warning AUDI A8 2013 Manual PDF

88 On the road
switched on during this stop phase. The en ­
gine will be automatically restarted when
needed.
The last Sta rt-Stop -System setti ng (on/off us­
ing the button
l(A) ,.,I) wi ll be restored when the
ignition is turned on. The LED in the
l(A) "'I but­
ton turns on when the Start-Stop -System is
switched off manua lly.
Basic requirements for the Start-Stop
mode
- The driver's door is closed .
- The driver' seat be lt is latc hed.
- T he hood is closed.
- T he veh icle must have been driven faster
than 2.5 mph (4 km/h) since the last stop.
- A trai ler is not hitched to the vehicle.
A WARNING
-Never let the vehicle roll with the engine
switched off. You could lose cont rol over
the vehicle . This can lead to a coll ision
and serious injuries .
- Th e brake booster and the steer ing sup­
port do not work while the eng ine is
switched off. More force is required to
stop and to steer the vehicle.
- To reduce the risk of injuries, make sure
that the Start-Stop-System is turned off
when working in the engine compart­
ment¢
page 89.
(D Note
Always switch off the Start-Stop -System
when driv ing th rough water~
page 89.
Starting/stopping the engine
Applies to vehicles: w ith Start -Stop -System
Fig. 88 Instrument clus ter: engine sw itche d off (s top
phase)
.. Slow the veh icle to a stop using the brake
and keep pressing the brake pedal. The en­
g in e will sw itch off. The
D] indicator light
appears in the information line in the instru­
ment cluster display.
.. When you take your foot off the brake ped ­
al, the engine restarts. The indicator light
turns off.
Additional information
The engine will switch off in the P, D, N and S
positions as well as in manual mode . In the P
pos ition, the engine wi ll also remain off if you
take yo ur foot off the brake pedal. The engine
starts again when you select another selector lever position and take your foot off the brake
pedal.
If you select the R position during a Stop
phase, the engine will start again.
Shift from D to P quickly to prevent the engine
from starting un intentionally when sh ifting
through R.
You can determine for yourself if the engine
will stop or not by reducing or increasin g the
amount of force you use to press the brake
pedal. For example, if you only lightly press
on the brake pedal in stop-and and-go traffic
or when turning, the engine will not switch off
when the veh icle is stationary. As soon as you
press the brake down ha rder, the engine wi ll
swit ch off. ..,

90 On the road
Messages in the instrument cluster
display
Applies to vehicles: with S ta rt-Stop-System
Start-S top sy stem de activated: Pl ea se re­
s ta rt engine manually
This message appears when specific condi­
tions are not met dur ing a stop phase and t he
Start -Stop -System will
not be ab le to restart
the engine.
If the D or R se lector lever posi­
t ions were engaged,
P will be selected auto ­
m atica lly. The engine must be started with
the
! START ENGIN E STOPI button .
Start-Stop system : Sy stem fault! Function
un available
There is a malfunc tion in the Sta rt-Stop-Sys­
tem . Dr ive the vehicle to an au thorized repair
fac ility for servicing as soon as possible to cor­
rect 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 warn ing tone when
your speed exceeds the stored value by ap­
p rox imately 3 mph (3 km/h) . An indicato r
l ig ht . (USA models)/ . (Canada mode ls) i n
the ins trumen t clus ter display also t urns on at
the same time . The ind icator light
a;m
turns off when the speed decreases below the
stored maximum speed.
Se tting a thresho ld is re commended if yo u
wo uld like to be reminded when you reach a
certain maximum speed. Situations where you may want to do so include driv ing in a country
with a general speed Limit or if there is a
specified max imum speed for winter tires .
@ Tips
Even though your vehicle is equipped with
a speed warning system, you should st ill watch the speedome
ter to ma ke s ure you
are not dr iving faster than the speed limit .
Setting the threshold
You can set, chang e and delet e the threshold
in the MMI.
• Select: I CAR I func tion button > Car sy stem s
contro l but to n > Driver a ssist > Speed warn­
ing .
You can set any threshold betwee n 20 mph
(30 km/h) and 150 mph (2 40 km/h). Se tting s
can each be adj usted in incremen ts of
5 mph
(10 km/h).
Cruise control
Switching on
The cruise con trol sys tem makes it possible to
drive at a constant speed starting at 20 mph (30 km/h) .
Fig. 91 Contro l leve r wit h set b utton
Fi g. 92 D isp lay : Se lecte d sp ee d
• Pull the lever to position@~ fig. 91 to
s w itch the system on.
• Dr ive at the speed you w is h to set .
.,. Press button @to set that speed.

The stored speed and the indicator light
A;(l)~i4 (US mode ls) 8 (Canad ian mode ls) ap­
pear in the instrument cluster d isp lay
¢ fig. 92. The display may vary, depending on
t he type of d isplay in your vehicle.
The speed is k ept constant via an engine out­
put 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 traff ic, on twisting roads and
when road conditions are poor (such as
ice, fog, grave l, heavy rain and hydro ­
planing) -risk of accident .
- Turn off the cruise control temporari ly
when entering turn lanes, highway exit lanes or in construction zones.
- Please note that inadvertently "rest ing "
yo ur foot on the accelerator peda l causes
the cruise control not to brake. This is
because the cruise control is overridden
by the driver's acce leration.
- If a brake system malfunction such as
overheating occurs when the cruise con­
trol system is sw itched on, the braking
function in the system may be switched
off. The other cruise control functions re­
main active as long as the indicator light
[~jlQ~i4 (US models) I ii (Canad ian mod­
els) is on.
The brake lights illuminate as soon as the brakes decelerate automat ically .
Changing speed
" To increase/dec rease the speed in incre­
ments , tap the lever in the
0 10 d irection
¢ page 90, fig. 91 .
On the ro ad 91
" To increase/decrease the speed quick ly,
hold the lever in the
0 10 direction until
the desired speed is displayed.
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 accele r­
ator pedal.
If, however, you exceed your saved speed by
6 mph (10 km/h) for longer than S minutes,
the cruise contro l wi ll turn off temporari ly.
The green symbol
A;(l )~i4 (US models) 8 i n
the d isplay 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 .
" Switch on the ignition.
" Pull lever into posit ion
(D ¢ page 90,
fig . 91 .
" Press the lever in the 0 or 0 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 dr iving on
the h ighway. Once on the highway, act ivate
the cru ise con trol by pulling the lever toward
(D .
Switching the system off
T e mpor ary dea ctivat ion
" Press the brake pedal , or
" Press the lever into position @(not clicked
into place)
¢ page 90, fig. 91 , or
" Drive for longer than 5 minutes at more
than 5 mph (10 km/h) above the stored
speed.
S w itching off complet ely
" Press lever into position @(clicked into
place), or
" Switch the ignition off .

92 On the road
The system retains the saved speed if you de ­
activate the cr uise contro l tempo rari ly. To re­
sume the saved speed, release the b rake pe d­
a l and pull the lever to position @.
Sw itching the ign ition
o ff e rases the saved
speed.
A WARNING
Yo u should only return to t he saved speed
if it is not too fast for t he current traffic
conditions - risk of an accident!

Audi adapt ive crui se c ontrol an d bra kin g guard 9 3
Audi adaptive cruise
control and braking
guard
Introduction
App lies to vehicles: with Audi adaptive cruise control
The adaptive cruise control system assists the
driver by regu lating vehicle speed and helping
to maintain a set distance to the vehicle
ahead, within the limits of the system . If the
system detects a moving vehicle up ahead,
adaptive cruise control can brake and then ac­
celerate your vehicle. This helps to make driv­
ing more comfortable both on long highway
stretches and in stop-and-go traffic.
The braking guard system can warn you about
an impending collision and initiate braking
maneuvers ¢
page 99.
Adaptive cruise control and braking guard
have technical limitations that you must
know, so please read this section carefully, un­
derstand how the system works and use them
properly at all times.
General information
General information
Applies to vehicles: with Audi adaptive cruise control
Fig. 93 Front of the vehicle: sensors and video came ra
The areas that contain the radar and ultrason ­
ic sensors and the v ideo camera ¢
fig. 93
must neve r be covered by stickers or other ob­
jects or obstructed with dirt, insects, snow or
ice that will interfere with the adaptive cruise
control system and braking guard. For infor­
mation on cleaning, refer to ¢
page 218. The same applies for any modifications made in
the front area.
T he function of the adaptive cru ise contro l
system and braking guard is limited under
some conditions:
- Objects can on ly be detected when they are
w ith in sensor range
¢page 95, fig. 96 .
-The system has a limited ability to detect
objects that are a shor t distance ahead,
off
t o the side of your vehicle or moving into
your lane.
- Some kinds of ve hicles are hard to detect;
for examp le motorcycles, vehicles with high
ground clearance or overhanging loads may
be detected when it is too late or they may
not be detected at all.
- When driving through curves
¢page 94 .
- Stationary objects¢ page 94.
& WARNING
Always pay attent ion to traffic when adap ­
tive cruise control is switched on and brak­ ing g uard is active. As the driver, you are
still respons ible for starting and for ma in­
taining speed and distance to other ob­
jects . Braking guard is used to assist you .
The driver must always take action to avo id
a collision. The driver is always responsible
for braking at the co rrect time.
- Improper use of adaptive cru ise control
can cause collisions, other acc idents and
serious pe rsonal in jury.
- Never let the comfort and conven ience
that adaptive cruise control and braking
guard offer d istract you from the need to
be alert to traffic condit ions and the
need to rema in in full control of your ve­
hicle at all times,
- Always remember that the adaptive
cruise control and braking guard have
limits -they will not s low the vehicle
down or maintain the set distance when
you drive towards an obstacle or some­
thing on or near the road that is not
mov ing, such as vehicles stopped in a
traffic jam, a stalled or disabled vehicle .
I f registered by the radar sensors,

94 Audi adapti ve cruise control and bra king gu ard
vehicles or obstacles that are not moving
can trigger a collision warning and if con­
firmed by the v ideo camera, an acute col­
lis ion warn ing .
- For safety reasons, do not use adaptive
cruise co ntrol when driving on roads with
many curves, when the road surface is in
poor condit ion and/or in bad weather
(such as ice, fog, gravel, heavy rain and
hydroplan ing) . Using the system under
these cond it ions cou ld result in a co lli ­
sion .
- Swi tch adap tive c ruise control off tempo­
rar ily when driv ing in turning lanes, on
expressway exits or in construction
zones . This prevents the vehicle from ac­
celerat ing to the set speed when in these
situations.
- The adapt ive cruise control system wi ll
not brake by itse lf if you put your foot on
the accelerator pedal. Doing so can over­
ride the speed and d istance regulation .
- When approaching stationary objects such as stopped traff ic, adaptive cruise
co ntrol will not respond and braking
guard w ill have limited function.
- The adapt ive cruise control system and
braking guard do not react to people, an­
imals, objects c rossing the road or on­
coming objects .
- The function of the radar senso rs can be
affected by reflective objects such as
guard rai ls , the entrance to a tunnel,
heavy rain or ice.
- Never follow a ve hicle so closely that you
cannot stop your vehicle safe ly. The
adaptive cruise contro l canno t slow or
brake the vehicle safely when you follow
another vehicle too closely. Always re­
member that the automatic braking
function cannot br ing the vehicle to a
sudden or emergency stop under these condit ions.
- To prevent unintended operation, always switch ACC off when it is not being used. (D Note
The sensors can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. That cou ld affect the adaptive
cruise control system and brak ing guard.
Have your authorized Aud i dea ler or au ­
thorized Audi Service Facility check their
funct ion .
In curves
Applies to vehicles: with Audi adaptive cru ise contro l
I
Fig. 9 4 Exampl e: dri ving in to a curve
When d riving into a curve c> fig. 94 and out of
a curve, the ad aptive cruise control may react
to a vehicle in the next lane and apply the
brakes. You can override or prevent the brak­
i ng by pressing the acce lerator pedal b riefly .
' Stationary objects
Applies to vehicles: with Audi adaptive cruise control
Fig. 95 Exampl e: objec t ch anging l anes and sta tio nar y
object
T he adaptive cru ise control system only reacts
to objects that a re mov ing o r that the system
has already detected as moving . For examp le,
if a vehicle @, which has already been detect-
ed by the adaptive c ruise contro l, tu rns or
ch anges lanes and another stationary vehicle .,.

96 Audi adaptive cruise control and braking guard
• 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 p lace. The message
ACC off appears.
@ Indicator lights
II-Adaptive cruise control is switched on . No
vehicles are detected up ahead. The stored
speed is maintained.
I-A moving vehicle is detected up ahead .
The adaptive cruise control system regulates
the speed and d istance to the moving vehicle
ahead and acce lerates/brakes automatica lly.
S, -Adaptive cruise contro l is switched o n. A
mov ing vehicle up ahead was detected. Your
vehicle remains stopped .
I-When au tomatic braking is not able to
keep enough distance to a p reviously detected
mov ing vehicle up ahead, you must take con­
trol and brake ¢
page 98 , Prompt for driver
intervention.
© Display
If adap tive cruise control is not shown in the
d isplay, you can call it up with the multifunc ­
tion steering wheel buttons~
page 23.
Based on the symbols in the display , you can
determ ine if the system is maintaining a dis­
tance to the vehicle ahead and w hat 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 ¢
page 98 .
Both arrows 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 d istance. For information on changing the stored distance, refer to
¢
page 97. If the
distance se lected 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 injur ies .
- Pressing the
!SET ! button when driving 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 .
(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 Electron ic Stabili­
zation Control (ESC) to the SPORT mode
when adaptive cruise control is switched
on .
Changing the speed
Applies to vehicles: with Audi adaptive cruise control
0
f
• 0
Fig. 99 Selecto r lever : chang ing t he spee d
• To increase or reduce the speed in incre ­
ments,
tap the lever up or down.
-
-a)
N
q :r
~
"' To increase or reduce the speed qu ickly,
hold the lever up or down until the red L ED
@ reaches the desired speed ¢ page 95,
fig . 98.
Following any changes, the new stored speed
will be displayed briefly in the display @
¢ page 95 , fig. 98.

Audi adaptive cruise control and braking guard 97
Driving in stop-and-go traffic
Applies to vehicles: with Audi adaptive cruise control
The adaptive cruise control system also as­
sists you in stop-and -go traffic. If a previous
detected vehicle ahead s tops, yo ur vehicle will
brake to a stop, within the limits of the sys ­
tem .
.,. To resume driv ing with adap tive cruise con ­
tro l, tap the accelerator peda l or
.,. Pull the lever toward you into position @
¢page 97, fig. 100.
(D Tips
-If adaptive cru ise contro l is active and
your vehicle does not start driving as ex­ pected after pulling the lever once, you
can start out aga in by tapping the accel­
erator pedal.
- If an obstacle is detected when your ve­
hicle starts dr iv ing, the system w ill
prompt you to take over¢
page 98.
Your vehicle w ill drive more slowly when
starting. This may also happen in some
s ituations when no obstacle is apparent.
Interrupting cruise control
Applies to vehicles: with Audi adaptive cruise contro l
Fig. 100 Selector lever
Requirement : adaptive cruise control must be
switched on .
Overriding cruise control
.,. To accelerate manually, pull the lever to­
ward you into position @and hold it there .
The message
ACC override appears . Or
.,. press the accelerator pedal. .,.
To resume cruise contro l, release the lever
or take your foot off the accelerator pedal.
Canceling cruise control while driving
.,. Move the lever into position @. The mes­
sage
ACC standby appears . 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 you into pos ition
@ . Th e message
ACC standby appears.
.,. To resume cruise control, press the brake
pedal and pu ll the lever toward you into po­
sition @.
A WARNING
-
Never resume the stored speed if the
speed is too high for prevailing road, traf­
fic or weather conditions.
Setting the distance
App lies to vehicles: with Audi adapt ive cr uise contro l
Fig. 101 Selector lever: setting the distance
.,. Tap the switch to display the current set dis­
tance
¢ fig. 101 .
.,. To increase or reduce the distance by incre­
ments, tap the switch again to the left or
right. The distance between the two vehicles
w ill change in the instrument cluster dis ­
play .
When approaching a moving vehicle up ahead,
the adaptive cruise control system automati­
cally brakes to match that object's speed and
Ill-

98 Audi adapti ve cruise control and bra king gu ard
then maintains the stored distance. If the ve­
hicle ahead accelerates, adaptive cruise con­
trol will also acce lerate up to the stored
speed.
The higher the speed, the greater the distance
in yards (meters)¢ ,&. T he
Di sta nc e 3 setting
is recommended .
The distances p rov ided are specified values.
D epending 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 95, fig. 98 when you change the set­
tings.
~ -~ --- Dis tance 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 1 second.
~ -- ~-- Dista nc e 2: This setting corre­
sponds to a distance of 1 18 feet/36 meters
when traveling at 62 mph (100 km/h), or a
time interva l of 1.3 seconds.
~ --- ~-Dis ta nce 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.
~---- ~ Dista nce 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 inju ry.
- Setting short distances to the traffic
ahead reduces the t ime and distance
available to br ing your vehicle to a safe
stop and makes it even mo re necessa ry
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.
(D Tips
- Distan ce 3 is set automatically each time
you switch the ignition on .
- Your standard settings a re 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 cru ise control
.. Select the desired driving mode in drive se­
lect¢
page 109 .
(D Tips
Your settings are automatically stored and
assigned to the remote control key being
used.
Prompt for driver intervention
Applies to vehicles: with Aud i adapt ive cru ise contro l
Fig. 1 02 In strument cluster: request for driver inte r­
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 c ruise con­
tro l system is not enough to mai nta in enough
dis tance to the veh icle ahead .
The ind icator light
I and the symbol in the
display will warn you abo ut the s ituation
¢
fig. 102. You will also hea r an acous tic sig­
nal.
- Press the brake pedal to slow your vehicle
down.

Audi adaptive cruise control and braking guard 99
Audi braking guard
Description
Applies to vehicles: with Audi adaptive cruise control
Fig. 103 Instrumen t cl uste r: ap proac h warn ing
Braking guard uses radar sensors and a video
camera . It a lso functions within the lim its of
the system whe n 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 y our own veh icle is traveling at a
high speed and approaching a veh icle up
ahead that is moving more slowly . Bra king
g ua rd does not react if i t cannot detect th e
si tuation.
The system advises you of va rious 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 col lisio n. The indicator
light
I i n the display comes on .
- The approach warning is g iven when a de­
tected vehicle up ahead in yo ur lane is mov ­
i ng much more slowly tha n you are o r if it
b rakes sha rply . When this wa rning is given,
i t may only be possib le to av oid a collision
by swerving or br aking sh arply . Th e ind ic a tor
li gh t
I and indicator in the disp lay will warn
yo u about the danger
c::> fig . 103 . You will al­
so hear an acoustic sig na l.
If yo u do not re act fast enoug h or do not re act
at all to the situat io n, braking g uard will inte r-
11
Thi s is not ava ilable in som e coun tri es.
vene by braking and the message braking
guard intervention will appea r.
- If a coll is ion is im minen t, the sy st em w ill
first provi de an acute warning by brie fly and
shar ply a pplying the brakes.
- If you do not re act t o the acu te war ning,
bra king g uard can brake w ith increas ing
force w ith in the lim its of the system. T his
red uces the vehicle speed in the event of a
co llision.
- The system can initiate maximum brak ing
short ly before a co llision
ll. Full dece leration
at high speeds occurs only in vehicles with
adapt ive cr uise control and side assist (pre
sense plus).
- If the brak ing g uard senses that yo u are not
braki ng hard enough w hen a co llision is im­
m inent, it can inc rease t he b ra ki ng fo rce .
- The pre sense functions also engage whe n a
col lision is imm inent
c::> page 196 .
Which function s can be controlled?
You can switc h braking guard an d the dis ­
tance/approach warning on or off in the M MI
c::> page 100, Settings in the MMI.
&_ WARNING
Lack of attent ion can cause collisions, ot h­
e r accidents and serio us pe rsonal inj uries .
Th e braking gua rd is an assist system and
ca nnot pr ev en t a collisi on by its elf . T he
dr iver must always in tervene. The drive r is
al way s res pons ible f or br aki ng a t the cor­
rect t ime.
- Always pay clos e att ention to traffic ,
e v e n w hen the bra king g uard is swi tched
on. Be ready t o intervene and be ready to
take comp lete contro l whenever necessa­
ry. Always keep the sa fe and legal dis ­
tanc e between your ve hicle an d veh icles
up ahead.
- Braking guard works wi thin limits and
wi ll not respo nd outside t he system lim­
its, for e xamp le w hen approaching a
stopped vehicle o r stationary obstacle ..,.