2015 AUDI S8 brake

Audi adaptive cruise control and braking guard 95
tachometer @and is also shown briefly in
thedisplay @c::>fig.101.
.. You must also press the brake pedal when
the vehicle is stopped.
Switching adaptive cruise control off
.. Push the lever away from you into position
@ until it clicks into place. The message
ACC off appears.
@ Indicator lights
II-Adaptive cru ise contro l is switched on.
No vehicles are detec ted up ahead. The stored
speed is ma intained.
• -A moving vehicle is detected up ahead.
The adaptive cruise control system regulates
the speed and distance to the moving vehicle
ahead and acce lerates/brakes automatical ly.
fit -Adaptive cruise contro l is switched on. A
mov ing vehicle up ahead was detected. Your
vehicle remains stopped.
• -When automatic brak ing is not able to
keep enough distance to a previously detected
moving vehicle up ahead, you must take con­
trol and brake
c::> page 97, Prompt for driver
intervention.
© Display
If adaptive cruise control is not shown in the
d isp lay, you can call it up with the multifunc­
tion steering wheel buttons c::>
page 23.
Based on the symbols in the d isplay, you can
determine if the system is maintaining a dis­
tance to the vehicle ahead and what that d is­
tance is.
No vehicle · No veh icle ahead was detected .
White vehicle -A vehicle ahead was detected.
Red vehicle -Prompt for the driver to take ac­
tion
<=:> page 97.
Both
arrow s on the scale© indicate the dis­
tance to the vehicle 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 shows the stored
distance. For information on changing the
stored distance, refer to
c::> page 96. If the
distance selected is too close or may soon be­
come too close, the arrows move into the red
zone on the sca le .
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), will au­
tomatically accelerate the vehicle to 20
mph (30 km/h), which 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 erased
from the system memory.
- You cannot switch the Electronic Stabili­
zation Control (ESC) to the SPORT mode
when adaptive cruise control is switched
on.
Changing the speed
Applies to vehicles: with Aud i adapt ive crui se control
0
f
• 0
Fig. 102 Selector lever: ch ang ing the speed
.. To increase or reduce the speed in incre­
ments,
tap the lever up or down.
-0:, N 0 ± ... a)
.. To increase or reduce the speed quickly, hold
the lever up or down until the red LED @
reaches the desired speed
c::> page 94,
fig.101. ~

96 Audi adaptive cruise control and braking guard
Following any changes, the new stored speed
will be disp laye d briefly in the disp lay @
r::!) page 94, fig. 101 .
Driving in stop-and-go traffic
Applies to vehicles: with Audi adaptive cruise control
The adaptive c ruise co ntrol system a lso as­
sists you in stop -and-go t raffic. If a previous
detected vehicle ahead stops, yo ur vehicle will
b rake to a stop, within the limi ts of the sys­
tem.
• To res ume driv ing with adaptive c ruise con­
t ro l, tap the accelerator p eda l or
• Pull th e l ever toward yo u into posit io n @
r::!) page 96, fig. 10 3.
(D Tips
- If adaptive cru ise con trol is active an d
you r vehi cle do es no t star t dr iving as ex­
pe cted after pulling the leve r onc e, you
c an sta rt o ut a gain by t app ing th e accel­
e ra tor p edal.
- If a n ob sta cle is detecte d w hen y our ve­
h icl e sta rts driv ing , the sys tem w ill
p rompt you to ta ke ove r¢
page 9 7.
Your ve hicl e wi ll drive more s low ly w hen
starting. T his may a lso happe n in some
s ituations when no obstacle is apparent.
Interrupting cruise control
App lies to vehicles: with Audi adaptive cruise co ntrol
Fig. 103 Selec tor lever
R equi rement: adaptive cruise co ntro l mus t be
switched on.
Overriding cruise control
• To a cce lerate manu ally, pull th e lever to ­
ward yo u into position @and ho ld it the re .
The message
ACC override appears . Or
• press the acce lerator pedal.
• To resume cruise cont ro l, re lease the lever
or take y our foot off the accelerator pedal.
Canceling cruise control while driving
• Move the lever in to position @. The mes­
sage
ACC standby a ppears. Or
• press the brake pedal.
• To resume the stored speed, move the lever
into position @.
Canceling cruise control when stopped
• Push the lever away from yo u into posit ion
@ . The message
ACC standby appea rs .
• To resume cruise contro l, press the brake
pedal a nd pu ll th e lever towa rd you into po­
sition @.
_&. WARNING ~ -
Neve r resume the stored speed if th e
speed is too hig h fo r prevailing road, t raf­
fic or weat her co ndit ion s.
Setting the distance
Applies to vehicles: wit h Audi adapt ive cruise control
Fig. 104 Selector leve r: sett ing t he d is ta nce
• Tap the switch to display the current set dis­
tance
<=> fig. 104 .
.,. To inc rease or reduce the d ista nce by incre­
ments, tap the switch again to the left or
r ight. The distance be tween the two vehicles
w ill change in the ins trum en t cl ust er di s-
p la y. ..,.

Audi adaptive cruise control and braking guard 97
When approaching a moving vehicl e up ahead,
the adaptive cruise contro l system automati­
cally brakes to match that object's speed and
then maintains the stored distance.
If the ve­
hicle ahead accelerates, adaptive cruise con­
trol 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 prov ided are specified values .
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.
The various symbols for the time increments appear briefly in the information line @
¢
page 94, fig . 101 when you change the set ­
tings .
,::::::,_,::::::, ___ 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.
,::::::, __ ,::::::, __ Distance 2: This setting corre­
sponds to a distance of 118 feet/36 meters
when traveling at 62 mph (100 km/h), or a
time 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 .
,::::::, __ __ ,::::::, Distance 4: This setting corre-
sponds to a distance of 210 feet/64 meters
when traveling at 62 mph (100 km/h), or a
time interval of 2.3 seconds .
A WARNING
Following other vehicles too closely in­
creases the risk of collisions and serious
personal injur y.
- Setting short distances to the traffic
ahead reduces the time and distance
available 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 .
(D Tips
-Distance 3 is set automatically each time
you switch the ignition on.
- Your standard settings are automatically
stored and assigned to the remote con­
trol key being used.
Selecting the driving mode
Applies to vehicles: with Audi adaptive cruise control
.. Select the desired driving mode in dr ive se­
lect <=;>
page 108.
(D Tips
Your settings are automat ically stored and
assigned to the remote control key being
used.
Prompt for dr iver intervention
Applies to vehicles: with Audi adaptive cruise contro l
Fig. 105 Instrument cluste r: request fo r dr ive r inter­
vent ion
In certain situations, the system will prompt
you to take action . This could happen, for ex­
amp le, if braking by the adaptive cruise con­
trol system is not enough to maintain enough
distance to the veh icle ahead .
The indicator light . and the symbol in the
display will warn you about the situation
<=;> fig. 105. You will also hear an acoustic sig-
nal. ..,.

98 Audi adaptive cruise control and braking guard
-Press the brake peda l to slow your vehicle
down.
Audi braking guard
Description
Ap plies to vehicles: with Audi adaptive cruise co ntrol
Fig. 106 Instrume nt cluste r: approac h warn ing
Braking guard uses radar sensors and a video
camera. It also functions within the limits of
the system when adapt ive cruise control is
switched off .
What can 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
h igh speed and approaching a vehicle up
ahead that is moving more slowly . 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. in 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 wa rning is given,
it may only be possible to avoid a collision
by swerving or braking sharply. Th e indicator
li ght . and indicator in the display will
warn you about the danger~
fig. 106. You
will also hear an acoustic signa l.
ll This is not av ailable in some coun tri es.
If you do not react fast enough or do not react
at all to the situation, braking guard wi ll inter·
vene by braking and the message
braking
guard intervention
will appear.
- If a collision 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 wit h increas ing
force w ithin the limits of the system . This
reduces the vehicle speed in the event of a
collision.
- The system can initiate max imum brak ing
shortly before a collision
1> . Full deceleration
at high speeds occurs only in vehicles with
adapt ive cr uise control and side assist (p re
sense plus) .
- If the brak ing guard senses that you are not
braking hard enough when a collision is im·
minent, it can increase the brak ing force.
- The pre sense functions also engage when a
col lision is imminent ~
page 194.
Which functions can be controlled?
You can switch braking guard and the dis­
tance/approach warn ing on or off in the MMI
~ page 99, Settings in the MMI.
A WARNING
-
Lack of attention can cause collisions, oth-
er accidents and serious personal injuries .
The braking guard is an assist system and
ca nnot prevent a collision by itself. The
driver must always intervene. The driver is
a lways respons ible for braking at the cor­
rect time.
- Always pay close attention to traffic,
even when the braking guard is switched
on. Be ready to intervene and be ready to
take comp lete control whenever necessa­
ry. Always keep the safe and legal dis­
tance between your vehicle and veh icles
up ahead .
- Braking guard works within limits and
will not respond outside the system

,....,
N ,....,
N
0 J:
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Audi adaptive cru ise control and brakin g guar d 99
limits, for example w hen approaching a
stopped vehicle or stationary obstacle
(end of a traffic jam or veh icle that has
br oken down in traffic).
- Always remember that the radar sensor
for the braking guard works only withi n
defined detection and range limits that
may prevent the proper detection of oth­
er 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 in cl ud ing crash barr i­
ers or t unnel entrances may impair the
f unction of the radar sensor .
@ Tips
-You can cance l the braking w ith increas­
i ng fo rce that is initiated by the system
by braking yo urself, by accelerating no­
ticeab ly or by swerving .
- Bra king guard error messages
¢page
99.
- Keep in mind that braking gua rd can
brake unexpec tedly. Always secure any
cargo or objec ts that yo u are transport­
ing to reduce the risk of damage o r in ­
j u ry .
Settings in the MMI
App lies to vehicles: with Audi adaptive cruise co ntrol
.. Se lect : ICARI funct ion button > Car sy stem s
control button > Driv er assist > Audi brak ­
ing guard .
S ystem ·
Switch braking guard On and Off .
When you switch the ignition on, the message
Audi b raking gu ard off appears if the system
is switched off.
Early wa rning -The distance and approach
warn ings in the display can be switched
On /
Off .
(D Tips
-Yo ur settings are automatically stored
and assigned to the remote contro l key
being used at the time the settings are
made.
- If you restrict the ESC, the braking guard
also switches itself off¢ page
199.
-Switch braking guard off when you are
loading the vehicle onto a veh icle carrier
,
train, ship or other type of transporta­
tion. This can prevent undesired warn­
ings from the braking guard system.
Messages
App lies to vehicles : wit h Audi adapt ive cruise contro l
Braking guard : off
This driver message appears if the system is
turned off via the infotainment. Otherwise, if
the system is turned off, the information ap­
pears every t ime shortly after the start of the
trip.
The driver message also appears if the system
is not available due to a malfunct ion or if the
ESC is not switched on¢ page
199. If this is
the case, the system w il l no t prov ide warnings
about a poss ible collision .
Braking guard : activated
This dr iver message appears if sharp brake
pressure was applied due to an acute warning.
ACC: Un availabl e!
ACC and Audi braking guard: not available
The system cannot detect moving vehicles up
ahead correctly and is switched off. The sen­
sors have been displaced or are not working
proper ly . The Audi pre sense funct ions may al­
so be affected. Drive to yo ur autho rized Audi
dealer or author ized A udi se rv ice facility im­
med iate ly to have the malfunction corrected.
ACC: currently unavailable . No sensor vision
A CC and brak ing guide: cu rrentl y una va ila ­
ble . No sensor vision

100 Audi adaptive cruise control and bra king guard
This message appears if the sensor view is ob­
structed, for example by leaves, snow, heavy
spray or dirt . Clean the sensors¢
page 92,
fig. 96.
ACC: Currently unavailable . Gradient too
steep
The road exceeds the maximum possible an­
g le for proper adaptive cruise control opera­
tion . Adaptive cruise control is switched off.
ACC : Only available in D, Sor M
Select the D/S or M selector lever position .
ACC: currently unavailable. Parking brake
applied
The adaptive cruise control system switches
off automatica lly if the parking brake is set.
ACC : Currently unavailable. Stability control
(ESC) input.
This message appears if the Electronic Stabili­
zation Control (ESC) is wo rking to help stabi­
lize the vehicle. In this case, adaptive cruise
control sw itches off automatically.
ACC off: Manual control!
This message appears when adapt ive cruise
control cannot set the parking brake. Press
the brake pedal to prevent the vehicle from
rolling .
•••
Three w hite dots appear if a setting cannot be
selected with the se lector lever. For example,
this happens if adapt ive cruise control cannot
resume driv ing in stop-and-go traff ic because
one of the conditions required for ACC to work
i s not present .
Door open
The adaptive cruise control system cannot
switch on whe n a door is open.
Stationary object ahead
This message appears if you would like to
switch adaptive cru ise control on and there is
a stat ionary vehicle or obstacle directly ahead
of your vehicle .

,....,
N ,....,
N
0 J:
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Selector lever lock
The selector lever lock prevents you from se­l ecting a position unintentionally, causing the
vehicle to roll. When engaging some selector lever positions, you must press the button on
the selector lever
c:> fig. 124 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
c:> fig. 125 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
c:> &. To engage the P se lector lever position,
press the button on the selector lever and
shift into the P position .
You can only shift out of park when the engine is running and you are pressing the brake ped­
al. Press the button on the selector lever to
release the parking lock and select the desired
selector lever pos it ion .
P engages automatically when you switch the
engine off while D, Sor R is engaged or in
manual mode .
If you switch the engine off when 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 vehicle
c:> page 119.
R -Reverse
The reverse gear is engaged in this position .
Only select reverse when the vehicle is sta ­
tionary and the engine is running at idle speed
c:> &. To engage the R selector lever position,
press the button on the selector lever, press
Automatic Transmission 115
the brake peda l and move the selector lever
into the R position.
T he back-up lights turn on when you select
the R selector lever position wh ile the engine
is running .
N -Neutral
The transmission is in idle in this pos it ion . To
engage the N selector lever posit ion, press
the button on the selector lever and shift into
the N position.
If you switch the eng ine off when N is engag­
ed, the transmission remains in N for approxi­
mately 30 minutes and then Pis engaged.
You cannot select the N position when the ig­
nition is switched off. When driv ing through
an automat ic car wash, first select the N posi ­
tion and then switch the engine off
c:> table on
page 216.
The veh icle cannot be locked when the selec­
tor lever is in the N position.
D/S - Posit ion for driv ing forward
In the D/S position, the transmission can be
operated either in the normal mode D or in
the sport mode S . You can only select the S se­
lector lever position when Dis engaged. Move
the selector lever back to engage the S selec­
tor lever position. To select the D selector lev­
er position again when Sis engaged, move the
selector lever back
c:> .&. . To shift from N to D
when traveling at speeds below 1 mph (2km/
h), press the brake peda l and select the D se­
lector lever position
c:> .&. .
In the normal mode D, the transmission auto ­
matically selects the suitable gear ratio.
It de­
pends on engine load, vehicle speed and driv­
ing style.
Se lect the
sport mode S for sporty driving.
The vehicle makes fu ll use of the engine's
power. Shift ing may become noticeab le when
accelerat ing.
The S selector lever position engages auto­
matically when you select the dynamic mode
in Audi drive select.
liJI,

116 Automatic Tran sm iss ion
& WARNING
-Never e ngag e R or P w hile driving . It
could cause a cras h.
-
-Power is sti ll t ransmi tte d to t he whee ls
whe n the e ngine is runni ng at idle . To
prevent the vehicle from "creepin g", you
must keep your foot on the brake 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 s tart to move immediate­
ly. This cou ld happen even if the parking
brake is activa ted .
- Be fore opening the hood, select the P se­
lector lever position and set the par king
brake. This red uces the risk of a crash. Al­
ways read and follow the applicable
warnings
<=)page 228.
-Never get out of the driver's seat when
the engine is running.
- If you mus t get out of the vehicle, move
the se lector lever securely into the P po ­
sition an d apply the park ing brake .
(D Tips
-If you u nin tentionally shift into the N se­
l ector lever posi tion while dr iv ing, ta ke
your foot off the acce lerator pedal and
wait for the e ngine to slow down until it
i s idling before you shift into Dor S.
Driving tips
The gears shi~ automatically .
Starting from a stop
"" Press and ho ld the brake pedal.
"" Sta rt the eng ine
c:> page 83.
"" Press the but ton on the se lector lever and
select the D, S or R selecto r lever pos it ion
c:> page 114 .
""Wait a moment until the transmission
shifts. You w ill not ice a slight movement
when the gear engages .
"" Re lease the brake pedal and press the accel­
erator pedal¢ ,& .
Stopping temporarily
""Press the brake pedal to s top the ve hicle, for
examp le a t a traffic light . Do not press the
accelerato r peda l when doing this.
"" To prevent the vehicle from ro lling when yo u
start dr iving, set the parking brake when
stopping on large incl ines
c:> ,& .
"" The parking brake will release automat ica lly
and the vehicle will start mov ing once you
press the acce lerator pedal.
Parking
If the se lector lever is not in the P position
whe n you open the driver's door, the ve hicle
could roll. The message
Transmission: Car
may roll! Shift to park!
appears .
"" Press and hold the brake pedal¢ ,& .
"" Set the park ing brake.
"" To engage the P se lector lever position,
press the button on the selector lever and
shift into the P posit ion
c:> page 114 .
Under certa in conditions such as dr iv ing in the
mountains or when towing a trailer, it may be
helpful to switch to manual mode tempo rari ly
to shift
manually to adapt to the driving con­
di tions
c:> page 117.
On s lopes, activate the parki ng bra ke first and
then move the selecto r leve r to the P position .
T his prevents too much st ress from be ing
pla ced on the locking mec hanism.
& WARNING
Read an d fol low all WAR NIN GS ¢ .&. in Se­
lecting a selector lever position on
page 116.
- The vehicle can also roll when the engine
is stopped.
- Do not press t he acceler ator pe dal when
chan ging the se lector leve r posi tion
while the veh icle is stationary and t he
engine is running . This cou ld result in a
crash.
- Never engage R o r P while driving .
It
could cause a crash.
- Power is still transmitted to the wheels
when the engine is runn ing at idle. To
IJJ,,