Page 97 of 294

Audi adaptive cruise control and braking guard 95
Audi adaptive cruise
control and braking
guard
Introduction
App lies to vehicles: with Audi adaptive cruise co ntrol
The adaptive cruise control system assists the
driver by regu lating vehicle speed and helping
to maintain a set distance to the vehicle
ahead, within the limits of the system . If the
system detects a moving vehicle up ahead,
adaptive cruise control can brake and then ac
celerate your vehicle. This he lps to make driv
ing more comfortable on long highway
stretches.
The braking guard system can warn you about
an impending collision and initiate braking
maneuvers
c::;, page 101.
Adaptive cruise control and braking guard
have technical limitations that you must
know , so please read this section carefully, un
derstand how the system works and use them properly at all times.
General information
General information
Applies to vehicles: with Audi adaptive cruise control
Fig. 97 Front of the veh icle: Pos ition of radar sensor
The area that contains the radar sensor
c::;, fig. 97 must never be covered by st ickers or
other objects or obstructed with dirt, insects,
snow or ice that will interfere with the adap
tive cruise control system and Audi braking
guard. For information on cleaning, refer to
c::;, page 202. The same applies for any modifi
cations made in the front area . The
function of the adaptive cruise contro l
system and braking guard is limited under
some cond itions:
- Objects can only be detected when they are
within sensor range
c;,page 97, fig . 100 .
-The system has a limited ability to detect
objects that are a short distance ahead, off
to the side of your vehicle or moving into
your lane.
- Some kinds of vehicles are hard to detect;
for examp le motorcycles, vehicles with high
ground clearance or overhanging loads may
be detected when it is too late or they may
not be detected at all.
- When driving through curves
c::;, page 96.
-Stationary objects c::;, page 96 .
A WARNING
-Always pay attention to traffic when adap-
tive cruise control is switched on and brak ing guard is active. As the dr iver, you are
still responsible for starting and for ma in
tain ing speed and distance to other ob
jects. Braking guard is used to assist you.
The driver must always take action to avoid
a collision. The driver is always responsible
for braking at the correct time.
- Improper use of adaptive cruise con trol
can caus e collisions, other accidents and
serious personal injury .
- Never let the comfort and convenience
that adaptive cruise control and Audi
braking guard offer distract you from the
need to be alert to traff ic conditions and
the need to remain in full control of yo ur
veh icle at a ll times,
- Always remember that the adaptive
cru ise contro l and Aud i brak ing guard
have lim its -they will not slow the vehi
cle down or maintain the set d istance
when you drive towards an obstacle o r
someth ing on or nea r the road that is not
moving, such as vehicles stopped in a
traffic jam, a stalled or disabled vehicle.
If registered by the radar sensor, vehicles
or obstacles that are not moving can
trigger a collision warning and if .,.
Page 98 of 294

96 Audi adaptive cruise control and braking guard
confirmed by the video camera, an acute
collision warning.
- For safety reasons, do not use adaptive
cruise control when driving on roads with
many curves, when the road surface is in
poor condition and/or in bad weather
(such as ice, fog, gravel, heavy rain and
hydroplaning). Using the system under
these conditions could result in a colli
sion.
- Switch adaptive cruise control off tempo
rarily when driving in turning lanes, on
expressway exits or in construction
zones. This prevents the vehicle from ac
celerating to the set speed when in these
situations.
- The adaptive cruise control system will
not brake by itself if you put your foot on
the accelerator pedal. Doing so can over
ride the speed and distance regulation.
- When approaching stationary objects
such as stopped traffic, adaptive cruise
control will not respond and braking
guard will have limited function.
- The adaptive cruise control system and
braking guard do not react to people, an
imals, objects crossing the road or on
coming objects .
- The function of the radar sensor can be
affected by reflective objects such as
guard rails, the entrance to a tunnel,
heavy rain or ice.
- Never follow a vehicle so closely that you cannot stop your vehicle safely. The
adaptive cruise control cannot slow or
brake the vehicle safely when you follow
another vehicle too closely . Always re
member that the automatic braking
function cannot bring the vehicle to a sudden or emergency stop under these
conditions.
- To prevent unintended operation, always
switch ACC
off when it is not being used.
{[) Note
The sensor can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. That could affect the adaptive cruise control system and braking guard.
Have your authorized Audi dealer or au
thorized Audi Service Facility check their
function.
, In curves
App lies to vehicles: wi th Audi ada ptive c ruise contro l
Fig. 98 Example: d riving i nto a curve
When driving into a curve ~ fig. 98 and out of
a curve, the adaptive cruise control may react
to a vehicle in the next lane and apply the
brakes. You can override or prevent the brak
ing by pressing the accelerator pedal briefly.
Stationary objects
Applies to vehicles : wi th Audi adapt ive crui se contro l
Fig. 99 Example: object changing lanes a nd stat ionary
object
The adaptive cruise control system only reacts
to objects that are moving or that the system
has already detected as moving. For example,
if a vehicle @, which has already been detect
ed by the adaptive cruise control, turns or
changes lanes and another stationary vehicle
@ is located in front of that vehicle, the sys
tem will not react to the stationary vehicle.
Page 99 of 294

Audi adaptive cru ise control and brakin g guar d 97
Vehicles with manual transmission
Applies to vehicles: with Audi adaptive cruise control
The adaptive c ruise control is avai lab le from
the 2nd gear through the 6th gea r in the cus
tomary RPM.
When the adapt ive cruise control is turned on,
you must p ress the clutch to shift gears (as
usual) . When sh ifting normally or when press
ing the cl utch, the adap tive c ruise control re
mains turned on.
Afte r you have engaged the gear, you do
not
need to press the gas peda l. The adaptive
cru ise control accelerates a utomat ica lly if nec
essary.
I f you press dow n on the clutch fo r too long or
shift/coup le improperly, the adaptive cruise
control may turn off automat ically.
{D) Tips
You cannot tu rn on the adapt ive cru ise
contro l during a sh ifting operation.
Audi adaptive cruise
control
Description
App lies to vehicles: with Audi adaptive cruise control
Fig . 1 00 Detect ion range
What c an adaptive cruise contr ol do ?
The adaptive cruise control wor ks in conjunc
tion with a radar sensor installed in the front
of the vehicle¢
page 95 , fig. 97, which is sub
ject to designated system limits ¢
page 97.
Stationa ry objects are d is regarded .
On open roads w ith no traff ic, adaptive cruise
control works like a regular cruise control sys- tern.
The stored speed is maintained . When
approaching a moving vehicle detected up
ahead, the adaptive cruise control system au
tomat ically s lows down to match that vehi
cle's speed and then maintains the distance
that the driver previously stored . As soon as
the system does not detect a veh icle up
ahead, adaptive cru ise contro l accelerates
ba ck up to the stored speed.
Which fun ctions can be controlled?
When you switch adapt ive cruise control on,
you can set the current speed as the "control
speed" ¢
page 98, Switching on and off .
When driving, you can stop cruise contro l
¢
page 99 or change the speed¢ page 99
at any time.
You can also set the distance to the object
ahead and set the adapt ive cru ise control driv
ing program
¢page 100.
Page 100 of 294

98 Audi adaptive cruise control and braking guard
Switching on and off
Applies to vehicles: with Audi adaptive cruise co ntrol
Fig. 101 Selec tor lever: switching on/off
Fig . 102 Instrument clus te r: adap tive cru ise control
You can set any speed between 20 mph and
95 mph (30 and 150 km/h).
Indicator lamps and messages in the instru
ment cluster display inform you about the cur
r ent system status and settings.
Switching adaptive cruise control on
.. Pull the lever toward you into posit ion @
-:>fig . 101 . ACC standby appears in the in
strument cluster d isplay .
Setting the speed and activating
regulation
.. To set the current speed , press the ISET !
button r:::> page 11 , fig. 4. The set speed is shown in the tachometer
@and is also
shown briefly in the display@r:::>fig.
102.
Switching adaptive cruise control off
.. Push the lever away from you into pos itio n
@ unt il it clicks into place. The message
ACC off appears.
@ Indicator lights
II-Adaptive cruise control is switched on. No
vehicles are detected up ahead. The stored
speed is maintained.
I -A moving vehicle is detected up ahead .
T he adapt ive cru ise control system regulates
the speed and distance to the moving vehicle
ahead and accelerates/brakes automatically.
I -When automatic braking is not able to
keep e nough d istance to a prev iously detected
moving veh icle up ahead, you must take con
trol and brake
r:::> page 101, Request for driver
intervention.
© Display
If adapt ive cru ise control is not shown in the
display, you can call it up w ith the
I RESET I
button r:::> page 24.
Based on the symbols in the display, you can
determine if the system is maintai ning a d is
tance to the vehicle ahead and what that dis
tance is.
No vehicle -No vehicle ahead was de tected .
White vehicle -A vehicle ahead was detected .
Red vehicle -Prompt for the driver to take ac
tion
r:::> page 101 .
Both arrows on the scale© indicate the dis
tance to the vehicle ahead. No arrow appears
when the vehicle is on an open road and there
is no object ahead. If an object is detected
ahead, the arrow moves on the scale .
T he green zone on the scale shows the stored
distance. For information on changing the
stored distance, refe r to ~
page 100 . If the
distance se lected is too close or may soon be
com e too close , the arrows move into the re d
z one on the sca le.
Page 101 of 294

Audi adapt ive crui se c ontrol an d bra kin g guard 99
A WARNING
Imprope r use of the adaptive cruise con
trol can cause collis ions, other acc idents
and serious personal injuries.
- Pressing the
ISE TI button whe n driving at
speeds below 20 mph (30 km/h), will au
tomat ica lly accelerate the veh icle to
20 mph (30 km/h), which is the m ini
mum speed that can be set.
@ Tips
- If you switch the ignition or the adapt ive
cruise control off, the set speed is erased
from the system memory.
- The elect ronic stabilization control (ESC)
and the a nti-slip-regulation (ASR) are au
tomatically tu rned on when the adaptive
cruise control is turned on. Both systems
cannot be turned off if the adaptive
cruise control is turned on.
Changing the speed
Applies to vehicles: with Audi adaptive cruise co ntrol
~ 0) g
±. .., 0 al
f
• 0
Fig. 103 Se lecto r lever: cha nging t he speed
• To increase or red uce the speed in incre
me nts ,
tap the lever up or down.
• To increase or reduce the speed quickly ,
hold the lever up or down unt il the red L ED
@ reaches the desired speed ¢ page 98,
fig. 102.
Following any changes, the new sto red speed
will be displayed briefly in the disp lay @
¢page 98, fig. 102 .
Interrupting c ruise control
App lies to vehicles: with Aud i adapt ive cruise contro l
F ig. 104 Selecto r lever
Requ irement: adaptive cru ise control must be
switched on ¢
fig. 104 (D.
Ove rriding crui se cont rol
• To acce lerate manually, p ress the acce le ra
tor peda l. The message
ACC over ride ap
pears.
• To resume adaptive cruise contro l, remove
your foot from the gas pedal. The system re
turns again to the speed that was saved be
fore .
• You can save a new speed at any time by
pressing the
! SE TI button ¢ page 11, fig. 4.
Canceling cruise control while driv ing
• Move the lever into position @. The mes
sage
ACC st andby appears . Or
• press the brake pedal.
• To res ume the stored speed, move the lever
into position @.
A WARNING
Never resume the stored speed if the
speed is too high for prevailing road, tra f
fic or weather condit ions.
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100 Audi adaptive cruise control and bra king guard
Setting the distance
App lies to vehicles: with Audi adaptive cruise control
Fig. 105 Selector lever: setting the distance
~ Tap the switch to display the current set dis
tance¢
fig. 105.
~ To increase or reduce the distance by incre
ments, tap the switch again to the left or
right. The distance between the two veh icles
will change in the instrument cluster dis
play.
When approaching a moving vehicle up ahead,
the adaptive cru ise cont rol system brakes to
matc h that object's speed and then maintains
the stored distance. If the vehicle ahead ac
celerates, adaptive cruise control will a lso ac
celerate up to the stored speed.
The higher the speed, the greater the distance
in yards (meters)¢ ,&.. T he
Distance 3 setting
is recommended .
The distances p rov ided are spec ified values.
Depending on the driving situation and the
how the vehicle ahead is dr iving, the actual
distance may be more or less than these tar
get distances .
The various symbols fo r the time increments
appear briefly in the in fo rmation line @
c;, page 98, fig. 102 when you change the set
tings .
c::::::,_c::::::, ___ Distance 1: This setting corre-
sponds to a distance of 92 feet/28 meters
when traveling at 62 mph (100 km/h), or a
time interva l of 1 second.
c::::::, __ c::::::, __ Distance 2: This setting corre
sponds to a distance of 118 feet/36 meters
when traveling at 62 mph (100 km/h), or a
time interval of 1.3 seconds .
c::::::, ___ c::::::,_ Distance 3: This setting corre-
sponds to a distance of 164 feet/SO meters
when traveling at 62 mph (100 km/h), or a
t ime interval of 1.8 seconds.
c::::::, ____ c::::::, Distance 4: This setting corre-
sponds to a distance of 210 feet/64 meters
when traveling at 62 mph (100 km/h), or a
t ime interval of 2.3 seconds.
A WARNING
Following other veh icles too closely in
creases the risk of collis ions and ser ious
personal injury.
- Sett ing short distances to the traffic
ahead reduces the time and d istance
availab le to bring your vehicle to a safe
stop and makes it even more necessary
to pay close attention to traffic.
-
-Always obey applicab le traffic laws, use
good judgment, and se lect a safe follow
ing distance for the traffic, road and
weather conditions .
0) Tips
-Distance 3 is set automatically each time
you switch the ignition on.
- Your standard sett ings are automatically
stored and ass igned to the remote con
trol key being used.
Setting the driving program
Applies to vehicles: with Audi adaptive cruise control
Depending on the selected driving program
and distance, driving behavior when accelerat
ing will vary from dynamic to comfortable .
Setting the driving program for vehicles
without Audi drive select*
~ In the radio/MM!*, select : ICARlfunction
button >
Adaptive cruise control > Driving
prog.
> comfort, standard or dynamic . Or
~ Select: !CAR ! function button> Car sys
tems *
control button > Driver assist > Adap
tive cruise control
> Driving program * >
Comfort, Standard or Dynamic .
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Audi adaptive cruise control and braking guard 101
Setting the driving mode for vehicles with
Audi drive select*
Refer to <=> page 1 10.
(D Tips
Yo ur setti ngs a re automatically store d an d
assig ned to the remote contro l key be in g
used.
Request for driver intervention
A pp lies to vehicles: w ith Audi a daptive cruise control
Fig. 106 Inst rumen t cl uster: reques t fo r drive r in te r·
ve ntio n
In ce rtain si tuations, t he sys tem w ill prom pt
you to take actio n. This cou ld ha ppen, for ex
ample, if braking by the a daptive cr uise con
trol system is not enough to maintain enough
d istance to the vehicle ahead.
The inst rument cluste r will war n you about
the danger
<=>fig. 106:
- A red ve hicle is pic tured in the d is pla y.
- The text
DISTANCE! appea rs in the s ta tus
b ar.
- T he r ed indi cator lig ht
I blinks .
- In add it ion, a warning tone sounds.
Audi braking guard
Description
App lies to vehicles: wi th Audi ada ptive c ruise con tro l
Fig. 10 7 In str um ent clus ter: approach warnin g
Audi braking guard uses a radar sensor . It also
funct ions wit hin the lim its of the system
whe n adapt ive cruise control is switched off.
What can Audi braking guard do?
When detected in time, the system can assess
situations when a veh icle ahead brakes s ud
denly or if your own vehicle is t raveling at a
high speed and approac hing a ve hicle up
ahead that is movi ng mo re sl ow ly. Audi brak
ing guard does not react if it canno t detect
the si tua tion.
The system advis es yo u of various s ituations:
- The
distance wa rning is given if yo u are too
close to the vehicle ahead for a long time. If
the vehicle ahead bra kes sharply , yo u will
not be ab le to avoid a collision . The ind icator
light
I in the d isp lay comes o n.
- The
approach warning is given when a de
tected ve hicle up ahead i n your lane is mov
ing m uch mo re sl owly than you are or if i t
brake s sh arp ly. W hen t his war ning is g iven,
it may on ly be poss ible to avoi d a co llision
by swe rving or b ra kin g sharp ly. The indic ator
light
I a nd indic ator in t he di spl ay w ill war n
you abo ut the d ange r¢
fig . 107. You will a l
so hear an aco ustic s ignal.
If y o u do no t rea ct fas t eno ugh o r do not r eact
at all to the si tuat ion, A udi brak ing g uard w ill
i nt ervene by braking and the message
braking
guard intervention
w ill appea r. ~
Page 104 of 294

102 Audi adapti ve cruise control and br aking guard
- If a co llision is imminent, the system will
first provide an
acute warning by bri efly and
sharp ly app ly ing the brakes .
- If you do not react to the ac ute warning ,
braking guard can brake within the limits of
the system. This reduces the veh icle speed
in the event of a collis ion.
- At speeds under 20 mph (30 km/h), the sys
tem can in it iate a complete deceleration
s hortly before a collision .
1>.
- If the Audi braking guard senses that you
are not braking hard enough when a colli
sion is imminent, it can increase the braking
force .
Which functions can be contr oll ed ?
You can sw itch Audi braking g uard and the
distance/approach warning on or off in the ra
d io or MMI Qpage 102, Set tings in the ra
dio/MM!.
A WARNING
Lack of attention can cause col lisions, oth
er accidents and serious persona l injuries.
The Audi b raking guard is an assist system
and cannot prevent a collis ion by itself.
The driver must always intervene. The dr iv
er is always responsible for braking at the
correct time.
- Always pay close attention to traffic,
even when the Audi braking guard is
switched on. Be ready to intervene and
be ready to take comp lete control when
ever necessary. Always keep the safe and
legal distance between your vehicle and
vehicles up ahead .
- Audi braking guard works within limits
and w ill not respond outs ide the system
limits, for examp le when approaching a
stopped vehicle or stationary obstacle
(end of a traff ic jam or veh icle that has
broken down in traffic).
- Always remember that the radar s ensor
for the A udi braking guard works only
within defined detect ion and range limits
l ) Th is is not available in some c oun tries .
that may prevent the proper detection of
other veh icles.
- The radar sensor's function and range
can be reduced by rain, snow and heavy
spray. Moving veh icles up ahead may not
be prompt ly detected or may not be de
tected at all .
- Reflective surfaces including crash barri
ers or tunne l entrances may impair the
function of the radar sensor .
(D Tips
- You can cancel the braking that is in it iat
ed by the system by braking yourse lf, by
accelerating not iceably or by swerving .
- Audi braking guard error messages
Qpage 103.
- Keep in mind that brak ing guard can
brake unexpectedly. Always secure any
cargo or objects that you are transport
ing to reduce the risk of damage or in
jury .
Settings in the radio/MMI
Applies to vehicles: with Audi adaptive cruise control
., Sele ct: I CAR I func tion button > Car system s
contro l but ton > Driver a ssist> Audi brak
ing guard .
Or
., Select: !CAR ! function b utton > Aud i brak-
ing guard .
S ys tem -
Switch A udi braking guard On and
Off . When you switch the ignition on, the
message
Audi b raking guard off appears if
the system is switch ed off .
Ea rl y warnin g -The distance and approach
warnings in the display can be switched
O n/
Off .
(D Tips
-Yo ur settings are automatically stored
and assigned to the remote contro l key
being used at the times the settings are
made.