2010 AUDI S8 Owners Manual

_________________________________________________ O_ n_t_ h _ e_ ro_ a_d __ ffllll
& WARNING (continued)
• Please note that inadvertently "resting" your foot on the accel­
erator pedal causes the cruise control not to brake. This is because
the cruise control is overridden by the driver's acceleration.
[ i] Tips
The brake lights illuminate as soon as the brakes decelerate automatically. •
Changing speed
-Press lever in the
0 or O direction=> page 126, fig. 136
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 pressing the
lever. If you keep the lever pressed down, you will alter your speed in
S 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 accelerator pedal.
If, however, you exceed your saved speed by S mph (10 km/h) for
longer than S minutes, the cruise control will turn off temporarily .
The green symbol in the display~
page 126, fig. 13 7 is replaced with
a white symbol. The saved speed remains the same.•
Presetting your speed
You can preset your desired speed while the vehicle is not
moving .
-Turn on the ignition.
Controls and equip ­
ment Safety first
- Pull lever
into position ©=> page 126, fig. 136.
- Press the lever in the
0 or O direction to increase or
decrease your speed.
- Release the lever to save that speed .
This function makes it possible, for example, to save the speed you
want before driving on the highway. Once on the highway, activate
the cruise control by pulling the lever toward
(D . •
Switching the system off
Temporary deactivation
- Press the brake pedal, or
- Press the lever into position@ (not clicked into place)
=> page 126, fig. 136, or
- Drive for longer than 5 minutes at more than 5 mph
(10 km/h) above the stored speed.
Switching off completely
- Press lever into position @ (clicked into place), or
- Switch the ignition off .
The system retains the saved speed if you deactivate the cruise
control temporarily. To resume the saved speed, release the brake
pedal and pull the lever to position
(D.
Switching the ignition off erases the saved speed.
& WARNING
You should only return to the saved speed if it is not too fast for
the current traffic conditions -risk of an accident! •
Vehicle care Technical data

"" Adaptive Cruise Control .._ _ ____:.. ___ __::_....::...:;..:...:....:.:-=...:.. ____________________________ _
Adaptive Cruise Control
Speed and distance control system
Applies to veh icles : w it h Adap tive Cru ise Cont ro l
Description
Th e Adaptiv e Cruis e Control driver a ssistanc e program is
a co mbine d speed and d istan ce contr ol s ys tem.
Fig . 138 Front
bumper: Po sition of
rada r sensor
Adaptive Cru ise Cont rol can h elp ma ke driving mo re relaxed and less
t iri ng , par ticularly d uring lon g trips on i nte rs t a tes o r oth er hig hways
that a re generally st raig ht.
Set ACC to maintain a constan t, lega l travel spee d between 20 and 95
m ph (3 0 · 150 k m/h) t hat is approp riat e f or preva iling traf fic co ndi­
tions. Select a following distance to t he ve hicle ahead and ACC w ill
adjus t your speed to maintai n that d istance.
Adaptive Cruise Control has technica l limitations that you must k now,
so p le a se read this sectio n carefully, understa nd how the sy stem
works and use it p ro p erly at all ti mes.
How does it work?
You ca n op erate the Adaptive Cruise Control usi ng the lever on the
s teer ing wheel column ~
page 13 1, " H ow is the speed sto red?" and
~ page 133, " H ow is the distance set?" .
Driver information
Important information is bro ught up in the s peedometer and in the
i nst rumen t clust er displa y as the ve hicl e is be ing drive n~
pa ge 135,
"Driver informat io n".
What is important for you to know
T here are limits to what Adaptive Cr uise Contro l can do as the vehicle
is being drive n~
page 139 , "Sys tem lim itations".
& WARNING
Improper use of the Adaptive Cruise Control can cause collisions,
other accidents and serious personal injury.
• Always remember that the Adaptive Cruise Control has limits -
it will not slow the vehicle down or maintain the set distance when
you drive towards an obstacle or something on or near the road
that is not moving, such as vehicles stopped in a traffic jam , a
stalled or disabled vehicle.
• Always remember that the Adaptive Cruise Control cannot
detect a vehicle that is driving towards you in your traffic lane and
that it cannot detect nar row vehicles such as motorcycles and bicy­
cles.
• Never drive at speeds that are too fast for traffic, road and
weather conditions.
• The Adaptive Cruise Control cannot slow
or brake the vehicle
safely when you follow another vehicle too closely. Always
remember that the Adaptive Cruise Control has a braking power
that is only about 30% of the vehicle 's maximum braking ability .
Always be prepared to brake and take ev asive action to avoid colli·
sions and other accident situations.
• Never allow the closing speed between you and other vehicles
to be so high that the Adaptive Crui se Control may not be able to .,

__________________________________________ A_ d_ a_,_ p_t _iv _ e_C_ r_u _i _ s _e _C_ o_n_ t_ r_ o_ l __ _
& 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

1111....__A_ d_ a_,_ p_t _i_ v _e _ C_r_ u_ i_ s_ e_ C_ o_ n_ t_ r_ o_ l __________________________________________ _
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

1111....__A_ d_ a_,_ p_t _i_ v _e _ C_r_ u_ i_ s_ e_ C_ o_ n_ t_ r_ o_ l __________________________________________ _
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. •