2010 AUDI S8 cruise control

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& WARNING (continued)
slow your veh icle safely. If clos ing speed is too high , you must
apply the brake s your self to reduc e the ri sk of a rear-end cra sh .
• Never re st you r foot on the accelerator pedal , especially when
the Adaptive Cruise Control is being used. Pressure on the acceler­
ato r will override the ACC braking function and prevent the brakes
from being applied when ACC detects a situation when the brakes
must be applied.
• Never use Adaptive Cruise Control when you cannot drive safely
at a steady speed, including on city st reets , on winding roads or
when road conditions are poor (for example , on ice, gravel , in fog,
heavy rain or on wet roads that increase the ris k of hydroplaning ).
• The radar sensor's
vision can be reduc ed by rain, snow and
heavy road spray . These and similar conditions can prevent vehi ­
cle s up ahead from being accurately detected and in some cases
they may not be detected at all . Do not use ACC when the radar
sen sors cannot ac curately detect vehicles moving ahead of you in
traffic .
• Alway s turn off Adaptive Crui se Control when entering turn
lanes , exit lanes and construction zones o r in similar situat ions
because the vehicle will automatically ac celerate to the stored
speed when the road ahead is clear .
• To prevent unintended operation , always switch ACC off when
it is not being used .
[ i] Tips
• For safety reasons, the stored speed is deleted when the ignition
i s turned o ff.
• When Adapt ive Cruise Control is switched on, the Electronic Stabi­
li zation Program ( ESP) is also automa tica lly activ ated.
• Damage caused by accidents and some minor collisions can affect
th e rad ar senso r se ttings and ca use the syste m to m alfunction o r
switch off completely.
Controls and equip ­
ment Safety first
•
In winter conditions, you should check the radar sensor cover
be fore drivi ng to m ake su re it is free of i ce and s now. If ne cessa ry,
clean the area near the radar sensor carefully=>
page 128, fig. 138 .
• T o ensure th at the radar sensor is not blo cked, fore ign objects
(e .g . stickers, larger license plate mo unts, add-on parts) mus t not
c ove r th e ar ea ne ar the ra dar sensor =>
page 12 8, fi g. 13 8. T he area
near the radar sensor must not be painted, e ither.
• F or Declar ation o f Compliance to United Sta tes FCC and I ndus try
Canada regulations=>
page 364 . •
App lies to vehicles: with Adapt ive Cru is e Co ntr ol
How does Adaptive Cruise Control work?
Vehicl es traveling ahead are d etected with th e aid of the
radar sensor.
Fig. 139 Radar sen sor
m easur em ent range
Adaptive C ruise Con trol uses a radar se nsor in t he front o f the vehi cle
=> fig . 139 . The system has limitations=>
page 139. Things that are
not moving in your lane and in yo ur direction o f travel will no t be
detected . The sensor measures the distance to reflective su rfaces
that m ust have a certain s ize. The system responds only after the
distance measu remen t has been made . If a measurement is not
poss ible, the system cannot res pond and w ill not react to a vehicle or
s o me thing el se up ah ead. .,_
Vehicle care Technical data

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Vehicles moving in your direction can be detected up to a distance of
about 140 yards (130 meters) but the Adaptive Cruise Control cannot
detect vehicles that are stopped or stalled, obstacles that do not
move or narrow vehicles like motorcycles and bicycles .
Open road
When the road is clear, Adaptive Cruise Contro l works like cruise
control. It maintains a constant target speed specified by the driver.
Driving in traffic
If a slower vehicle driving ahead is detected, the Adaptive Cruise
Control decelerates (within the limits of the system) =>
page 139 to
its speed and after adjusting, tries to maintain the set distance from
the vehicle ahead. The vehicle may temporarily drive slower than the
set speed while adjusting=>
& in ''Description " on page 128 .
If the vehicle in front accelerates, Adaptive Cruise Control a lso acce l­
erates up to the speed that you have set.
Situations requiring driver intervention
In some situat ions you will have to use the foot brake and slow the
vehicle down in order to keep a safe distance from vehicle in front of
you or to avoid a rear-end co llision . In this situation, a symbo l
appears and a warning tone sounds =>
page 135.
Passing another vehicle
If you move into the passing lane and no vehicle is detected ahead,
Adaptive Cruise Contro l accelerates to the speed you have set and
maintains it.
Overriding ACC
You can increase your speed at any time by stepping on the acceler­
ator pedal. After you release the accelerator pedal, the system
adjusts back down to the speed you previously set.
& WARNING
• Never rely on the distance control feature of ACC alone to
prevent rear-end collisions . Always be prepared to brake and take
evasive action to avoid collisions and other accident situations.
• Never allow the closing speed between you and other vehicles
to be so high that the Adaptive Cruise Control may not be able to
slow your vehicle safely. If closing speed is too high, you must
apply the brakes yourself to reduce the risk of a rear-end crash.
(I] Tips
Please note that the amount of acceleration the Adapt ive Cru ise
Control uses depends on the Distance setting selected. DISTANCE 1
gives you acceleration that is dynam ic and sporty. DISTANCE 4, on the
other hand, gives more moderate acce leration. For more information
about the time intervals =>
page 133, "Ho w is the distance set?". •
Applies t o ve hicles: w ith Ad ap tiv e Cr uise Contr ol
Switching the system on and off
Switching the system on
-Pull the lever to position (D.
"' "' M ~ w
" m
Fig. 140 Control
lever: Switching on
and off

Adaptive Cruise Control -____________ ___,__ __ ____.
Switching the system off
-Press the lever to position@ (latched). •
Applies to v ehi cle s: w ith Ad ap tiv e Cruis e Cont ro l
How is the speed stored?
Fig . 141 Control
leve r: Stor in g spee d
With the system sw itched on the speed is stored as follows:
- Drive at the speed you want. The speed must be between
20 and 95 mph (30 and 150 km/h) .
- Press the SET button to store the desired speed .
After the [SE TI button is released, the current speed is stored and
ma intained .
The ins trument clus ter displ ay show s the stored speed wi th a red
ind icator light~
page 135.
(I] Tips
For safety reasons, the stored speed is erased when the ig nit ion or
the ACC is turned off .•
Con tro ls a nd e quip ­
m en t Vehicle
OP-eration
Applies to vehicles : w ith A dapt ive Cruise Cont rol
Changing stored speed
Speed can be changed without touching the accelerator
or brake pedal .
Increasing speed
...
"' M
w .., a,
Fig. 142 Con tro l
lever: Chan ging spee d
-Press the lever briefl y upwards G). USA models: Speed
increases by about 2.5 mph. Canada models: speed will
increase by one mark on the speedometer scale.
- Press the lever upwards
0 and hold it. As long as you hold
the lever up, the light diode display in the speedometer
LED display moves forward and the speed is increased .
Reducing speed
-Press the lever briefly downwards Q. Speed decreases by
2.5 mph. Canada models: speed will decrease by one mark
on the speedometer scale.
- Press the lever downwards
O and hold it. As long as you
hold the lever down, the light diode display in the speed­
ometer LED display moves backward and the speed is reduced .
~
Vehicle care Do-it-yourselt service iTechnical data

Ill Adaptive Cruise Control ..__..,____ _____________ _
After re leasing the co ntrol switc h, the system regu lates t he speed to
t he val ue jus t set.
& WARNING
Improper use of the Adaptive Cruise Control features and inatten­
tion can lead to an accident causing serious personal injury .
• It is dangerous to use the "RESUME " feature when the previ­
ously set speed is too high for e xisting road , traffic or weather
conditions.
• Always read and heed the information and WARNINGS=>
& in
" Description " on
page 128.
(I) Tips
You c an in crease y our spee d at a ny tim e by st ep ping on the acceler ­
ator peda l. After you release the accelerator peda l, the system auto­
mat ically adjusts b ack dow n to the spee d you prev iousl y set. A new
desi red speed can be stored at any time by pressing the [ SE TI but ton
=> p age 13 1, fig. 141. •
Appli es to veh icles : w ith Adapt ive C ruise Co ntrol
Turning Adaptive Cruise Control off
temporarily
In some si tuations i t ma kes sense to turn Ada ptive Cruise
Co ntr ol off te m po rari ly.
Turning control off temporarily
- Step on t he b rake peda l or
Fig. 143 Control
le ver: Turni ng Adap·
tive Crui se Control off
temp orarily
-Press the cont rol le ve r in t he dir ection of th e arrow @(n ot
la tc h ed)
=> fi g. 14 3.
Reactivating control
- To res ume t he store d sp eed , release t he b rak e ped al and
p ress t he cont ro l lever i n th e dire ctio n of the arrow
(D .
& WARNING
Improper use of the Adaptive Cruise Control can cause collisions ,
other accidents and serious personal injuries.
• Never resume the stored speed if the speed is too high for
prevailing road, traffic or weather condition s. ..,

Adaptive Cruise Control IJI ____________ ___,__ __ ____.
(]] Tips
When the system is turned off temporari ly, the speed set at that time
is stored. •
Applies to vehicles : with Adaptive Cruise Control
How is the distance set ?
Distance can be set in four stages.
Increasing distance
Fig. 144 Control
l ever: Sett ing d ist ance
- Push the slider switch once to the right G):::> fig . 144 . The
distance currently set is shown for 3 seconds in the instru­
me nt cluster display .
- Push the slider switc h
again to the right G), to increase
the d is tance by one step.
Reducing distance
- Push t he s lider switch once to the left Q . The distance
current ly set is shown for 3 seconds in the in strument
cl uster display.
- Push the slider switch
again to the left 0, to decrease the
distance by one step .
Contro ls a nd e quip ­
m en t Vehicle
OP-eration
The distance a t which Adaptive C ruise Co ntro l fo llows a vehi cle in
front is determ ined by
time intervals. A time interva l to a vehicle in
front is established and main tained. This produces a speed-depen ­
den t interval. The higher the speed, the greater the safety interval in
feet (meters) .
For example, if the interval
DISTANCE 3 i s set, a vehicle in front is
followed at a
time interval of 1.8 seconds.
For a speed of
50 mph (80 km /h ) this woul d be eq uivalent to a
distance of
131 feet (40 meters ) to the vehicle in front.
The distances given here are nominal va lues. The vehicle speed may
exceed o r fall short of these target speeds, depending on the driving
situation and the driving style of the vehicle ahead . .,
Vehicle care Do-it-yourselt service iTechnical data

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DISTANCE 1
Symbol ~-~---
Time interval 1 second
Dynamics Sporting
Distance at 25 mph (40 km/h ) 36 Feet (11 Meters)
Distance at SO mph (80 km /h ) 72 Feet (22 Meters)
Distance at 75 mph (120 km /h) 108 Feet (33 Meters)
& WARNING
Following other vehicles too closely increase s the risk of a crash
and ser ious personal injury.
• Following other vehicles too closely, particularly at higher
speeds inc reases the r isk of collisions and serious personal injury.
• Setting short distances to the traffic ahead redu ce s the time
and d istance available to br ing your vehicle to a safe stop and
make s it even more ne ce ss ary to pay clo se attention to traffi c.
• Always select a speed and distance to traffic ahead that is safe
and appropriate under the prevailing traffi c, road, weather and
lighting cond itions.
• Never rely on the distance control feature of ACC alone to
prevent rear -end collisions . Always be prepared to b rake and take
ev asive action to avoid collisions and other accident situ ations .
• Never allow the closing speed between you and other vehicles
to be so high that the Adaptive Cruise Contr ol may not be able to
slow your vehicle safely . If closing speed is too high , you must
apply the brake s yourself to reduce the ri sk of a rear -end cra sh.
• Always select a g reate r following di stance to the vehicle ahead
on wet road s than on dry road s.
• Always read and heed the information and WARNINGS~
& in
" Description " on
page 128 .
DISTANCE 2 DISTANCE 3 DISTANCE 4
c::::::> __ c::::::> __ ~---~- ~----~
1.3 seconds 1.8 seconds 2.3 seconds
Standard Standard Comfortable
46 Feet ( 14 Meters) 66 Feet (20 Meters) 82 Feet (25 Meters)
95 Feet (29 Meters) 131 Feet (40 Meters) 167 Feet (51 Meters) 197 Feet (60 Meters) 249 Feet (76 Meters)
[ i ] Tips
• Distance can be adjusted us ing the slider sw itch on the leve r and
throug h Adaptive Crui se Control in the M MI menu~
page 138. The
sett ings in the MMI menu are sto red automatically and allocated to
t he remote cont ro l key .
• If the distance was not set in the MMI menu Adapt ive Cruise
Control , it is reset to the factory sett ing DISTANCE 3 when the ign i­
tion is turned on. •

--------------------------------------------=A~ d:..: a=. p !::...: t~iv .:.. e =-- C=-=- r=u :.:.is =-:: e_C=.:: o:.:n..:. t.:: r:..: o:::.:. L _..J_
Driver information
Applies to veh icles: with A daptive C ruise Cont ro l
Displays in the instrument cluster
Depending on the driving situation, driver information is
displayed in the instrument cluster .
@ Primary d isp lay in the speedometer .
Fig. 145 O vervi ew
in strume nt clu ster
@ Supplementary display in the instrument cluster .
© Message in the instrument cluster d isp lay.
@ Primary display
Important information concerning vehicle operation with Adaptive
C rui se Con trol i s shown in display area @ . T he desired speed you set
is highlighted in the speedometer and the warning lights show
whet her adjustments are being made for an object ahe ad.
T hi s information is always displayed. Display area@ is the refore
called the
primary di splay.
@ Supplementary display
In d isp lay area @ information from the navigation system a nd the
trip computer is displayed in addit ion to information about Adapt ive
Cru ise Control.
Con tro ls a nd e quip ·
m en t Vehicle
OP-eration
You can select among the different information by repeated brief
ta ps o n the R ES ET button on the windshield wiper lever =>
page 38,
"Operatio n".
Particularly on your first trips with Adaptive Cruise Control, the
s upplementar y display should be tur ned on .
© Message
The information in a rea © is not displayed permanently . Informat ion
is displayed on ly if you c hange the time interval, if there is a malfunc ­
tion or if the Adapt ive Cru ise Contro l is turned off .•
A p plies to v ehicles : wi th Adaptive C ru ise Cont ro l
Primary display in the speedometer
Desired speed
Fi g. 14 6 Pr im ary
d is p lay
i n the spe ed ·
o m et er
Th e desi red speed set by the d river is displayed wi th a red L ED .
T he system a llows only speeds from 20 to 95 mph (30 to 150 km/h)
to be set . This speed range is faint ly illumina ted in the speedometer.
Warning lights (symbols)
• ""c::;, Open road: T he wa rning lig ht ""c::;, shows that AC C is active
and that no moving vehicle has been detected with in range of the
ra dar senso r up ahead in your lane of travel. The set speed is main-
tained . _,,,
Vehicle care Do-it-yourselt service iTechnical data

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• -0,11,c::::, Driving in tr affic: The warning light c:::::,11 .. -::::::, shows that a
vehicle moving in yo ur lane of travel h as been de tecte d up fron t in
your lane o f travel. Your speed is adjusted accord ing to the speed of
the vehicle up front. ACC accelerates an d brakes automat ically within
the system's capabil ities .
• -011 ,,-0 Request for driver to assume control : The re d flashing
warning light
c:::::, 11 .. c::::, means Request for driver to assume control.
Yo u as the driver must slow the vehicle with the foot brake . T he
symbo l
-::::::,11,, c::::, t el ls you that the Adapt ive Cr uise Contro l is not able
to slow the vehicle down e nough to keep a enoug h distance to the
vehicle in front of you. A wa rning to ne signa l will a lso sound w hen the
symbol appears .
& WARNING
Improper use of the Adaptive Cruise Control features and inatten­
tion can lead to an crash and serious personal injury.
• Never allow the closing speed between you and other vehicles
to be so high that the Adaptive Cruise Control may not be able to
slow your vehicle safely. If closing speed is too high , you must
apply the brakes yourself to reduce th e risk of a rear-end crash.
• Always sele ct a greater following di stance to the vehicle up
ah ead on w et roads than on dry roads.
• Always read and heed the information and WARNINGS~
& in
" Description " on
page 128.
[ i J Tips
• If the Adapt ive Cruise Control in itiates braking, the hydraulic
bra ke system is under pressure . Therefore, t he b rake pedal distance
is shorter and the pedal feels "harde r" .
• If yo u use the acceler ator to go f aster th an the speed o f the
vehicle ahead of yo u, the d river intervention prompt will not be
accompanied by a warning to ne.
• If the speed you previously set is exceeded, t he indicato r light in
t he speedomete r will sw itch o ff. •
A ppli es to veh icles : w ith Adaptive Cruise Co ntrol
Display in the instrument cluster
You should hav e the supplementary information
displayed here, p articularly on your first trips .
Fig. 147 Displ ay i n
t he in strument clu ste r
Scr oll throug h the av ail able inform ation dis plays by br ie fl y t appi ng
the (RESE T) button at the end of the windshield w iper lever . You can
sele ct a nd information from the trip comp ute r, navigation sys tem or
Adaptiv e Cr uise Control.
© Vehicle sy mbol
® St atu s
© Distan ce
© Vehicle symbol
Th e veh icle symbol indicates whe ther the sy stem has de te cted a
moving veh icle up front in your lane of travel.
• When no moving ve hicle is detected up fro nt, only the
outline of
the vehicle
is d isp laye d.
• A
gray vehicle wi ll appear when a moving vehicle is de tected up
ahead .
• A
red vehicle will appea r if th e s itua tio n de te cted will s oo n l ead to
a requ est for the driver to assume contro l. .._