2017 AUDI A8 Owners Manual

C) C0 ....
"' " "' .... 0 0 :r - With stationary objects ~ page 96.
A WARNING
Always pay attention to traffic when adapt ive
cruise control is switched on and braking
guard is active . As the dr iver, you are still re­
sponsible for starting and for maintaining
speed and d istance to other objects. Braking
guard is used to assist you . The driver must
always take action to avoid a collision . The
driver is always responsib le for brak ing at the
co rrect time .
- For safety reasons, do not use adapt ive
cruise co ntro l when driv ing on ro ads w ith
many curves, when the road su rface is in
poor condit ion and/or in bad weather (s uch
as ice, fog, grave l, heavy rain and hydrop la n­
ing). Using the system under these condi­
t ions increases the risk of an accident.
- Switch adaptive cruise contro l 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 adapt ive cru ise control system will not
brake by itself if you put your foot on the ac­
celerator pedal. Doing so can overr ide the
speed and distance regulation .
- When approaching stat ionary objects such
as stopped traffic, adapt ive cru ise control
will not respo nd and braking gua rd will have
l imited func tion .
- The adapt ive cru ise control system and
bra king g uard do not react to people, ani­
mals, objects crossing the road or oncom ing
objects.
- T he function of the radar sensors can be af­
fec ted by reflec tive objects s uch as guard
rai ls, the ent rance to a tunnel, heavy rain or
ice.
& WARNING
- Improper use of adaptive cruise control can cause collisions, other accidents and serious
persona l injury.
- Never let the comfort and convenience that
adaptive cruise cont rol and braking guard
A ss ist
offe r dist ract you from the need to be alert
to traffic cond itions 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 dr ive towa rds an
obstacle or something on or near the road
that is not moving, s uch as vehicles stopped
in a t raff ic jam, a stalled or disab led vehicle.
If r eg istered by the radar sensors, vehicles
or obsta cles that are not moving ca n trigger
a co llision wa rning and if confirmed by the
video came ra, an acute co llision wa rning .
- Never fo llow a vehicle so closely that you
cannot stop your vehicle safely . The adap­
tive cruise contro l cannot slow or brake the
veh icle safely w hen you follow another vehi­
cle too closely. A lways remember that the
automatic braking function cannot bring the
veh icle to a sudde n or emergency stop u n­
der these conditions .
- To prevent unintended operat ion , always
sw itch ACC off when it is not being used .
(D Note
The sensors can be d isplaced by impacts or
damage to the bumper, wheel housing and
underbody. That could affect the adaptive
cruise contro l system and braking gua rd .
Have an au thorized Audi dealer o r autho rized
A udi Service Fac ility check the ir funct ion.
In curves
Applies to: vehicles wit h Aud i ada ptive cru ise control
I
F ig. 105 Example: d rivin g i nto a c urve
95

Ass is t
When driving into a curve ¢ fig. 105 and out of a
curve, the adaptive cruise control may react to an
object in the neighbor ing lane and apply the
brakes. You can prevent that by pressing the ac­
celerator pedal brief ly .
Stationary objects
App lies to: vehicles with Audi adaptive cruise contro l
Fig . 1 06 Example: ob ject c hangin g lanes and stat ionary
object
The adaptive cruise contro l system only reacts to
objects that are mov ing or that the system has
a lready detected as movi ng. For examp le, it can
react when a vehicle that has a lready been de ­
tected @turns or changes lanes, but adaptive
cru ise control does not react to a stat ionary vehi ­
cle @.
Switching on /off
Applies to: vehicles with Audi adaptive cruise control
Fig. 1 07 Opera ting lev er: sw itch ing on a nd o ff
96
Fig. 108 In strument cl uste r: adapt ive c ruise control
You can set any speed between 20 mph (30 km/
h) a nd 95 mph ( 150 km/h).
Ind icator lights and messages in the instrument
cluster display inform you about the current sit­
uat ion and setting .
An additional indicator appears in the Head-up display* .
Switching adapti ve cruise contr ol on
.,. Pull the lever toward you into position (D
¢ fig. 107 . ACC: standby appears in the dis­
play .
Saving the speed and acti vating regulation
.,. To save the current speed, press the ISETI
¢ fig . 107 button. The sto red speed is shown in
the speedomete r in the LED line @and appears
briefly in the information line@¢
fig. 108 .
.,. To act ivate the regulation w hile stationary, also
press the brake pedal.
Switching adaptiv e cruise contr ol off
.,. Push the lever away from you into position @
until it cl icks into place . The message ACC : off
appears .
@ Indicator lights
II-adap tive c ruise control is switched on. No
ob jects are detected ahead . The stored speed is
maintained.
• -An object ahead w as de tected . The adaptive
cruise contro l sys tem regu lates the speed and
distance to the object ahead and accelerates/
brakes automatically .
IJ>

C) C0 ....
"' " "' .... 0 0 :r tij-adaptive cruise control is switched on. An
object ahead was detected. Your vehicle remains
stopped and will not start dr iv ing automat ically.
• -T he automatic braking is not enough to
maintain a sufficient distance to an object ahead.
You must intervene
c:> page 99, Driver interven­
tion request .
© Instrument clu ster di spla y
If adaptive cruise control is not shown in the in­
strument cluster display, yo u can call it up using
the mu ltifunction stee ring wheel buttons
<=:> 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 v ehi cle -No object ahead was detected.
Whit e ve hicle -An object ahead was detected .
Red vehicl e -Request for driver intervention
c:>page 99.
Both arrows on the s cale © indicate the distance
to the object 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.
The green zone on the scale indicates the store
distance. For information on changing the dis­
tance, refer to
c:> page 98. If the distance se­
lected is exceeded or not reached, the arrow
moves into the red zone on the scale.
A WARNING
~=-:---
If you press the ISETI b utton when driving at
speeds be low 20 mph (30 km/h), the vehicle
accelerates automatica lly up to 20 mph (30
km/h), which is the m in imum speed that can
be set .
(D Tips
-If you switch the ignition o r the adapt ive
cruise contro l system off, the set speed is
erased for safety reasons.
- The elect ronic stab ilization cont rol (ESC)
and the a nti -slip-reg ulation (ASR) a re au to-
A ss ist
matically switched on when the adaptive
cruise control is switched on .
Changing the speed
Applies to: vehicles with Audi adaptive cruise control
0
f
•
0
Fig . 1 09 Operat ing lever : c h an gi ng the speed
co N 0 :i: ~ m
.. To increase or reduce the speed in increments,
ta p the lever up or down .
.. To increase or decrease the speed quickly,
h o ld
the lever up or down until the red LED@reach­
es the desired speed
c:> page 96, fig. 108.
After each change, the new stored speed appears
briefly in the information line@
c:> page 96,
fig. 108.
Driving in stop-and-go traffic
Applies to: vehicles with Audi adaptive cruise control
The adaptive cruise control system also assists
you in stop-and-go traffic . If an ob ject ahead
stops, your vehicle will brake and stay at a stop,
within the limits of the system.
.. To resume driving with adaptive cruise control,
tap the accelerator pedal or
.,. Pull the lever toward you into pos ition @
c:> page 98, fig . 110 .
a) Tips
If an obstacle is detected when your vehicle
starts moving, the dr iver intervent ion request
appears
c:> page 99. Your vehicle will drive
more slowly when starting. This may a lso
happen in some si tuatio ns when the re is no
apparent obstacle .
97

Assist Interrupting cruise control
Applies to: vehicles with Audi adaptive cruise contro l
Fig. 110 Selector leve r
Requirement: adaptive cruise control mus t be
sw itched on .
Overriding cruise control
• To accelerate manually , pull the lever toward
you into position @and hold it there . T he mes­
sage
ACC: override appears . Or
• press the accelera tor pedal.
• To resume cruise control , release the lever or
take your foot off the accelerator pedal.
Canceling cruise control while driving
• Move the lever into position @. The message
ACC: standby appears . Or
• press the brake pedal.
• To resume the stored speed, move the lever in ­
to posit ion @.
Canceling cruise control when stopped
• Push the lever away from you into position @.
The message
ACC : standby appears.
• To resume cruise control, press the brake pedal
and pull the lever toward you into position @.
.&, WARNING
It is dangerous to activate cruise control and
resume the stored speed when the current
road, traffic or weather conditions do not per­
mit this. This increases the risk of an accident.
98
Setting the distance
Applies to: vehicles with Audi adaptive cruise control
Fig. 111 Ope rating leve r: sett ing th e dis tan ce
• Tap the switch to display the current set dis­
tance
¢ fig . 111 .
• To increase or reduce the distance in incre­
ments, tap the switch again to the right or left .
The distance between the two veh icles will
change in the instrument cluster display .
When approaching an object ahead, the adaptive
cruise contro l system brakes to match that speed
and then adjusts to the set distance.
If the object
ahead accelerates, adaptive cruise control will al­
so accelerate up to the stored speed .
The higher the speed, the greater the distance
¢ ,&. .The
Distance 3 setting is recommended .
That is equal to the general recommendation of
"half the speed shown on the speedometer".
The distances provided are spec ified values . De ­
pending on the driving situation and the way the
object ahead is dr iving, the actual distance may
be more or less than these target distances .
The var ious symbo ls for the time increments ap­
pears briefly in the information line @
¢
page 96 , fig . 108 when you change the set­
tings .
c::::,_c::::, ___ Distance 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) .
c::::, __ c::::, __ Distance 2: this setting cor responds
to a distance of 118 ft (36 m) when traveling at
62 mph (100 km/h) , for example (time between:
1.3 seconds) . ""

C) C0 ....
"' " "' .... 0 0 :r ~-- -~ -Di st a nce 3: this setting corresponds
to a distance of 164
ft (SO m) when traveling at
62 mph (100 km/h), for examp le (time between :
1.8 seconds).
~-- --~ Dist a nce 4: This setting corresponds
to a distance of 210
ft (64 m) when traveling at
62 mph (100 km/h), (time distance of 2.3 sec­
onds).
A WARNING
Following other vehicles too closely increases
the risk of coll isions and ser ious personal in ­
jury.
- Setting short distances to the traffic ahead
reduces the t ime and distance available to
br ing your vehicle to a safe stop and makes
it even mo re necessary to pay close atten­
t ion to traffic.
- Always obey applicable traffic laws, use
good j udgment, and select a safe following
distance for the traffic, road and weather
condit ions .
@ Tips
- Di stance 3
is set automatically each time
you switch the ignition on.
- Your settings are automatically stored and
assigned to the remote control key being
used.
Selecting the driving mode
A pp lies to: ve hicles with Audi adaptive cruise co ntrol
.,. Se lect the des ired driving mode in dr ive se lect
c> page 110 .
@ Tips
Your se ttings a re au toma tical ly s to red and as­
signed to the remote control key being used.
A ss ist
Driver intervention request
App lies to : vehicles wit h Aud i ada ptive cr uise control
Fig. 112 Instrume nt cl uster : request fo r drive r in terven ­
tio n
In certain situa tions, the system will request you
to take action:
- if the braking from the adap tive cruise contro l
system is not enough to ma intain eno ugh dis­
t ance to the object ahead.
The da nger is indicated by the. indicator light
r:!> fig . 112. An audio signal will a lso sound .
- Press the brake pedal to slow your vehicle
down.
Audi braking guard
Appl ies to: vehicles wit h Audi ada ptive cr uise control
Fig. 113 Instrument cluster : approach wa rnin 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
off .
Wh at can the b raking guard do?
When detected in time, the system can assess
dangerous situations where an object ahead
brakes suddenly or if your own vehicle is traveling .,..
99

Ass is t
at a high speed and approaching an object that is
moving more slowly. The braking guard does not
react if it cannot detect the s ituation.
The sys tem advises you of various dangerous si t­
uations :
- T he
distan ce warning occurs if you drive too
closely to t he object ahead for a long period of
time . If the ob je ct ahead b rakes strongly, you
would not be able to avoid a collis ion . The .
indicator light appears as an indication for this.
- T he
app roach wa rning occurs when an object
ahead is traveling more slow ly or brakes
strongly . When this warning occurs, it may on ly
be possib le to avoid a co llision by swerv ing or
braking strong ly. The danger is indicated by the
• indicator light
c> fig. 113. An audio signal
will also sound.
If you do not react early enough or at a ll to a dan­
gerous situation, the braking guard supports you
with a brak ing intervention. The approach warn­
ing indicators and the message
Braking guard :
e n gaged
also appear .
- If a collision is imminent, the system will first
provide an
ac ute wa rni ng 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. This reduces
the vehicle speed in the event of a co llision.
- The system can init iate comp lete deceleration
sho rtly before a collision
ll . Full decele ration at
high speeds occurs only in vehicles with adap­
tive cru ise cont rol and s ide assist (pre sense
pl us).
- If the braking guard determines that you are
not brak ing strongly enough when there is an
impending co llision, it can increase the bra king
f o rce .
- T he pre se nse functions also engage when
the re is an impend ing collision
c:> page 216.
Which functions can be controll ed ?
You can switch the braking guard and the dis ­
tance/approach warn ing on or off in the lnfotain-
l ) Ma rket -spe cific
100
ment system c:> page 101, Settings in the Info­
tainment system.
A WARNING
Lack of attent ion can cause collisions, other
accidents and ser ious personal inju ries. The
braking guard is an assist system and cannot
p revent a collision by itself . The driver must
a lways inte rvene . The driver is always respon­
sib le for braking at the co rrect t ime .
- Always pay close attention to traffic, even when the b raking guard is sw itched on. Be
ready to intervene and be ready to take
comp lete contro l whenever ne cessa ry . Al­
ways keep the sa fe and legal dist ance be­
t ween your vehi cle and veh icles up ahead .
- Br ak ing g uard works w ithin limits and will
no t respond o utside the system limits, for
examp le when approaching a stopped vehi ­
cle or stationary obstacle (en d of a traffic
jam or vehicle that has broken down in traf­
fic).
- Always remember that the radar sensor for
the brak ing g uard works only within def ined
detection and range limits that may prevent
the prope r detection o f 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
promptly detected or may not be detected
at al l.
- Reflective surfaces including crash barr iers
or tunnel entrances may impair the function
of the radar sensor.
(D Tips
- You can cancel the braking with increas ing
force that is initiated by the system by bra k­
ing yourself, by acce le ra ting not iceably or
by swerving.
- Keep in mind that braking gua rd can brake
unexpectedly. Always secure any cargo or
objects tha t you are transpo rting to redu ce
t h e risk of damage or injury.

0 co .... N ,..._
N .... 0 0 :c ' Settings in the Infotainment system
Applies to: vehicles with Audi adaptive cruise contro l
.,. Se lect: t he I CAR I fu nction bu tton > Car systems
co ntro l bu tton > Driver a ssist > Audi braking
guard .
System -
Switch the bra kin g g ua rd On/ Off. When
you swit ch the ig nition on, the message
Braking
guard: Off
appears if t he sys tem is switched o ff.
Early warning -The distance and approac h warn­
i ngs i n the display can be sw itched
On/ Off.
@ Tips
- Your settings are automatically stored and
ass igned to the remote cont rol key bei ng
used.
- If you restric t or sw itch off the ESC, the
braking gua rd also sw itches itself off
¢ page 12 7.
- Switch braking guard off when yo u are load­
i ng t he ve hicle on to a vehicle ca rr ier, t rain,
shi p or other type o f transportation. This
c a n p reven t undesired w arnings from the
br akin g guard system.
Messages
Applies to: veh icles with Audi adaptive cruise control
Braking guard: Off
This message appea rs if the sys tem is switc hed
off through the In fota inme nt system . Otherwise ,
if the system is tur ned off, the informa tion ap ­
pears every time shortly after the start of t he
tr ip.
The message also appears if the system is not
avai la bl e d ue to a ma lfunction or if the ESC is
switched off~
page 127. If this is the case, the
system w ill not prov ide warnings about a possi ­
b le co llision.
Braking guard : engaged
This message appea rs if a sha rp bra ke press ure
was applied due to an ac ute wa rn ing.
ACC: unavailable
ACC and Audi braking guard: Unavailable Assist
T
he system cannot gua rantee that it will detect
objects co rrectly and is sw itched off . The sensors
have been moved or are faulty. The p re sense
funct ions may a lso be affected . D rive to an au­
t h ori zed Audi dea ler or authorized Audi Service
Facility immed iate ly to have the malfunction cor ­
rected .
ACC: Currently unavailable. No sensor vis ion
ACC and Audi braking guard: Cu rrently unavail­
able. No sensor vision
Th is mess age appears if the senso r view i s ob ­
str ucted, for examp le by leaves, snow , heavy
spray or dirt. Clean the sensors¢
page 94 ,
fig . 104.
ACC : Currently unavailabl e. Gradient too steep
The road exceeds the maximum poss ible angle
fo r safe adaptive c ruise cont rol operat io n. Adap­
t ive cr uise control is sw itched off.
ACC: only available in D, Sor M
Se lect the D, Sor M selector leve r pos ition.
ACC : Currently unavailable. Parking brake ap •
plied
The ad apt ive cr uise cont rol system sw itches off
a utoma tica lly if the parking brake is se t.
ACC: Currently unavailable . Stability control
( ESC) input .
This message appears if the Electronic Stab iliza­
t ion Control (ESC) is taking action to stab ilize the
vehicle . In t his case, adaptive cruise control
switches off automatically .
ACC off: manual control!
This message appears when adaptive cruise con­
trol cannot set the parking brake. P ress the brake
pedal to prevent the vehicle from ro lling.
• ••
T h ree white do ts appear if a setting canno t be se­
l ecte d w it h t he oper ati ng leve r. For ex ample, this
h appens if a daptive cr uise con trol c annot sta rt
driv ing a utomat ica lly in stop -and -go traff ic be ­
ca use the dr iver has not fastene d their safety
belt . ..,.
101

Ass is t
D oor open
The adaptive c ruise contro l system cannot sw itch
on when a door is open.
Stat ionar y obj ect ah ead
This message appears if you would like to switch
adapt ive cruise control on and there is a station­
ary object or obstacle directly ahead of your vehi­
cle .
Audi active Lane assist
(Lane departure assist)
Description
A ppl ies to: ve hicles w ith Audi active lane assist
Active lane ass ist detects lane marker lines with­
in the l imits of the system us ing a camera in the
windshie ld. If you are approaching a detected
lane marker line and it appears likely t hat you
will leave the lane , the system will warn you with
correct ive steering . You can override t his steer ing
at any time. If you pass over a line, the steering
wheel will vibrate lightly . In order for this warn­
ing vibration to occur, it must first be sw itched
on in the Infotainment system. Act ive lane assist
is ready for operation when the lane marker line
is detected on at least one side of the vehicle.
The system is designed for driving on express­
ways and h ighways and therefore only activates
at speeds above approximately 40 mph (65 km/
h) .
App lies to veh icles with side assist
If you activate a turn signa l when active lane as­
sist is ready and it class ifies a lane change as crit­
ical because of veh icles traveling alongside you or
approaching you, there will be noticeable correc ­
tive steering shortly before you leave the lane .
This will attempt to keep your vehicle in the lane.
A pp lies to veh icles witho ut s ide ass ist
The system will not warn you before crossing a
lane marker line if you have activated the turn
signal. In this case, it assumes that you are
changing lanes intent io nally.
102
App lies to: vehicles wi th adap tive cruise contro l
The corrective steering is targeted based on the
driving situation. In addition to the lane marker
li nes, the system can also take into account other
ob jects such as guard rails. If they are detected in
close prox imity to the ve hicle, active lane assist
helps prevent the vehicle from dr iving too close
to them . There is also pass ing ass istance. The
system does not provide any corrective steering if
i t detects that you are pass ing anothe r vehicle.
.&_ WARNING
- The system warns the drive r that the vehicle
is leaving the lane us ing correct ive steering.
The drive r is always responsible for keeping
the vehicle within the lane.
- The system can assist the dr iver in keeping
the vehicle in the lane, but it does not drive
by itself. A lways keep your hands on the
steer ing whee l.
- Corrective steering may not occur in certain
situations, such as during heavy braking.
- There may be cases where the camera does
not recognize all lane marker lines . Cor rec­
tive stee ring can only take place on the side
of the vehicle where lane marker lines are
detected.
- Other road structures or objects could poss i­
bly be identified un intent ionally as lane
marker lines. As a result, corrective steering
may be unexpected o r may not occ ur.
- The camera view can be restricted, for ex­
ample by vehicles driving ahead or by ra in,
snow, heavy spray or lig ht shining into the
camera. This can resul t in active lane ass ist
no t de tecting the lane marker lines or de­
tect ing them in co rrectly .
- Unde r ce rtain cond it ions su ch as r uts in the
ro ad, a ban ke d roadway or crosswin ds, the
corrective s teer ing alone may not be enough
to keep the vehicle in the m iddle of the lane.
- For safety reasons, a ct ive lane assis t must
no t be use d when there are poor road and/
or weather conditions such as slippery
roads, fog, gravel, heavy rain, snow and the potential for hydrop laning. Using active lane
assist under these cond it ions may increase
the r isk of a crash.