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Audi adaptive cruise control
Description
Applies to: vehicles with Audi adaptive cruise control
Fig . 8 9 Detectio n ra n ge
The adaptive cruise co ntro l system is a comb ina
tion of speed and d istance regula tion.
It assists
the dr iver by bot h regula ting the speed and
main taining a distance to the vehicle driving
ahead , within the limits of the system . If the sys
tem detects and object ahead, adaptive cruise
control can brake and acce lerate your vehicle.
This makes driving more comfortable both on long stretches of highway and in stop-and-go
traffic .
What can adaptive c rui se control do?
T he adaptive cruise contro l system uses video, ra
dar and ultrasound . Objects driving ahead can be
recogni zed up to 650 feet (200 m) away.
On open roads with no traffic, it functions like a
cru ise control system . T he stored speed is ma in
tained. When approaching an object ahead, the
adapt ive cruise control system automatically
brakes to match that object's speed and then
maintains the stored d istance. As soon as the
system does not detect a n object ahead, adaptive
cru ise con trol a cce lerates up to the stored speed .
In stop-and -go traff ic, adaptive cru ise control can
brake unt il the vehicle is s tat io nary and then be
g in d riving aga in under certai n conditions
¢ page 90.
Aud i braking guard can warn you about an im
pending col lision and in itiate braking maneuve rs
q page92 .
Assi st a nce systems
Which functions can be controlled?
When yo u switc h adap tive cr uise control on, you
can set the current speed as the "contro l speed"
¢ page 89, Switching on/off .
When driving, yo u can stop cru ise cont rol
¢ page 91 or ch ange t he speed ¢ page 90 at
any t ime .
Yo u can also se t the distance to the object mov
i ng ahead and set the d riving mode of the adap
t ive cr uise con trol ¢
page 91.
General information
Applies to: vehicles with Audi adaptive c ruise con trol
Fi g. 90 Fro nt o f th e ve hicle : se nsors and v ideo ca mera
T he areas that conta in the radar and ult rasonic
senso rs and the video came ra
¢ fig. 90 mus t not
be cove red by stickers, deposits or o ther objects
because th is can in terfere with the funct ion of
the adaptive cruise contro l system and braking
guard . For i nformation on clea ning, see
¢ page 228. The same applies for any modifica
tions made in the front area.
T he function of the adaptive cru ise control sys
tem and bra king g uard is limited under some
condit ions.
- Objects can on ly be detected when they are
w ith in the sensor range
¢ page 87 , fig . 89.
- The sys tem h as a limi ted abili ty to detect ob
jects that are a shor t distance ahead, off to the
side of your vehicle or mov ing into your lane.
- Ob jects that are difficult to detect such as mo
torcycles, vehicles with high g ro und clea rance
or an overhanging load are detected late or not
detected at all.
- When drivi ng through curves
¢ page 89 . .,.
87
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Assistance systems
-With stationary objects ¢ page 89.
A WARNING
Always pay attention to traffic when adaptive
cruise control is switched on and braking
guard is active. As the driver, you are still re
sponsible for starting and for maintaining
speed and distance to other objects. 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.
- 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 hydroplan
ing). Using the system under these condi
tions increases the risk of an accident.
- Switch adaptive cruise control off tempora
rily when driving in turning lanes, on ex
pressway exits or in construction zones. This
prevents the vehicle from accelerating to
the stored speed when in these situations .
- The adaptive cruise control system will not
brake by itself if you put your foot on the ac
celerator pedal. Doing so can override 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, ani
mals, objects crossing the road or oncoming
objects.
- The function of the radar sensors can be af
fected by reflective objects such as guard
rails, the entrance to a tunnel, heavy rain or
ice.
A WARNING
- Improper use of adaptive cruise control can
cause collisions, other accidents and serious
personal injury.
- Never let the comfort and convenience that
adaptive cruise control and braking guard
88
offer distract you from the need to be alert
to traffic conditions and the need to remain
in full control of your vehicle at all times,
- Always remember that the adaptive cruise
control and braking guard have limits -they
will not slow the vehicle down or maintain the set distance when you drive towards an
obstacle or something on or near the road
that is not moving, such as vehicles stopped
in a traffic jam, a stalled or disabled vehicle.
If registered by the radar sensors, vehicles
or obstacles that are not moving can trigger
a collision warning and if confirmed by the
video camera, an acute collision warning.
- Never follow a vehicle so closely that you
cannot stop your vehicle safely. The adap
tive cruise control cannot slow or brake the
vehicle safely when you follow another vehi cle too closely. Always remember that the
automatic braking function cannot bring the
vehicle to a sudden or emergency stop un
der these conditions .
- To prevent unintended operation, always
switch ACC off when it is not being used .
@ Note
The sensors 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 an authorized Audi dealer or authorized
Audi Service Facility check their function.
© Tips
For an explanation on conformity with the
FCC regulations in the United States and the
Industry Canada regulations, see
¢page 258.
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In curves
Applies to: ve hicles with Audi adaptive cruise co ntro l
Fig. 9 1 Example: dr iv ing into a curve
When driving into a curve ¢ fig. 91 and out of a
curve , the adaptive cruise control may react to an
object in the ne ighboring lane and apply the
b rakes. You can prevent that by p ressing the ac
celerator pedal b riefly.
Stationary objects
A pp lies to: ve hicles with Audi adaptive cruise contro l
Fig. 92 Example: object changi ng lanes and stationa ry ob
ject
The adaptive cruise contro l system only reacts to
objects that are mov ing or that th e system has
already detected as moving. For example, it can
react when a vehicle that has already been de
tected @turns or changes lanes, but adapt ive
cru ise control does not react to a stat ionary vehi
cle @.
Assi st a nce systems
Switching on/off
App lies to : vehicles wit h Audi ada ptive cr uise control
Fi g. 93 Operat ing lever : switch ing on and off
Fig . 94 Instrument clus te r: adaptive cru ise cont rol
You can set any speed between 20 mph (30 km/
h) and 95 mp h (150 km/h) .
Ind icator lights and messages in the instrument
cluster disp lay inform you about the current sit
uatio n and setting.
An additional indicator appears in the head-up display*.
Switching adaptive crui se control on
.,. Pull the lever towa rd yo u into pos ition (!)
¢ fig. 93. ACC: standby appears in the display .
Storing the speed and activating regulation
.,. To store the current speed, press the ISE TI but
ton ¢ fig. 93. The stored speed is show n in the
speedome ter in the LED line @and appears
briefly in the i nform ation
line @¢ fig. 94 .
... To activate the reg ulation while stationary, also
press the brake pedal.
Switching adaptive cruise control off
.,. Push the lever away from you into position @
until it cl icks in to p lace. The message
A CC: off
appears. ..,.
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Ass is tance sy stem s
@ Indicator light s
Ill -Adaptive cruise cont rol is switched on. No
objects a re detected ahead. The stored speed is
maintained.
• -An object ahead was detected. The adaptive
cruise control system regulates the speed and
distance to the object ahead and accelerates/
brakes automatica lly .
fai -Adaptive cruise control is switched on. An
object ahead was detected . Your vehicle rema ins
stopped and w ill not start driving automat ica lly.
• -The automatic braking is not enough to
maintain a suffic ient distance to a n object ahead.
You must intervene
¢ page 92, Request for
driver intervention.
© Instrument cluster display
I f adaptive cruise contro l is not shown in the in
strumen t cluster display, yo u can call it up using
the multifunction stee ring wheel b uttons
¢ page 20.
Based on the graphics in the d isp lay, you can de
termine if the system is ma inta ining a distance to
the object ahead and what that distance is.
No vehicl e -no object was detected ahead .
Whit e vehicle -an object was detected ahead.
Red veh icle -request for driver intervention
¢ page 92 .
Both
arrow s on the scale © indicate the distance
to the object ahead . No arrow appea rs when the
vehicle is on an open road and there is no obje ct
ahead. If an object is detected ahead, the arrow
moves on t he scale.
The green zone on the scale indicates the store
distance. For information on changing the dis
tance, refer to
¢ page 91. If the distance se
lected is exceeded or not reached, the arrow
moves into the red zone on the sca le.
A WARNING
If you press the ISE TI button when driving at
speeds below 20 mph (30 km/h), the vehicle
accelerates automat ically up to 20 mph (30
90
km/h), wh ich is the minimum speed that can
be set .
(D Tips
-If you switch the ign it ion or the adaptive
cruise control system off, the set speed is
erased for safety reasons .
- The electronic stabilization control (ESC) and the anti-slip-regulation (ASR) are auto
matically switched on when the adaptive
cruise control is switched on.
Changing the speed
Applies to: vehicles with Audi adapt ive cruise control
0
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Fig . 95 Operat ing lever: chang ing the speed
.,. To increase or reduce the speed in increme nts,
tap the lever up or down.
.,. To increase or decrease the speed qu ickly, hold
the lever up or down until the red LED @ reach
es the des ired
speed ¢ page 89 , fig. 94.
After each change, the new stored speed appears
briefly in the information
line¢ page 89, fig. 94
@ .
Driving in stop-and-go traffic
App lies to: vehicles with Aud i adapt ive cru ise control
The adaptive cru ise cont rol system also assists
you in stop-and-go traffic.
Stopping automatically
If
an object ahead stops, your vehicle will brake
and stay at a stop, within the limits of the sys
tem . The Start/Stop system* can be used as usu-
al. ..,.
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Driving manually
.,. Tap the accele rator pedal , o r
... pull the lever toward you into position @.
@ Tips
If an obstacle is detec ted when your veh icle
starts moving, the driver intervention request
appears
~ page 92. Your vehicle will drive
more slow ly when starting . This may also
happen in some situations when there is no
apparent obstacle.
Interrupting cruise control
App lies to: vehicles with Audi adaptive cruise contro l
Fig. 96 Sele ctor l eve r
Requirement: adaptive cruise contro l must be
sw itched on.
Overriding cruise control
.,. T o accelerate manually , p ull the lever toward
you into pos ition
@ and hold it there . T he mes
sage
ACC: over ride appears. Or
... Press the accelerator pedal.
... To resume c ru ise control, release the lever or
take your foot off the acce lerator pedal.
Canceling crui se control while dri ving
.,. Move the leve r into posit ion @. The message
ACC: standb y appears. Or
... Press the brake pedal.
... To resume the stored speed, move the lever in
to posit ion
@ .
Canceling cruise control when stopp ed
... Push the lever away from you into position @.
The message
ACC : standby appears.
A ssi st a nce systems
... To resume cru ise contro l, press the brake peda l
and pu ll the l ever toward you into pos ition @ .
A WARNING
It is dangerous to activate cruise control and
resume the stored speed when the current
road, traffic or weather cond itions do not per
mit this . This increases the risk of an accident .
Setting the distance
Applies to: vehicles with Audi adaptive cru ise control
F ig . 97 Operat ing lever: sett ing t he d ist ance
... T ap the switch to display the current set dis
tance ¢
fig. 97.
N (X) N 9 :I:
~
... To increase or reduce the d istance in incre
ments, tap the switch aga in to the r ight or left .
The distance between the two vehicles will change i n the inst rumen t cluste r display .
When approaching an object ahead , the adaptive
cruise contro l system brakes to match that speed
and then adjusts to the set d istance .
If the object
ahead accelerates, adaptive cruise contro l w ill al
so accelerate up to the stored speed .
The higher the speed, the greater the distance in
meters ¢.&. . The Distance 3 setting is recom
mended . That is equa l to the gene ral recommen
da tion of "half the speed shown on the speedom
eter" .
The distances provided a re specified values . De
pending on the driv ing s ituation and the way the
object ahead is dr iving, t he actual d istan ce may
be more or less tha n these ta rget distan ces .
The various symbo ls for the time increments ap
pears briefly in the info rmation line @
~ page 89, fig. 94 when you change the settings . .,.
91
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Ass is tance sy stem s
~-~ ---Di sta nce 1: this setting corresponds
to a distance of 92 ft (28 m) when traveling at 62
mph (100 km/h), for example (time between: 1
second) .
~-- ~--Di stan ce 2: this setting corresponds
to a distance of 118 ft (36 m) wh en traveling at
62 mph (100 km/h), for example (time between:
1.3 seconds) .
~--- ~-Distance 3: this setting corresponds
to a distance of 164 ft (SO m) when traveling at
62 mph (100 km/h), for example (time between:
1.8 seconds) .
~--- -~ Distance 4 : This setting corresponds
to a distance of 210 ft (64 m) when traveling at
62 mph (100 km/h), (time d istance of 2.3 sec
onds) .
A WARNING
Following other vehicles too closely increases
the risk of collisions and ser ious personal in
jury .
- Setting short distances to the traffic ahead
reduces the time and distance available to
br ing your vehicle to a safe stop and makes
it eve n mo re necessary to pay close atten
t ion to traffic.
- Always obey applicable traffic laws, use
good judgment, and select a safe following
distance fo r the traffic, road and weather
cond itio ns.
(D Tips
-Distance 3 is set automatically each time
you switch the ignit ion on.
-Your settings are automatically stored and
assigned to the remote control key being
used.
Selecting the driving mode
Applies to: vehicles with Audi adaptive cruise control
.. Se lect the des ired driving mode in dr ive se lect
q poge 105 .
92
@ Tips
Your settings are automatically stored and as
signed to the remote contro l key being used.
Request for driver intervention
Applies to: vehicles with Audi adaptive cruise control
Fig . 98 Ins trumen t cluster : request for dri ver in te rven tion
In certain situations, the system will request you
to take action :
-If the braking from the adaptive cru ise control
system is not eno ugh to ma inta in eno ugh dis
tance to the object ahead .
The danger is indicated by
the . indicato r light
q fig. 98. An aud io signa l will also so und.
- Press the brake pedal to slow your vehicle down .
Audi braking guard
Applies to: vehicles with Audi adaptive cruise control
Fig. 99 Instrumen t cl uster : approac h warn in g
The braking guard uses radar sensors and a v ideo
camera .
It also functions within the limits of the
system when adaptive cru ise control is switched
~ ~
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What can the braking guard do?
When detected in time, the system can assess
dangerous sit uat ions where an object a head
brakes suddenly or if your own vehicle is traveling
at a high speed and approaching an object that is
mov ing more slowly. The brak ing guard does not
react if it cannot detect the situation.
The system advises you of various dangero us sit
uations :
- T he
distan ce warning occurs if you d rive too
closely to the object ahead for a long period o f
time . If the object ahead brakes strongly, you
would not be able to avoid a collision .
The.
indicator light appears as an indication for th is.
- The
app roach wa rning occurs when an object
ahead is traveling more s low ly or brakes
strongly. When th is warning occurs, it may on ly
be poss ible to avoid a co llision by swerving or
braking strongly . The danger is indicated by the
• ind icator light ~ fig . 99 . An aud io signal w ill
also sound .
If you do not react early enough or at a ll to a dan
ge rous situation, the braking guard suppo rts you
w ith a brak ing intervent ion .
- If a co llision is imminent, the system will first
provide an
ac ute warning by braking sharply.
- If you do not react to the acute warning, the braking guard can increase the braking force
within the limits of the system
ll . Th is reduces
the veh icle speed in the event of a collision .
- The system can init iate comp lete decelerat ion
shortly before a collision
l l. Full deceleration at
high speeds occurs only in vehicles with adap
t ive cru ise control and s ide ass ist (pre sense
plus).
- If the braking gua rd determines that you are
not brak ing st rongly eno ugh whe n there is an
i mpending co llision, i t can increase the brak ing
fo rce .
- T he pre se nse functions also engage whe n
the re is an impend ing
collision ~ page 95.
ll This is not availa ble in so me co untrie s.
A ss istance systems
Which functions can be controlled?
Yo u can swit ch t he b raking guard and t he d is
tance/approach warning on or
off in the Infotain
ment system
~ page 94, Settings in the Info
tainment system .
A WARNING
--
Lack of attention can cause collisions, other
accidents and ser ious personal inj uries. The
braking guard is a n assist system and cannot
pr event a collision by itself . T he dr iver m ust
a lways inte rvene . The d river is always respon
s ib le for b raking at the co rrect t ime.
- Always pay close atten tion to traffic, even
when the b raking gua rd is switched on. Be
ready to in tervene and be rea dy to take
comp le te co ntro l wheneve r ne cess ary. A l
ways keep the sa fe and legal distance be
tween your vehi cle a nd ve hicl es up ahead .
- B raki ng g uard works w it hi n limi ts a nd will
not respond o uts ide the system limits, fo r
examp le when approach ing 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 brak ing 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.
Mov ing vehicles up ahead may not be
promptly de tected or may no t be detected
at a ll.
- Reflective surfaces includi ng crash ba rriers
or tunne l entra nces may impair the function
of t he ra da r se nso r.
(D Tips
- You can cancel the braking with increas ing
force tha t is initiated by t he sys tem by brak
ing yourse lf, by acce le ra ting not iceably or
by swe rving.
- Keep in mind that b raking gua rd can b rake
unexpectedly. A lways secure a ny cargo or
93
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Assistance systems
objects that you are transporting to reduce
the risk of damage or injury.
Settings in the Infotainment system
A pp lies to: ve hicles w ith Audi a daptive cruise co ntro l
~ Se lect : the ICARI function button > (Car)* Sys
tems
control button > Driver assistance > Audi
braking guard .
System -
switch the brak ing guard On /Off. When
you switch the ign ition on, the message
Braking
guard: Off
appears if the system is switched off.
Early warning -the distance and approach warn
ings in the display can be sw itched
On /Off .
(D Tips
-Your settings are automatically stored and
assigned to the remote control key being
u sed .
-If you restrict or switch off the ESC, the
braking guard also switches itse lf off
c;, page 121.
-Switch braking guard off when you are load
in g t he ve hicle onto a vehicle ca rr ier, t rain,
sh ip or other type of transportation. This
ca n prevent undesired warnings from the
braking guard system.
Messages
App lies to: ve hicles w ith Audi a daptive cruise co ntro l
Braking guard: Off
This message appears if the system is switched
off throug h the I nfota inment system . Otherwise,
if the system is turned off, the information ap
pears every time shortly after the start of the
trip.
The message also appears if the system is not
ava ilable due to a malfunct ion or if the ESC is
sw itched off
c:;, page 121 . If this is the case, the
system w ill not prov ide warnings about a possi
b le co ll ision.
Braking guard: engaged
This message appears if a sharp brake pressure
was applied due to an acute warning.
94
ACC : Unavailable!
ACC and Audi braking guard: Unavailable
The system cannot guarantee that it will detect objects correctly and is sw itched off. The sensors
have been moved or are faulty . The pre sense
functions may also be affected . Drive to an au
thorized Audi dea le r or aut horized Audi Service
Facility immediately to have the malfunction cor
rected.
ACC: Currently unavailable. No sensor vision
ACC and Audi braking guard: Currently unavail
able. No sensor vision
This message appears if the sensor v iew is ob
structed, for examp le by leaves, snow, heavy
spray or dirt . Clean the sensors
c:;, page 87,
fig . 90 .
ACC : Currently unavailable. Gradient too steep
The road exceeds the maxim um possible angle
for safe adaptive cruise control operation. Adap
tive cruise control is switched off.
ACC : Only available in D, Sor M
Select the D/S or M selector lever position.
ACC: Currently unavailable. Parking brake ap
plied
The adaptive cruise control system switches off
automat ica lly if the parking brake is set.
ACC : Currently unavailable. Stability control
(ESC) input.
This message appears if the electro nic stabiliza
tion control (ESC) is taking action to stab ilize the
vehicle. In th is case, adaptive cruise control
switches off automatically.
ACC off: Manual control!
This message appears when adaptive cruise con
trol cannot set the parking brake. Press the brake
pedal to prevent the vehicle from ro llin g.
• ••
Three white dots appear if a setting cannot be se
l ected w ith the operating lever. For example, this
happens if adaptive cru ise control cannot start
driv ing automat ically in stop-and-go traff ic