
gine is running and the selector lever is in
the D, Sor R position or "tiptronic" mode is
selected.
- Do not inadvertently press the accelerator
pedal when the vehicle is stationary. Other­
wise the vehicle will start to move immedi­ ately, even if the parking brake is set. This
could result in a crash.
- Do not press the accelerator pedal when
changing the selector lever position while
the vehicle is stationary and the engine is running .
Driving
-Never engage the R or P selector level posi­
tions while driving. It could cause a crash.
- Before driving down a steep slope, reduce
your speed and shift into a lower gear with "ti ptronic".
- Do not ride the brakes or press the brake
pedal too often or too long when driving
downhill. Constant braking causes the brakes to overheat and substantially re­
duces braking performance, increases brak­
ing distance or causes complete failure of
the brake system.
- If you must stop on an incline, always hold
the vehicle in place with the foot brake or
parking brake to prevent it from rolling
back .
- Never hold the vehicle on an incline with a
slipping clutch. The clutch opens automati­
cally when it becomes too hot from the
overload. The
mJ indicator light turns on
and a message appears ¢
page 70 when
the clutch is overloaded.
- If the engine must run while you are work­
ing in the engine compartment with the
hood open, make sure a gear is not engag­
ed. The selector lever must be firmly in the
P position and locked in place and the park­
ing brake must be set ¢
page 235. Other­
wise, the vehicle could begin moving when
increasing the engine speed, even with the
parking brake set .
(!) Note
- When stopping on an incline, do not try to
hold the vehicle in place by pressing the ac­
celerator pedal while a driving gear is se­
lected. This can cause the automatic trans­
mission to overheat and can damage it. Set
the parking brake or press the brake pedal
to prevent the vehicle from rolling.
- Allowing the vehicle to roll when the engine
is stopped and the selector lever is in the N
position will damage the automatic trans­
mission because it is not lubricated under
those circumstances.
67

Driving - The transmission can overheat and be dam­
aged under certain driving and traffic condi­
tions such as frequent starts, creeping for a
long time, or stop -and-go traffic. When the
@] or. indicator light turns on, stop the
vehicle at the next opportunity and let the
transmission cool
r=;, page 70 .
-Allowing the vehicle to roll when the engine
is stopped will damage the S tronic trans ­
mission because it is not lubricated
¢ page 286, Towing with a tow truck.
@ Tips
For safety reasons, the parking brake is re­
leased automatically only when the driver's
safety belt is engaged in the buckle.
Hill descent control
The hill descent control system assists the driver
when driving down hills .
Hill descent control is ac tivated when the selec­
tor lever is in the Dor S position and you press
the brake pedal. The transmission automatically
selects a gear that is suitable for the hill. Hill de­
scent control tries to maintain the speed ach­
ieved at the time of braking, within physical and
technical limitations.
If may still be necessary to
adjust the speed with the brakes. Because hill de ­
scent control cannot shift down farther than 3rd
gear, it may be necessary to shift into tiptronic
mode in very steep areas. In this case, shift man­
ually into 1st or 2nd gear in tiptronic mode to
use the engine's braking force to relieve the
brakes .
Hill descent control switches off once the hill lev­
els out or you press the accelerator pedal.
On vehicles with a cruise control system*
¢ page 72, hill descent control is also activated
when the speed is set.
A WARNING
Hill descent control cannot overcome physical
limitations, so it may not be able to maintain
a constant speed under all conditions. Always
be ready to apply the brakes.
68
Shifting manually (tiptronic mode)
The tiptronic mode allows the driver to shi~ the
gears manually .
Fig. 73 C enter conso le: sh ift ing ma nuall y wi th the selecto r
lever
Fig. 74 Steering whee l: ma nual shifting wit h the shift pad­
dles•
Shifting with the selector lever
You can shift into tiptronic mode while stationary
and whi le driving.
.,. To shift into tiptronic mode, push the selector
lever from the D/S setting to the right in the
tiptronic shift gate. Once the transmission has
sw itched modes, the selector lever position
M
is shown in the Infotainment system display
r=;, page 64, fig. 70 . For example M4 means the
fourth gear is engaged .
.,. To shift up a gear, tap the selector lever for­
ward
G) ¢ fig. 73.
.,. To shift down a gear, tap the selector lever to
back
0 .
Shifting with the shift paddles*
You can operate the shift paddles in the D/S or
M
(tiptronic shift gate) selector lever positions.
.,. To shift up one gear, tap the shift paddle
0
r=;, fig. 7 4.

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speed and the distance between your vehi­
cle and other vehicles.
- For safety reasons, cruise control should not
be used in the city, in stop-and-go traffic, on
winding roads and when road conditions are
poor (such as ice, fog, gravel, heavy rain and
hydroplaning), because this increases the
risk of a n accident.
- Switch the cruise control off temporarily
when driving in turning lanes, highway exits
or in construction zones.
- Please note that unconsciously "resting"
your foot on the accelerator pedal prevents
the cruise control from braking. This is be­
cause pressing the accelerator pedal over­
rides the cruise control system.
- If a brake system malfunction such as over­
heating occurs when the cruise control sys­
tem is switched on, the braking function in
the system may be switched off . The rest of
the cruise control system functions remain
active as long as the
@;\1)~14 (USA models) I
ill (Canada models) indicator light is on.
@ Tips
The brake lights turn on when the brakes are
app lied automatica lly.
Changing speed
Applies to: veh icles with c ruise control system
.. To increase/decrease the speed in increments,
briefly
tap the lever toward 010 Q page 72,
fig. 77 up/down to the first level.
.. To increase or decrease the speed in incre ­
ments,
tap the lever toward 010 Q page 72,
fig. 77 up/down to the second level.
.. To increase or decrease the speed quickly ,
hold
the leve r in the 0 / 0 direction until the de­
sired speed is reached .
Overriding the speed
Applies to: veh icles with c ruise control system
You can press the accelerator pedal down to in­
crease your speed, for example if you want to
pass someone. The speed you set earlier wi ll re-
Assist
sume as soon as you release the acce lerator ped ­
al.
However, if you are exceeding the stored speed
by a considerable amount for a long time, the
cruise contro l system will temporarily switch off.
The
(ff;ji )~i4 (USA mode ls) Iii (Canada mode ls) in­
dicator light in the instrument cluster turns off
and the stored speed is maintained.
Preselecting the speed
Applies to : vehicles with cruise control system
You can pre-select your desired speed when the
vehicle is stationary.
.. Switch on the ignition.
.. Pull the lever into position (!)
Q page 72,
fig. 77.
.. To increase or decrease the speed, tap the lever
toward
0 10 .
This function makes it possible, for example, to
save the speed you want before driving on the
highway . Once you are on the expressway, acti­
vate the cruise control system by pulling the lev­
er into position (!).
Switching off
Applies to: vehicles with cruise control system
Temporary deactivation
.. Press the brake pedal, or
.. Press the lever toward@(not locked into
place)
Q page 72, fig. 77.
Switching off completely
.. Press the lever into position @(clicked into
place), or
.. Switch the ignit ion off .
The speed you stored will be maintained if the cruise control has been switched off temporarily .
To resume the stored speed, release the brake or
clutch pedal and pull the lever to position (!).
Switching the ignition off will erase the stored
speed .
73

Intelligent Technology
Intelligent Technology
Electronic stabilization
control (ESC)
Description
Electronic Stabilization Control (ESC) supports
driver safety.
It reduces the risk of slipping and
improves driving stability. ESC detects critical sit­
uations such as the vehicle oversteering and un­
dersteering or the wheels are spinning. The vehi­
cle is stabilized by applying the brakes or reduc ­
ing engine torque. When ESC engages, the
G1 in­
dicator light blinks in the instrument cluster.
The following systems are integrated in the ESC:
Anti-lock braking system (ABS)
ABS prevents the wheels from locking when brak­
ing. The vehicle can still be steered even during
hard braking. Apply steady pressure to the brake
pedal. Do not pump the pedal. A pulsing in the
brake pedal indicates that the system is acting to
stabilize the vehicle .
Brake assist system
The brake assist system can decrease braking dis­
tance. It increases braking power when the driver
presses the brake pedal quickly in emergency sit­
uations . You must press and hold the brake pedal
until the dangerous situation is over .
Anti-slip regulation (ASR)
ASR reduces engine power when the drive wheels
begin spinning and adapts the force to the road
conditions. This makes it easier to start, acceler­
ate and drive up hills .
Electronic differential lock (EDL)
EDL applies the brakes to a wheel that starts
spinning and transfers the drive power to the
other driving wheels. This function is not availa­
ble at higher speeds.
In extreme cases, EDL automatically switches
off
to keep the brake on the braked wheel from over­ heating. The vehicle is still working correctly. EDL
will switch on again automatically when condi­
tions have returned to normal.
88 Steering
recommendation
The ESC helps to stabilize the vehicle by changing
the steering torque.
Selective wheel torque control
Selective wheel torque control is used when driv­
ing on curves. The front whee l on the inside of
the curve or both wheels on the inside of the
cu rve are braked selectively as needed. This al­
lows more precise driving in curves. The applica ­
ble system may not activate when driving in wet
or snowy conditions.
A WARNING
- The ESC and its integrated systems cannot
overcome the limits imposed by natural physical laws. This is especially important
on slippery or wet roads. If the systems be­
gin acting to stabilize your vehicle, you
should immediately alter your speed to
match the road and traffic conditions. Do
not let the increased safety provided tempt
you into taking risks. This could increase
your risk of a collision .
- Please note the risk of a collision increases
when driving fast, especially through curves
and on slippery or wet roads, and when driv­ ing too close to objects ahead. The ESC and
its integrated systems cannot always pre­
vent collisions -there is still a risk of acci­
dents!
- Press the accelerator pedal carefully when
accelerating on even, slippery surfaces such
as ice and snow. The drive wheels can spin
even when these control systems are instal­
led and this can affect driving stability and
increase the risk of a collision.
(j) Tips
-The ABS and ASR only function correctly
when all four wheels have a similar wear
condition. Different tire sizes can lead to a
reduction in engine power.
- You may hear noises when the systems de­
scribed are working.

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Intelligent Technology
Switching on and off
ESC turns on automatically when you start the engine.
Fig. 95 Upper center console, fj. OFF b utton
The ESC is designed to function in levels . Depend­
ing on the level selected, the ESC stabilization funct
ion is limited or switched off. The amount of
stab ilizat ion control will d iffer depending on the
level.
T he following examples are unusua l situat ions
where it may make sense to switch sport mode
o n in order to allow the wheels to spin:
- Rocking the vehicle to free it when it is stuck
- Dr iving in deep snow or on loose g round
- Dr iving with snow chains
Sport mode on ESC/ASR off Sport mode off or ESC/ ASR
on
Behavio r
The ESC and ASR stabiliza- The stabilization funct ion is The f ull stabilization func-
tion funct ions are limited not availab le
¢ .&. . ESC and tion of the ESC and ASR is
¢ .&.. ASR are switched off. availab le aga in.
Operation Press the l.e OFFI but ton Press and hold the l.e OFFI Press the l .e OFFI but ton
briefly. button longer than 3 sec- aga in .
onds .
Indicator II turns on. II and l*JJ•U~* tu rn on. II turns off or II and
liil•IH * tu rn off. light s
Messages Stab
ilization control (ESC ): Stab ilization con trol (ESC ): Stab ilization cont rol
sport . Warning! Reduced off. Wa rning! Reduced sta -(ESC): on
stability
A WARNING
Y ou shou ld only swit ch spo rt m ode on or
switch ESC/ ASR off if your driving ab ilities
a n d roa d conditions permi t.
bility
- T he s tabiliz ation func tion is li mite d when
s por t mode is sw itched on. The driving
whee ls co uld spi n and the vehicle cou ld
swerve, espec ially on s lick or s lippery roa d
surfaces.
- There is no vehicle stabi lization when ESC/
ASR are switched off.
(D Tips
Wh en the cruise cont rol sys tem is swi tched
on, ESC/ ASR can not be swi tched o ff or sport
mo de can not be swit ched on .
Brakes
New brake pads
New brake pads do not achieve their fu ll braking
effect duri ng the first 250 mi (400 km) . They
must be "broke n in" first. Howeve r, you can com­
pensate fo r th e slightly reduced braking force by
pressing f irm ly on the b rake pedal. Avo id heavy
bra king d urin g the brea k-in pe riod .
Wear
Brake pad wear depends largely on the way the
vehicle is driven and on operating conditions.
T his is espec ially true if yo u are dr iv ing freq uently
in t he ci ty and o n curves or w ith a spo rty d rivi ng
sty le.
IJI,,
89

Intelligent Technology
Operating nois e
Noises may occur when br aking depend ing on the
speed, b raking force and outside cond itions such
as tempe rature and humidity.
Effect of water and road salt
I n ce rtain s ituations, for example after driving
through wa ter, in heavy ra in, afte r ove rnig ht con ­
densat ion or after washing your car, the braking
effect can be reduced by moisture or ice on the
brake rotors and brake pads. The brakes must be
"dried" first w ith a few careful brake applica­
tions.
At highe r speeds and with the windshie ld wipers
turned on, the brake pads press against the brake rotors for a short amount of time . Th is action,
which is not felt by the driver, happens at regular
intervals and ensures a better reaction time for
the brakes in wet weather .
The braking eff ect can also be reduced if you are
driving on salted roads and you do not apply the
brakes for long periods of time. The layer of salt
on the brake rotors and pads must be worn off
first when the brakes are applied .
Corrosion
Leaving the vehicle parked for long periods of
time, low mi leage and avoiding heavy braking
can contribute to corrosion on the brake rotors
and to dirty brake pads .
If you usually avoid heavy braking or if there is
corros ion present, occasional heavy braking at
h igh speeds is recommended to clean the brake
rotors and pads
¢ ,& .
Brake system malfunct ion
if you notice that the brake pedal travel has sud­
denly increased, then a brake c ircuit in the dual­
circu it brake system may have malfunct ioned.
Drive to an authorized Aud i dea ler or aut horized
Aud i Serv ice Facility immediately to have t he
p roblem co rrected . On the way there, drive with
reduced speed and keep in mi nd that you w ill
need a longer d istance to s top and you w ill need
to p ress the brake pedal har der.
90
Low brake fluid level
When the brake fluid level is low, m alfunc tions in
the b rake system may occur . The brake fluid leve l
i s e lectronically monitored .
Brake booster
The brake booster ampl ifies the press ure you ap­
ply to the brake pedal.
_&. WARNING
- New brake pads do no t achieve the ir full
braking effect during the first 2 50 m i
-
(400 km). They m ust be "b roken in" first .
However, you can compensate fo r the
slightly reduced braking force by pressing
firm ly on the brake pedal. Avoid heavy brak­
ing during the break-in period .
- On ly app ly the bra kes for the purpose of
cleaning the brake system when road and
traffic conditions permit. You must not en­ danger other road users . This increases the
ris k of an accident.
- On steep slopes, reduce the speed and se­
lect a lower gear o r lower selector leve r po·
si tion. D rive as little as possible while press­
ing the bra ke pedal and avoi d pu tting your
left foot on the brake pedal while dr iv ing.
This could cause the bra kes to overhea t and
impair the efficiency of the b rakes.
- Do not let the bra kes "grind" by always
keep ing your foot on the bra ke pe dal. This
can cause the brakes to overheat, inc rease
wear and increase braking distance unneces­
sarily .
- Ce rtain weather and operating conditions
such as d riving through water, dr iv ing in
heavy rain or driv ing after wash ing your ve­
hicle can impai r the effective ness of the
brakes . In t he win ter, ice may build up o n
the bra ke pa ds, rotors and dr ums. Check
t hese components by b raking carefully. Ap ­
plyi ng the brakes carefully seve ral times
dries the brakes and removes ice build-up .
- The efficiency o f th e brakes can also be im­
p air ed by dr iv ing for long s tretches on roads
covered with sa lt wi thout using the bra kes .
You can remove salt deposits from the ..,.