Audi adaptive cruise control and braking guard
Audi braking guard
Description
Applies to vehicles: with Audi adaptive cruise co ntro l
Fig. 102 Instrument cluste r: approach warning
Braking guard uses a radar sensor. It also func
tions within the limits of the system when adap
tive cruise control is switched off .
What can Audi braking guard do?
When detected in time, the system can assess
situations when a vehicle ahead brakes suddenly
or if your own vehicle is traveling at a high speed
and approaching a vehicle up ahead that is mov
ing more slowly . Braking guard does not react if
it cannot detect the situat ion.
The system advises you of various situations:
- The
distance warning is given if you are too
close to the vehicle ahead for a long time. If the
vehicle ahead brakes sharply, you will not be
able to avoid a collision. The indicator light .
in the display comes on.
- The
approach warning is given when a detected
vehicle up ahead in your lane is moving much
more slowly than you are or if it brakes sharply .
When this warning is g iven, it may only be pos
s ib le to avoid a collision by swerving or brak ing
sharply. The indicator light . and indicator in
the display will warn you about the danger
¢ fig. 102 . You will also hear an acoustic signal.
If you do not react fast enough or do not react at
all to the situation, Braking guard will intervene
by braking and the message
braking guard inter-
;::; vention
will appear.
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rl
"' 1> Th
is is not availab le in some co untries. rl
-If a collision is imminent, the system wi ll first
provide an
acute warning by briefly and sharply
apply ing the brakes.
- If you do not react to the acute warning, brak
ing guard can brake within the limits of the sys
tem. This reduces the vehicle speed in the event of a collision.
- At speeds under 20 mph (30 km/h), the system
can initiate a comp lete decelerat ion shortly be
fore a collision
ll.
- If the braking guard senses that you are not
braking hard enough when a collision is immi
nent, it can increase the braking force .
Which functions can be controlled?
You can switch braking guard and the distance/
approach warn ing on or off in the radio or MMI
¢ page 96, Settings in the radio/MM! .
A WARNING
-
Lack of attention can cause collisions, other
accidents and ser ious personal in juries. The
braking guard is an assist system and cannot
prevent a collision by itself. The driver must
always intervene. The driver is always respon
sible for braking at the correct tim e.
- Always pay close attention to traffic, even
when the braking guard is switched on. Be
ready to intervene and be ready to take
comp lete control whenever necessary. Al
ways keep the safe and legal distance be
tween your vehicle and vehicles up ahead .
- Braking guard works within limits and will
not respond outside the system limits, for
examp le when approaching a stopped veh i
cle or stationary obstacle (end of a traff ic
jam or vehicle that has broken down in traf
fic).
- Always remember that the radar sensor for
the braking guard works only within def ined
detection and range limits that may prevent
the proper detect ion of other vehicles.
- The radar sensor's function and range can
be reduced by rain, snow and heavy spray.
Moving vehicles up ahead may not be
,.
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Audi adaptive cruise control and braking guard
promptly detected or may not be detected
at all.
- Reflective surfaces including crash barriers
or tunnel entrances may impair the function
oftheradarsensor.
(D Tips
-You can cancel the braking that is initiated
by the system by braking yourself, by accel
erating noticeably or by swerving.
- Braking guard error messages ¢
page 96.
- Keep in mind that braking guard can brake
unexpectedly. Always secure any cargo or
objects that you are transporting to reduce
the risk of damage or injury.
Settings in the radio/MM!
Applies to veh icles: w ith Audi adaptive cruise co ntrol
.,. Select : ICARI function button> Car systems*
control button > Driver assist> Audi braking
guard .
Or
.,. Select :
~I C-A-R~I funct ion button > Audi braking
guard .
System -
Switch Audi braking guard On and Off .
When you switch the ignition on, the message
Audi braking guard off appears if the system is
sw itched off.
Early warning -The distance and approach warn
ings in the display can be sw itched
On/ Off.
@ Tips
-Your settings are automatically stored and
assigned to the remote control key being
used at the times the sett ings are made .
- If you restrict or sw itch off the ESC, the
braking guard also switches itself off
¢page 171.
- Switch braking guard off when you are load
i ng the veh icle onto a vehicle carr ier, train,
sh ip or other type of transportation . This
can prevent undesired warnings from the
braking guard system.
96
Messages
Applies to vehicles: with Audi adapt ive c ru ise control
Braking guard: Off
This dr iver message appears if the system is
turned off via the radio/MM I* . Otherwise, if the
system is turned off, the information appears
ev
ery time shortly after the start of the trip.
The driver message also appears if the system is
not available due to a malfunction or if the ESC is
not switched on
¢ page 171 . If th is is the case,
the system wi ll not provide warnings about a
possible collision .
Braking guard: Activated
This dr iver message appears if sharp brake pres
sure was applied due to an acute warning .
•••
Three white dots appear if a setting cannot be se
l ected with the operating lever. For example, this
happens if you want to raise/lower the speed
even though there was no previously saved
speed .
ACC: Deactivation
The driver message appears in vehicles with man
ual transmission. If the clutch pedal was pressed
down for too long, the adaptive cruise control
turns off. A chime sounds as a reminder.
ACC: Sensor blocked
This message appears if the sensor v iew is ob
structed, for examp le by leaves, snow , heavy
spray or dirt. Clean the sensor¢
page 89, fig. 92.
ACC: not available
The driver message appears if there is a malfunc
tion. The adaptive cruise control turns off. A
chime sounds as a reminder . Have the system
checked by an authorized Audi dealer or author
i zed Audi Service Facility.
ACC: unavailable
The driver message appears if, for example, the
brake temperature is too high. The adaptive
cruise contro l is temporarily unavailable . A chime
sounds as a reminder. ..,.
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E ngine sp eed!
This drive r message appea rs in vehicles w it h
manual transm iss ion if the drive r had not up
shifted or downshifted in t ime wh ile using adap
tive cruise control braking or acce lerating, caus
ing the vehicle to exceed or not reach the permit
ted limit speed. The adapt ive cru ise control turns
off. A chime sounds as a reminder .
Shift l ever po siti on!
Veh icles with an automatic transmission : the
d river message appea rs if the selector leve r is
shifted to the N position . T he adapt ive cru ise
control is not available while in this position.
Veh icles with manual transmission : th e d river
message appea rs fo r vehicles wit h manual trans
miss ion if there is no forward gea r engaged,
meaning if the reverse gear or the 1st gear is en
gaged or if the selector lever is in the neutra l po
sition . The adaptive cru ise control is not avai lab le
while in this posit ion.
Stabilization control (ESC )
This message appea rs if the electronic stab iliza
tion contro l (E SC) is tak ing action to stab il ize the
ve hicl e. The adap tive cruise contro l tu rns off. A
chime sounds as a reminder .
Sp eed too low
T his message appears if the current speed is too
low to set or to maintain the desired speed.
The speed being saved must be at least 20 mph (30 km/h). The cru ise control is turned off for
speeds lower than 12 mph (20 km/h) . The adap
tive cruise control remains turned on for speeds
above 95 mph (150 km/h) (override) . It will sta
b ili ze again at 95 mph (150 km/h) when the d riv
e r takes his foot off of the gas pedal.
P a rking brake!
The driver message appears when the park ing
brake is activated . Adaptive cruise contro l is
turned off . A chime sounds as a reminder .
97
proper deployment of the airbag. Small ob
jects can be thrown through the vehicle if the airbag deploys and injure you or your passengers.
Pedal area
Pedals
The pedals must always be free to move and
must never be interfered with by a floor mat or
any other object.
Make sure that all pedals move freely without in
terference and that nothing prevents them from
returning to their original positions.
Only use floor mats that leave the pedal area free
and can be secured with floor mat fasteners.
If a brake circuit fails, increased brake pedal trav
el is required to bring the vehicle to a full stop .
A WARNING
Pedals that cannot move freely can cause loss
of vehicle control and increase the risk of seri
ous lnJUry.
- Never place any objects in the driver's foot
we ll. An object could get into the pedal area
and interfere w ith pedal function. In case of
sudden braking or an accident, you would
not be able to brake or accelerate!
- Always make sure that nothing can fall or
move into the dr iver's footwell.
Floor mats on the driver side
Always use floor mats that can be securely at
tached to the floor mat fasteners and do not in
terfere with the free movement of the pedals.
• Make sure that the floor mats are properly se
cured and cannot move and interfere with the
pedals ~
&-
Use only floor mats that leave the pedal area un
obstructed and that are firmly secured so that
;::; they cannot slip out of pos it ion. You can obtain
~ suitable floor mats from yo ur authorized Aud i
~ dealer. Lil ,...., v:, ,....,
Driving safety
Floor mat fasteners are installed in your Audi.
Floor mats used in your vehicle must be attached
to these fasteners . Properly securing the floor
mats will prevent them from slid ing into posi
tions that could interfere with the pedals or im
pair safe operation of your vehicle in other ways.
A WARNING
-Pedals that cannot move freely can result in a
loss of vehicle control and increase the risk of
serious personal injury.
-Always make sure that floor mats are prop
erly secured.
- Never p lace or install floor mats or other
floor coverings in the vehicle that cannot be
properly secured in place to prevent them
from slipping and interfering with the ped als or the ability to control the vehicle .
- Never place or install floor mats or other
floor coverings on top of already installed
floor mats . Additional floor mats and other
cover ings will reduce the size of the pedal
area and interfere with the pedals.
-Always properly re insta ll and secure floor
mats that have been taken out for clean ing .
- Always make sure that objects cannot fall
into the driver footwe ll whi le the vehicle is
mov ing. Objects can become trapped under
the brake pedal and accelerator pedal caus
ing a loss of vehicle control.
117
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recorded by the Event
Data Recorder and
vehicle control modules
E ve nt Dat a Record er
This vehicle is equipped wi th an Event Data Re
corder (EDR) . The main purpose of an EDR is to
record, in certain crash or near crash-like situa
tions, such as an a irbag deployment or hitting a
road obstacle, data that will assist in understand
ing how a vehicle's systems performed. The EDR
is designed to record data related to vehicle dy
namics and safety systems for a short period of
time, typically 30 seconds or less. The EDR in this
ve hicle is designed to reco rd such data as:
- How various systems in your vehicle were oper
at ing;
- Whether or not the driver and passenger safety
belts were buckled/fastened;
- How far (if at all) the dr iver was depressing the
accelerator and/or brake pedal; and,
- How fast the vehicle was traveling.
These data can he lp provide a better understand
ing of the c ircumstances in which crashes and in
juries occur. NOTE: EDR data are recorded by your
veh icle only if a non-trivia l crash situation occurs;
no data are recorded by the EDR under normal
driving conditions and no personal data (e .g.,
name, gender, age, and crash location) are re
corded. However, other parties, such as law en
forcement, cou ld combine the EDR data w ith the
type of personally identifying data routine ly ac
quired during a crash investigation.
To read data recorded by an EDR, specia l equip
ment is req uired, a nd access to the ve hicle or the
E DR is needed. In add it ion to the vehicle manu
facturer, other parties, such as law enforcement,
that have the specia l equipment, can read the in
formation if they have access to the vehicle or the
EDR .
Some state laws restrict the retr ieval or down
l oading of data stored by ED Rs insta lled in a vehi
cle for the express purpose of retrieving data af-
Intellig ent Technology
ter an accident or crash event without the own
er's consent.
Audi will not ac cess the EDR and/or sim ilar data
o r give it to others -
- unless the vehicle owne r (or lessee if the vehi
cle has been leased) agrees; o r
- upon the official request by the police; or
- upon the order of a court of law or a govern-
ment agency; or
- for the defense of a lawsuit through the judic ial
discovery process.
- Aud i may a lso use the data for research about
veh icle operation and safety performance or
prov ide the data to a third party for research
purposes without identify ing the specific veh i
cle or info rmat io n about the ident ity of its own
er or lessee and only afte r the reco rded veh icle
data has been accessed.
Vehicle control modules
Your vehicle is also equ ipped w ith a number of
electronic control modules for va rious vehicle
systems, such as engine management, emiss io n
contro l, airbags, and s afety be lts.
These electronic control modules record data dur ing norma l vehicle operation that may be
needed by trained tech nicians for diagnost ic and
r epa ir purposes. The re cording capab il ity of these
modules is lim ited to data (no sound is record
ed). Only a sma ll amount of data is actua lly re
corded over a very limited period of time, or stor
ed when a system fault is detected by a control
module . Some of the data stored may relate to
vehicle speed, direction, or braking, as well as re
straint system use and performance in the event
of a crash. Stored data can also on ly be read a nd
down loaded w ith specia l equipment that is d i
rectly connected to the vehicle.
(D Tips
Your vehicle may be equipped w ith Aud i con
nect. Your use of certain Aud i connect fea
tures requi res wire less serv ices that are pro
v ided by a third party wireless telecomm uni
cations provi der. For de tails regarding how in
formation obtained through Aud i connect is
collected, processed, transmitted, used, and ..,.
169
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shared, please see your contract with the
wireless te lecommunications provider and the
"About Aud i connect" tab in your vehicle's
MMI*:
I MENU ! button > Audi connect > About
Audi con nect .
Electronic Stabilization
Control (ESC)
Description
E SC helps to imp rove ro a d hold ing and vehicle
dynamics to help reduce the probab ility of skid
d ing and loss of veh icle control. It works only
when the engine is runn ing . ESC detects certain
d iffic ult dr iving situat io ns, including when the
ve hicl e is begin ning to spin (yaw) o ut of contro l
a nd h elps you to ge t the veh icle b ack u nder con
trol by se lectively braking the wheels, and/or re
ducing engine powe r and providing steering as
sistance to help hold the vehicle on the driver's intended course. The indicator light
GI in the in
strument cluster blinks when ESC is tak ing action
t o he lp you contro l the vehicle.
ESC has lim itations. It is important to remembe r
that ESC cannot overcome the laws of physics. It
will not a lways be able to help out under all con
d itions you may come up aga inst . For example,
ESC may not always be able to help you master
situations where there is a sudde n change in the
coeff ic ie nt of fr iction of the road surface. W hen
there is a se ction of dry road tha t is sudde nly cov
e red with w ater, slush o r sn ow , ESC c annot pe r
form the same way i t wou ld on the dry s urface. If
the vehicle hydrop lanes (rides on a cushion of wa
ter instead of t he road su rface), ESC wi ll not be
ab le to he lp you stee r the veh icle because contact
with the pavement has been inter rupted and the
ve hicle cannot be b raked or steered . Dur ing fast
cornering, part icu larly on w inding roads, ESC
can not always deal as effect ive ly w it h difficult
d riving situat ions than a t lowe r speeds . When
towi ng a trail er, ES C i s not able to help you re
g ai n con trol as it would if you we re not towing a
tra ile r.
A lways ad just yo ur speed and driving sty le to
road , tr affic and weathe r cond itions. ESC canno t
override the vehicle's phys ical lim its, incre ase the
170
available tract ion, or keep a vehicle on the road i f
r oad depa rt u re is a res ult of d river inattention .
Instead, ESC improves the poss ib ili ty of keeping
the ve hicle unde r contro l and on the road d uring
extreme maneuvers by using the driver's steer ing
i nputs to help keep the vehicle going in the in
tended direction . If you are traveli ng at a speed
t h at causes you to r un off the road before ESC
can p rovide any assista nce, you may not exper i
ence the benefi ts of ESC.
ESC is switched on all the time. In certa in s itua
tions when you need less tract ion, yo u can sw itch
off AS R by press ing the button
I!] c:> page 171,
fig. 152 or c> page 171 , fig. 153. Be s ure to
swi tch ASR on again w hen you no longer need
l ess trac tion.
The following systems a re in tegrated in the ESC:
Anti-lock braking system (ABS)
ABS prevents the wheels from locking up when
braki ng . The vehicle can st ill be steered even d ur
i ng hard b raking . Apply steady p ressure to the
brake peda l. Do not pump the pedal. A p uls ing in
t h e b rake pedal indica tes th at th e system is help
i ng yo u to b rake t he ve hicle.
Brake assist system
The bra ke assist system can decrease braking dis
ta nce. It increases b raking powe r whe n the dr iver
presses t he br ake peda l quickly i n emergency sit
u at io ns. Yo u must pre ss and ho ld the bra ke peda l
u nt il t he s itu at ion is ove r. In vehicles wi th adap
tive cr uise con trol *, the brake assist sys tem is
more sensitive if t he di stance detected to the ve
h icle ahead is too sma ll.
Anti-slip regulation (ASR)
ASR redu ces engine powe r whe n the dr ive whee ls
begin to spi n and a da pts the fo rce to the road
con ditio ns. Thi s ma kes it easier to s tart, acce le r
ate and d rive up hills .
Electronic differential lock (EDL)
The ED L brakes w heels that are spi nning and
t ra nsfe rs the dr ive power to the ot her dr ive
whee l or w heels if the vehicle is equ ipped with
a ll- wheel drive*. This function is not avai lab le at
h ighe r speeds. .,..
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In extreme cases, EDL automatically switches off
to help keep the brake on the braked wheel from
overheating. EDL w ill switch on aga in automati
cally when conditions have returned to normal.
Steering recommendation
The ESC helps to stabilize the vehicle by changing
the steering torque .
In vehicles with dynamic steering*, ESC also
helps to stabilize the steering in critical situa
tions.
Electronic interaxle differential lock*/
selective wheel torque control*
The electronic interaxle differential lock (front
wheel drive) or the selective wheel torque control
(all wheel drive) operates when driving through
curves . The front wheel on the inside of the curve
or both wheels on the inside of the curve are
braked selectively as needed. This allows more
precise driving in curves. The applicable system
may not activate when driving in wet or snowy
conditions .
_&, WARNING
- The ESC and its integrated systems cannot
overcome the laws of phys ics. Th is is espe
cially important on slippery or wet roads.
If
the systems begin acting to stabilize your
Switching on /off
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veh icle, you should immediately change
your speed to match the road and traffic conditions. Do not let the increased safety
provided by these systems tempt you to
take risks. Doing so will increase the risk of
a loss of vehicle control, collision and seri
ous personal injuries.
- Always adapt your speed to road, traffic and
weather conditions. The risk of losing con
trol of the vehicle increases when driving
too fast, especially through curves and on
slippery or wet roads, and when driving too
close to vehicles up ahead . The ESC and its
integrated systems cannot always prevent
collisions -there is still a risk of accidents!
- Always accelerate with special care on even,
smooth surfaces such as those that are wet
or covered with ice and snow. The drive
wheels can spin even with these assistance systems that cannot always help to reduce
the risk of loss of vehicle control.
{!) Tips
- ABS and ASR only work correctly when all
four wheels are equipped with identical
tires. Different tire sizes can lead to a reduc
tion in engine power.
- You may hear noises when the systems de
scribed are working .
ESC turns on automatically when you start the engine.
Fig. 152 Version A: lower center console,~ OFF button
The ESC is designed to function in levels. Depend
ing on the level that is selected, the stabilization
function of the ESC is limited or switched off. The
Fig. 153 Version B: upper center console,~ OFF button
amount of stabilization control will differ de
pending on the level.
a, N N N ,.: CX) m
171
Intelligent Technology
The fo llowing s ituations are exceptions where it
may be useful to switch on sport mod e to a llow
the wheels to sp in : -
Rock ing the vehicle to free it when it is stuck
- Dr iv ing in deep snow or o n loose g ro und
- Dr iving with snow chains
Sport mode on ESC/ASR off Sport mode off or
ESC/ASRon
Beha vior
The ESC and ASR stabiliza- The stabilization funct ion is The f ull stabilization fun c-
t ion f un ct ions are lim ited not availab
le ¢ ,&. . ESC and
tion of the ESC and ASR is
¢ .&. .
ASR are switched off. ava ilab le aga in.
Op era tion Press the I 1> OFF I button Press and hold the !1> O FFI Press the I,, OFF I button
briefly . button longer than 3 sec- again.
onds .
In dicato r II turns on.
• and lf'lii•li~ turn on . II turns off or II and
light s lf'lii•l~~ turn off.
Driv er m es- Stabilization contr ol (E S C): Stabilization control (ESC ): Stabilization control
s age s Sport. Warning! Restri cted off . Warning ! Re stri cted (ESC
): On
s t a bilit y stabilit y
It is only possible to t urn off the ASR up to 30
mph (SO km/h) fo r vehicles w ith front wheel
d rive. At about 45 mph (70 km/h) it automatical
ly tu rns on again. It is possible to turn off the
ASR at any speed for vehicles w ith all whee l
drive .
A WARNING
You should only switch sport mode on or
switch ESC/ASR off if your driving abilities
and road conditions permit .
-
-The stabilization function is limited when
sport mode is sw itched on . The driving
wheels co uld spi n and the vehicle could
swerve , espec ia lly on s lick o r slippery road
s ur faces.
- The re is no vehicle stab ilizat ion when ESC/
ASR a re switched off.
(D Tips
ESC/ASR cannot be sw itched off or sport
mode cannot be switched on when cruise co n
t rol or adaptive cruise control* is switched on .
172
Braking
What affects braking efficiency?
New brake pads
D ur ing the first 250 miles (400 km) , new brake
pads do not possess their full b raking effe ct, they
have to be "b roken in" first ¢,&. . You can com
pensa te for th is slightly reduced b raking power
by p ushing harder on the brake pedal. Avo id
heavy braking loads dur ing the break-in period .
Operating conditions and driving habits
The brakes on today's automobi les are s till sub
je ct to wear, depending large ly on operating con
dit ions and driving habits ¢.&. . On vehi cles that
a re either driven mostly i n stop-and-go city traf
fic or are drive n hard, the b rake pads sho uld be
checked by your authorized A udi dealer more of
ten than specified in the
Wa rrant y & Mainte
nance book let .
Failure to have your brake pads
i nspected can result in reduced brake perform
ance .
On steep slopes, you should use the brak ing ef
fect of the engine . Th is way, you prevent unnec
essary wear on the brake system . If you must use
your brakes, do not ho ld the bra kes down contin
u ously. P ump the bra kes at inte rvals.