brake AUDI A3 SEDAN 2017 Service Manual

Assistance systems
Driving in stop-and-go traffic
Applies to: vehicles with Audi adaptive cruise contro l
Fig. 135 In str um ent cluster : sa fe sta rt mo nitor
The adaptive cruise control system assists you in
stop -and -go traffic . If a vehicle that is detected
ahead stops, your vehicle will brake and stay at a
stop , within the limits of the system.
.,. To resume driving with adaptive cruise control,
tap the accelerator pedal or
... Pull the lever toward you into position @
9 page 130, fig. 136.
Starting to drive with adaptive cruise
control
1 )
As lo ng as the message ACC: automatic go is dis­
p layed and the object detected ahead starts to
move, your veh icle will continue driving
9 ,1.. You
can activate
ACC: automatic go again for a short
time by pulling the lever to position @.
The
ACC : automatic go sta rt mode ends when
the brake pedal is pressed.
For safety reasons, your vehicle will only start to
drive automatical ly if
- the driver's safety belt is fastened ,
- all doors and the hood are closed ,
-your vehicle is not stationary for more than
three minutes.
Safe start monitor
If an obstacle is detected when you sta rt driving,
you will be alerted to the danger by
the. indi­
cator light and the image in the instrument clus­
ter disp lay
9 fig. 135 9 &. . An audio signal will
also sound . Your vehicle will drive more s low ly
l) Thi s is not a vailable in som e coun trie s.
130
when starting . This may also happen in some sit ­
uations when there is no apparent obstacle.
- Press the brake pedal to slow yo ur vehicle
down.
&_ WARNING
If the message ACC : automatic go 1
l appears,
your vehicle w ill start driving even if there is
an obstacle between your vehicle and the ve­
hicle driving ahead. This increases the risk of
an accident.
(D Tips
If adaptive cruise control is active and your
vehicle does not start driving even though the
message
AACC: automatic go1l appears, you
can start driving by tapp ing the accelerator
pedal.
Interrupting cruise control
Applies to: vehicles with Audi adaptive cruise control
Fig. 136 Operating leve r
Requirement: adaptive cruise control must be
switched on.
Overriding cruise control
... To accelerate manua lly, pull the lever toward
you into posit ion @ and hold it there, or press
the accelerator pedal. The message
ACC: over­
ride
appears.
.,. To resume cruise control, release the lever or
take your foot off the accelerator pedal.
.,.

a, a, ..... N
" N ..... 0 N > 00
Inte rr upting crui se control while driving
• Move the lever into posit ion @. The message
AC C: standb y appears. Or
• press the brake pedal.
• To resume the stored speed, move the lever in­
to position
@ .
In te rrupting crui se contr ol when stopped
• Push the lever away from you into position @.
The message
A CC: sta ndb y appears.
• To resume cruise control, press the brake pedal
and pull the lever toward you into position @.
A WARNING
It is dangerous to activate cruise control and
resume the stored speed when the current
road, traffic or weather conditions do not per­
m it this . This inc reases the risk of an acc ident.
Setting the distance
Applies to: vehicles with Audi adaptive cruise contro l
,
0
Fig. 137 Operat ing lever : setting the d istance
• Tap the switch to display the current set dis­
tance
¢fig. 137 .
• To increase or reduce the distance in incre­
ments, tap the switch upward/downward
again. The d istance between the two vehicles
wi ll change in the instr ument cluster d isp lay.
When approach ing a vehicle driving ahead, the
adapt ive cruise control system brakes to match
that vehicle's speed and then adjusts to the set
d istance.
If the vehicle dr iv ing ahead ac celerates,
then the adaptive cruise control wi ll also acceler­
ate up to the speed that you have set.
The higher the speed, the greate r the d ista nce
¢ &, .T he Di stan ce 3 setting is recommended.
A ss is ta nce syst ems
That is equal to the general recommendation of
"ha lf the speed shown on the speedometer".
T he distances provided a re specified values. De­
pend ing on the driv ing s ituation and how the ve­
hicle ahead is d riving, the actua l distance may be
more or less than these target distances.
If you change the time gaps, the newly set value
appea rs briefly in the instrument cl uster d isplay,
f or example
II for Di stan ce 3 . This only occurs if
the adaptive cruise contro l is not current ly shown
i n the display ¢
page 128, fig. 133.
Dista nce 1 : this setting corresponds to a distance
of 92 feet (28 meters) when traveling at 62 mph
(100 km/h), or a time distance of 1 second.
Di stance 2 : this setting corresponds to a dist ance
of 118 feet (36 mete rs) when traveling at 62
mph (100 km/h), or a time distance of 1.3 sec ­
onds .
Distance 3: this setting corresponds to a distance
of 164 feet (SO mete rs) when traveling at 62
mph (100 km/h), or a time distance of 1.8 sec ­
onds .
Distance 4 : this setting corresponds to a dist ance
of 219 feet (67 mete rs) when traveling at 62
mph (100 km/h), or a time distance of 2.4 sec ­
onds .
Distance 5 : this setting corresponds to a distance
of 328 feet (100 meters) when traveling at 62
mph (100 km/h), or a time distance of 3.6 sec ­
onds .
A WARNING
-
When setting the distance, the driver is re -
sponsible for adhering to any applicable legal
regulations.
(D Tips
Your settings are automatically stored and as­
signed to the remote control key being used.
131

CXl CXl .... N ,.__
N .... 0 N > 00
fall below t he warn ing t hreshold for an ex ­
tende d pe riod of time .
Messages
Applies to: veh icles with Audi adaptive cruise control
ll'J ACC: unavailable
The system ca nnot guaran tee that it will detec t
ve hicl es co rrectly a nd it h as sw it c he d off . T he
sensor was moved or is fau lty . Dr ive to an au tho r­
i z ed A udi dealer or au thori zed A udi Service Fac ili­
ty immediately to have the malfunction cor rect ­
ed .
Ill ACC : currently unavailable . No sensor vision
II ACC: currently unavailable. Sensor vision re­
stricted due to surroundings . See owner's man­
ual
This message appears if the sensor view is ob ­
structed, for example by leaves, snow, heavy
sp ray o r d i rt. C lean the sensor
r:::;, page 12 7,
fig. 12 9.
II ACC : currently unavailable . Gradi ent too
steep
The road exceeds the maximum possib le ang le
for safe adaptive cruise control operation . The
adapt ive cr uise control cannot be sw itched on .
II ACC: only available in D, Sor M
Select the D/S or M se lector lever posi tion.
Ill ACC : parking brake applied
The adaptive cruise co ntro l system switches off
automatically if the parking brake is set. T he
adapt ive cr uise control is ava ilable aga in a fter re­
l easi ng the par king brake .
ll'J ACC: currently unavailable. Stabilization
c ontrol input
T his message appea rs if the Electronic Stabiliza ­
tion Control (ESC) is tak ing action to stabili ze the
ve hicle. In this case, adapt ive cruise control
sw itches off automatically.
II) ACC off: manual control!
This message appea rs if the veh icle rolls back
when sta rting on a slight in cline , even though
Assistance systems
ACC is ac tive . Press t he b rake pedal to preven t
t h e vehi cle from rolling o r starting to move.
Distance warning: malfunction! Please contact
Service
T he system canno t gua rantee that it will detect
vehicles cor rect ly and it has switc hed off. The ra ­
dar sensor was move d or is faulty. Drive to an a u­
thorized Aud i de aler o r au thori zed Audi Service
F acility immed iate ly to have the ma lfunction co r­
rected.
Distance warning: currently unavailable. Sensor
view restricted due to surroundings.
T h is message appears if the senso r view is ob­
str ucted, for examp le by leaves, snow, heavy
s pra y or dirt. Cle an t he
sensor <> page 12 7,
fig. 129 .
Distance warning: currently unavailable. See
owner's manual
This message appears if the system has a tempo­ rary fa ilure.
If this occurs m ultiple t imes, drive to
an a uth orized Aud i dea le r or a uth orized Audi
Se rvice Facility i mmed ia te ly to h ave the ma lfu nc­
t ion co rre cte d.
Fasten seat belt
The system is not complete ly ava ilable if the dr iv­
er 's seat belt is unfastened.
Stat. obj. ahead
T h is m ess age appears if yo u wo uld like to switch
t h e sys tem on and t here is a s ta ti onary objec t di­
rectly in front o f yo ur vehicle.
Door open
The system is not available whe n the vehicle is
stationary and the driver's door is open.
Audi pre sense
Introduction
Appl ies to : vehicles wit h Aud i pre sense
Within t he limits of the system, the pre sense
f unct ions can initiate measures in pa rtic ularly
dange rous situations to protect the vehicle pas-
sengers and other road users.
..,.
133

Assistance systems
-Due to the interlinking of various vehicle sys­
tems, critica l driving situations can be detected
by
pre sense basic and measures for preventa­
tive occupant protection are can be initiated.
-The pre sense front uses the data from the ra­
dar sensors and calcu lates the probability of an
accident
c> page 127. An impending collision
with vehicles can be detected within the limits
of the system . In this case, the system warns
the driver visually, acoustically and with a jerk
on the brakes if necessary. If needed, it can i ni­
tiate a partia l or full dece le rat ion to reduce the
collision speed o r to avoid the coll ision unde r
ce rtain c ircumstances. In conjunction with pre
sense basic, the front safety belts are also re­
versib ly tensioned when needed . The pre sense
front is also active when adaptive cruise con­
trol* is sw itched off.
.,&. WARNING
Also follow the general instructions found in
c> .&. in General information on page 127.
(i) Tips
-Certain pre sense functions switch off when
driving in reverse.
-The pre sense functions may not be availa­ ble if there is a malfunction in the ESC sys­
tem or the airbag contro l module.
-Note that the reversible belt tensioner on
the front passenger's side deactivates when
the front passenger's a irbag is deactivated .
-Switch the pre sense off when you are not
us ing public streets or when loading the ve­
hicle onto a vehicle carr ier, train, ship or
other type of transportation. This can pre­
vent an undes ired intervention from the pre
sense system.
Audi pre sense basic
Description
Applies to: veh icles with Audi pre sense basic
The pre sense basic funct ions are activated at a
speed of approximately 20 mph (30 km/h) or h igher.
134 The following
functions can be triggered under
certain conditions within the limits of the sys ­
tem:
-Tensioning of the safety bel ts (for examp le,
during heavy braking): the front safety belts
have reversib le be lt tensioners. If a collision
does not occur, the safety belts loosen slightly
and are ready to trigger aga in.
-Initiating the closing of the windows and the
panorama glass roof* (for examp le when un­
der- or oversteering).
Audi drive select* : the trigger times are adjusted
depending on the mode selected.
Audi pre sense front
· Description
Applies to: vehicles with Audi pre sense front
Within the limits of the system and depending
on the situation and speed, pre sense front can
warn you about impending collisions with sta­
tionary, stopped, and moving vehicles and ini ­
tiate appropriate braking measures.
If detection is not possib le, then pre sense front
does not react.
The following func tions trigger in conjunction
with pre sense basic at corresponding vehicle
speeds :
-Reversible tens ion ing of the front safety belts.
-Closing the windows and panorama glass roof*.
Warnings and braking
Applies to: vehicles with Audi pre sense front
Fig. 140 Instrument cluster: approach warning
0
;
::c

CXl CXl .... N r--­N .... 0 N > 00
Ea rl y warning /a cut e warning
The system can prov ide v is u al and aud ible warn­
ings when dangerous situations are detected.
The
earl y wa rning may occur if:
- a vehicle d riving ahead brakes strongly,
- your vehicle is traveling at speeds between ap-
prox imately 20 to 50 mph (30 to 85 km/h) and
it approaches a stationary veh icle.
- your vehicle is trave ling at speeds between ap­
prox imately 20 to 155 mph (30 to 250 km/h)
and it approaches a vehicle that is clearly t rav­
eling more slowly o r a veh icle in your direction
of travel that is stopped.
When t his warning occurs, it may on ly be poss i­
b le to avoid a collision by swerv ing or b raking
strong ly. The message
Aud i pre sens e.
¢ fig . 140 and a warning tone will warn you
about the danger .
If there is an impending collision with vehicles,
there will a lso be an
acute warning in the form of
sharp braking. If you do not react to the acute
warn ing, pre sense front can brake with increas ­
ing force within the limits of the system. This re­
duces the vehicle speed in the event of a coll i­
sion.
Automatic d ecel erati on
Depending on the speed , pre sense front can de­
c elerate automat ically
shortly before a collision:
- i f there are s tat ionary vehicles whe n you are
traveling at speeds up to approximately 28 mph (45 km/h).
- if there are vehicles driving or stopped ahead
when you are traveling at speeds up to approxi ­
mately 155 mph (250 km/h) .
Automatic braking force inc rease
I f pre sense front determines that you are no t
b raking st rongly enough when a collision is imm i­
nent, it can increase the b raking force, depending
on the situation and speed.
- i f there are stationary vehicles whe n you are
t raveling at speeds up to approximately 50
mph (85 km/h) .
A ss ista nce sys te m s
- if there are vehicles d riving or stopped ahead
when you are traveling at speeds up to approxi­ mate ly 155 mph (250 km/h).
A WARNING "--
Pre sense front cannot overcome the laws of
physics. It is a system designed to ass ist and
i t cannot prevent a collision in every c ircum­
stance. The driver must always intervene. The
d river is always respons ible for braking at the
cor rect time. Do not let the increased safety
p rovided tempt you into ta king risks. This
could increase your risk of a collis ion .
- Keep in mind th at pre sense front can pro ­
vide warn ings or b rake unexpected ly. Al­
ways secure any cargo or objects that yo u
are transporting to reduce the risk of dam­
age or injury.
- The system can dep loy incorrectly due to
system-specific limits.
- Please note that the sensor does not a lways
detect a ll objects . T hi s increases the risk of
a co llision.
- Pre sense front does not react to vehicles traveling toward you in the same lane, to peop le, groups of people, anima ls, objects
that are crossing the road, or objects that are difficult to
detect¢ &. in General infor­
mation on page 12
7.
A WARNING
"---
Pre sense front may be restricted or not avail­
able i n the follow ing example s ituations:
- if there a re other ref lective objects nearby,
such as guard ra ils or vehicles.
- when dr iv ing into a tunnel.
- in heavy fog, ra in, spray or snow.
- if the radar sensor is di rty, covered in ice,
damaged, or covered .
- in curves .
- if the ESC was restri cted or sw itched off.
(£) Note
The sensor can be displaced by impacts or
damage to the bumper, wheel housing and u nderbody. Pre sense front ca n be impaired
135

Ass is tance sy stems
Rear cross-traffic assist
Applies to: ve hicles w ith rear cross -traff ic ass ist
F ig. 148 D isp lay example
F ig. 149 Infotainment system: rear cross-traffic assist dis­
play
The rear cross-traffic assist can warn the driver of
a potential collis ion with approaching cross-traf­
fic when driving in reverse. Within its limits, the
system mon itors the areas beh ind and next to
the vehicle using the radar sensors when leaving
a park ing spa cer::!.>
page 140, fig. 147. Moving ob­
jects that are approaching, such as cars, are de­
tected
r::!.>fig. 148.
If the system detects cr itical c ross traffic when
backing ou t of a par king space, it will rea ct as fol­
lows:
- Vi sual indicator : an indicator appea rs in the In­
fota inment system display wi th a red arrow
symbol. The ar row po ints in the direction from
which the object is approach ing
r::!.> fig . 149.
- Audible warning signal : a continuous tone may
sound as an addition al indicator when driving in
reve rse.
- Automatic brak e activation : a brief act ivat io n
of the brakes may a lso warn you of a potential
collision with an approaching object.
142
Requir ements for using the r ear cross -traffic
as sist :
-The parking aid m ust be switched on
c>page 146.
-Reverse gear must be engaged.
- The speed must not be higher than approxi -
mate ly 7 mph (12 km/h) .
A WARNING
-The rear cross-t raffic assist is an assist sys­
tem and cannot prevent a collision by itself.
The driver must always intervene. The driver is always responsib le for braking at the cor­
rect t ime.
- Please note that the rear cross-traff ic assist
may activate the brakes unexpected ly. Se­
cure any cargo that you are transpo rting to
reduce the r isk of damage or injury.
- An add itiona l brake activation may be trig­
ge red w ithi n
10 seconds after an automatic
brake activation.
- If there is an acoust ic warning signal from
the rea r cross-traffic assist, t hen the park­
ing sys tem may not warn you of detected
obs ta cl es u nde r certain circumstances.
- The v iew of the radar sensors may be im­
pa ired by leaves, sn ow, heavy sp ray or dirt.
Clea n the area in fron t of t he sensors
r::!.> page 140, fig . 147.
A WARNING
T he rear cross- traffic assist is subject to limi­
tations and cannot warn yo u before every im­
pending co llision:
- If the veh icle is too wide for the park ing
space and covered by the neighboring
veh icles.
- People, such as cyclists, joggers, in line skat ­
ers a nd pedest rians, may not be detected
under certain circumstances.
- If you are in a paralle l parking s pace or d iag­
onal park ing space .
(D Note
Also read the information in r::!.> 0 in General
information on page 1 41.

@ Tips
-You can cance l the automatic brake activa­
tion w ith increasing bra king fo rce if you ap­
ply the brakes y ourse lf or accelerate cons id­
erab ly.
- In some sit uations, rea r cross-traffic assist
may warn yo u even if there is no cross traffic
i n a cr itical a rea , for examp le w hen back ing
i nto a parki ng space or ma neuver ing.
- The rea r cross-traffic ass ist also switches off
whe n you switch off the ESC.
- The rea r cross traffic assist switches on and
off thro ugh the pa rking aid
qpage 146.
- The system is not available when towin g a
trailer.
Messages
A ppl ies to: ve hicles with Audi side assist
If t he side assist switches off automatically, a
message appea rs in the ins trumen t clus ter dis ­
pl ay.
@j Aud i side assist: System fault!
The system can not guarantee that it wi ll detect
ve hicles co rrectly and it has switched off. The
sensors have been moved o r are faulty. Have t he
system checked by an authorized Audi dea ler or
author ized Audi Service Facility soon .
@j Audi side assist: currently unavailable. No
sensor vision
@j Audi side assist: currently unavailable. Sen­
sor vision restricted due to surroundings . See
owner 's manual
The radar senso r vis io n i s im paire d. Do not cove r
the area i n front of t he senso rs with bike wheels,
stickers, dirt o r othe r objects. C lean the area in
fron t of t he senso rs, if necessary
q page 140,
fig. 147.
@j Audi side assist: currently unavailable
S ide assis t cann ot be swi tched o n at thi s time be­
c a use t here is a mal func tion (fo r ex amp le, the
~ ba ttery ch arge level may be too low) .
....
~ @j Audi side assist: unavailable in towing mode
....
~ @j Audi side assist: unavailable in towing mode
00
Assistance systems
Sid e ass ist swi tches off automatically a fter a
s h ort time when a factory -insta lled tra ile r h itch
i s connected to the e lectrica l connecto r on the
t railer . T here is no gua rantee the system will
switch off when using a retrofitted trailer h itch.
Do not use side assist when tow ing a trailer .
Ill Rear parking aid : obstacle detection restrict­
ed
T he rea r cross -tra ffic ass is t is not available. Ei­
t h er th e ESC is sw itched off, or the rada r senso rs
may be cove red by a bike rack, st icke rs, leaves,
snow o r other objects. Switch the ESC on, or
clean the area in front of the senso rs if necessa ry
q page 140, fig . 147. If t his message continues
to be displayed , dr ive immed ia tely to a n author­
iz ed Audi dea ler or author ized Audi S ervic e Facili­
ty to ha ve the m alfunc tion re paire d.
Audi drive select
Introduction
Applies to : vehicles wit h Audi drive se lec t
Audi dr ive select makes it poss ible to experience
diffe rent types of vehicle settings in one vehicle.
T he dr iver can select from three modes,
Comfort ,
Auto
and Dynamic , using t he r:;~, bu tton in the
c en te r c onsole o r by usin g the Info ta in m ent sys­
te m. T hi s a llow s yo u t o swi tch between a sporty
and a com fo rt ab le driv ing mode, fo r ex am ple. In
t h e
Individual* mode , the settin gs ca n be adjus t­
ed to yo ur persona l preferences . T his makes it
p oss ible to com bine settings such as a spo rty en­
gine setting with light steer ing.
Description
App lies to : vehicles wi th Audi drive se lect
The veh icle set up i n eac h mode depends on the
vehicle's features. However, the eng ine a nd
stee ring are always affec ted .
Engine and automatic transmission
Depend ing on the mode, the engine an d auto­
matic transm ission* respond more q uickly o r in a
more ba la nced manner to acce lerato r pedal
movements . In the sporty dynam ic mode, th e
t ransm iss io n shifts at higher spe ed ranges .
..,.
143

Parking system s
-The ignition is switc h off and back on again.
-The park ing brake is set and then re leased.
-T he selector lever must be in the P position .
Segments in the vis u al display
The segments in front of and behind the vehicle
i::> fig . 153 help you to determine the distance be­
tween your vehicle and an obstacle. The red
lines* mark the expected direction of travel ac­
cord ing to the steering angle . A white segment
i n dicates an identified obstacle that is outside of
the vehicle's path. Red segments show identified
obstacles that are in your vehicle's path . As your
veh icle comes closer to the obstacle, the seg­
ments move closer to the veh icle. The collision
area has been reached when the next to last seg­ ment is displayed. Obstacles in the collision area ,
including those outside of the vehicle's path, are
shown in red . Do not continue dr iv ing forward or
i n
reverse ¢.& in General information on
page 146,
¢ Cf) in General information on
page 146!
Rearview camera
Introduction
App lies to: veh icles with rearview camera
Fig. 1 54 Illustra tion: c ross park ing
a, N
~
> 00 (X)
The rearview camera helps you to park or maneu­
ver using the orientation lines .
148
General information
Applies to: vehicles with rearview camera
Fig. 155 Area cove re d (D and area not cove re d @ by t he
r earv iew camera (examp le)
A UD ~
0
Fig . 156 Rea r lid: loca tion of the rearv iew ca mera (exa m­
ple)
The rearview camera is located above the rear li­
cense p late bracket . Make sure that the lens for
the parking system
¢ fig . 156 is not covered by
deposits or any other obstruct ions because this
can affect the function of the parking system. For
i nforma tion on cleaning,
see¢ page 347.
The rearview camera coverage area includes (D
¢ fig . 155 . Only this area is shown in the Info­
ta inme nt display. Objects that are o uts ide of this
area
@ are not disp layed .
WARNING
-Always read and follow the applicab le warn­
ings
¢ &. in General information on
page 146 .
-If the position and the installation angle of
the rearview camera was changed, for ex­
ample after a collision, do not continue to
use the system for safety reasons. Have it
checked by an aut horized Aud i dealer or au-
thorized Audi Service Fac ility .
..,

CXl CXl .... N ,.__
N .... 0 N > 00
Intelligent Technology Electronic Stabilization
Control (ESC)
Description
Electronic Stabilization Control ( ESC) supports
driver safety . It reduces the risk of slipping and
improves dr iving stability. ESC detects critica l sit­
uations such as the vehicle oversteering and un­
dersteer ing or the wheels are spinning. The vehi­
cle is stabilized by apply ing the brakes or reduc ­
ing engine torque . When the ESC engages, the
G1 indicato r light b links in the instrume nt clus­
ter.
The follow ing systems are integrated in the ESC:
Anti-loc k bra king system (ABS)
ABS prevents the whee ls from locking when brak­
ing. The vehicle can still be steered even during
hard brak ing. Apply steady pressure to the brake
pedal. Do not pump the pedal. A pulsing in the
b rake pedal indicates that the system is act ing to
stabilize the vehicle .
Brake a ssist system
The brake assist system can decrease braking dis­
tance. It increases brak ing power when the driver
presses the brake pedal quick ly in emergency sit­
uations . You must press and hold the brake pedal
u nti l the dangerous sit uat io n is ove r. In veh icles
with adaptive cr uise contro l*, the bra ke assist
s ys tem is more sensitive if t he d istance detec ted
to the veh icle dr iv ing ahe ad is too small.
Anti -slip regulation (ASR)
ASR reduces eng ine power when the drive wheels
begin spinning and adapts the force to the road
conditions . This makes i t eas ie r to sta rt, acceler­
ate and dr ive up hill s.
Electronic differential lock (EDL )
The EDL applies the brakes to a wheel that starts
spinning and transfers t he drive power to the
other driving wheel or wheels ( if the veh icle is
eq uipped w ith all whee l dr ive*) . T his function is
n o t available at higher speeds.
Intellig ent Technology
In extreme cases, ED L automat ica lly switches off
to keep the brake o n the braked whee l from over­
heating. The veh icle is still working correct ly. EDL
will switch on again automatically when condi­
t ions have returned to normal.
Ste ering recommendation
The ESC he lps to s tabilize the vehicle by changing
the steering torque.
Select ive wheel torque control
Se lective wheel to rque cont rol is used w hen driv­
i ng on curves. The fron t whee l on the inside of
the curve or bo th wheels on the i nside of the
c u rve are braked se lective ly as needed . This al­
l ows more precise driving in c urves.
Automatic post-collision braking system
T he "automat ic pos t-collision braking system"
c an help to reduce the risk of sliding an d of addi ­
tiona l co llisions a fter an acciden t. If the ai rbag
contro l modu le detects a co llision above a certain
vehicle speed, the veh icle is bra ked by the ESC.
T he vehicle does not bra ke autorn,;1tically if;
- t he dr ive r presses the acce le rator pedal, or
- the ESC, the brake system or the veh icle elect ri-
cal system are not functioning .
A WARNING
-The ESC and its integ rated systems cannot
overcome the lim its imposed by natura l
phys ic al laws. This is especially important
on sli ppery or wet roads . If the sy stems be­
gin acting to stabilize your vehicle, you
should immediately alter your speed to
match the road and traffic conditions. Do
not let the inc reased safety provided tempt
you into taking risks. This could increase
your r isk of a coll is ion.
- Please n ote the r isk of a coll is ion increases
when dr iv ing fast, especially t hrough curves
a nd on slippery or wet roads, and when dr iv­
ing too close to objects ahead. The ESC and
its integrated systems ca nnot always pre­
vent collisions
-there is st ill a ris k of ac ci-
dents!
..,.
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CXl CXl .... N ,.__
N .... 0 N > 00
-There is no vehicle stabilization when ESC/
ASR are switched off.
(D Tips
-ESC/ASR cannot be switched off or sport
mode cannot be switched on if the cruise
control system * or the adaptive cruise con­
tro l* is sw itched on.
-Malfunctions in the Audi magnetic ride *
may make it imposs ible to switch the ESC/
ASR off or to switch sport mode on.
Brakes
New brak e pad s
New brake pads do not achieve their full braking
effect during the first 2S0 mi (400 km) . They
must be "broken in" f irst. However, you can com­
pensate for the slightly reduced braking force by
pressing firmly on the brake pedal. Avoid heavy
braking during the break-in per iod.
Wear
B rake pad
wear depends largely on the way the
veh icle is driven and on operat ing cond itions.
This is especially true if you are driving frequently
in the c ity and on curves or with a sporty driving
style.
Operat ing no ise
Noises may occur when braking depending on the
speed, braking force and outs ide cond itions such
as temperature and humidity .
Effect of wat er and road salt
In certain situations, for example after driving
through water, in heavy rain, after overnight con ­
densation 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
"dr ied" first w ith a few careful brake applica­
tions .
At higher speeds and with the windsh ield 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 d river , happens at regular
Intellig ent Technology
interva ls and ensures a better reaction time for
the brakes in wet weather.
T he brak ing effect ca n also be reduced if yo u are
driv ing on sal ted roads and yo u do not app ly the
brakes for long per iods o f time. The layer o f salt
on the brake rotors and pads must be worn off
first when the brakes are applied.
Corrosion
Leav ing the veh icle pa rked for long periods of
time, low mileage and avoiding heavy b raking
can contribute to corrosion on the brake roto rs
and to dirty brake pads .
If you usua lly avoid heavy bra king or if there is
corrosion present, occasiona l heavy brak ing at
high speeds is recommended to clean the brake
rotors and
pads ¢,& .
Brake system malfunction
If you notice that the bra ke pedal travel has sud ­
denly inc re ased, then a br ake circuit in the dua l­
c ircuit b rake system may have malfunctioned.
Drive to an authorized Audi dealer or authorized
Audi Service Facility immediate ly to have the
problem corrected. On the way there, drive with
reduced speed and keep in mind that you will
need a longer distance to stop and you will need
to press the brake pedal harder.
L o w bra ke fluid le ve l
When the brake fluid level is low, malfunctions in
the brake system may occur. The brake fluid level is electronically monitored.
Brake bo oster
The brake boos ter amplifies the p ressure you ap ­
ply to the brake pedal. It on ly operates whi le the
engine is running or when the ignition is switched
on (p lug-in hybrid dr ive*) .
A WARNING
-Only app ly the brakes for the purpose of
cleaning the brake system when road and
traffic cond itions permit. You must not en­
danger other road users. This increases the
risk of an accident.
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