2014 AUDI S8 warning light

90 On the road
Engine will not swit ch off
Before each stop phase, the system checks i f
certain cond itions have been met. For exam ­
p le, the engine will
n ot be switched off in the
following situations:
- T he eng ine has not reached the minimum
required temperature for Start -Stop-mode .
- The inter io r temperature selec ted by the A/C
system has not been reached .
- T he outs ide temperature is extremely h igh/
low .
- T he w indshield is being defrosted
¢page 82.
-The parking system* is switched on.
- The battery charge level is too low .
- The steering wheel is sharply turned or
there is a steering movement.
- After engaging the reverse gear.
- On sharp inclines.
The
tiij indica to r light appears in the informa­
tion line in the ins trument cluster disp lay
<=:>fig . 89 .
Engine automatically restarts
The stop phase is interrupted in the following
situations, for examp le. The engine restar ts
witho ut any act ion by the driver.
- T he interio r temperature varies from the
temperature selected in the A/C system .
- The w indshield is being defrosted
<=:> page 82.
- The brake pedal is pressed several times i n a
row .
- The battery charge level becomes too low .
- High power consumption.
Sw itching the ignition automatically
To prevent the battery from d raining, the igni­
tion will switc h off
automat ically when a ll of
the following conditions have been met:
- T he veh icle has already been driven.
- T he eng ine has been tu rned off by the Star t-
Stop-System*.
- The driver's door is opened.
- The driver's seat belt is removed.
- The brake pedal is not pressed dow n. -
The vehicle is stationa ry .
In this case, the activated low beam will be re­
placed by the side ma rke r lights. The s ide
marker lights w ill switch off after approxi­
mately 30 minutes or when you lock the vehi ­
cle .
If the Star t-Stop System h as n ot turned off
the engine or if you have sw itched the Start­
Stop system off man ua lly, the ignition will
not
be automatica lly switched off and the engine
will continue to ru n ¢ ,& .
A WARNING
=
Never allow the engine to run in confined
spaces -danger of asphyxiation.
(D Tips
If you shift into the D, Nor S posit ions af­
ter sh ifting into reverse, the vehicle must
be driven faster tha n 6 mph (10 km/h) in
order for the engine to sw itch off again.
Switching the Start-Stop -System on/off
manually
App lies to vehicles: wi th Start-Stop -System
If you do not wish to use the system, you con
switch it off manually.
F ig . 90 Ce nter console: Start-Stop -System button
.,. To swi tch the Start-Stop-Sys tem off/on
manually, p ress the
l(A) ~·I button. The L ED in
the button turns on when the system is
switched off .

(D Tips
If you switch the system off during a stop
phase, the engine will start again auto­
mat ically.
Messages in the instrument cluster
display
App lies to vehicles: with Start -Stop-System
Start-Stop system deactivated: Please re­
start engine manually
This message appears when specific condi­
tions are not met dur ing a stop phase and the
Start-Stop-System will
not be able to restart
the engine.
If the Dor R selector lever posi ­
tions were engaged, P will be selected auto­
matica lly. The engine must be sta rted with
the
! S TAR T ENGINE ST OPI button.
Start-Stop system: System fault! Function
unavailable
There is a malfunct ion in the Start-Stop-Sys­
tem . Dr ive the veh icle to an authorized repair
fac ility for servicing as soon as possible to cor­
r ect the malfunction.
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
your speed exceeds the stored value by ap­ prox imately 3 mph (3 km/h) . An indicator
light . (USA models)/ . (Canada models) in
the instrument cluster display also turns on at
the same time . The indicator light ••
turns off when the speed decreases below the
stored maximum speed.
Sett ing a thresho ld is recommended if you
wou ld like to be reminded when you reach a
cer tain maximum speed. Situations where you
may want to do so include driving in a country
On the road 91
with a general speed limit or if there is a
specified max imum speed for winter tires .
@ Tips
Even though your vehicle is eq uipp ed w ith
a speed warning system, you should 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 I function button> Car systems
cont rol button > Driver assist > 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 ad justed in increments of 5 mph
(10 km/h).
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
~
0
Fig. 91 Contro l le ver with s et bu tto n
Fig. 92 Disp lay: Se lecte d speed

92 On the road
• Pull the lever to position CD ¢ fig . 91 to
switch the system on.
• Drive at the speed you wish to set .
• Press button @to set that speed.
The stored spee d and the ind icator light
[ij;(i)~i~ (US mode ls) ,ii (Canadian mode ls) ap­
pear in the instrument cluster d isplay
¢ fig. 92. The display may vary, depending on
the type of d isplay in your vehicle .
The speed is kept constant via an engine o ut­
p ut adjustment or act ive brake intervention .
A 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 control
should not be used in the city, in stop­
and-go t raff ic, on twist ing roads and
when ro ad conditions are poor (such as
ice , fog, grave l, heavy rain and hydro­
planing) -risk of accident.
- T urn off the cruise control tempor aril y
when entering turn lanes, highway exit lanes or in construction zones.
- Please note tha t inadvertent ly "rest ing"
yo ur foot on the accelerator peda l causes
the cruise control not to brake. This is
because the cr uise control is overridden
by t he driver 's acce lerat ion.
- If a brake system malfunction such as
overheat ing occurs when the cru ise con­
tro l system is sw itched on, the braking
function in the system may be switched
off . The other cruise control functions re­
ma in active as long as t he indicator light
[ij;rn~i~ (US models) Iii.I (Canad ian mod­
els) is on.
(D Tips
The b rake lights illuminate as soon as the
brakes decelerate automat ica lly.
Changing speed
• To increase/decrease the speed in inc re ­
men ts, tap the lever in the
0 10 direction
¢ page 91, fig. 91 .
• To increase/decrease the speed quick ly, hold
the lever in the
0 10 direction until the de ­
sired speed is displayed.
You can also press the accelerator pedal down
to increase yo ur speed, e.g . if you want to
pass someone . The speed you saved earlier
will res ume as soon as you release the acce ler­
ator pedal.
If, however, you exceed your saved speed by
6 mph (10 km/h) for longer than 5 minutes,
the cr uise control w ill turn off temporari ly.
The green symbol
[ij;(l)~i~ (US mode ls) ,ii in
the d isplay is replaced with a white symbol.
T he saved speed remains the same .
Presetting your speed
You can preset your desired speed while the
vehicle is not moving.
• Switch on the ign ition.
• Pull lever into position
CD ¢ page 91,
fig . 91 .
• Press the lever in t he 0 o r 0 direction to
increase or decrease your speed .
• Release t he lever to save that speed .
Th is function makes it possib le, for examp le,
to save the speed you want before dr iv ing on
the highway. Once on the h ighway, act ivate
the cr uise con trol by pulling the leve r toward
CD -
Switching the system off
Temporary deactivation
• Press the brake pe dal , or
• Press the lever into posi tion @(not cl icked
into p lace)
¢ page 91, fig. 91, or
• Drive for longer t han S m in utes at more
than 5 mph (10 km/h) above the stored
speed.

Audi adaptive cruise control and braking guard 97
.. You must also press the b rake 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
fl -Adaptive cruise control is switched on. No
vehicles are detected up ahead . The stored
speed is ma intained.
I -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 automatica lly.
f¥i -Adaptive cruise control is switched on. A
mov ing vehicle up ahead was detected . Your
veh icle remains stopped .
I· When automatic braking is not able to
keep enough distance to a previously detected
mov ing vehicle up ahead, you must take con­
trol and brake
c:::> page 99, Prompt for driver
intervention.
© Display
If adaptive cruise control is not shown in the
d isplay, you can call it up with the multifunc­
tion steering wheel buttons¢
page 24 .
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 dis ­
tance is.
No vehicle -No vehicle ahead was detected.
White vehicle -A vehicle ahead was detected.
Red vehicle -Prompt for the driver to take ac­
tion
c:::> page 99.
Both
arrows o n 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 98
. If the
distance selected is too close or may soon be­
come too close, the arrows move into the red
z one on the sca le .
A WARNING
Improper use of the adaptive cruise con­
trol can cause collisions, other accidents
and serious personal injuries.
- 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), which is the minimum
speed that can be set.
@ 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
App lies to veh icles: w it h A ud i ada ptive c ruise co ntrol
0
f
• 0
Fig. 99 Selector lever: changing the speed
.. To increase or reduce the speed in incre­
ments,
tap the lever up or down.
.,. To increase or reduce the speed q uickly,
hold
the lever up or down until the red LED @
reaches the desired speed
c:::> page 96,
fig. 98.
Follow ing any changes, the new stored speed
will be displayed briefly in the display @
c:::> page 96, fig. 98.

Audi adaptive cruise control and braking guard 99
then maintains the stored distance. If the ve­
hicle ahead accelerates, adaptive cr uise 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 spec ified values.
Depending on the driving situation and the
how the vehicle ahead is driving, the actual
d istance may be more or less than these tar­
get distances.
The various symbols for the time increments
appear briefly in the information line @
¢ page 96, fig. 98 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 interva l of
l 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 interva l 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 interva l 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 interva l of 2.3 seconds .
A WARNING
Following other vehicles too closely in­
creases the risk of collisions and serious
personal injury.
- Setting short distances to the traffic
ahead reduces the time and distance
available to br ing 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 distance
for the traffic, road and
weather conditions.
@ 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
tro l key being used.
Selecting the driving mode
Applies to vehicles: with Aud i adapt ive c ruise contro l
.,. Select the desired driving mode in drive se­
lect¢
page 110.
(0 Tips
Your settings are automat ica lly stored and
assigned to the remote control key being
used.
Prompt for driver intervention
Applies to vehicles: with Audi adapt ive cru ise contro l
Fig. 102 Instrument cluster: request fo r drive r in ter­
vent ion
In certa in situations, the system will prompt
you to take action . Th is could happen, for ex­
amp le, if braking by the adaptive cruise con­
trol system is not enough to maintain enough
distance to the vehicle ahead.
The indicator light
I and the symbol in the
display will warn you about the situation
¢ fig. 102. You will also hea r an acoustic sig­
nal.
- Press the brake pedal to slow your vehicle
down.

Audi lane assist Lane assist
De script ion
App lies to vehicles: with la ne ass ist
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 marking the lane is detected on
at least one s ide of the vehicle.
The system will not warn you before crossing
a lane marker line if you have activated the
turn signal. In th is case, it assumes that you
are changing lanes intent ionally.
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) o r more .
_& WARNING
-Lane assist will not keep your veh icle in
your lane. The system only warns the
driver w hen the veh icle 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 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 ca use lane
assist to fa il to detec t boundary li nes.
-
Audi lane a ssis t 10 3
Act ivating and deactivating
App lies to vehicles: wit h lane assist
Fig. 104 Turn s igna l lever: Lane assist button
Fig . 105 Windsh ield: Lane assist ca mera view ing win ­
dow
"' Press the Q fig . 104 button to activate or
deactivate the system. The. or. indica­
tor l ight in the instrument cluster will il lu­
m inate or go out .
Instrument cluster ind icator light
• Read y:
The green indicator light shows
that the system is ready to use. The system
can now war n you if you are about to c ross a
known lane marker line.
• Not ready : The yellow indicator light
shows that the system is t urned on but unable
to send a warning. This can be due to the fol­ low ing:
- 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 obstructed by
snow, di rt, 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) .

Setting the warning point and steering
wheel vibration
Appl ies to vehicles: with lane assist
You can adjust individual settings in the MMI.
.. Select : I CARI funct ion button > Car systems
control button > Driver assist> Audi lane
assist .
Setting the warning point Early :
With this setting, a warning is provided
before a wheel touches the detected lane
boundary line. The warning depends on the
angle in which the ve hicle is approaching the
line. The distance at which the warning is giv­
e n increases as the angle becomes sharper. If
you dr ive toward a boundary line at a very
sha rp angle, the warning will come just before
a w heel touches the line.
Medium : With this sett ing, the warning point
i s adapted to the cou rse of the road, the lane
width and the speed . You wi ll st ill be warned
if you cross slightly over a dotted line when
driving on curves.
Late: This setting has the same properties as
medium. You will only be warned once a
wheel crosses a detected line.
Setting the steering wheel vibration
The steering wheel v ibration can be set to
Low , Medium or Strong . Selecting each of the
set tings will cause the steering wheel to vi­
brate so you can ch eck the strength of the vi­
bration in that setting.
@ Tips
Your settings are automatically stored and
assigned to the remote contro l key be ing
used.
Audi lane assist 105

110 Audi drive select
Audi drive select
Driving settings
Introduction
Aud i d rive select mak es it possible to expe ri­
ence diffe ren t types of vehi cle se ttin gs i n o ne
ve hicl e. The dr ive r can se lect th ree
Comfort ,
Auto
and Dynamic modes in the M MI to
switch between a sporty and a comforta ble
driving mo de.
You c an a lso a djust the setti ng according to
your p re ferences in the
individual mo de. For
examp le, you ca n combine settings such as a
sporty en gine t uning with comfortab le steer­
ing.
A WARNING
Improper use of the A udi drive select can
cause collisions, ot her acc idents and se ri­
ous pe rsonal injury.
Description
The vehicle setup in each mode depends on
the veh icl e's featu res. The engine, t ransm is­
sion, stee ring, reve rsible sa fe ty belt tension­
e rs a nd adap tive air su spension are alw ays in­
volved.
Engine and transmission
Depending on the mode, the e ng ine and the
tra nsmission respond quic ker or i n a more bal­
an ced manne r to acce le rator pedal move­
men ts. In the sporty dyn ami c mode, the
tra nsmission sh ifts at highe r RP Ms.
Air suspension
The adaptive air suspens ion/adaptive air sus­
pe nsion spor t*
(Air suspension in the MM I) is
an elec tronic ally con trolled air suspensio n and
da mpi ng sys tem. They are adjus ted depend­
ing on the se lected driving mode, the drive r's
steering, braking and acceleration input and
the road s urface, ve hicle speed and load. A
sporty setting is generally used i n ve hicles
with adaptive air suspension sport*. T
he vehicle clea rance varies depending on the
se lected mo de an d the speed .
T he highw ay setting is activate d automatically
whe n you dr ive above 7 5 mph (120 km/ h) for
more than
3 0 seconds in the auto or dynamic
mode. The gro und clea rance is increased a uto ­
matically if the speed drops below
44 mph
(70 km/h) for more than 120 seconds.
Steering
T he s teering adap ts i n t erms of s teer ing effor t
and stee ring ratios . Indirect stee ring that
moves easily, like the steer ing in comfo rt
mode, is best suited to long drives on a high­
way. In contrast, dynamic mode provides
sporty, direct steer ing .
The following app lies to vehi cles with dynamic
stee ring* : the steer ing rat io changes based on
vehicle speed in order to ma inta in optimum
steering effort for the drive r at all times. This
sets the stee ring to be less sens itive at h igher
s p eeds in order to provide improved vehicl e
control. At r educed speeds, howeve r, steer ing
is mo re dir ect i n order to keep the stee ring ef­
f o rt as minima l as po ssible when the drive r is
mane uveri ng the veh icle. At low and average
speeds, dynamic steering ad dit iona lly pro ­
vides more responsive steering pe rformance .
Sport differential*
As a compone nt o f the all whee l dr ive system
(quat tro)
r:!> page 204, the Spor t differen tia l*
dis tributes t he d riving power to the rear ax le
depen ding on the sit uat io n. The distrib ution
of power var ies depending on the se lected
mode, from ba lanced (comfort) to agile (dy­
nam ic). The goal is a high level of agility and
ability to accelerate on curves . The vehicle is
very res pons ive to stee ring .
Curve light*
The curve light adapts to driving on curves.
The pivoting act ion and the lighting are also
adapted to the mode.
Adaptive cruise control*
T he be hav ior when ac celera ting can be adjust­
ed from comforta ble to sporty, de pending on ..,.