2012 AUDI A6 Owners Manual

Adaptive cruise control and braking guard
vehicles such as motorcycles and bicy­
cles.
- The adaptive cruise control system can­
not detect people, animals and cannot
detect objects or traffic that crosses your
lane of travel.
- Never drive at speeds that are too fast
for traffic, road and weather conditions.
- Never use adaptive cruise control when
you cannot drive safely at a steady
speed, including on winding roads or
when road conditions are poor (for exam­
ple, in construction sites, on ice, gravel,
in fog, heavy rain or on wet roads that in­
crease the risk of hydroplaning).
- Never follow a vehicle so closely that you
cannot stop your vehicle safely. The
adaptive cruise control cannot slow or
brake the vehicle safely when you follow
another vehicle too closely. Always re­
member that the automatic braking
function cannot bring the vehicle to a
sudden or emergency stop under these
conditions.
- Never rest your foot on the accelerator
pedal, especially when the adaptive
cruise control is being used. Pressure on
the accelerator will override the adaptive
cruise control braking function and pre­
vent the brakes from being applied when
adaptive cruise control detects a situa­
tion when the brakes must be applied.
- Never use adaptive cruise control when
the radar sensors cannot accurately de­
tect vehicles moving in traffic. The radar
sensor's vision can be reduced by heavy
rain, ice, snow, heavy road spray and re­
flections from guard rails, tunnel entran­ ces, etc. These and similar conditions can
prevent vehicles from being accurately
detected and in some cases they may not
be detected at all.
- Always turn off adaptive cruise control
when entering turn lanes, exit lanes and
construction zones or in similar situa­
tions because the vehicle will automati­ cally accelerate to the stored speed when
the road ahead is clear. -
To prevent unintended operation, always
switch ACC off when it is not being used .
(D Note
The sensors can be moved by impacts or
damage to the bumper, wheel housing and
underbody. Damage in these areas could
change the way the adaptive cruise control
system and Audi braking guard work to­
gether. Have your authorized Audi dealer
check to make sure that the adaptive
cruise control system is working properly if
your vehicle had a minor frontal impact or
was damaged in the area of the sensors.
In curves
Applies to vehicles: wi th adaptive cruise control
Fig. 78 Example: driving into a cu rve
When driving into a curve ¢ fig. 78 and out of
a curve, the adaptive cruise control may react
to a vehicle in the next lane and apply the brakes. You can override or prevent the brak­
ing by pressing the accelerator pedal briefly.
Stationary objects
Applies to vehicles: wit h adaptive cruise control
Fig. 79 Example : object c hanging lanes and stat iona ry
o~ect
~
79

80 Adaptive cruise control and braking guard
The adaptive cruise control system on ly reacts
to objects that are moving or that the system has already detected and reg istered as mov ­
ing.
Adaptive cruise control
Description
Applies to vehicles: with adaptive cruise control
Fig . 80 Detection range
What can adaptive cruise control do?
The adaptive cruise control system uses video,
radar and ultrasound. Moving vehicle ahead
can be recognized up to about 650 feet (200 m) away.
On open roads with no traffic, adaptive cruise
control works like a regu lar cruise control sys­
tem. The stored speed is maintained. When
approaching a moving vehicle detected up
ahead, the adapt ive cruise control system au­
tomatically slows down to match that vehi­
cle's speed and then ma intains the distance
that the driver previously stored. As soon as
the system does not detect a vehicle up
ahead, adaptive cruise control acce lerates
back up to the stored speed.
I n stop-and-go traffic, adaptive cruise control
can brake unt il the vehicle stops i f this is pos­
sible with in the systems' limits and capabili­
ties. ACC will not make an emergency stop.
Pull the lever<=>
page 80, fig. 81 towards
you into position @to reactivate ACC, the ve­
hicle will move forward when the vehicle in
front of you starts moving aga in. You can also
depress the accelerator to move forwa rd
again <=>
page 81 .
Which functions can be controlled?
When you switc h adaptive cruis e control on,
you can set the current speed as the "control
speed" <=>
page 80, Switching on and off.
When driving, you can stop cruise contro l
<=>
page 82 or change the speed r::!> page 82
at any time.
You can also set the distance to the object
ahead and set the adaptive cruis e control driv­
ing program
r::!> page 83.
Switching on and off
Applies to vehicles: with adaptive cruise control
Fig . 81 Operating lever: swit c hin g on/off
Fig . 82 Inst rument clus te r: adap tive cruise control
You can set any speed between 20 mph and
95 mph (30 and 150 km/h) .
An additional indicator appears in the Head­
up Display*.
Switching adaptive cruise control on
.,. Pull the lever toward you into position (D
~ fig. 81. ACC standby appears in the in­
strument cluster display.

Adaptive cruise control and braking guard 81
Setting the speed and activating
regulation
~ To set the current speed, press the !SET !
button ¢ fig. 81. The set speed is shown in
the tachometer @and in the display
¢
fig . 82. 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 lamps and messages in the instru­
ment cluster display inform you about the cur ­
rent system status and settings.
@ Indicator lights
Pl -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.
Mi -adaptive cruise control is swit ched on. A
moving vehicle up ahead was detected . Your
vehicle remains stopped and will not start
driving automatically.
I -When automat ic brakin g is not able to
keep enough distance to a previously detected
moving vehicle up ahead, you must take con ­
trol and brake¢
page 82, Prompt for driver
intervention.
© Display
If adaptive cruise control is not shown in the
disp lay, you can call it up with the multifunc ­
tion steering wheel buttons
¢page 23.
Based on the symbo ls 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 veh icle ahead was detected.
White vehicle -A vehicle ahead was detected .
Red vehicle -Prompt for the driver to take ac­
tion ¢
page 82.
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.
T he green zone on the scale shows the stored
distance . For information on changing the
stored distance ¢
page 83. If the distance
selected is too close or may soon become too
close, the arrows move into the red zone on
the scale .
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 driv ing at
speeds below
20 mph (30 km/h), will 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 Electronic Stabili­
zation Program (ESP) to the SPORT mode
w hen adaptive cruise control is switched
on.
Driving in stop-and-go traffic
Applies to veh icles: w ith adaptive c ruise control
The adaptive cruise contro l system also as­
sists you in stop-and-go traffic. If a previous
detected vehicle ahead stops, your veh icle will
brake to a stop, within the limits of the sys­
tem .
~ To resume driving with adaptive cruise con­
trol, tap the acce lerator pedal or
~ Pull the lever toward you into position @
¢ page 80, fig. 81. ..,_

82 Adaptive cruise control and braking guard
@ Tips
-If adaptive cruise contro l is active and
your vehicle does not start dr iving as ex­
pected after pulling the lever once, you
can start out aga in by tapp ing 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
c> page 82.
Your vehicle w ill dr ive more slowly when
starting. This may a lso happen in some
situations when there no obstacle is ap­
parent.
Interrupting cruise control
Applies to vehicles: with adaptive cruise control
Requirement: adaptive cruise control must be
switched on.
Overriding cruise control
., To accelerate manually, pull the lever to­
ward you into position @~
page 80, fig. 81
and hold it there. The message ACC override
appears . Or
.. press the accelerator peda l.
.. To resume cruise control, 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 peda l.
.. To resume the stored speed, move the lever
into position @.
Canceling cruise control when stopped
.. Push the lever away from you into position
· @ . The message
ACC standby appears .
.. To resume cruise control, press the brake
pedal and pull the lever toward you into po­
sition @.
A WARNING
Improper use of the adaptive cruise con­
trol can cause collisions, othe r acc idents
and serious personal injuries. -
Never resume t he stored speed if the
speed is too high for prevailing road,
traffic or weather conditions.
Prompt for driver intervention
Applies to vehicles: with adaptive cruise control
Fig. 83 Instrument cluster: requ est for driv er interve n·
tion
In certa in situations, the system will prompt
you to take action . For example, braking by
the adaptive cruise control system is not enough to mainta in enough distance to the
vehicle ahead.
The indicator light
I and the symbol in the
display will warn you about the situation
~ fig. 83. You wi ll also hear an acoustic signal.
- Press the brake pedal to slow your vehicle
down.
Changing the speed
Applies to vehicles: with adaptive cruise control
0
f
jJ
0
Fig. 84 Operating 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 qu ickly,
hold the lever up or down until the red LED ..,.

Adaptive cruise control and braking guard 83
@ reaches the desired speed ¢ page 80,
fig . 82.
Setting the distance and driving
program
App lies to vehicles: with adaptive cruise control
Fig. 85 Opera tin g le ve r: se tt ing th e distanc e
The distance at wh ich the adaptive cruise con ­
trol fo llows a vehicle in front is determined by
time intervals. A time interval to a vehicle in
front is estab lished and maintained. This pro­
duces a speed-dependent interval. The higher
the speed, the greater the safety interval in
yards (meters) ¢&, .
Setting the distance
.. Tap the switch to display the current set dis­
tance¢
fig. 85 .
.. To increase or reduce the distance by incre­
ments , tap the switch again to the left or
right . The distance between the two vehicles
will change in the instrument cluster dis­
play.
Setting the driving program
.. Select in the MMI: !CAR I function button>
Car Systems control button > Driver assist >
adaptive cruise control > Driving program .
Setting the distance
When approaching a moving vehicle up ahead,
the adaptive cruise control system automati­
cally brakes to match that object's speed and
then maintains the stored distance . When this
happens , the actual distance may briefly be
less than the stored distance. If the vehicle
ahead accelerates, adaptive cruise control will
also accelerate up to the stored speed. The
higher the speed , the greater the d istance
in yards (meters) ¢&,. .The
Distance 3 setting
is recommended.
The distances provided are specified values .
Depending 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 .
c=::,_c=::, ___ 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 interval of 1 second .
c=::, __ c=::, __ 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 interval of 1.3 seconds.
c=::, ___ c=::,_ 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 interval of 1.8 seconds.
c=::, ____ c=::, 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 interval of 2.3 seconds .
Setting the driving program
You can select Dynamic , Standard or Comfort
driving programs. Depending on the selected
driving program and distance, driving behav ­
ior when accelerating wi ll vary from dynamic
to comfortable.
A WARNING
Following other vehicles too closely in­
creases the risk of collis ions and ser ious
personal injury .
- Setting short distances to the traffic
ahead reduces the time and distance
availab le to bring 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.

84 Adapti ve crui se control and bra king guard
@ Tips
- Di sta nce 3 is set automatically each time
you switch the ignition on.
- Your standard settings are automatically
stored and assigned to the remote con­
trol key being used.
Audi braking guard
Description
Ap plies to vehicles: with a daptive cruise co ntrol
Fig. 86 Inst rument cluster: app roach wa rning
Aud i braking guard uses radar sensors and a
video camera. It is act ive at speeds above
about 6.2 mph (10 km/h) and also works
within system limits when adaptive cruise contro l is switched off.
On vehicles with adapt ive cruise control and
Aud i side assist (Audi p re sense plus), system
functions also engage when a co llision is im­
minent
¢ page 187.
What c an Audi br aking gu ard do?
When detected in time, the system can assess
situations when a vehicle ahead brakes sud­
denly or if your own veh icle is trave ling at a
h igh speed and approachi ng a veh icle up
ahead that is moving more slowly . A udi brak­
i ng guard does not react if it ca nnot detect
the sit uat ion .
The system advises you of various situations:
- The
distan ce w arn ing 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 coll is ion . The ind icator
ligh t
I in the disp lay comes on. Take imme- diate action to avoid the collision and in­
crease the distance to the vehicle up ahead
.
- The
appr oach warning is given when a de­
tected vehicle up ahead in your lane is mov­
ing much more slowly that you are or if it
brakes sharp ly. When this warning is given,
it may only be possible to avo id a co llision
by swerving or brak ing sharp ly. The indicator
light
I and the symbol in the display will
warn you about the danger¢
fig. 86. You
w ill also hear an acoustic signal.
If you do not react fast enough or do not react
at all to the situation, Aud i braking guard w ill
intervene by braking and the message
br aking
guard interv ention
w ill appear.
- If a collis ion is imminent, the system will
first provide an
a cute warning by braking
sharply .
- If you do not react to the acute warning, Au­
di braking guard will brake w ith increased
force in severa l stages to reduce the speed
in a poss ible coll is ion. O n veh icles with
adapt ive cr uise con tro l a nd Aud i side assist
(Audi pre sense plus), the system can brake
w it h increas ing fo rce up to max imum dece l­
eration shortly before a sensed collision
¢page 187.
- If
the Audi braking guard senses that you
are not braking hard enough when a colli­
sion is imminent, it can increase the braking
force.
Audi braking guard takes the driver's reaction
time into consideration in order to provide
t imely warnings. The system reaction time de­
creases automat ically in some situations, for
example when it detects acce lerator pedal use
or steering input. The Audi braking guard in ­
tervent io n stops in certa in situations, for ex­
amp le if you p ress the accele ra to r pedal to
pass the vehicle moving a head of you in your
lane.
Which function s can be controlled?
You can switch Aud i brak ing guard and the
distance/approach warning on or off in the
MM I ¢page 85, Settings in the MMI.

Adaptive cru ise co ntrol and b rakin g guar d 85
& WARNING
The Audi braking guard is an assist system
and cannot prevent a collision by itself .
The driver must always intervene. The driv­
er is always responsible for braking at the
correct time.
- Always pay close attention to traffic, even when the Aud i braking guard is
switched on. Be ready to intervene and
be ready to take complete control when­
ever necessary. Always keep the safe and
legal distance between your vehicle and
vehicles up ahead.
- Audi braking guard works within limits
and wi ll not respond outs ide the system
l imits, for examp le when approaching a
stopped vehicle or s tationary obstacle
(end of a traffic jam or vehicle that has
broken down in traffic).
- Always remember that the radar sensor
for the A udi braking guard works only
within defined detection and range limits
that may prevent the proper detection of
other vehicles.
- The radar sensor's function and range
can be reduced by rain, snow and heavy
spray. moving vehicles up ahead may not be promptly detected or may not be de­
tected at al l.
- Reflective surfaces includ ing crash barr i­
ers or tunnel entrances may impair the
function of the radar sensor .
(j) Tips
Lack of attention can cause coll is ions, oth­
er accidents and ser ious persona l injuries.
- You can stop the Audi braking guard in-
tervention w ith increas ing braking force
by applying the b rakes yourself or by ac­
ce lerat ing rapidly.
- Audi braking guard error messages
<=> page
85.
Settings in the MMI
App lies to vehicles : wi th adap tive c ruise contro l
.,. Select: I CAR I function button > Car s ystem s
cont ro l butto n > Driver a ssist > Audi brak ­
ing gua rd .
Sy stem -
Switch Audi b raking guard On and
Off . When you switch the ign it ion on, t he
message
Audi braking guard off a ppears in
the instr ument cluster d isp lay if the system is
switched off.
Early warning -The distance and approach
warnings in the d isp lay can be switched
On/
Off.
(D Tips
- Yo ur settings are automatically stored
and assigned to the remote cont ro l key
being used at the times the settings are
made.
- I f you switch the ESP to spor t mode, A u­
di braking gua rd switches off a utomati ­
cally ¢page
191.
Messages
Applies to vehicles : wi th adap tive c ruise control
ACC una vailable
ACC and braking guard: unavailabl e
The system cannot detect moving vehicles up
ahead co rrectly and is switched off . The sen­
sors have been d isplaced or are not working
proper ly. The Audi pre sense funct ions may a l­
so be affected.
ACC: unavailabl e at this time. No sensor vi­
s ion
ACC and b rak ing gu ide: una vailable at this
time . No s enso r vision
This message appears if the sensor view is ob­
structed, for examp le by leaves, snow, heavy
spray or d irt . Clean the sensors¢ page
78,
fig. 77.
ACC: unavailable at this time . Incline too
steep

86 Adaptive cruise control and braking guard
The road exceeds the maximum possible an­
g le for proper adaptive cruise contro l opera­
tion. Adaptive cruise control is sw itched off .
ACC: only selector lever positions D, S or M
available
Select the D/S or M selector lever position.
ACC: unavailable at this time. Parking brake
set
The adaptive cruise control system switches
off automatically if the parking brake is set .
ACC: unavailable at this time. ESP interven­
tion
This message appears if the Electronic Stabili­
zation Program (E SP) is wo rking to he lp stabi­
lize the vehicle. In this case, adaptive cruise
control switches off automatically.
ACC : Please take over
This message appears when adapt ive cruise
control cannot set the parking brake. Press
the brake pedal to prevent the vehicle from
r olling .
•••
Three white dots appear if a setting cannot be
selected with the operat ing lever . For exam­
ple, this happens if adaptive cru ise control
cannot resume driving in stop-and-go traffic
because one of the conditions required for
ACC to wor k is not prese nt.
Door open
The adaptive cruise control system cannot
switch on when a door is open.
Stationary object ahead
This message appears if you wou ld like to
switch adaptive cruise control on and there is
a stationary vehicle or obstacle directly ahead
of your vehicle.