2012 AUDI A8 warning

82 On the road Requirem ent : The message
Key not recog­
nized. Hold b ack of key against marked area.
See owner 's manual.
must appear and the in ­
dicator light
m must sw itch on.
• Hold the master key vertica lly in the loca­
tion indicated y>l} q fig .
82.
• Press the brake pedal~ A in Starting the
engine on page 80.
.. Press the !~S _T _A_ R_T_ E_N_ G_ I_ N _E_ S_T_ O_ P~ I button.
The eng ine will start .
• Drive to your author ized Audi dealer imme­
diately to have the malfunct ion corrected .
@ Tips
You can view the message again by press­
ing the !START ENGINE STOP I button.
Electromechanical
parking brake
Operation
The electromechanical parking broke replaces
the hand broke.
Fig . 83 Ce nter console: Parking brake
• Pull on the switch(®) ~ fig. 83 @ to app ly
the parking brake . The indica tor light in the
switch illuminates.
• Step on the brake pedal or the accelerator
pedal and press the switch(®) at the same
t ime to release the parking brake. The indi ­
cator light in the switch goes out .
Your vehicle is equipped wit h an electrome­
cha nica l parking brake. The parking brake is
designed to prevent the vehicle from rol ling
unintentionally and rep laces the hand brake . In
addition to the normal functions of a tradi­
tiona l hand brake, the electromechanical
parking brake provides var io us convenience
and safety functions .
When starting from rest
-The integral start ing ass ist helps you when
driving by automatically releasing the park­
ing brake
~ page 83, Starting from rest .
-When starting on inclines, the starting as­
sist prevents the vehicle from unintentiona l­
ly rolling back. The braking force of the
parking brake is not released until sufficient
driving force has been built up at the
wheels.
Emergency brake function
An emergency brake ensures that the vehicle can be slowed down even if the
normal brakes
fail
q page 84, Emergency broking.
Indicator lights
-If the parking brake is closed with the ign i­
tion
switched on the indicator lights come
on - (U SA mode ls)/ . (Canada models)
in the instrument cluster and in the switch.
- If the parking brake is closed with the igni­
tion
switched off the indicator lights come
on - (USA mode ls)/ . (Canada models}
in the instrument cluster and in the sw itch
for about 20 seconds .
A WARNING
Do not press the acce lerator pedal inadver ­
tently if the vehicle is stationary but the
engine is running and a gear is selected.
Otherwise the vehicle will start to
move
immedia tely and could result in a crash.
(D Note
If the symbol . in the display or the indi­
cator light .. (USA models)/ . (Cana­
da models) in the instrum ent cluster flash­
es, there is a malfunction in the brake sys­
tem. Please refer to the detailed descrip-
tion of the indicator lights
~ page 14. ll-

-If the indicato r light - (USA mod ­
els)
,111 (Canada models) or I.I turns
on, there may be a malfunction in the
parking brake
¢page 15.
@ Tips
-You can apply the parking brake at any
time - even w ith the ignition switched
off. The ignit ion must be on in order to
release the parking brake.
- Occasiona l noises when the park ing
brake is applied and released are norma l
and are not a cause for concern.
- When the vehicle is parked, the parking
brake goes through a self-test cycle at
regular intervals. Any assoc iated noises
are norma l.
Parking
Various rules apply to prevent the parked ve­
hicle from rolling away accidentally.
P a rking
~ Stop the vehicle w ith the foot brake.
~ Pu ll the switch© to apply the parking
brake.
~ Se lect the P selector lever position
¢page 109.
~ Turn the eng ine off ¢,& .
In addition on incline s and grade s
~ Turn the steering wheel so that your vehicle
will roll against the curb in case it should
start to move.
A WARNING
-When you leave your veh icle - even if on­
ly b riefly - always take the ignition key
with you. This applies particu la rly when
children remain in the veh icle. Otherw ise
the ch ild ren could sta rt the engine, re­
lease the parking brake or operate elec­
trical equipment (e .g. power windows).
There is the risk of an accident.
- When the vehicle is locked, no one - par­
t icu larly not ch ildren should remain in
the vehicle. Locked doors make it more
On th e ro ad 83
difficult for emergency workers to get in­
to the vehicle - putting lives at risk.
Starting from rest
The starting assist function ensures that the
parking broke is released automatically upon
starting.
Stopping and appl ying p arking brake
~ Pull the switch(®) to apply the pa rking
brake.
Sta rting and automaticall y releasing the
parking brak e
~ When you start to drive as us ual, the pa rk­
ing brake is automatically released and your
veh icle begins to move .
When stopp ing at a traffic signal or stopping
in city t raff ic, the parking b rake can be ap­
plied. The vehicle does not have to be held
with the footbrake. The parking brake elimi­
nates the tendency to creep w ith a dr ive range
engaged. As soon as you drive off as usua l,
the parking brake is released automatically
and the vehicle starts to move.
St arting on slope s
When starting on inclines, the sta rting assist
prevents the vehicle from unintentionally roll­
ing back. The braking force of the parking
brake is not re leased until suff ic ient driving
force has been built up at the wheels.
(D Tips
For safety reasons, the parking brake is re­
l eased automatically on ly when the driv­
er's safety belt is engaged in the buckle.
Starting off with a trailer
To prevent rolling back unintentionally on an
incline, do the following:
~ Keep the switch(®) pulled and depress the
accelerator. The parking brake stays applied
and prevents the vehicle from roll ing back-
ward . ..,.

84 On th e road
• You can release the switch (®) once you are
sure that you are developing enough for­
ward momentum at the wheels as you de­
press the accelerator .
Depending on the weight of the rig (vehicle
and trai ler) and the severity of the incline, you
may roll backwards as you start . You can pre­
vent roll ing backwards by holding the parking
brake switch(®) pulled out and accelerating -
just as you would when starting on a hill with
a conventional hand brake .
Emergency braking
In the event that the conventional brake sys­
tem fails or locks .
• In an emergency, pull the switch(®) and
continue to pull it to slow your vehicle down
with the parking brake .
• As soon as you release the sw itch
C®> or ac-
cele rate , the braking p rocess stops.
If you pull the switch(®) and hold it above a
speed of about 5 mph (8 km/h), the emergen ­
cy braking function is in it iated. The veh icle is
b raked at all four wheels by activa ting the hy­
d raul ic br ake system. The b rake performance
is simi lar to making an emergency stop
c::> & .
In order not to activate the emergency brak­
i ng by m ista ke, an audible wa rning tone (bu z­
z er) sounds when the swi tc h
C®> is pulled. As
soon as the switch(®) is released, or the accel­
erator pedal is depressed, emergency braking
stops .
.&_ WARNING
Emergency braking should only be used in
an emergency, when the normal foot brake
has failed or the brake pedal is obstructed.
Using the parking bra ke to perform emer­
gency braking will slow yo ur vehicle down
as if you had made a fu ll brake applicat ion.
T he laws of physics cannot be s uspended
even w ith ESC and its associate d compo­
nents (ABS, ASR, EDL). In corners and
when road or weather conditions are bad, a full brake application can cause the vehi- cle to sk
id or the rear end to break away -
risking an accident.
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 proximate ly 3 mph (3 km/h). An ind icator
l ight . (USA
models) ;a (Canada mode ls) in
the instr ument cluster d isp lay also tur ns on at
the same time. The indicator light.,.
turns off when the speed decreases be low the
stored maxim um speed.
Setting a th reshold is recommended if you
would like to be rem inded when you reach a
certain maxim um speed. Situations whe re you
may want to do so include driving in a co untry
with a genera l speed limit or if there is a
specified maximum speed for winter tires.
(D Tips
Even though your vehicle is equipped w ith
a speed warn ing 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 ! function b utton > Car systems
contro l button > Dri ver ass ist > 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 adj usted 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 . 84 Control lever with set button
Fig . 85 D isplay: Selected speed
.,. Pull the lever to position (D ~ fig . 84 to
swit ch the system on .
.,. Drive at the speed you wish to set.
.,. Press button @to set that speed.
The stored speed and the ind icator light
[lj;(i)~1ij (US models) 1 11 (Canad ian models) ap­
pear in the instrument cluster display
¢ fig. 85. The display may vary, depending on
the type of disp lay in your vehicle. The indica­
tor light
Ill in the instrument cluster also illu­
minates.
The speed is kept constant via an engine out­
put adjustment or active 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.
On the road 85
-For safety reasons, the cruise control
should not be used in the city, in stop­
and-go traffic, on twisting roads and
when road conditions are poor (such as ice, fog, gravel, heavy rain and hydro­
plan ing) - risk of accident .
- Turn off the cruise control temporarily
when enter ing turn lanes, highway exit
lanes or in construction zones.
- Please note that inadvertently ''resting"
your foot on the accelerator pedal causes
the cruise control not to brake. This is
because the cruise control is overridden
by the driver's acceleration .
- If a brake system malfunction such as
overheating occurs when the cr uise con­
trol system is switched on, the braking
function in the system may be switched
off . The other cruise contro l functions re­
main active as long as the indicator light
tij;[i)~1ij (US models) 111 (Canadian mod­
els) is on.
(D Tips
The brake lights illuminate as soon as the brakes decelerate automatically.
Changing speed
.,. Press lever in the 0 or 0 direction
¢ page 85, fig . 84 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 press ing the lever. If you keep the
lever pressed down , you will alter your speed
in 5 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 acceler­
ator pedal.
If, however, you exceed your saved speed by
6 mph (10 km/h) for longer than 5 m inutes,
the cruise control wil l turn off temporarily.
The green symbol
[ljlIJll (US models) ill in ..,_

86 On the road
the display is replaced with a white symbol.
The saved speed remains the same .
Presetting your speed
You con preset your desired spe ed while the
vehicle is not moving.
,.. Switc h on the ignition.
,.. Pull lever into pos ition
(D ~ page 85,
fig . 84 .
... Press the lever in the 0 or 0 direction to
increase or decrease your speed .
... Re leasethelevertosavethatspeed.
This funct ion makes it possible, for example,
to save the speed yo u want before driving on
the highway . Once on the highway, activate
the cruise contro l by pull ing the lever toward
(D .
Switching the system off
Temporary de activation
... Press the brake pedal, or
... Press the lever into pos ition @ (not clicked
into place)
~ page 85, fig . 84, or
,.. Drive for longer tha n 5 minutes at mo re
t h an 5 mph (10 km/h) above the sto red
speed.
Switching off completely
... Press leve r into posi tion @ (clicked into
place), or
,.. Swit ch the ignition off.
The system reta ins the saved speed if you de ­
activate the cru ise control temporarily . To re­
sume the saved speed, release the b rake ped­
a l and pull the lever to position
(D .
Sw itch ing the ign ition off erases the saved
speed .
A WARNING
You should only return to the saved speed
if it is not too fast for the current traffic
condi tions - risk of an accident!

Audi adapt ive crui se c ontrol an d bra kin g guard 8 7
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 . Th is he lps 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 93.
Adaptive cruise control and Audi braking
guard have technica l limitations that you
must know, so p lease read this section care­
fully, understand how the system works and use them properly at all times.
General information
General information
Applies to vehicles: with Audi adaptive cruise control
Fig. 86 Front of the veh icle: sensors and video came ra
The areas that conta in the radar and ultrason ­
ic sensors and the v ideo camera ¢
fig. 86
must neve r be covered by stickers or other ob­
jects or obstructed w ith dirt, insects, snow or
ice that will interfere w ith the adaptive cruise
control system and Audi braking guard. For in­
formation on cleaning , refer to ¢
page 205.
The same applies for any modifications made
in the front area.
T he function of the Adaptive cruise cont ro l
system and A udi braking guard is limited un­
der some conditions.
- Objects can on ly be detected when they are
w ith in sensor range
¢page 89, fig. 89 .
-The system has a limited ability to detect
objects that are a shor t distance ahead,
off
to 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 a ll.
- Stationary objects¢
page 88.
-When driving throug h curves ¢ page 88.
& WARNING
Always pay attent ion to traffic when adap ­
tive cruise contro l is switched on and brak­
ing g uard is active. As the driver, you are
still respons ible for start ing and for ma in­
taining speed and distance to other ob­
jects . Braking guard is used to assist you .
The driver must a lways take action to avo id
a collis ion. The driver is a lways responsible
for braking at the co rrect time.
- Improper use of adaptive cru ise control
can cause collisions, other acc idents and
serio us pe rsonal in jury.
- Never let the comfort and conven ience
that adaptive cruise control and Audi
braking guard offer dist ra ct you from the
need to be a lert to t raff ic condi tions and
the need to remain in full con trol of yo ur
vehicle at a ll times,
- Always remember that the adaptive
cruise contro l and Audi braking guard
have limits -they will not s low the vehi ­
cle down or maintain the set d istance
when you drive towards an obstacle or
something 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 regis tered by the radar sensors,

88 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. 87 Ex ampl e: dri ving in to a curve
When d riving into a curve c> fig. 87 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. 88 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 off o r
ch anges lane and ano ther stationary veh icle .,.

90 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/bra kes automatica lly.
f§ . Adaptive cru ise control is switched on . A
mov ing vehicle up ahead was detected. Your
vehicle remains stopped .
I -When automatic 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 92, 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 92.
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 91. 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
ty Control (ESC) to the SPORT mode
when adaptive cruise control is switched
on .
Changing the speed
Applies to vehicles: with Audi adaptive cru ise control
0
f
• 0
Fig. 92 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 89,
fig . 91.
Following any changes, the new stored speed
will be displayed briefly in the display @
¢page 89, fig. 91.