ESP AUDI S8 2012 Owner's Manual

Audi adapt ive crui se c ontrol an d bra kin g guard 8 7
Audi adaptive cruise
control and braking
guard
Introduction
App lies to vehicles: with Audi adaptive cruise control
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 . Th is he lps to make driv­
ing more comfortable both on long highway
stretches and in stop-and-go traffic.
The braking guard system can warn you about
an impending collision and initiate braking maneuvers ¢
page 93.
Adaptive cruise control and Audi braking
guard have technica l limitations that you
must know, so p lease read this section care­
fully, understand how the system works and use them properly at all times.
General information
General information
Applies to vehicles: with Audi adaptive cruise control
Fig. 86 Front of the veh icle: sensors and video came ra
The areas that conta in the radar and ultrason ­
ic sensors and the v ideo camera ¢
fig. 86
must neve r be covered by stickers or other ob­
jects or obstructed w ith dirt, insects, snow or
ice that will interfere w ith the adaptive cruise
control system and Audi braking guard. For in­
formation on cleaning , refer to ¢
page 205.
The same applies for any modifications made
in the front area.
T he function of the Adaptive cruise cont ro l
system and A udi braking guard is limited un­
der some conditions.
- Objects can on ly be detected when they are
w ith in sensor range
¢page 89, fig. 89 .
-The system has a limited ability to detect
objects that are a shor t distance ahead,
off
to the side of your vehicle or moving into
your lane.
- Some kinds of ve hicles 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 a ll.
- Stationary objects¢
page 88.
-When driving throug h curves ¢ page 88.
& WARNING
Always pay attent ion to traffic when adap ­
tive cruise contro l is switched on and brak­
ing g uard is active. As the driver, you are
still respons ible for start ing and for ma in­
taining speed and distance to other ob­
jects . Braking guard is used to assist you .
The driver must a lways take action to avo id
a collis ion. The driver is a lways responsible
for braking at the co rrect time.
- Improper use of adaptive cru ise control
can cause collisions, other acc idents and
serio us pe rsonal in jury.
- Never let the comfort and conven ience
that adaptive cruise control and Audi
braking guard offer dist ra ct you from the
need to be a lert to t raff ic condi tions and
the need to remain in full con trol of yo ur
vehicle at a ll times,
- Always remember that the adaptive
cruise contro l and Audi braking guard
have limits -they will not s low the vehi ­
cle down or maintain the set d istance
when you drive towards an obstacle or
something on or near the road that is not
mov ing, such as vehicles stopped in a
traffic jam, a stalled or disabled vehicle .
I f regis tered by the radar sensors,

88 Audi adapti ve cruise control and bra king gu ard
vehicles or obstacles that are not moving
can trigger a collision warning and if con­
firmed by the v ideo camera, an acute col­
lis ion warn ing .
- For safety reasons, do not use adaptive
cruise co ntrol when driving on roads with
many curves, when the road surface is in
poor condit ion and/or in bad weather
(such as ice, fog, gravel, heavy rain and
hydroplan ing) . Using the system under
these cond it ions cou ld result in a co lli ­
sion .
- Swi tch adap tive c ruise control off tempo­
rar ily when driv ing in turning lanes, on
expressway exits or in construction
zones . This prevents the vehicle from ac­
celerat ing to the set speed when in these
situations.
- The adapt ive cruise control system wi ll
not brake by itse lf if you put your foot on
the accelerator pedal. Doing so can over­
ride the speed and d istance regulation .
- When approaching stationary objects such as stopped traff ic, adaptive cruise
co ntrol will not respond and braking
guard w ill have limited function.
- The adapt ive cruise control system and
braking guard do not react to people, an­
imals, objects c rossing the road or on­
coming objects .
- The function of the radar senso rs can be
affected by reflective objects such as
guard rai ls , the entrance to a tunnel,
heavy rain or ice.
- Never follow a ve hicle so closely that you
cannot stop your vehicle safe ly. The
adaptive cruise contro l canno t slow or
brake the vehicle safely when you follow
another vehicle too closely. Always re­
member that the automatic braking
function cannot br ing the vehicle to a
sudden or emergency stop under these condit ions.
- To prevent unintended operation, always switch ACC off when it is not being used. (D Note
The sensors can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. That cou ld affect the adaptive
cruise control system and brak ing guard.
Have your authorized Aud i dea ler or au ­
thorized Audi Service Facility check their
funct ion .
In curves
Applies to vehicles: with Audi adaptive cru ise contro l
I
Fig. 87 Ex ampl e: dri ving in to a curve
When d riving into a curve c> fig. 87 and out of
a curve, the ad aptive cruise control may react
to a vehicle in the next lane and apply the
brakes. You can override or prevent the brak­
i ng by pressing the acce lerator pedal b riefly .
' Stationary objects
Applies to vehicles: with Audi adaptive cruise control
Fig. 88 Exampl e: objec t ch anging l anes and sta tio nar y
object
T he adaptive cru ise control system only reacts
to objects that a re mov ing o r that the system
has already detected as moving . For examp le,
if a vehicle @, which has already been detect-
ed by the adaptive c ruise contro l, tu rns off o r
ch anges lane and ano ther stationary veh icle .,.

Audi adaptive cruise control and braking guard 93
Audi braking guard
Description
Applies to vehicles: with Audi adaptive cruise control
Fig. 96 Instrument cluster: approach warning
Audi braking guard uses radar sensors and a
video camera. It also functions within the lim­
its of the system when adaptive 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 sud­
denly or if your own vehicle is traveling at a
high speed and approaching a vehicle up
ahead that is moving more slowly . Audi brak­
ing guard does not react if it cannot detect
the situation.
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 collis ion. The indicator
light
I i n the display comes on .
- The
approach warning is given when a de­
tected vehicle up ahead in your lane is mov ­
i ng much more slowly than you are or if it
brakes sharply . When this warning is given,
it may only be possible to avoid a collision
by swerving or braking sharply. The indicator
light
I and indicator in the display will warn
you about the danger
c::> fig . 96. You will a lso
hear an acoustic signal.
If you do not react fast enough or do not react
at all to the situation, Aud i braking guard will
11
This is not ava ilable in som e coun tri es.
intervene by braking and the message braking
guard intervention
will appear.
- If a coll is ion is imminent, the system wi ll
first provide an
acute warning by briefly and
sharply applying the brakes.
- If you do not react to the acute warning,
braking guard can brake with increas ing
force within the limits of the system. This
reduces the vehicle speed in the event of a
collision.
- The system can initiate complete dece lera­
tion shortly before a collision
1>. Full deceler­
ation at high speeds occurs only in vehicles
with adaptive cruise control and side assist
(pre sense plus).
- If the Audi braking guard senses that you
are not braking hard enough when a colli­
sion is immi nent, it can increase the braking
force.
- The pre sense functions also engage when a
collision is imm inent
c::> page 185 .
Which function s can be controlled?
You can switch Audi braking guard and the
distance/approach warning on or off in the
MMI c::> page 94, Settings in the MMI.
A WARNING
Lack of attention can cause collisions, oth­
er accidents and serious personal injuries .
The Audi braking guard is an assist system
and cannot prevent a collision by itself.
The driver must always intervene. The driv­
er is always responsib le 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 complete control when ­
ever necessary. Always keep the safe and
legal distance between your veh icle and
veh icles up ahead.
- Audi brak ing guard works within limits
and will not respond outside the system
lim its, for example when approaching a

Audi adaptive cruise control and braking guard 95
ACC: unavailable at this time . ESP interven­
tion
This me ssage appea rs if the Ele ct ron ic Stab ili­
t y Control (ESC) is wor king to help stab ilize
the vehicle . In this case, adaptive cru ise con ­
trol switches off a utomatica lly .
ACC : Please take over
This message appea rs whe n adapt ive cr uise
con trol cannot set t he parking b ra ke . P ress
the brake pedal to preve nt the vehicle from
r olling .
•••
Three wh ite dots appear if a setting cannot be
se lected with t he se lecto r lever . Fo r example,
this happens if adapt ive cr uise c ontrol can not
resume dr iv ing in stop-and -go traff ic because
one of the conditions required for ACC to wor k
i s not p resent.
Door open
The adaptive c ruise control system cannot
sw itch on when a d oor is open .
Stationary object ahead
This message appea rs if you would li ke to
sw itch ad aptive cr uise con trol o n and t here is
a sta ti onar y ve hicle or obsta cle direc tly ah ea d
of yo ur vehicle.

96 Audi la ne a ssis t
Audi lane assist
Lane assist
Description
Appl ies to vehicles: with lane assist
Lane assist helps you keep your vehicle in your
lane .
Lane assist detects lane marker lines within
the limits of the system using a camera in the
windshield. If you are approaching a detected
lane marker line and it appears likely that you
will leave the lane, the system will warn you
with a light vibration . Lane assist is operable
when the line marki ng the lane is detected on
at least one s ide of the vehicle .
The system will not warn you before cross ing
a lane ma rker line if you have activated the
turn signal. In t his case, it assumes tha t you
a re cha nging lanes intent ionally.
The system is designed for driv ing on free­
ways and expanded highways and thus works
on ly at speeds of 40 mph (65 km/h) o r more .
.&_ WARNING
-Lane ass ist will not keep your vehi cle in
yo ur lane. The system only warns the
dr iver w hen the vehicle is leaving the
lane . The driver is always responsib le for
keeping the vehicle in the lane .
- The camera is not able to detect all lane
boundary lines and in some cases might
also detect lane structures or objects as
boundary lines. This can lead to incorrect
warnings or warnings that fail to go off
at all .
- The camera's visibility can be impaired by
vehicles ahead of you, for instance, or by
rain, snow, heavy spray or light shin ing
in to the camera lens. This can cause lane
a ssist to fa il to detec t bou ndary lines.
- Activating and deactivating
Applies to
vehicles: with lane assist
Fig. 9 7 Turn signal lever: Lane-ass ist button
Fig . 98 W ind shi eld: Lane assist camera viewing win­
dow
"' Press the q fig . 97 button to activate or de­
activate the system. The. or. indicator
light in the instr ument cluster w ill illumi­
nate or go out.
Instrument cluster indicator light
• Ready : The green indicator light shows
that th e system is ready to use . Th e system
can now warn you if yo u are about to cross a
known lane mar ker line.
• Not r ead y: The yellow indicator light
shows that the system is t urned on bu t unable
to send a warning . This can be due to the fol ­
lowing :
- There is no lane boundary line .
- The relevant lane marker lines are not de-
tected (for example, markings in a construc ­
tion zone or because they are obst ructed by
snow, d irt, water or backlighting) .
- The vehicle's speed is below the speed need·
ed to activate it, wh ich is about 40 mph (65
km/h).
- The lane is narrower than about 8
ft . (2.5
m) .

Audi side assist Lane Change Assistant
Description
App lies to vehicles: with si de assist
Fig . 10 1 Sensor detection range
Fig. 102 Disp lay on the exterior mirror
Side assist he lps you monitor yo ur blind spot
and traffic behind your veh icle. W ith in the
limits of the system, it warns you about vehi­
cles that are coming closer or that are travel­
i n g with you with in sensor range
(D
c::, fig . 101: if a lane change is class ified as crit­
ical, the display @ in the exterior mirror
c::> fig. 102 turns on.
The display in the left exterior mirror provides
assistance when making a lane cha nge to t he
l eft, while the display in the right exter ior mir­
r or p rov ides assistance when making a lane
change to t he right.
Information stage
As long as you do not activate the turn signal,
side assist
informs you about vehicles that are
detected and class ified as crit ica l. The display
i n the respec tive mirro r turns o n, but is d im .
Aud i side assist 99
The display remains d im intentionally in the
information stage so that your view toward
the front is not disturbed .
Warning st age
If you activate the turn signal, s ide assist
warns you about veh icles that are detected
and classified as critical. The display in the re ­
spective mirror blinks brightly . If this hap­
pens, check traff ic by glancing in the rearview
mirror and over your shoulder¢
A in General
information on page 100.
@ Tips
- You can adjust the brightness of the dis­
play @¢
page 101.
-Please refer to the instructions fo r tow­
ing a trailer located in¢
page 100.

100 Audi side assist
General information
App lies to vehicles: with side assist
®
©
Fig. 103 Driving s it u at ions
A U D I
• 0
Fig . 104 Rear of th e ve hicle: pos it io n of t he se nso rs
Side assis t fu nctions at speeds above ap prox i­
ma tely 19 mph (30 km/h).
(D V ehicles that are approaching
In certain cases, a vehicle will be classified as
cr itical for a lane change
even if it is still
somewhat far away. The fas ter a vehicle ap­
p ro aches, the sooner the disp lay in the exteri­
or m irror will t urn on.
@ Vehicles traveling with you
Vehicles traveling w ith you are indicated in the
exterior m irror if they are classified as cr it ical
for a lane change. All vehicles detec ted by
side assis t are in dicated by the time they en­
ter your "blind spot", at the latest.
@ Vehicles left behind
If you s low ly pass a ve hicl e tha t sid e ass ist has
dete cted ( the difference in s peed between the
vehicle and you r vehicle is less than 9 mph or
15 km/ h), the display in the exterio r mirror
turns on as soon as the vehicle enters your blind spot.
The disp lay wi ll not t urn on if you quickly pass
a vehicle that s ide assist has detected (t he d if ­
f erence in speed between the ve hicle and your
vehicle is greater than 9 mph or 15 km/h).
Functional limitations
T he radar senso rs are designed to detect the
left and right adjacent lanes when the road
l anes a re the normal width. In certain situa­
t ions, the d isp lay in the exterior mirror may
turn on even though there is no ve hicle locat­
ed in the area that is cr itical fo r a la ne cha nge.
Fo r example:
- if the lanes are narrow or if your are driving on the edge of your lane. If this is the case ,
the system may have detected the vehicle in
another lane that is
not adjacent to you r
cur rent lane .
- if you a re driving through a c urve . Side assis t
may react to a vehicle that is one lane ove r
from the adjacent lane .
- if side assist reacts to other objects (such as
high or d isp laced gua rd rails) .
- In poor weather conditions. The side assist
fu nctions are limited .
Do not cover the radar sensors
c::> fig. 104 with
stickers, depos its, bicycle wheels or other ob­
jects, because this wi ll affect the funct io n. Do
not use s ide ass ist when towing a trailer . For
information on cleaning, refe r to
c::> page 205 .
&_ WARNING
-Always pay a tten tion t o traffic and to the
a rea around your ve hicl e. Side a ssist can ­
no t repla ce a driver's atte ntion. The driv ­
er a lone is always respons ible fo r lane
cha nges a nd similar driving mane uvers.

Audi drive select Driving settings
Introduction
Aud i drive select makes it possible to experi­
ence different types of vehicle settings in one
veh icle. The driver can select th ree
Comfort,
Auto
and Dynamic modes in the MMI to
switch between a sporty and a comfortable
driving mode.
You can also adjust the setting according to
your preferences in the
individual mode. For
examp le, you can combine settings such as a
sporty engine tuning with light steering.
Descript ion
The vehicle setup in each mode depends on
the vehicle's features. The engine, transmis­
sion, steering, reversible safety belt tension ­
ers and adaptive air suspension are always in­
volved .
Engine and transmission
Depending on the mode, the engine and the
transmission respond more quickly or in a
more balanced manner to accelerator pedal
movements. In the sporty dynamic mode, the
transmission sh ifts at higher RPMs.
Air suspension
The adaptive air suspension/adaptive air sus­
pension sport*
( Air suspension in the MMI) is
an electronically cont rolled air suspension and
damping system. They are adjusted depend­ ing on the selected driving mode, the driver's
steering, braking and acceleration input and
the road s urface, veh icle speed and load. A
sporty setting is generally used in vehicles
with adaptive air suspension sport *.
The vehicle clearance va ries depending on the
selected mode and the speed .
The highway setting is activated automatically
when you drive above 75 mph (120 km/h) for
mo re than 30 seconds in the
auto or dynamic
mode. The g round clearance is increased auto-
Audi drive select 103
matically if the speed drops below 44 mph
(70 km/h) for more than 120 seconds.
Steering
The steering adapts in terms of steering effort
and steering ratios. Indirect steering that
moves easily as in comfort mode is especially
s ui ted to long drives on a highway. In con­
trast, dynamic mode provides sporty, direct
steering.
T he following applies to vehicles with dynamic
steering*: the steering ratio changes based on
vehicle speed in order to maintain optimum
steering effort for the driver at all times. This
sets the steering to be less sens itive at higher
speeds in order to provide improved vehicle
control.
Sport diffe rential*
As a component of the all whee l drive system
(quattro
® ) c> page 191, the Sport differen­
tial* distributes the driving power to the rear
axle depending on the situat ion. The dis tribu­
tion of power varies depending on the select­
ed mode, from balanced (comfort) to agile
(dynamic). The goal is a hig h level of agility
and ability to accelerate on curves. Th e vehi cle
is very responsive to steer ing.
Adaptive cruise control*
The behav ior when accelerating can be adjust
from comfortable to sporty, depending on the
drive select mode. Adaptive cruise control al­
so responds to the driving behavior of the ve­
hicle ahead in a more conserva tive or sporty
manner.
(D Note
- Make sure there is enough clearance
above and below the vehicle when park­
ing . The height of the vehicle can change
once it is parked due to temperature
fluctuations, changes to the load condi­
tions and changes to the driving modes,
w hich can affect clearance.
- When transporting the vehicle on a car
carrier, train, ship or by other means, on-
ly tie the vehicle down at the running
IJJ,,

steering angle. The pedestrian warning prompts you to pay even closer attention to
the area in front of the vehicle and to watch
out for pedestrians.
I f another display such as the trip comp uter
replaces the image from the night vision as­
sistant, the indicator light turns red when
there is a pedestrian warn ing
I Q fig. 111.
@ Tips
The pedestrian marking and warning tone can be adjusted in the MMI
¢ page 108.
General information
Applies to vehicles: with night vision assistant
N 0
8 :i:
~
Fig. 112 Front of the vehicle: night vision assistant
camera
The following situations may affect the func­
tion of the night vision assistant system:
- poor v is ibility such as snow, rain, fog or
heavy road spray
- dirty lens on the night vision assistant cam- era
Make sure the n ight v ision assistant camera
i::> fig. 112 is not cove red by stickers, deposits
or any other obstruct ions because that can
prevent the camera from working properly.
F or information on cleaning the lens, refer to
¢page 205.
P edestrian detection depends on the differ­
ence in temperat ure between the person and
the background. Pedestrians may not be de­
tected if the temperature difference is too
small. The pedestrian highlighting feature is
deactivated at temperatures above 77 °F (25
0
() and when it is light outside.
N ig ht visi on ass is ta n t 107
A WARNING
Night vision ass istant has limits and can­
not always detect pedestr ians . Always pay
close attention to traffic and the area
around your vehicle even when night vision
assistant is sw itched on.
- Night vision assistant can only warn
about people located within the visual
range of the infrared camera. The vis ual
range corresponds to the image in t he in ­
strument cluster display.
- Night vision assistant may not detect
peop le and highlight them if
- they are not in an upright posit ion, for
example if they are sitt ing, crouching
or lying down and/or
- if the outline in the display is incom­
plete or interrupted, for example be­
cause the person is part ially hidden by
a parked vehicle .
@ Tips
- Pedestrian detection and the pedestrian
warm ing a re limited to objects that are
detected as pedestrians. The system
does not detect an imals. Even though
the shape and warmth radiated by each
object detected is evaluated, the system
does have limitat ions and it can give in­
correct warnings .
- For technical reasons, the image pauses
in split second intervals.
Switching on and off
Applies to vehicles: with night vision assistant
F ig. 113 Area around the light switch: night v is ion as-
s ista nt button .,.

118 Advanced Parking System
Reverse Parking
Applies to vehicles: with park ing system advanced
Parking mode 1 con be used when parking in
a garage or into a parking space.
Fig. 127 MMI display: aiming at a parking spot
Fig. 128 MMI display : al igning the vehicl e
• Turn the steering wheel until the orange
orientation lines
(D appear in the parking
spot
c::> fig . 12 7 . Use the markings @to help
you estimate the distance from an obstacle. Each marking represents 3
ft (1 meter). The
blue area represents an extension of the ve­
hicle's outline by approximately 16
ft (5 me­
ters) to the rear.
• While driving in reverse gear, adjust the
steering wheel angle to fit the parking space
with the aid of the orange orientation lines
¢(D. @ marks the rear bumper. Stop the
vehicle when the red orientation line © bor­
ders an object
c::> ,& !
_& WARNING
-The rear view camera does not show the
entire area behind the vehicle
¢page 115, fig. 123. Watch out espe­
cially for small children and animals. The rear view camera cannot always detect
them, posing risk of an accident!
- Please note that objects not touching the
ground can appear to be further away
than they really are (for example, the
bumper of a parked vehicle, a trailer
hitch, or the rear of a truck). In this case,
you should not use the help lines to help
with parking, which poses danger of an accident!
(D Note
In the M MI dis play , the direction of travel
of the vehicle rear is represented depend­
ing on the steering wheel angle . The vehi­
cle front swings out more than the vehicle
rear. Maintain plenty of distance so that
your outside mirror or a corner of your ve­
hicle does not collide with any obstacles.
This can damage to your vehicle.
Parallel Parking
Applies to vehicles: with parking system adva nced
Use parking mode 2 to help you parallel pork
along the side of a street.
Fig. 129 MMI display: blue surface in the park ing spot
Fig. 130 MMI disp lay: Blu e curve on the curb