2012 AUDI A5 COUPE brake

102 Adapti ve crui se control
Adaptive cruise control
Speed and distance
control system
Description
Applies to vehicles: with Audi adaptive cruise co ntrol
The adaptive cruise control driver assistance
program is a combined speed and distance
control system.
F ig. 110 Front bumper: Positio n of radar sensor
Any speed between about 20 mph (30 km/h)
and about 95 mph (150 km/h) can be set and
held with the adaptive cruise control. The sys­
tem also regulates a pre -set distance from the
vehicle ahead within the limits of the system described.
Driving can be more relaxed, particularly on
long trips on interstates or on other highways
that a re generally straight .
H ow do es it work?
You can operate the adaptive cruise contro l
using the lever on the steering wheel column
c::> page 104, How is the speed stored? and
c::> page 106, How is the distance (time inter ­
val) set? .
Driver inform ation
Important information is brought up in the
speedometer and in the instrument cluster
d isplay as the vehicle is being driven
c:::, page 107, Driver information .
What is imp orta nt fo r you to kn ow
The adaptive cruise control is set with system­
specified limits, that is, as a driver, you will have to adjust the speed and distance to the vehicle ahead in some instances
c:::,
page 111,
Driver intervention prompt
and c::, page 112,
System limitations.
A WARNING
--
Improper use of the adaptive cruise con­
trol can cause collisions, other accidents
and serious personal injury.
- Never drive at speeds that are too high
for traffic, road and weather conditions.
- Never follow the vehicle in front so close­ ly that you cannot stop your veh icle safe­
ly . The adaptive cruise control cannot
brake the vehicle safely when you follow
another vehicle too closely. Always re­
member that the adaptive cruise control
has a braking powe r that is only about
25% of the veh icle's maximum braking
abi lity, the automatic braking function
cannot bring the vehicle to a stop .
- Never use adaptive cruise control on
roads where you cannot drive safely at a
steady speed, including city, stop-and-go
or heavy traffic, on winding roads or
when road cond it ions are poor (for exam­
p le, on ice, gravel, in fog, heavy rain or
on wet roads that increase the risk of hy­
d rop laning) .
- The radar sensor 's
vision can be reduced
by rain, snow and heavy spray. This can
resu lt in veh icles dr iving ahead be ing in­
adequately detected or, in some circum­
stances, not detected at a ll.
If necessary,
t ake action yourself!
- Always turn off adap tive c ruise control
when en ter ing turn la nes, highway exit
lanes and construction zones or similar
situations beca use the vehicle will a uto­
mat ically acce le rate to the stored speed.
- Never rest your foot on the accelerator pedal, especially when t he adaptive
cruise contro l is being used because do­
ing so will override the braking function
and prevent the brakes from being ap­ plied by the system when it detects a sit­
uation when the brakes must be applied.
- Always remember that the adaptive
cru ise contro l has limits -it does not

react when you drive towards an obstacle
or something else on or near the road
t h at is not moving, such as vehicles stop­
ped 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 narrow ve­
hicles such as motorcycles and bicycles.
(D Tips
- Fo r safety reasons, the stored speed is
deleted when the ignition is turned off .
- The Electronic Stabilization Program
(ESP) and the Anti-Slip Regulation (ASR)
cannot be deactivated when the adaptive
cruise control is switched on. If the ESP
and the Anti-Slip Regulation (ASR) has been deactivated and you then switch on
the adaptive cruise control, the ESP func­
tion will also be activated automatically.
- Damage caused by accidents (e.g. if the
vehicle is damaged when parking) can af­
fect the radar sensor settings. This can
cause the system to malfunction or
switch off complete ly.
- The radar sensor cover is heated. In win­
ter cond itions, you should still check be­
fore driving to make sure it is free of ice
and snow. If necessary, clean the area
near the radar sensor carefully
9 fig. 110.
-To ensure that the radar sensor is not
blocked, foreign objects (e.g . stickers,
add-on parts) must not cover the area near the radar sensor
9 fig. 110. The
area near the radar sensor must not be painted, either.
- For Declaration of Compliance to United
States FCC and Industry Canada regula­
tions
~ page 296.
Adaptive cruise control 103
How does adaptive cruise control work?
App lies to veh icles: w ith adaptive cru ise control
Vehicles traveling ahead are detected with
the aid of a radar sensor.
Fig. 111 Radar sensor measu re m ent range
A radar sensor is built into the front of the ve­
hicle
9 fig. 111, which is subject to certain
system limits~
page 112. Stationary objects
are not taken into consideration. The system
is intended to measure the distance to reflec­
tive surfaces. The system responds after the
distance measurement has taken place. If a
measurement is not possible, the system does
not respond .
Open road
When the road is clear, the adaptive cruise
control works like cruise control. It maintains
a constant target speed specified by the driv­
er.
Driving in traffic
If a vehicle driving ahead is detected, the
adaptive c ruise control decelerates (within the
Limits of the system)
9 page 111, Driver in­
tervention prompt
and 9 page 112, System
limitations
to its speed and after adjusting,
tries to maintain the set distance from the ve­
hicle ahead . Th e vehicle may temporarily drive
slower than the set speed while adjusting
~.&. in Description on page 102.
If the vehicle in front accelerates, adaptive
cruise control also accelerates up to the speed
that you have set.
Situation requiring driver intervention
In some situat ions you will have to use the
footbrake to slow the vehicle down in order to .,..

104 Adapti ve crui se control
keep a safe distance from vehicle in front of
you or to avoid a rear-end collision . In this sit­
uation, a symbol appears and a warning tone
sounds
¢ page 111.
Passi ng anoth er vehicl e
If you move into the passi ng lane and no veh i­
cle is detected ahead, the adaptive cruise con­
trol accelerates to the speed you have set and maintains it.
Overrid e
You can increase your speed at any t ime by
stepp ing on the acce lerator pedal. After yo u
re lease the accelerator pedal, the system ad­
justs back down to the speed you previously set .
@ Tips
Please note that the amount of accelera­
tion the adaptive cruise control uses de­ pends on the Distance setting selected.
DISTANCE 1 gives you accelerat ion that is
dynamic and sporty . DISTANCE 4, o n the
other hand, g ives more moderate accelera­
tion . For more information about the time
intervals ¢
page 106, How is the distance
(time interval) set?.
- Please note that if the adaptive cruise
control has begun braking the vehicle
and the driver chooses to brake the vehi­
cle add itionally, the brakes may fee l
"hard" . This is simply due to the pressure
build- up of the initial braking.
- Adaptive cruise control is sw itched off af ­
ter pressing the footbrake . The speed
saved up this point can be resumed. To resume the saved speed, release the
brake pedal and pull the control lever
¢ page 105, Turning adaptive cruise
control off temporarily .
Switching the system on and off
Applies to vehicles: with adaptive cruise contro l
Fig. 112 Co ntrol lever : Sw itching o n and off
Sw itching the system on
.,. Pull the lever to position (D c::> fig. 112 .
Switching the system off
.,. Pres s the lever to pos it ion @ (latched).
How is the speed stored?
Applies to vehicles: wit h Audi adaptive cruise control
,' ts ~:_" ';;;", ' , E Sl'EEO CANCELU
. T ,0. -ON ... . RESUME~
Fig. 11 3 Control lever: Sto ring s peed
With the system switched 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
~ I S-ET ~I button c::> fig . 113 to store
the desired speed .
After the
I S ET I button is released, the current
speed is stored and ma intained .
The saved speed is now shown in the LED dis­ play in the speedometer by one or two illumi­
nated red light diodes ¢
page 108 . At the
same t ime, the saved speed is also shown for
a short time in the Information line
¢ page 109. ...,

@ Tips
For safety reasons, the stored speed is de­
leted when the ign ition is turned off.
Changing stored speed
App lies to vehicles: with adaptive cruise co ntrol
The speed con be changed without touching
the accelerator or broke pedal.
Fig. 114 Contro l leve r: Changing speed
Increasing speed
.. Press the lever briefly upwards 0
¢ fig. 114. USA models: the speed increases
by about 2 .5 mph . Canada models : speed
will increase by one mark on the speedome­
ter sca le .
.. Press the lever upwards
0 and hold it. As
long as you hold the control switch down,
the light diode display in the speedometer
LED display in the speedometer moves for­
ward and the speed is increased.
Reducing speed
.,. Press the lever downwa rds briefly 0-USA
models: the speed decreases by 2.5 mph.
Canada models: speed will decrease by one
mark on the speedometer scale .
.. Press the lever downwards
0 and hold it.
As long as you hold the control sw itch down,
the light diode display in the speedometer
LED display moves backward and the speed
i s reduced .
After releasing the control switch, the system
regulates the speed to the value just set.
After each adjustment, the newly-set speed is
shown for a short time in the Information line
¢page 109.
Adaptive cruise control 105
@ Tips
You can increase your speed at any time by
stepp ing on the accelerator pedal. After
you release the acce lerator pedal, the sys­
tem adjusts back down to the speed you
previously set. A new desired speed can be
stored at any time by press ing the
!SET !
button ¢page 104, fig . 113.
Turning adaptive cruise control off
temporarily
Appl ies to vehicles: wit h adaptive cruise control
In some situations it makes sense to turn
adoptive cruise control off temporarily.
Fig. 115 Contro l l ever: Turnin g adapt ive cru ise contro l
off tempora rily
Turning control off temporarily
.. To shut off the control with the save func­
tion, either depress the brake pedal, or
.. Press the lever in the d irection of the arrow
@¢fig. 115.
Reactivating control
.,. To resume the saved speed, release the
brake pedal and press the lever in the d irec­
tion of the arrow
(D.
_&. WARNING
Improper use of the adaptive cruise con­
trol can cause collisions, other accidents
and serious personal injuries. Never re-
sume the stored speed if the speed is too
high for prevailing road, traffic or weather
-
conditions. ..,.

108 Adapti ve crui se control
You can select among the different in forma ­
tion by repeated brief taps on the
I RESET I but­
ton on the windshield wiper lever¢
page 23,
Operation.
© S tatus in dicator
The information in area © is not displayed
permanently. Information is disp layed only if
you set or change the speed setting, change
the time interval, when messages are dis­
played or if the adaptive cruise control is
turned off for safety reasons.
Speedometer and indicator light display
App lies to vehicles: with adaptive cruise control
~
- ---
~
® @ ©
Fig . 118 Instrument clus ter: Indicator light
Desired spe ed
The desired speed set by the driver is dis­
p layed by a red LED in the LED display in the
speedometer.
N
?3
" 00 a,
I f the des ired speed was set between two
lines on the speedometer using the
ISETI b ut­
ton, the two closest light diodes wi ll come on
¢ page 107, fig. 117.
The system a llows only speeds from 20 to 95
mph (30 to 150 km/h) to be set. This speed
range is faint ly illuminated in the speedome­
ter (LED lights) .
Indicator lights (symbols )
- @ Open r oad :
The ind icator light shows
that adapt ive cru ise contro l is active a nd
that no object is ahead of the veh icle. Astor­
ed speed requested is maintai ned .
-@ Driving in traff ic: The ind icator light indi­
cates that an object has been detected trav­
eling in front. Your speed is adjusted accord- ing to the speed of the vehicle in front.
The
adaptive cruise contro l accelerates and
brakes automatica lly w ithin the system's op ­
eration parameters.
- ©
Dri ver i nte rvention prompt : The red
flashing warning light means
Reque st for
driver to as sume con trol.
You as the dr iver
must slow the vehicle with the foot brake.
The symbol tells you that the adaptive
cruise control is not able to slow the veh icle
down enough to keep a enough distance to
the vehicle in front of you. An warning tone
w ill also sound when the symbo l appears.
For more information about the driver inter ­
vention prompt
¢ page 111.
CJ) Tips
-If you use the accelera tor to go faste r
t han the speed of the object ahead of
you, the
d riv e r intervent ion p rompt wi ll
not be accompanied by a warning s ignal.
- If the speed you previously set is exceed ­
ed, the indicator light in the speedome­
ter wi ll switch off.
Display in the instrument cluster
Applies to vehicles: wit h adaptive cruise control
F ig . 119 Display in the inst rume nt cluster
Scroll th roug h the available informa tion d is­
plays by briefly tapping the
I RESET ! button at
the end of the windshield wiper lever. You can
se lect information from the tr ip computer,
navigation system* or adaptive cruise control.
@ Vehicle symbol
@ Distance
© Status

@ Vehicle symbol
The vehicle symbol indicates whether the sys­
tem has detected an object traveling in front.
-Vehicle outline : Open road, no vehicle
ahead.
- White vehicle: A vehicle is detected ahead .
-Red vehicle: Request for driver to assume
control.
@ Distance
Using the arrows and scale, you can detect
how far it is to the vehicle in front of you.
-Open road: No arrow appears when the ve­
hicle is on an open road and there is no vehi­
cle ahead.
- Driving in traffic: If a vehicle is detected
ahead, the arrow moves on the scale . The
green area represents the distance set.
When approaching s low ly, the arrow moves
from the
gray zone to the green zone on the
scale.
- Request for driver to assume control: When
approaching rapidly, the arrow serves as an
early warning signal. If the d istance select­
ed is exceeded or possibly not reached, the
arrow moves into the
red zone on the scale .
In certa in driving situations, you as the driv­
er will have to ta ke act ion
q page 111, Driv­
er intervention prompt.
@Status
-The text ACC OFF appears in white letters
when adapt ive cruise control is turned off.
- The text
ACC AVAILABLE appears in wh ite
letters when the system is turned on but no
desired speed has been set .
- The text
OVERRIDE appears in white letters
when you exceed the desired speed by accel ­
erating .
- The text
DISTANCE! appears in red letters
when the interval to a vehicle traveling
ahead is too short and you have to slow you r
vehicle additionally with the foot brake .
- The text messages
DISTANCE 1 to DIS ·
TANCE 4
appear in green letters to ind icate
Adaptive cruise control 109
the time interval you have set and adaptive
cruise contro l is in management mode.
- If the driving program "standard" is re­
placed by "comfort" or "dynamic" using the
MMI*, the above text message is supple ­
mented by an appropriate prompt, e.g.
DIS­
TANCE 1 DYN .
System status indicator
Applies to vehicles: wit h adaptive cruise contro l
The text messages and symbols shown in this
area of the display ore not displayed perma­
nently.
Fig. 120 System status indicator
Time intervals (such as~ ---- ~>
The different symbols for the time intervals
appear if you change the settings ~
fig. 120 .
The text message ... (three white dots) ap­
pears if a setting cannot be implemented with
the operat ing lever . The following are possible
reasons:
- If you pull the contro l lever towards you to
resume speed but no requested speed was
set .
- If you push the lever up to increase (or down
to reduce) speed when no speed has been
set previously.
- If you push the lever up to increase (or down
to reduce) speed and this speed is outside
the range from 20 to 95 mp h (Canada mod­
els: 30 to 150 km/h).
ACC functionality limited
The text message ACC functionality limited
appears when the ACC system does not detect ..,.

110 Adaptive cruise control
any objects over an extended time period. For
the time being, the distance to vehicles up
ahead is not being controlled. The ACC system
is not switched off, so increased alertness is
required. The following may be reasons for
the text message ACC Functionally limited:
- The ACC sensor is dirty. The ACC system is
not reacting, or is not reacting correctly, to
vehicles traveling ahead .
- It is possible that you are driving on a road
with very light traffic
without anything at
the side of the road (e.g. guard rails, traffic
signs, trees). As soon as a vehicle is detected
by the system again, it returns to its control
range and the text message disappears.
The ACC sensor is located in the right front
trim grille
¢ page 102, fig . 110. If there is a
loss of operation due to heavy contamination,
this area should cleaned to restore proper op­
eration.
ACC not available
The text message ACC not available appears,
for example, if the temperature of the brakes
is excessive . Adaptive cruise control is tempo­
rarily not available. A warning tone sounds as
a reminder.
ACC not available!
The text message ACC not available! appears
in the event of a malfunction. Adaptive cruise
control is turned off. A warning tone sounds
as a reminder. Have the system inspected by a
qualified dealership.
ACC sensor blocked !
The text message ACC sensor blocked ! ap­
pears when the ACC system can no longer
guarantee safe detection of objects. Adaptive
cruise control is turned off. A warning tone
sounds as a reminder.
To decide whether it is necessary to switch off
the ACC (ACC sensor blocked
!) or if it is only a
temporary condition (ACC Functionally limit­
ed), the system will also takes into considera­
tion the outside temperature and/or the wind­
shield wiper operation. The
ACC sensor is dirty or blocked (e.g. leaves,
snow).
The sensor should be cleaned to restore prop­
er sensor function¢
page 102, fig. 110.
Engine speed !
The text message Engine speed ! appears in
vehicles with manual transmission when the driver did not shift up or down in time while
using adaptive cruise control braking or accel­
erating, causing the vehicle to exceed or not
reach the permitted limit speed. This causes
adaptive cruise control to deactivate automat­
ically. A chime sounds as a reminder.
Parking brake!
The text message Parking brake! appears if
emergency braking was manually initiated
with the Electromechanical Parking Brake
(EPB). The adaptive cruise control is turned
off. This is accompanied by a warning tone.
Stabilisation program
The text message Stabilisation program ap­
pears if the Electronic Stabilization Program
(ESP) has intervened. In this case the adaptive
cruise control is automatically turned off. This
is accompanied by a warning tone.
Speed
The set speed in mph (Canada km/h) always
appears when saving or changing the speed in
adaptive cruise control¢
page 104, How is
the speed stored?
and ¢ page 105, Changing
stored speed.
Speed too low
The text message Speed too low appears if
the current speed is too low
to set or to hold
the requested speed.
When setting a desired speed, it must be at
least 20 mph (30 km/h). At speeds below 12
mph (20 km/h), the cruise control is turned
off.
In speeds over 95 mph (150 km/h), the sys-
tem remains active and resumes the speed of .,..

95 mph (150 km/h) if the driver removes the
foot from the accelerator .
Selector lever position!
The text message Selector lever position! ap­
pears when the selector lever is moved to po­
sition
N. In thi s position, adaptive cruise con­
trol is not avai lab le .
Driver intervention prompt
Applies to vehicles: with adaptive cruise control
The driver intervention prompt co/ls on the
driver to toke over the situation.
Fig. 121 Instrument clus te r: Driver inte rven tion
pr ompt
In certain situations, the braking power of the
adaptive cruise control is not sufficient to
maintain an adequate distance from the ob­
ject ahead . In this situation, the adaptive
cru ise control calls on
you as the driver to take
action.
The
driver intervention prompt alerts you vis­
ually and audib ly .
- A red vehicle is shown in the instrument
cluster disp lay
¢ fig . 121 .
-The text DISTANCE! appears in the status
line .
Adaptive cruise control 111
- The indicator light in the Instrument cluster
blinks red.
- A warning tone sounds.
(0 Tips
-If the adaptive cruise control initiates
braking, the hydraulic brake system is
under pressure . Th erefore, the brake
pedal distance is shorter and the pedal
"feels" harder.
- Adaptive cruise contro l is swi tched off af ­
ter pressing the footbrake. The speed
saved up this point can be resumed.
- To resume the saved speed, re lease the
brake pedal and press the control lever
¢ page 105, Turning adaptive cruise
control off temporarily.
- If you use the accelerator to go faster
than the speed of the object ahead of
you, the
driver intervention prompt will
not be accompan ied by a warn ing signal.
- If the speed you previously set is exceed­
ed, the indicator light in the speedome­
ter will switch off.
MMI settings
App lies to vehicles: with adaptive cruise control
Individual settings for adoptive cruise control
con be selected in the MMI*.
Settings for the driving program can be ad ­
justed individually to the particular user and saved in the MM!*.
,,. Select:
I CAR ! function button > Adaptive
Cruise Control
> Driving program .
Setting the driving program
In the driving program menu you can adjust
the characteristics of adaptive cruise control
to what you want using
dynamic , standard or
comfort.
Saving settings
Your individua l settings are automatically
saved and assigned to the remote control key
being used ( remote key storage). If the key is .,..