2011 AUDI S8 brake

Adaptive cruise control and braking guard 91
Setting the distance and driving
program
Applies to vehicles: with adaptive cruise co ntrol
Fig. 93 Operating leve r: sett ing the distance
The distance at which the adaptive cruise con­
trol follows a vehicle in front is determined by
time interva ls. A time interval to a vehicle in
front is estab lished and maintained. This pro ­
duces a speed-dependent inte rval. The higher
the speed, the greater the safety interval in
yards (meters)¢ ,&.
Setting the distance
~ Tap the switch to d isplay the current set dis­
tance
¢fig. 93.
~ To increase or reduce the distance by incre­
ments, tap the switch again to the left or
right. The distance between the two vehicles
will change in the instrument cluster dis­
play.
Setting the driving program
~ Select in the MMI: !CAR ! function button >
Car Systems control button > Driver assist >
adaptive cruise control > Driving program .
Setting the distance
When approaching a movi ng veh icle up ahead,
the adaptive cruise contro l system automati­
cally brakes to match that object's speed and
then maintains the stored distance. When this happens, the actual distance may briefly be
less than the stored distance. If the veh icle
ahead accelerates, adaptive cruise control will
also accelerate up to the stored speed.
The higher the speed, the greater the distance
in yards (meters) ¢&. . The
Distance 3 setting
is recommended. The distances
provided are specified va lues.
Depending on the driving situation and the
how the vehicle ahead is driving, the actual
distance may be more or less than these tar­
get distances.
,;:::::;, _c::::, ___ Distance 1: This setting corre-
sponds to a distance of 92 feet/28 meters
when traveling at 62 mph (100 km/h), or a
time interval of 1 second.
,;:::::;, __ c::::, __ Distance 2: This setting corre­
sponds to a distance of 118 feet/36 meters
when traveling at 62 mph (100 km/h), or a
t ime interval of 1.3 seconds.
,;:::::;, ___ ,;:::::;,_ Distance 3: This setting corre-
sponds to a distance of 164 feet/SO meters
when traveling at 62 mph (100 km/h), or a
time interval of 1.8 seconds.
,;:::::;, ____ c::::, Distance 4: This setting corre-
sponds to a distance of 210 feet/64 meters
when traveling at 62 mph (100 km/h), or a
t ime interval of 2.3 seconds.
Setting the driving program
You can select Dynamic, Standard or Comfort
driving programs. Depending on the selected
driving program and distance, driving behav­
ior when accelerating will vary from dynamic
to comfortable.
.&_ WARNING
Following other vehicles too closely in­
creases the risk of coll is ions and ser ious
personal injury.
- Sett ing short d istances to the traffic
ahead reduces the time and distance
availab le to bring your vehicle to a safe
stop and makes it even more necessary
to pay close attention to traffic.
-
-Always obey applicable traffic laws, use
good judgment, and select a safe follow­
ing d istance for the traff ic, road and
weather conditions .
(0 Tips
-Distance 3 is set automat ically ea ch time
you switch the ignition on. ..,.

92 Adaptive cruise control and braking guard
-Your standard settings are automatically
stored and assigned to the remote con­
trol key being used .
Audi braking guard
Description
Applies to vehicles: wit h adapt ive c ru ise control
Fig. 94 Instrument cluster: approach warn ing
Audi brak ing guard uses radar sensors and a
video camera . It is active at speeds above
about 6.2 mph (10 km/h) and also works
within system limits when adaptive cruise control is switched off.
On vehicles with aAdaptive cruise control and
Audi side assist (Audi pre sense plus), system
functions also engage when a co llision is im­
minent
¢page 188.
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 veh icle is traveling at a
h igh 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 kinds situa­ tions :
- 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 coll is ion. The ind icator
light
I i n the d isplay comes on. Take imme ­
diate action to avoid the coll is ion and in­
crease the distance to the vehicle up ahead. -
The
approach warning is given when a de­
tected vehicle up ahead in your lane is mov­
ing much more slowly that you are or if it
brakes sharp ly. When this warning is given,
it may only be possible to avoid a collision
by swerving or braking sharp ly . The indicator
light
I and the symbol in the disp lay will
warn you about the danger
c:> fig. 94 . You
w ill also hear an acoustic signal.
If you do not react fast enough or do not react
at all to the situation, Aud i braking guard w ill
intervene by braking and the message
braking
guard intervention
w ill appear.
- If a coll is ion is imminent, the system will
first provide an
acute warning by brak ing
sharply .
- If you do not react to the acute warning, Au­
di braking guard will brake w ith increased
force in severa l stages to reduce the speed
in a possible collisio n. On ve hicles w ith
adaptive cruise contro l and Audi side assist
(Audi pre sense plus), the system can brake
with increasing force up to maximum decel­
eration shortly before a sensed collision
¢ page 188.
- If
the Audi braking g uard senses that you
are not braking hard enough when a colli­
sion is imminent, it can increase the braking
force.
Audi braking guard takes the driver's reaction
time into consideration in order to provide
timely warnings. The system reaction time de­ creases automatically in some situations, for
example when it detects accelerator pedal use
or steering input . The Audi braking guard in­
tervent ion stops in certa in situations, for ex­
amp le if you press the accelerato r pedal to
pass the vehicle moving ahead of you in your
lane.
Which functions can be controlled?
You can switch Audi braking guard and the
distance/approach warning on or off in the
M M I c:> page 93, Settings in the MMI.

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.

~ You may need to release the selector lever
lock depending on which se lector lever posi­
t ion is selected and which one you would
like to select ¢
page 113, Selector lever
lock .
~ To engage the nearest selector lever posi ­
t ion, move the selector lever forward/back
until you feel the first pressure po int. The
selector lever will return to its original posi ­
tion.
~ T o skip over one (or two) se lector lever posi­
tions, move the se lector lever past the first
(and second) pressure point into the desired
pos it ion. The selector lever will return to its
original position.
F or example, to move directly from the
D se­
lector lever position to
P when stopping the
vehicle, you can shift past the
N and R selec­
tor lever positions.
Selector lever lock
The selector lever lock prevents you from se­
lecting a position unintentionally, causing the
vehicle to roll. When engaging some selector
lever positions, you must press the button on
the selector lever¢
fig. 119 and/or press the
brake pedal.
You must press the brake pedal to engage a
selector lever position when the engine is run­
ning while the vehicle is stationary. The ar­
rows ¢
fig. 120 indicate when you need to
press the button on the selector lever.
The selector lever does not lock if you shift from
D to R within one second. This allows
you to "rock" the vehicle to free it when it is
stuck .
P- Park
The whee ls are locked in this position. Only
shift into park when the vehicle is stationary
¢ & .To engage the
P selector lever position,
press the button on the selector lever and
shift into the
P position .
You can only shift out of park when the eng ine
is running and you are pressing the brake ped­
al. Press the button on the selector lever to
Automatic Transmission 113
release the parking lock and select the desired
selector lever position.
P engages automatically when you switch the
engine off while
D, Sor R is engaged or in
manua l mode .
If you switch the eng ine off whe n N is engag­
ed, the transmission remains in
N for approxi­
mately 30 minutes and then Pis engaged.
You must use the emergency release proce­
dure to release the parking lock before towing
the vehi cle ¢
page 116.
R- Reverse
The reverse gear is engaged in this pos it ion .
Only select reverse when the vehicle is sta­
tionary and the engine is running at id le speed
¢ & -To engage the
R selector leve r position,
press the button on the selector lever, press
the brake pedal and move the selector lever
into the
R position.
T he back-up lights turn on when you select
the
R selector lever position while the engine
' ' 1s ru nning .
N -Neutral
The transmission is in idle in this pos it ion. To
engage the
N selector lever position, press
the button on the selector lever and shift int o
the
N posi tion.
If you switch the engine off whe n N is engag­
ed, the transmission remains in
N for approxi­
mately 30 minutes and then Pis engaged.
The vehicle cannot be locked when the selec ­
tor lever is in the
N position .
When dr iving through an automat ic car wash,
first select the
N position and then switch the
engine off¢
page 207.
D - Drive
In this position, the transmission shifts up
and down automatically depending on engine load, veh icle speed and the dynamic shift pro-
gram (DSP) .
IJJ,,

114 Automatic Tran sm iss io n
To shift from N to D when traveling at speeds
be low S km/h, press the brake pedal and se­
lect the
D se lector lever posit ion ¢ & .
Under certain condi tions such as driving in the
mountains or when towing a trailer , it may be
he lpful to switch to manual mode temporarily
to sh ift
manually to adapt to the driv ing con­
d itions
¢ page 115.
S · Sport
The S pos it ion can be selected for sporty driv­
ing . Upshifting at a higher RPM makes full use
of the engine's power .
You can on ly select the
S se lector lever posi ­
tion when Dis engaged. Move the selector
l ever back to engage the
S se lector lever posi­
tion . To select the
D selector lever position
again when
S is engaged , move the selector
lever back¢ &.
The
S selector lever position engages auto ­
matica lly when you select the dynamic mode
in Audi drive select .
A WARNING
-Never engage R or P while driving. It
cou ld cause a crash.
-
- Power is st ill transmitted to the whee ls
when the eng ine is running at idle. To
prevent the vehicle from "creeping", you
must keep your foot on the b rake in all
selector lever positions except
P and N
when the eng ine is running. Do not inad­
vertent ly press the accelerator pedal
when the veh icle is stationary . Otherwise
the vehicle will start to move immediate­
ly . T his cou ld happen even if the parking
brake is activated.
- Before opening the hood, select the
P se­
lector lever position and set the parking
brake. Th is reduces the risk of a crash . Al­
ways read and follow the applicable
warnings¢
page 216, Engine compart­
ment .
-Never get out of the driver's seat when
the engine is runn ing . -
If you must get out of the vehicle, move
the selector lever secure ly into the P po­
sition and apply the parking brake firmly.
@ Tips
- If you unintentionally shift into the N se­
lector lever position whi le driving, take
your foot off the accelerator pedal and
wa it for the engine to slow down until it
is idling before you sh ift into Dor
S.
Driving tips
The gears shif t au toma tically.
Sta rting from a stop
.. Press and hold the brake peda l.
.. Start the engine ¢
page 79.
.. Press the b utton on the selector lever and
select the
D , Sor R selector lever position
¢page 112.
.. Wait a moment until the transmission
shifts . You will notice a slight movement
when the gear engages .
.. Release t he b rake peda l and press the acce l­
erator pedal ¢,& .
Stopping temporarily
.. Press the brake pedal to stop the veh icle, for
example at a traffic l ight . Do not press the
accelerator peda l when do ing th is .
.. To prevent the vehicle from ro lling when you
s tart dr iving, set the par kin g b rake when
s topping on la rge incl ines ¢
A_.
.. The parking brake will release automatica lly
and the vehicle will start moving once you
press the acce lerator pedal.
Parking
.. Press and hold the bra ke peda l¢ ,& .
.. Set the parking brake .
.. To engage the
P selector leve r position,
press the button on the selector leve r and
shift into the
P position ¢ page 112.
When park ing on a level su rface, simp ly place
the se lector lever in the
P position. On slopes,
activate the par king brake first and then move
Iii>

the selector lever to the P position. This p re­
vents too much stress from being placed on
the locking mechanism .
.&_ WARNING
Read and follow all WARNINGS c> .&. in Se­
lecting a selector lever position on
page
114 .
-Do not press the accelerator pedal when
changing the selector lever pos ition
wh ile the vehicle is stat ionary and the
engine is running . This could result in a
crash .
- Never engage
R or P while dr iving . It
cou ld cause a crash .
- Power is still transmitted to the wheels when the eng ine is running at idle. To
prevent the vehicle from "creep ing", you
must keep your foo t on the b rake in all
selector lever positions ex cept
P and N
when the engine is running . Do not inad­
vertent ly press the accelerator pedal
when the vehicle is stationary. Otherwise
the vehicle will start to move immediate ­
ly, even if the parking brake is set. This
cou ld result in a crash .
Kick-down
Kick-down enables maximum acceleration.
When you press the accelerator pedal down
beyond the resistance point, the automatic
transmission downshifts into a lower gear, d e­
pending on vehicle speed and engine RPM. It
shift s up into the next higher gear once the
maximum specified engine RPM is reached .
.&_ WARNING
Please note that the wheels could spin on
slick or slippery roads when kick-down is
act ive .
Autom atic Tra nsmi ssi on 115
Shifting manually
T he shift paddles allow the driver to shift the
gears manually .
Fig . 1 21 Steer ing w hee l: s hifting man ually
... To shift to a higher or lowe r gear temporari­
ly , tap the
0 or O shift padd le c> fig. 121 .
... To switch manua l mode on, press the~
button .
M and the gear that is current ly en­
gaged @appears in the instrument cluste r
display
c> page 112, fig. 118.
... To shift up one gear, tap the righ t shift pad­
dle
0 c> fig . 121 .
... To sh ift down one gear, tap the left shift
paddle Q .
... To swi tch manua l mode off, press the~
button aga in , or
... Move the selector lever back and release it .
When you accelerate o r reduce the speed, the
transmission automa tical ly shifts into the cor ­
rect gear sho rtly before reaching the RPM lim­
it. If you select a lower gear than the one c ur­
rently shown in the display, the automatic
transmiss ion will on ly shift down once there is
no danger of exceeding the maximum RPM .
T he engine braking effect increases when yo u
downshift when going downhill.
Transmission malfunction
[G) Transmiss ion : please press the brake ped ­
a l and select the po sit ion again
Press the brake pedal and select the desired
selector lever position again. You can then
continue driving.
[G] Tran smi ssion h ot: plea se m odify driving
~le
~

116 Automatic Transmission
The transmission temperature has increased
significantly due to the sporty driving manner.
Drive in a less sporty manne r until the tem­
perat ure returns to the norma l range and the
indicator light switches of.
[O] Gearbo x malfunction: you can continue
driving
T here is a sys tem m alfu nction in the tr ansmis­
sion. You may continue driving. Drive to your
authorized Audi dealer or qualified repair fa­
cility soon to have t he mal function corrected .
[o]tli] Gearbox malfunction: you can contin­
ue driving in D only until engine is off
There is a sy stem ma lf u nction in t he transmis ­
sion . T he tra nsmi ssion i s sw itch ing t o emer­
gency mo de. If yo u t urn t he eng ine off, you
will not be a ble to se lect any other se lector
leve r positions after starting the engine again .
Drive to yo ur autho rized Audi dealer o r quali ­
f ied repair fac ility immediately to have the
malfunction cor rected.
[O] Gearbox malfunction: you can continue
driving (limited fun ction ality )
There is a sys tem m alfu nction in the tr ansmis­
sion. The transmission is sw itching to emer ­
gency mo de. Th is mode only shifts into cer ­
tain gears or will not longer shift at all . The
engine may sta ll. Drive to your authori zed Au­
d i dea ler or qualified repa ir facility immed i­
ately to have the malfunction corrected.
[ojtli] Gea rbox malfunction: no reverse gear
(you can continue driving)
There is a sys tem ma lf u nction in t he transmis ­
sion. The transm issi on is sw itchi ng to emer­
gency mode. Th is mode only sh ifts into cer­
tain gea rs or will not longer sh ift at a ll. You
cannot engage the reverse gear . Drive to y our
author ized Audi dealer immed iately to have
the m alfu nct ion co rrected .
[O] Vehicle may roll! Cannot sh ift to P. Please
apply parking brake
- The pa rking lock was released using t he
eme rgency release
c:> page 116. Or -
The parking b rake canno t engage au toma ti­
cally . Drive to yo ur a uth o rize d Audi deale r or
qua lified repair fac ility immediately to have
the ma lfu nction corrected .
[O] Gearbox malfunction: Stop and shift to P
Do not con tinue dr iving . S e lect the P sele ctor
l ever p osition and see your auth o riz ed A udi
de aler or qua lifi ed rep air fac ility for ass is ­
tance .
Parking lock emergency release
The p ark ing lock mu st be relea sed using the
emerge ncy release before towing the vehicle .
@)
Fig. 122 Driver 's s ide footwell: releas ing t he pa rk in g
l ock u sin g the eme rge ncy re lease
Fig . 1 2 3 Drive r's side foo twell: rese tt in g t he park ing
l ock
T he eme rgency release is located under the
floor mat on t he driver's side . You operate the
emergency release from t he d river 's seat.
Releasing the parking lock us ing the
emergency release
.. To prevent the vehicle from ro lling uninten­
tionally, set the parking brake(®)
c:> page 81
or press t he brake pedal.
.. There are two slits on the cover. Posit io n the
scr ewdrive r from the vehicle too l kit i n one
IJI,