2011 AUDI S8 ESP

Depending on the weight of the r ig (vehicle
and trai ler) and the severity of the incline, you
may roll backwards as you start. You can pre­
vent roll ing backwards by holding the parking
brake switch(®) pulled out and accelerating -
just as you would when starting on a hill with
a conventional hand brake.
Emergency braking
In the event that the conventional brake sys­
tem fails or locks.
... In an emergency, pull the switch(®) and
continue to pull it to slow your vehicle down
with the parking brake.
... As soon as you release t he sw itch (®) or ac-
ce lerate, the braking p rocess stops.
If you pull the sw itch(®) and hold it above a
speed of about 5 mph (8 km/h), t he emergen­
cy braking fu nction is in itiated . The vehicle is
b raked at all four wheels by activating the hy­
d ra u lic bra ke system. The b rake performance
i s simi lar to making an emergency stop
c::> &. .
In order not to activate the emergency brak­
ing by m ista ke, an audible warning tone (b uz­
z er) sou nds when the switch®> is pulled. As
soon as the switch(®) is released, or the acce l­
erator pedal is dep ressed, emergency brak ing
stops .
A WARNING
Emergency braking should only be used i n
an emergency, when the normal foot brake
has failed or the brake pedal is obstructed.
Using the parking brake to perform emer­
gency braking will slow you r vehicle down
as if you had made a fu ll brake applicat ion.
T he laws of physics can not be s uspended
even w ith ESP and its associated compo­
nents (ABS, ASR, EDL). In corners and
when road or weather conditions are bad,
a full brake application can cause the vehi­
cle to skid or the rear end to break away -
r isking an accident.
On th e ro ad 83
Speed warning system
Introduction
The speed warning system helps you to stay
under a specified maximum speed .
The speed warning system warns you if you
are exceeding the maximum speed that you
have set. You will hear a warning tone when
you r speed exceeds the stored value by ap­
proximately 3 mph (3 km/h) . An indicator
li ght . (USA
models) ;a (Canada mode ls) in
the instr ument cluster d isp lay al so tur ns on at
the same time. The indicator light . /.
turns off when the speed decreases be low the
stored maxim um speed .
Se tting a t hreshold is recommended if you
would like to be rem inded w hen you reach a
certain maximum speed. Situations where you
may want to do so incl ude driv ing in a co untry
with a genera l speed limit or if there is a
specified maximum speed for winter tires.
(D Tips
Even though your vehicle is eq uipped w ith
a speed warn ing system, you sho uld still
watch the speedometer to make sure you
are not dr iv ing faster than the speed limit.
Setting the threshold
You can set, change and delete the threshold
in the MMI.
... Select: !CAR ! function button > Car systems
contro l button > Dri ver ass ist > Speed warn­
ing .
You can set any threshold between 20 mph
(30 km/h) and 150 mph (240 km/h) . Sett ings
can each be adjusted in increments of 5 mph
(10 km/h).

84 On the road
Cruise control
Switching on
The cruise control system makes it possible to
drive at a constant speed starting at 20 mph
(30 km/h).
0
f
®t
0
Fig. 83 Control lever w it h set butt on
Fig . 84 D is pl ay: Selected speed
"' Pull the lever to position (D c::> fig. 83 to
switch the system on.
"' Drive at the speed you wish to set.
"'Press button@to set that speed .
I :i:. ... a,
The stored speed and the ind icator light
[ij;W~1~ (US models) / 0 (Canadian models) ap ­
pear in the instrument cluster display
c:;, fig. 84 . The display may vary, depending on
the type of display in your vehicle . The indic a­
tor light . in the instrument cluster also illu­
minates.
The speed is kept constant
via an engine out­
put adjustment or active brake intervention .
8_ WARNING
-Always pay attention to traffic even when
the cruise control is switched on . You are
always responsible for your speed and
the distance between your vehicle and
other vehicles. -
For safety reasons, the cruise contro l
should not be used in the city, in stop­
and-go traffic, on twisting roads and
when road conditions are poor (such as ice, fog, gravel, heavy rain and hydro­
plan ing) - risk of accident.
- Turn off the cruise control temporarily when enter ing turn lanes, highway exit
lanes or in construction zones .
- Please note that inadvertently "resting" your foot on the accelerator pedal causes
the cruise control not to brake. This is
because the cruise control is overridden
by the drive r's acceleration.
- If a brake system malfunction such as
overheating occurs when the cruise con­
trol system is switched on, the braking
function in the system may be switched
off . The other cruise control functions re­
main active as long as the indicator light
m:lmi (US models)/ . (Canadian mod­
els) is on.
(D Tips
The brake lights illuminate as soon as th e
brakes decelerate automatically.
Changing speed
"' Press lever in the 0 or O direction
c::>page 84, fig. 83 to increase or decrease
your speed.
"' Release the lever to save that speed .
Change speed in increments of 1 mph (1 km/
h) by lightly press ing the lever. If you keep the
lever pressed down , you will alter your speed
in 5 mph (10 km/h) increments .
You can also press the accelerator pedal down
to increase your speed, e .g. if you want to
pass someone . The speed you saved earlier
will resume as soon as you release the acceler­
ator pedal.
If, however, you exceed your saved speed by
6 mph (10 km/h) for longer than 5 minutes,
the cruise control will turn off temporari ly.
The green symbol in the display
c> page 84, .,..

Adaptive cruis e control and bra kin g guard
vehicles such as motorcycles and bicy­
cles.
- The adaptive cruise control system can­
not detect people, animals and cannot
detect objects or traffic that crosses your
lane of travel.
- Never drive at speeds that are too fast for traffic, road and weather conditions.
- Never use adaptive cruise control when
you cannot drive safely at a steady speed, including on wind ing roads or
when road conditions are poor (for exam ­
ple, in construction sites, on ice , gravel,
in fog, heavy ra in or on wet roads that in­
crease the risk of hydroplan ing).
- Never follow a veh icle so closely that you
cannot stop your vehicle safely. The
adaptive cruise cont ro l cannot slow or
brake the veh icle safely when you follow
another veh icle too closely. Always re ­
member that the automatic braking
function cannot bring the vehicle to a
sudden or emergency stop under these
condit ions.
- Never rest your foot on the acce lerator
pedal, especially when the adaptive
cruise control is being used. Pressure on
the accelerator w ill override the adaptive
cruise control braking function and pre­
vent the brakes from being applied whe n
adaptive cruise cont ro l detects a situa­
t io n when the brakes must be applied.
- Never use adaptive cruise control whe n
the radar sensors cannot accurately de­
t ect vehicles moving in t raff ic. The rad ar
sensor's vision can be reduced by heavy
rain, ice, snow, heavy road spray and re­
flect ions from guard rails, t unnel ent ran­
ces, etc. These and simi lar conditions can
prevent vehicles from being accurately
detected and in some cases they may not
be detected at all .
- Always turn off adaptive cru ise contro l
when entering turn lanes, exit lanes and
constr uction zones or in similar sit ua­
t ions because the vehicle will automati­
ca lly accelerate to the sto red speed when
the roa d ahead is clear. -
To prevent unintended operation, a lways
sw itch ACC off when it is not being used .
(D Note
The sensors can be moved by impac ts or
damage to the bumper, wheel housing and underbody . Damage in these areas could
change the way the adaptive cru ise control
system and Aud i brak ing guard work to­
gether . Have your authorized Audi deale r
check to make s ure that the adaptive
cruise control system is wor king p roperly if
your vehicle had a m ino r frontal impact or
was damaged in the area of the sensors.
In curves
Applies to vehicles: wi th adaptive cruise control
Fi g. 86 Exa mpl e: dri vin g into a curve
When dr iving into a curve¢ fig. 86 and out of
a curve, the adaptive c ruise control may react
to a vehicle in the next lane and app ly the
brakes . You c an override or preven t the brak­
ing by pressing the accelerator pedal b riefly .
Stationary objects
Applies to vehicles: wit h adaptive cruise control
Fig. 87 E xam ple: object c hanging l anes a nd s tationa ry
o ~ect
~
8 7

Adaptive cru ise co ntrol and b rakin g guar d 89
You must also press the b rake pedal when
the vehicle is stopped.
Sw itching adapti ve cruis e co ntrol off
~ Push the lever away from you into position
@ until it clic ks into p lace. The message
A CC off appears.
I ndicator lamps and messages in the instru­
ment cluster display inform you about the c ur­
rent system status and settings.
@ Indic ator light s
fl-adaptive cruise control is sw itched on . No
veh icles are detected up ahead . The stored
speed is ma inta ined.
I -A moving vehicle is detected up ahead .
The adaptive cruise control system regulates
the speed and distance to the moving veh icle
ahead and accelerates/brakes automat ically.
f:i -adaptive cru ise control is switched on. A
mov ing vehicle up ahead was detected. Your
veh icle remains stopped and will not start
driving automatically.
I -When automat ic braking is not able to
keep enough distance to a previously detected
mov ing vehicle up ahead, you must take con­
trol and brake¢
page 90, Prompt for driver
intervention.
© Di splay
If adaptive cruise control is not shown in the
d isplay, you can call it up with the multifunc­
tion steering wheel buttons
¢ page 23 .
Based on the symbols in the display, you can
determine if the system is maintaining a dis­
tance to the vehicle ahead and what that d is­
tance is .
No v ehicle -No vehicle ahead was detected.
White vehicle -A vehicle ahead was detected .
Red ve hicl e -Prompt for the d river to take ac­
tion
¢ page 90.
Both arr ow s on the scal e© indicate the dis­
tance to the vehicle ahead . No ar row appears
when the vehicle is on an open road and there is no object ahead.
If an object is detected
ahead, the arrow moves on the scale .
T he green zone on the sca le shows the stored
distance. For informat ion on changing the
stored distance ¢
page 91. If the distance
selected is too close or may soon become too
close, the arrows move into the red zone on
the scale .
A WARNING
Improper use of the adaptive cruise con­
trol can cause collisions, other accidents
and serious personal injur ies .
- Pressing the
!SET ! button when driv ing at
speeds below
20 mph (30 km/h), w ill au­
tomatically accelerate the vehicle to
20
mph (30 km/h), wh ich is the minimum
speed that can be set .
(D Tips
- If you switch the ignit ion or the adaptive
cruise control off, the set speed is e rased
from the system memory.
- You cannot switch the Electron ic Stabili­
zation Program (ESP) to the SPORT mode
when adaptive c ruise control is sw itched
on.
Driving in stop-and-go traffic
Appl ies to vehicles: wi th adap tive c ruise control
T he adaptive cru ise contro l system also as­
sists yo u in stop-and-go traffic. If a previous
detected vehicle ahead stops, your vehicle wi ll
brake to a stop, within the limits of the sys­
tem.
~ To resume driving with adaptive cruise con­
trol, tap the acce lerator pedal or
~ Pull the lever toward you into position @
¢ page 88, fig. 89.
(D Tips
- If adaptive cruise control is act ive and
your vehicle does not start driving as ex­ pected after pu lling the lever once, you
can start out again by tapping the acce l-
erator peda l. ..,.

Adaptive cru ise co ntrol and b rakin g guar d 93
A WARNING ,~
The Audi braking guard is an assist system
and cannot prevent a collis ion by itself.
The driver must always intervene. The driv­ er is always responsible for braking at the
co rrect time.
- Always pay close attention to traffic,
even when the Aud i brak ing guard is
switched on. Be ready to intervene and
be ready to take complete control whe n­
ever necessary. Always keep the safe and
legal distance between your vehicle and
vehicles up ahead.
-Audi braking guard works within limits and wi ll not respond outside the system
limits, for examp le when approaching a
stopped vehicle or stationary obstacle
(end of a traff ic jam or vehicle that has
broken down in traffic).
- Always remember that the radar sensor
for the Audi braking guard works only
within defined detect ion and range limits
that may prevent the proper detection of
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 de ­
tected at al l.
- Reflective surfaces includ ing c rash ba rr i­
ers or tunnel en trances may impair the
function of the radar sensor .
(D Tips
Innattention can cause collisions, other ac­
cide nts and serious persona l injuries.
- You can stop the Audi b raking guard in­
te rvention w ith increas ing braking force
by applying the brakes yourse lf or by a c­
ce le rat ing rapidly.
- Audi braking guard error messages
¢page 93.
Settings in the MMI
App lies to vehicles : wi th adap tive c ruise contro l
.,. Select: !CAR ! function button> Car sy ste m s
cont ro l butto n > Driv er a ssist> Audi brak ­
ing gua rd .
S ys tem -
Switch Audi b raking guard On and
Off . When you switch the ign it ion on, the
message
Audi br aking guard off appears in
the instr ument cluster d isp lay if the system is
switched off.
E arly warning -The distance and approach
warnings in the d isplay can be switched
On/
Off.
(D Tips
- Yo ur settings are automatically stored
and assigned to the remote cont ro l key
being used at the times the settings are
made.
- If you switch the ESP to sport mode, A u­
di braking guard switches off a utomati ­
cally
¢page 192.
Messages
App lies to vehicles : wi th adap tive c ruise control
ACC una vailable
ACC and braking guard: unavailabl e
The system cannot detect moving vehicles up
ahead co rrectly and is switched off . The sen­
sors have been d isplaced or are not worki ng
proper ly. The Audi pre sense functions may a l­
so be affected.
ACC: unavailabl e at this time. No sensor vi ­
s ion
ACC and b rak ing gu ide: una vailable at this
time . No s enso r vision
This message appears if the sensor view is ob­
structed, for examp le by leaves, snow, heavy
spray or d irt . Clean the sensors¢
page 86,
fig. 85.
ACC: unav ailable at this time. Incline too
steep

94 Adaptive cruise control and braking guard
The road exceeds the maxim um possible an­
gle for proper adaptive cruise contro l opera­
tion. Adaptive cruise control is sw itched off .
ACC: only selector lever positions D, S or M
available
Select the D, Sor M selector lever position.
ACC: unavailable at this time. Parking brake
set
The adaptive cruise control system switches
off automatically if the parking brake is set .
ACC: unavailable at this time. ESP interven­
tion
This message appears if the Electronic Stabili­
zation Program (ESP) is working to he lp stabi ­
lize the vehicle. In this case, adaptive cruise
control switches off automatically.
ACC : Please take over
This message appears when adapt ive cr uise
control can not set the parking brake. Press
the brake pedal to prevent the vehicle from
r olling .
•••
Three wh ite dots appear if a setting cannot be
selected with the operat ing lever . For exam­
ple, this happens if adaptive cru ise control
cannot resume driving in stop-and-go traffic
because one of the conditions required for
ACC to wor k is not prese nt.
Door open
The adaptive cruise control system cannot
switch on when a door is open.
Stationary object ahead
This message appears if you wou ld like to
switch adaptive cruise control on and there is
a stationary veh icle or obstacle directly ahead
of your vehicle.

Audi lane assist Lane assist
De scription
App lies to vehicles: with la ne ass ist
Lane assist helps you keep your vehicle in your
lane.
Lane assist uses a camera to detect lane boun ­
dary lines . If the system detects that your ve­
hicle is about to cross a detected lane boun­
dary line, the steering wheel
vibrates to alert
the driver . Lane assist is operable when the
line marking the lane is detected on at least
one side of the veh icle. This is ind icated by a
g reen indicator light. in the instrument
cluster.
If the system is in active standby mode and
the turn signal is activated before driving over
the bounda ry line, the warn ing does not occur
since the system allows for intentional lane
changes.
The system is designed for driv ing on free­
ways and expanded highways and thus works
only at speeds of 40 mph (65 km/h) or more.
A WARNING
- Lane assist will not keep your vehicle in
your lane . The system only warns the
driver when the vehicle is leaving the
lane . The driver is always responsible 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 wa rnings tha t 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 o r light sh in ing
into the camera lens. Th is can cause lane
assist to fa il to detect boundary lines.
Audi lane a ssis t 95
Act ivating and deactivating
App lies to vehicles: wit h lane assist
Fig. 95 Turn sign al lever: Lane assist button
Fig . 96 W inds hield: La n e ass ist camera vi ewing w in­
dow
"' Press the Q fig . 95 button to activate or de­
ac tivate the system . The/: indicator light
on the instr ument cluster will illuminate or
go out.
Instrum ent clu ster ind icat or light
• Rea dy:
The green indicator light shows
that the system is ready to use.
A warning
alerts the driver when the vehicle drives over
detected lane bounda ry lines.
• Not r ea dy: The yellow indicator light
shows that the system is turned on but unable
to send a warning. This can be due to the fol­ low ing :
- There is no lane boundary line .
- The boundary lines are not detected (e.g .
due to snow, d irt, wet conditions or l ight
shin ing into the camera lens) .
- The vehicle 's speed is below the speed need ­
ed to activate it, which is about 40 mph (65
km/h).
- The lane is narrower than about 8
ft. (2 .5
m) .
-The curve is too sharp .

98 Audi side assist
Audi side assist
Lane Change Assistant
Description
App lies to vehicles: with si de assist
The side assist helps you when changing
lanes.
GID
A UDI
Fig. 99 Rear bumper: Posit ion of radar se nsors (not
vis ible on outs ide)
Fig. 100 Signal light on the outside mirror -driver's
side
ID ,._
8
i
.. a,
Side assist uses radar sensors (not visib le on
outside) ¢
fig. 99 to help the driver check
blind spots, and see what is happening in traf­
fic behind the vehicle
¢page 99, fig. 102.
Signal lights are built into both outside mir­
rors ¢
fig. 100. The signal light on the left
outside mirror assists when moving over into
the left lane and the signal light on the right
outside mirror assists when moving over into
the right lane.
The s ignal light comes on to tell you that side
assist has detected a vehicle on that side and
that the position of this other vehicle should
be taken into account if you were to change
lanes. This is called the
informational stage
signal ¢page 100.
The informational stage signal
is designed so that you notice it only
when you are looking in the outside mirror.
When you activate the turn signal and side as­
s ist detects a vehicle in a notable location, the
corresponding signal on the outside mirror
flashes briefly and brightly several times. This
is the
alert stage signal ¢ page 100.
Activating and deactivating
App lies to vehicles: wit h side assist
Fig. 101 Driver 's door: Side assist button
Activating
a,
ij
:r
" a,
"' Press the button¢ fig. 101. The indicator on
the button lights up.
Deactivating
"' Press the button again. The indicator light
on the button goes out .
The system works at speeds faster than 19 mph (30 km/h) .
A WARNING
-- Improper reliance on the side assist sys-
tem can cause collis ions and serious per­
sonal injury:
- Never rely on ly on side assist when
changing lanes.
- Always check rear view mirrors to make
sure that it is safe to change lanes.
- Side assist cannot detect all veh icles un ­
der all conditions- danger of acc ident!
- Side assist cannot detect vehicles in time
to a lert you when they approach from
behind at very high speed, or fall drop
back very quickly. ..,_