2018 AUDI A8 cruise control

Assistance systems
-With stationary objects ¢ page 97.
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
96
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 339.

lL t:0 ....
"' ......
"' .... 0 0 :c ' In curves
Applies to: ve hicles with Audi adaptive cruise co ntro l
Fig. 105 Examp le: d riving into a curve
When driving into a curve <=> fig. 105 and out of a
curve, the adaptive cru ise control may react to an
object in the ne ighboring lane and apply the
b rakes. You can prevent that by pressing the ac­
celerator pedal b riefly.
Stationary objects
A pp lies to: ve hicles with Audi adaptive cruise contro l
Fig. 1 06 Examp le : object chang ing lanes a nd stat iona ry
object
The adaptive cruise contro l system only reacts to
objects that are mov ing or that t he 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. 107 Ope rat ing lever: switch ing on and off
Fig . 108 In strume nt clus te r: adaptive cru ise control
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. 107. ACC: standb y appears in the d is ­
p lay.
Storing the speed and activating regulat ion
.,. To store the current speed, press the ISET I but­
ton<=> fig. 107. T he sto red speed is shown in t he
speedome ter in the LED line @and appears
briefly in the info rmation
line @<=> fig. 108 .
... To act ivate the regulation wh ile stationary, also
press the brake pedal.
.,.
97

Ass is tance sy stem s
Switch ing adaptive cruise control off
.,. Push the lever away from you into position @
until it clicks into place . The message
ACC: off
appears.
@ Indicator lights
It -adaptive cruise cont rol is switched on . No
objects a re detected ahead . T he stored speed is
main tained.
• -an object ahead was detected. The adaptive
cru ise control system regulates the speed and
d istance to the object ahead a nd accelerates/
b rakes a utomatically .
(ii-adaptive cruise control is switched on . An
object ahead was detec ted . Your vehicle rema ins
stopped and w ill not start dr iv ing a utomat ically .
•-The automatic braking is no t enough to
maintain a sufficient distance to an object ahead .
You must
i nte rvene ~ page 100, Driver interven­
tion request.
© Instrument cluster display
If adaptive cruise control is not shown in the in ­
strument cluster display, you can call it up usi ng
the multifunction stee ring wheel b uttons
~ page 12.
Based on the graphics in the d isplay, 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.
White vehicle -an ob ject was detected ahead.
Red vehicle -request for driver intervention
~ page 100 .
Both arrow s on the scale © indicate the distance
to the object ahead. No arrow appea rs when the
ve hicl e is o n an open road and there is no obje ct
ahead. If an object is de tected ahead, the arrow
moves on the scale.
The green zo ne on the scale indicates the sto re
d istance. For information o n chang ing the d is­
tance, refer to
Q page 99 . If the distan ce se­
lected is exceeded or not reached, the a rrow
moves into the red zone on the sca le .
98
A WARNING
If you press the !SET ! button when driving at
speeds below 20 mph (30 km/h), the veh icle
accelerates automatically up to 20 mph (30
km/h), wh ich is the minim um speed that can
be set .
(D Tips
-If you switch the ign it ion or the adaptive
cruise control sys tem off, the set speed is
erased fo r safety reasons .
-The electronic stabilization control (ESC)
and the an ti-slip-regulat ion (ASR) are auto­
matically switc hed on when the adaptive
cruise cont rol is swi tched on.
Changing the speed
Applies to: vehicles with Audi adaptive cruise control
0
f
•
0
Fig. 10 9 Operat ing leve r: ch ang ing the speed
.,. To increase or reduce the speed in increments,
ta p the lever up or down .
.,. To increase or decrease t he speed q uickly, hold
t he lever up o r down un til the red LED @ reac h­
es the desired
speed ~ page 97, fig. 108 .
After each change, the new stored speed appea rs
briefly in the information
li ne @ ~ page 97,
fig . 108 .
Driving in stop-and-go traffic
Applies to: vehicles with Audi adaptive cruise control
The adapt ive cru ise control system also assists
you in stop-and-go traffic . If an object ahead
stops, your vehicle will brake and stay at a stop,
within the limits of the system.
..

lL t:0 ....
"' ......
"' .... 0 0 :c ' • To resume driving with adaptive cr uise control,
tap the accelerator peda l or
• P ull the lever toward you into position @
Qpage 99 , fig. 110 .
@ Tips
If an obstacle is detected when your vehicle
starts moving, the driver intervention request
appears
Q page 100. Your veh icle w ill drive
more s low ly when start ing . This may also
happen in some situations when there is no
apparent obstacle.
Interrupting cruise control
App lies to: veh icles with Audi adaptive cruise contro l
Fig. 1 10 Se lecto r leve r
Requiremen t: adaptive cruise control mus t be
switched on .
Overriding c rui se control
• To accelerate manually, pull the lever toward
you into pos ition @and ho ld it there . The mes­
sage
A CC: over rid e appears. O r
• Press the a ccelerator pedal.
• T o resume cru ise control, release the lever or
take your foot off the acce lerator pedal.
Canceling cruise 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 posit ion
@ .
Canceling crui se control when stopped
• Push the lever away from you into position @.
The message
A CC: standby appears .
A ssi st a nce systems
• To resume cruise contro l, press the brake peda l
and pu ll the lever toward you into position @.
A WARNING
It is dangerous to activate cruise control and
resume the stored speed when the current
r oad, traffic or weather cond itions do not per­
mit this . This increases the risk of an accident .
Setting the distance
Applies to: vehicles with Aud i adaptive cru ise control
F ig . 11 1 Operat ing leve r: sett ing th e d is tan ce
• Tap the switch to display the current set d is­
tance
Q fig . 111.
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
c ruise contro l system brakes to match that speed
and then adjusts to the set d istance .
If the object
ahead accelerates, adaptive cruise co ntro l w ill al­
so accele rate up to the stored speed.
The higher the speed, the g reater the distance
Q ,& . The Distance 3 sett ing is recommended .
T hat is eq ual to the gene ral recommendation of
" ha lf the speed shown on the speedometer ".
The distances provided are spec ified values. De­
pending on the driv ing s ituation and the way the
obje ct ahead is dr iv ing, the actual d istance may
be more or less th an these ta rge t distances.
The various symbo ls for the time inc remen ts ap­
pears briefly in the info rmation line @
Q page 97, fig. 108 when you change the set-
t ings.
.,.
99

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) when 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
¢ page 111 .
100
@ Tips
Your settings are automatically stored and as­
signed to the remote contro l key being used.
Driver intervention request
Applies to: vehicles with Audi adaptive cruise control
Fig . 112 Instrument cluster : request for driver interven·
t ion
In certain situations, the system will request you
to take action:
- If the braking from the adaptive cru ise control
system is not enough to ma inta in enough dis­
tance to the object ahead.
The danger is indicated by
the . indicator light
¢fig. 112. An audio signal will also sound.
- Press the brake peda l to slow yo ur vehicle
down .
Audi braking guard
Applies to: vehicles with Aud i adaptive cruise control
F ig . 113 In strume nt cl us ter: approach warning
The brak ing guard uses radar sensors and a video
camera .
It also functions within the limits of the
system when adaptive cru ise cont rol is switched
off.
IIJ,,

Ass is tanc e system s
- Keep in mind that braking guard can brake
unexpected ly. Always secure any cargo or
objects that you are transport ing to reduce
the r isk of damage or in jury.
Settings in the Infotainment system
Applies to: vehicles with Audi adaptive cruise control
.,. Select : the ICARI function button > Ca r sy stems
control button > Dri ver a ssistan ce > Audi bra k­
ing guard .
Sy stem
-switches the brak ing guard On /Off .
When you switch the ignition on, the message
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 .
(D Tips
- Your settings are automatically stored and
assigned to the remote control key being used.
- If you restrict or sw itch off the ESC, the
braking guard also switches itse lf off
c> page 128.
-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 gua rd system.
Messages
Applies to: vehicles with Audi adaptive cruise control
Braking guard : Off
This message appears if the system is sw itc hed
off throug h the Infota inment system . Otherwise ,
if the system is tur ned off, the information ap­
pea rs every time shortly after the start of t he
trip .
The message also appears if the system is not
ava ilable d ue to a ma lfunct ion or if the ESC is
sw itched
off ¢ page 128 . If this is the case, the
system wi ll not provide warnings about a possi ­
b le co llision.
Braking guard : engaged
102
This message appears if a sharp brake pressure
was applied due to an acute warning .
ACC: Unavailable!
ACC and Audi braking guard: Una vailable
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
funct ions may also be affected . Drive to an au­
t h orized Aud i dea ler or authorized Audi Se rvice
Fac il ity immed iate ly to have the ma lfunction cor­
r ec ted .
ACC : Currently unavailable . No sen sor vis ion
AC C and Audi braking gua rd: Curr entl y una vail­
able. No sensor vision
This message appears if the sensor view is ob­
structed, for examp le by leaves, snow, heavy
spray or dirt. Clean the
sensors ¢ page 95,
fig. 104.
ACC : Cu rrently un avail able . G radient too steep
The road exceeds the maxim um poss ible a ngle
fo r safe adaptive cruise co ntro l opera tion. Ada pa
tive cru ise con trol is switched off.
ACC : Only available in D , Sor M
Se lect the D, Sor M selector lever position .
ACC: Cu rrently un available . Parking br ake ap­
plied
The adaptive cru ise con trol system sw itches o ff
automatica lly if the parking brake is set .
ACC: Currently unavailabl e. Stability contr ol
( ES C) inpu t.
This message appears if the electron ic stabiliza­
tion cont rol ( ESC) is tak ing action to stabilize the
vehicle. In t his case, adaptive c ruise cont ro l
swi tches off autom atically.
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 rolling .
... ~

u. co .... N
" N .... 0 0 :c ' Three white dots appear if a se tting cannot be se ­
l ected with the operating lever. For examp le, this
h appens if adaptive cruise contro l cannot start
driving automatically in stop-and-go traffic be­
cause the driver has not fastened their safety belt .
Door open
The adap tive c ruise co ntro l system cannot sw itch
on w hen a door is open.
Stationary object ah ead
This message appears if you would like to switc h
adapt ive cruise control on and there is a station­
ary object o r obstacle directly ahead of you r vehi­
cle .
Audi active lane assist
(lane departure assist)
Description
Applies to: vehicles with Audi active lane assist
Active lane ass ist detects lane marker lines with­
in the limits of the system us ing a came ra in t he
w indsh ie ld. If you are app roaching a de tected
l ane marker line and it appea rs likely t hat you
will leave the lane, the system wi ll warn you with
corrective steering. Yo u can override t his steering
at any time . If you pass over a line, the steer ing
wheel will v ibrate lightly. In order for this warn­
i n g vibration to occur, it must f irst be sw itched
on in the Infotainment system . Active lane assist
i s ready for operation whe n the lane marke r line
i s detected on at least one s ide of the vehicle .
The system is designed for driv ing on express­
ways and highways and therefore only activates
at speeds above approximate ly 40 mph (65 km/
h).
Applies to vehicles with side assist
If you activate a tur n signa l when active lane as­
sist is ready and it class ifies a la ne cha nge as cr it­
i cal because of ve hicles t raveli ng a longs ide you o r
approaching you, the re w ill be not iceab le correc­
tive stee rin g short ly before you leave t he lane.
This will attempt to keep yo ur vehicle in t he lane.
A ss istance systems
Applies to vehicles w it h out side assist
T he system wi ll not warn yo u before c ross ing a
l ane marker line if you have activated the t urn
s ignal. In this case, it assumes that you are
changing lanes intentionally.
Appl ies to: vehicles with adaptive c ruise control
The co rrective steer ing is targeted based o n the
dr iv ing s itu ation . In add it ion to the lane mar ker
li nes, the system can al so t ake into accoun t other
objects s uch as gua rd rai ls. If they a re detected in
close proximity to t he vehicle, active lane assist
helps p reve nt the vehicle from driving too close
to them. The re is a lso pass ing ass istance. The
system does not provide any corrective steering if it detects that you are pass ing anot her vehicle .
A WARNING
-
-The system warns the drive r that the vehicle
is leaving the lane using corrective steering.
T he drive r is always responsible fo r keeping
the vehicle within the lane.
- T he system can assist the dr iver in keeping
the vehicle in the l ane, but it does not dr ive
by i tsel f. Always keep your hands on the
s teer ing whee l.
- Cor rec tive stee ring may not occur in cert ain
situa tions, such as during he avy b raking .
- T here may be cases whe re t he came ra does
not recogni ze all lane mar ker lines . Cor re c­
tive steering can only take pla ce on the s ide
of the vehicle where lane marker lines are
detected.
- Other road structu res or objects could poss i­
b ly be identified un intentionally as lane
marker lines. As a result, co rrective steering
may be unexpected or may not occ ur.
- The camera view can be rest ricted, for ex­
ample by vehicles driving ahead or by ra in,
snow, heavy spray or light shining into the
camera. Th is can result in active lane ass ist
not detecting the lane marker lines o r de­
tect ing them inco rrectly .
- Unde r ce rtain condit ions such as r uts in the
road, a ban ked roadway or crosswinds, the
correct ive steer ing alone may not be enough
to keep the vehicle in the middle of the lane.
~
103

Ass is tanc e system s
In the sporty dynamic mode, the transmission
shifts at higher speed ranges.
Air su spen sion
The adaptive air suspension/adaptive air suspen­
sion spo rt* is an e lectron ica lly contro lled a ir sus ­
pens ion and damping system . The adjustment
depends on the driving mode selected, steering movements, the driver's braking and accelera­
tion , and as the road surface, vehicle speed and
load . A sporty sett ing is generally used in vehicles
with adap tive a ir suspension sport*.
The vehicle ground clearance depends on the mode se lected and the speed . When you are in
the auto or dynamic mode, the h ighway sett ing is
activated when you dr ive above 75 mph (120 km/
h) for more than 30 seconds . The ground clear­
ance is increased automatically if the speed
drops below 44 mph (70 km/h) for more than 120 seconds .
Stee ring
The power steer ing adap ts . Indirect steer ing that
moves easily as in comfort mode is especially
suited to long drives on a h ighway . The dynam ic
mode p rovides spo rty , d irect steering.
Applies to: vehicles with dynamic steering
The steering ratio changes based on vehicle
speed in order to ma intain optimum steering ef­
fort for the dr ive r at all times . This sets the steer­
i n g to be less sensit ive at hig he r speeds in o rder
to p rovide imp roved vehicle contro l. At reduced
speeds, steer ing is more direct in order to keep
the steering effort as minima l as possib le when
the driv er is maneuvering the v ehicl e. At low and
average speeds, dynamic steering* addit ionally
provides more responsive steering performance.
Sport diff ere ntial *
As a component of the all wheel drive system (quattro)
¢ page 131, the sport differential dis ­
tributes the driving power to the rear axle de ­
pending on the situation. The distribution of
power va ries from balanced (comfort) to sporty
(dynamic) depending on the selec ted mode . The
goal is a high level of agility and ab il ity to accel ­
erate on curves . The ve hicle is very respons ive to
steer ing .
112 Corn
ering light *
The co rnering ligh t adapts the hig h beams to the
direction of the curve depending on the speed.
The pivoting action and the lighting also adapt to
the mode.
Adaptive cruise cont rol*
The be hav io r whe n accelerat ing ca n be adjusted
from comfortable to sporty, depending on the drive select mode. Adaptive cruise control also
responds to the driving behavior of the vehicle
ahead in a more cons ervative or sporty manner.
Engine sound *
The eng ine sound adapts to the c urrent mode
and can be subtle to spo rty.
{[» Note
- Make s ure there is enough clearance above
and be low the vehicle when pa rk ing . T he
heig ht of t he ve hicle can change on ce it is
parked d ue to temperature fluctuations,
changes to the load conditions and changes
to the driv ing modes, which can affect clear­
ance .
- When transporting the vehicle on a car car ­
rier, train, ship or by other means, on ly tie
the vehicle down at the runn ing surface of
the tires, which is the outer c ircumference.
Securing the vehicle at the axle compo­
nents, suspens ion struts o r tow ing eyes is
not pe rm itted because the p ressure i n the
air suspe nsion s truts ca n change d uring
t ra nspo rt. The vehi cle may not be secu red
sufficiently i f th i s happens.
(D Tips
- In some mo dels, the max imum ve hicle
speed can only be reached in t he auto and
dynamic modes.
- Th e S se lector lever posi tion a utomat ic all y
engages if the dynami c mode is selected.
- In ve hicl es tha t h ave dynam ic stee rin g*, op ­
erat ing no ise is he ard when sta rting o r stop ­
ping the engine . This does no t indi ca te a
prob lem.