light AUDI TT ROADSTER 2017 Service Manual

Driving
-When acce lerating using the launch control
program, all vehicle parts are subject to
heavy loads . Th is can lead to increased
wear.
Emergency mode
In the event of a system malfunction, there is on
emergency program.
If all of the se lecto r lever posit ions are h ighlight­
ed wit h a light background in the Infotainment
d isp lay, there is a system malfunction and the S
tron ic transmiss ion is running in the emergency
program . The vehicle can still be driven in emer­
gency mode, but only with reduced speed and not in a ll gears . In some cases, the vehicle
can­
not drive in rever se.
(D Note
If the transmission runs in emergency mode,
drive to an aut ho rized Aud i deale r or a uthor­
ized Aud i Service Fac ility immediately to have
the malfunction corrected.
Transmission malfunction
• Tran smis sion: malfun ction! Please stop ve­
hicle and shift to P
There is a malfunc tion in the transmiss ion. Pa rk
the vehicle se curely and do not continue driving.
See an autho rized Au di dea ler o r autho rized Aud i
Serv ice Facility for assistance .
• Transmission: too hot . Please stop vehicle
The transm ission is too hot and can become dam­
aged . Stop and let the transm ission cool with the
engine run ning (at id le) in t he P selector leve r po­
sition. Then the indicato r ligh t an d the message
tur n off, drive to an a uthorized Aud i dea le r or au­
t hor ized Audi Se rvice Facility immed iate ly to have
the ma lfunction co rrected . If the ind icator light
and the driver message do not turn off, do not
continue dr iv ing. See an authorized A udi d ealer
or author ized Audi Se rvice Facility for assistance .
[O] Transmission: malfunction! You can contin­
ue driv ing. See owner' s manual
70
Drive to an au thori zed A udi dealer or authori zed
Audi Se rvice Facility immediate ly to have the
malfunction cor rected.
[O] Tran smission: malfunction! You may contin­
ue dr iving. No reverse gear
Drive to an authorized A udi dealer or au thorized
Audi Se rvice Fa cility immed iate ly to have the
malfunc tion cor rec ted .
ml Tran smiss ion: malfunction! You may contin­
ue driving in D until engine off
Drive the vehicle away from mov ing traff ic and
park . See an author ized Audi dealer or author ized
Audi Se rvice Facility for assis tance.
ml Transmission: too hot . Please adapt driving
style
Continu e driving moderate ly. When the indicator
li ght turns off, you can cont inue driving norma l­
l y.
ml Tran smission: Plea se press brake pedal and
select gear again
I f the transm iss ion m alfu nct io ns bec ause the
temperat ure is too high, a message appe ars
when the t ransmission is cooled .

Ass is t
Assist
Electronic speed Limiter
Your v ehicle may be factory equipped with tires
that are rated for a maximum speed of 130 mph (210 km/h). This is less than the maximum sp eed
of your vehicle . To reduce the risk of sudden tire
failure and loss of control if the vehicle is operat­ ed at excessive speeds, your vehicle also has an
electronic speed limiter . The electronic speed
lim iter prevents your vehicle from going faster
than the t ire speed rating. For mo re information
~ page 253.
If the engine control unit receives faulty vehicle
road speed s ignals , the Malfunction Indicator
L amp (MIL)
¢..ffi will illumina te . If this occurs,
con tact the nearest au thorized A ud i dealer for
assistance.
_& WARNING
Always observe the posted speed limits and
adjust you r speed to suit prevailing road, traf­
fic and weather conditions. Never drive your
vehicle faster than the maximum speed rating
of the tires installed .
Speed warning system
Applies to: vehicles with speed warning system
The speed warning system helps you to stay be­
low a specified maximum speed that can be set,
changed or deleted in the Infotainment system . -
The speed warning system warns you if you are
exceeding the maximum speed that you have set
.
A warni ng tone will sound as soon as you r speed
exceeds the sto red value s lightly . The
(OJ (USA
models)
I [OJ (Canada models) indicator light
and a message appear i n the ins trumen t cluster
d isp lay a t the same time. Th@
Hll (USA models)/
[O](Canada models) i ndicator light and the mes­
sage turn off when the vehicle speed drops be low
the stored maximum speed.
Se tting a threshold is rec om mended if you would
like to be reminded when yo u reach a certa in
maximum speed . Situations where you may want
to do so include driving in a country w it h a ge ne r-
72
al speed limit or if there is a spec ified maximum
speed for winter tires.
Setting the warning threshold
.,. Select in the Infotainment system: IM ENU ! but­
t on
> Vehicle > left con trol b utton > Driver as ­
sistance > Speed warning > Manu al.
a) Tips
Regar dless of the speed warning sys tem, you
sh ould alw ays mon itor your spee d using the
speedometer and tnake s ure yo u are fo llow ing
the lega l speed limit.
Cruise control system
Switching on
Applies to: vehicles with cruise control system
The cruise control sys tem makes it possible to
drive at a constant speed starting at 15 mph (20kmlh) .
0
f
~
0
Fig. 7 7 Operat ing lever: c ruise co ntro l sy ste m
.,. To switch on the system, pu ll the lever in to po -
sition @~
fig. 77 .
.,. Drive at th e speed to be maintained.
.,. To store the speed, press the button @.
The stored speed and the
M;\1)~1j (USA models) /
l'I (Canada models) indicator light are disp layed
in the instrument cluster.
The speed is maintained by modifying engine power or through a n active brake intervention.
_& WARNING
- Always pay attention to the traffic around
you when the cruise contro l system is in op­
erat ion. You are always respons ible for your ,...

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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

Ass is t
& WARNING
You should only resume the stored speed if it
is not too high for existing traffic conditions.
Otherwise you can increase the r isk of an acci­
dent .
Audi active Lane assist
Description
Appl ie s to: ve hicles w ith Audi ac tive lane assis t
Active lane assist detects lane marker lines with­
in the limits of the system using a camera in the
windshield. If you are approaching a detected
lane marker line and it appears likely that you
will leave the lane, the system will warn you with
correct ive steering. You can override th is steer ing
at any time . If you pass over a line, the steer ing
wheel will v ibrate l ightly. In order for this warn­
ing vibration to occur, it must first be sw itched
on in the Infotainment system. Active lane assist
is ready for operation when the lane marker line
is detected on at least one side of the vehicle.
The system is designed for driving on express ­
ways and highways and so it only activates at
speeds above approximately 40 mph (65 km/h) (depending on the market).
Applies to vehicles w ith side assist* : if you act i­
vate a turn signal when active lane assist is ready
and it classifies a lane change as critical because
of vehicles traveling alongside you or approach­
ing you, there w ill be noticeable corrective steer­
ing shortly before you leave the lane. This will at­
tempt to keep your vehicle in the lane.
Applies to vehicles without side assist* : the sys­
tem does not warn when it is ready if you activate
the turn signal before crossing the lane marker line . In this case, it assumes that you are chang­
ing lanes intentionally .
& WARNING
-The system wa rns the driver that the veh icle
is leav ing the lane using co rrective s teer ing.
1 ) The co rrect ive stee ring fun ctio n is not ava ilabl e in all mar ­
ket s.
74
The driver is always responsible for keeping
the vehicle within the lane.
- The system can assist the driver in keeping
the vehicle in the lane, but it does not drive
by itself. A lways keep your hands on the
steer ing wheel.
- Corrective steering may not occur in certain situations, such as during heavy braking.
- There may be cases where the camera does
not recognize all lane marker lines. Correc­
tive steering can only take place on the s ide
of the vehicle where lane marker lines are
detected .
- Other road structures or objects could poss i­
bly be identified un intent ionally as lane
marker lines . As a result, corrective steering
may be unexpected o r may not occ ur.
- The camera view can be restricted, for ex­
ample by vehicles driving ahead or by ra in,
snow, heavy spray light shin ing into the
camera or by dirt o n the window. This can
result in active lane assist not detecting the
lane marker lines or detecting them incor ­
rectly.
- In certain s ituations where visibility is low,
the vehicle may switch internally from "ear­
ly" to "late" steering cor rection
ll.
- Unde r certain cond itions such as r uts in the
road, an inclined roadway or crosswinds, the
corrective steer ing alone may not be enough
to keep the vehicle in the m iddle of the lane.
- For safety reasons, active lane assist must
not be used when there are poor road and/
or weather conditions such as slippery
roads, fog, gravel, heavy rain, snow and the potential for hydroplaning . Using active lane
assist under these cond it ions may increase
the risk of a crash.

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Switching on/off
A ppl ies to: ve hicles with Audi active lane assist
Fig. 78 T urn s ignal lever: button for active lane assist
F ig. 79 Windsh ield: camera w indow for active lane assist
... Press the c:> fig. 78 button to switch the system
on and off . The . or. indicator light in the
inst rument cluster turns on or off .
Indicator lights
• Ready:
the indicator light turns on when the
system is ready for use. The system can now be
operated .
• Not ready: the indicator light turns on if the
system is switched on but is inoperab le. Th is may
be due to the following reasons:
- There is no lane marker line.
- T he relevant lane marker lines are not detected
(for example, markings in a construction zone
or because they are obstructed by snow, dirt,
water or lighting).
- The vehicle speed is below the activation speed
of approximately 40 mph (65 km/h) (the speed
may vary depending on your country).
- The lane is too narrow or too wide.
- T he curve is too narrow.
- The driver's hands are not on the steering
wheel.
Assist
(D Tips
- Make sure the camera 's field of view
¢ fig. 79 is not obstructed by st ickers or
anything else. For information on cleaning,
see
c:> page 266.
- In certain markets: if the system is switched
on, it wi ll switch on automatically each time
the ignition is switched on.
Indicator in Infotainment di splay
App lies to : vehicles wit h Audi active la ne ass ist
Fi g. 80 Inst rume nt cluster: active la n e ass ist is switc hed
on and providing warnings
You can call up the active lane assist disp lay us­
in g the butt ons in the multifunction steering
wheel
c> page 19 .
Green li ne(s) Act ive lane assist is activated
and ready to provide warn ings.
Red line(s) Active lan e assist warns you
(left or right) before leav ing a lane
c:> fig. 80.
In addition, the steering wheel
vibrates lightly.
Gray line(s) Active lane assist is act ivated,
but is not ready to give warn-
ing
Messages in Infotainment display
If the active lane assist sw itches off automatical­
ly, the indicato r ligh t in the display turns off and
one of the following messages appears :
Audi active lane assist: currently unavailable.
Camera view restricted. See owner's manual
This message appears if the camera is unable to
detect the lines . This could happen if: ..,
75

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Switching on and off
Applies to: vehicles with Audi side assist
The system ca n be switched on/off in the Info­
t a in men t system.
"' Select in the Info tainment sys tem:
iM ENUI but­
ton
> Vehicle > left contro l butto n >Driver as­
sistan ce > Audi side assist
If the system is activated, the displays in the ex ­
ter io r mir rors wi ll turn o n briefly when the ig ni­
tion is sw itched on.
Adjusting the display brightness
Applies to: vehicles with Audi side assist
The display brightness can be adjusted in the In­
fotainm ent system.
"' Se lect in the Infotainment system: i MENU I but­
ton
> Vehicle > left contro l butto n >Driver as­
sistance > Audi side assist
The display b rightness ad justs automat ica lly to
the br ightness of the s urrou ndings, both in the
in fo rmat ion and in the warning stage . In very
da rk or ve ry br igh t sur ro u ndings, the a utomat ic
ad ju st men t will se t th e d isp lay to the mini mum
or maxim um level. In s uch cases , you m ay no tice
no change w hen adjus ting t he br ightness, o r th e
change may on ly be no tic eable o nce the su r­
ro undings change .
A dju st the br ightn ess to a level where the d isp lay
i n the inform ation stage wi ll no t di srupt your
v iew ahead. If you change the brightness, the dis ­
p lay in the exter ior mir ror will briefly show the
b rightness level i n the information stage . The
b rightness of the warning stage is linked to the
b rightness in t he info rmat ion stage and is ad just­
ed along w ith the information stage .
- Side assist is not active wh ile you are ma k­
i ng the ad justment.
- Your settings are automatically stored and ass igned to the remote cont rol key being
used.
Assist
Messages
Applies to: vehicles with Audi side assist
I f the s ide ass is t swi tches off automat ically, a
mess age app ear s in t he In fota in men t sys tem dis ­
play.
@j Audi side assist: currently unavailable.
Sensor vision restricted due to surroundings.
See owner 's manual
The radar sensors ' v is ion is affected. Do not cover
the a rea in front of the sensors with bike whee ls,
stickers, dirt or other objects. Clean the area in
front of the sensors, if necessary
q page 77,
fig. 84.
@j Audi side a ssist: currently unavailable.
See owner's manual
S ide assist cannot be switched on at this time be­
ca use there is a ma lfu nction ( for example, the
battery c harge leve l may be too low) .
@j Audi side assist: malfunction! Please
contact Service
The system cannot guarantee that it will detect
vehicles cor rect ly and it has switc hed off. The
senso rs have been move d or are fa ulty. Have the
syste m chec ked by an au tho riz ed Au di deale r or
a uthor iz e d Au di S ervice Faci lity s oon.
Audi drive select (drive
settings)
Introduction
Applies to: vehicles with Audi drive select
Dr ive select ma kes it possib le to e xper ience dif­
fere nt types of ve hicl e sett ings in one ve hicle.
T he driver can sele ct from th ree mo des,
Comfort ,
Auto
and Dynamic , using the r.~;\,1 bu tton in the
center console o r by using the Infotainment sys­
tem. This allows you to switch between a sporty
and a comfo rtable driv ing mode, fo r example. In
t h e
Individual mode, the sett ings can be ad just­
ed to yo ur persona l pre ferences . This makes it
poss ible to com bine settings such as a sporty en-
gine sett ing wi th light s teer ing. .,._
79

Parking systems
Parking systems
General information
A ppl ies to: ve hicles w ith rear pa rk in g sys te m /p ark in g system
p lus
Depending on your vehicle's equipment , various
parking aids will help you when parking and ma­
neuvering.
The
rear park ing system is an audible parking aid
that warns you of obstacles
behind the vehicle
c:> poge 83.
The parking system plus assists you when park ­
ing by audibly and visually indicating objects de­
tected
in front of and behind the veh icle
c:> poge83.
The rearview camera shows the area behind the
vehicle in the Infotainment system display . The
lines in the rearview camera image help you to
park or maneuver
c:> page 84. The parking sys­
tem plus functions are also available
c:> page83.
& WARNING
-Always look for traffic and check the area
around your vehicle by looking at it directly
as well. The parking system cannot replace
the driver's attention. The driver is always
responsible when entering or leaving a park­
ing space and during similar maneuvers .
- Please note that some surfaces , such as
clothing, are not detected by the system .
- Sensors and cameras have blind spots in
which people and objects cannot be detect­
ed . Be especially cautious of small children
and animals .
- The sensors can be displaced by impacts or
damage to the radiator gr ille, bumper,
wheel housing and the underbody . The park­
ing system may be impaired as a result.
Have an authorized Audi dealer or author­
ized Audi Service Facility check their func­
tion .
- Make sure the sensors are not obstructed by
stickers, deposits or other materials. If they
are, the sensor function could be impaired.
For additional information on cleaning, see
c:> page266.
82
(D Note
-Some objects are not detected or displayed
by the system under certain circumstances:
- Objects such as barrier chains, trailer draw
bars, vertical poles or fences
- Objects above the sensors such as wall ex ­
tensions
- Objects with certain surfaces or structures
such as chain link fences or powder snow
- If you continue driving closer to a low ob­
ject, it may disappear from the sensor range. Note that you will no longer be
warned about th is obstacle.
- Keep enough distance from the curb to re­
duce the risk of damage to the rims .
@ Tips
-The system may provide a warning even
though there are no obstacles in the cover­
age area in some situations, such as :
- certain road surfaces or when there is tall
grass.
- external ultrasonic sources such as from
cleaning vehicles .
- in heavy rain, snow, or thick vehicle ex­
haust.
- We recommend that you practice parking in
a traffic -free location or parking lot to be­
come familiar with the system . When doing
this, there should be good light and weath­
er conditions.
- You can change the volume of the signals.
- What appears in the display is slightly de-
layed.
- The sensors must be kept clean and free of
snow and ice for park aid to operate .

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 ..,.