118 Adaptive cruise control
Turning adaptive cruise control off
temporarily
Applies to vehicles: with adaptive cruise co ntrol
In some situations it makes sense to turn
adaptive cruise control off temporarily.
®
Fig. 131 Con tro l lever : Turning adapt ive cruise co ntro l
off tempo rarily
Fig. 132 D isplay in the speedomete r
Turning control off temporarily
"To shut off the control with the save func
t ion, either depress the brake pedal, or
" Press the lever in the direction of the arrow
@ qfig .131 .
How is the distance (time interval) set?
Applies to vehicles: with adaptive cruise co ntrol
Distance can be set in four stages.
Fig. 133 Contro l lever: Setting d istance
Reactivating control
"To resume the speed and distance control,
release the brake pedal and press the lever
in the direction of the arrow@.
Display in the speedometer
@ Current vehicle speed~ fig. 132
@ Saved speed
As long as a speed is saved the set desired
speed will be displayed in the LED display in
the speedometer by one or two illuminated
red light diodes . When the control function is
resumed the adaptive cruise control acceler
ates to reach the desired speed if no slower
vehicle ahead is detected.
&_ WARNING
Improper use of the adaptive cruise con
trol can cause collisions, oth er accidents
and serious personal injuries.
- Never resume the stored speed if the
speed is too high for prevailing road,
traffic or weather conditions .
(0 Tips
When the system is turned off temporari
l y, the speed set at that time is stored.
Increasing distance
-
" Push the slider switch once to the right 0
q fig. 133 . The distance current ly set is
shown for 3 seconds in the instrument clus
ter display.
" Push the slider switch
again to the right 0
to increase the distance by one step. ..,.
Redu cing distance
"' Push the slider switch onc e to the left 0-
The distance currently set is shown for 3
seconds in the instrument cluster display.
"' Push the slider switch
again to the left 0 to
decrease the distance by one step.
The distance at which the adaptive cruise con trol follows a vehicle in front is determined by
time interva ls. A time interval to a vehicle in
front is established and maintained. Th is pro
duces a speed-dependent interval. The higher
the speed, the greater the safety interva l in
feet (meters)
¢ ,&. .
DISTANCE 1 Ada
pti ve crui se control 119
For example, if the interval DISTANCE 3 is
set, a vehicle in front is fo llowed at a
time in
terval
of 1.8 seconds.
For a speed of
50 mph ( 80 km /h ) this wo uld
be equivalent to a distance of
131 feet
(4 0 meter s) to the vehicle in front.
T he distances given here are nom inal va lues .
T he vehicle speed may exceed or fall shor t of
these target speeds, depending on the driving situation and the driving style of the vehicle
ahead .
DISTANCE 2 DISTANCE 3 DISTANCE4
Symbol c;:::::::;i _ c;:::::::;i _ - - c;:::::::;i _ - c;:::::::;i _ - c;:::::::;i _ - - c;:::::::;i _ c;:::::::;i _ - - _ c;:::::::;i
Time interva l 1 second
1.3 seconds 1.8 seconds 2.3 seconds
Dynamics Sporting Standard Standard Comfortab le
D istan ce at 25 mph 36 Feet (11 Me- 46 Feet (14 Me- 66 Feet (20 Me- 82 Feet (25 Me-
(40 km /h ) ters) ters) ters) ters)
Dist a nce at 50 mph 72 Feet (22 Me -
95 Feet (29 Me- 131 Fee t (40 167 Feet (51
(80 km /h) ters) ters) Meters) Meters)
Distanc e at 75 mph 108 Feet (33 144 Feet (44 197 Feet (60 249 Feet (76
(1 20 km /h) Meters) Meters) Meters) Meters)
H ow your vehicle responds when accelerating
and following other vehicles w ith ACC operat
ing can be adapted to your personal wishes
through diffe rent driving programs. Depend
ing on w hich driving p rog ram and wh ic h dis- tance
you choose, your vehicle will respond
more dynamically or more comfortably when
accelerat ing and braking. The setting is se
lected through the MM I menu
adapt ive cruise
contro l¢
page 124, MMI settings.
Settings DISTANCE 1 DISTANCE 2 DISTANCE 3 DISTANCE4
Symb ol for tim e inter -
val
c;:::::::;i _ c;:::::::;i _ - - c;:::::::;i _ - c;:::::::;i _ - c;:::::::;i _ - - c;:::::::;i _ c;:::::::;i _ - - _ c;:::::::;i
Support fo r: Bumper-to- Bumper-to- Bumper-to- Secondary roads,
bumper traffic, bumper traffic, bumper traffic, trailer operation
brisk driving "keeping pace" "keeping pace"
comfortably comfortably
Re spon se in "d ynam-
1 2 2
3 ic" dri ving program
Resp onse in "stand-
2 3 3 4 ard
" dr ivin g pr og ram
Re sponse in "comfort "
3 4 4 5 driving prog ram
(dynamic) 1 -----2 ----- 3 ----- 4 ----- 5 (comfortab le)
120 Adapti ve crui se control
_&. WARNING
-
Following other vehicles too closely in
creases the risk of a crash and serious per
sonal injury .
- Following other vehicles too closely, par
ticu larly at higher speeds increases the
risk of coll is ions and serious personal in
jury.
- Setting short distances to the traffic
ahead reduces the time and distance
available to bring your vehicle to a safe
stop and makes it even more necessary
to pay close attention to traffic .
- Always select a speed and distance to
traffic ahead that is safe and appropriate
under the prevailing traff ic, road, weath
er and lighting conditions.
- Never rely on the distance control fea
ture of ACC a lone to prevent rear-end col
lis ions. Always be prepared to b rake and
take evasive act io n to avoid co llisions
and other ac cident situations.
- Never allow the clos ing speed between
yo u a nd other vehicles to be so h igh that
the adaptive cruise control may not be
able to slow your vehicle safe ly . If clos
ing speed is too high, yo u m ust app ly the
brakes yourself to reduce the risk of a
rear-end crash.
- Always select a greater following dis
tance to the veh icle ahead on wet roads
than on dry roads.
- Always read and heed the information
and WARNINGS
¢ &. in Description on
page 113.
(D Tips
The distance setting is reset to the factory
default
DIS TANCE 3 the next time the ig
nition is turned on.
Driver information
Displays in the instrument cluster
Applies to veh icles: w ith adaptive cruise contro l
Depending on the driving situation, driver in
formation is displayed in the instrument clus
ter .
Fig . 1 34 Overview ins tr u me nt cluster
@ Speedometer and indica to r li ght d isp lay
@ Display in the instrument cluster
@ Speedometer and indi cato r light
display
Important information concerning vehicle op
eration with adaptive cruise control is shown
in display a rea @. The desired speed you set is
i ndica ted in the speedometer (L ED lights
aro und the edge).
T he ind icator lights show whether the system
has detected a vehicle trave ling ahead .
@ Display in the in strument cluster
In display area @ information from the navi
gation system* and the tr ip computer is dis
played in addition to informat ion about adap
t ive cru ise control.
You can select among the different informa
t io n by repeated brief taps on the
I RESET I but
ton on the w indshie ld w iper lever
c::> page 25,
Operation .
Certain pieces of information in the bottom
part of the d isplay are not shown permanent
ly . Information is displayed only if you set or
change the speed setting, change the time in
te rva l, when messages are disp layed or if the
adaptive cruise contro l is turned off for safety
reasons .
Display in the speedometer
Applies to vehicles: with adaptive cruise control
Fig. 135 D isplay in the speedomete r
Des ired spe ed
The desired speed set by the driver is dis
p layed by a red LED.
If the desi red speed was set between two
lines on the speedometer using the
I SETI but
ton, the two closest light emitting diodes will
come on <=>
fig. 135.
The system a llows only speeds to be set be
tween 20 to 95 mph (30 to 150 km/h) to be
set. This speed range is faint ly illuminated in
the speedometer (LED lights).
Ind icator light s (symbol s)
-- Open road :
The indicator light _
shows that ACC is active and that no moving
vehicle has been detected with in range of the radar sensor up ahead in your lane of
travel. The set speed is maintained.
- - Driving in tr aff ic: The indicator
light - shows that a vehicle moving in
your lane of travel has been detected up
front in your lane of travel. Your speed is ad
justed according to the speed of the vehicle
up front . ACC accelerates and brakes auto
matically within the system's capabilit ies .
-- Driver int erv ent ion prompt: The
red flashing warning light- means
Reque st for dri ver to assum e co ntr ol. You
as the dr iver must slow the vehicle with the
f oot brake. The symbol - tells you
t h at the adaptive cruise co ntrol is not able
to slow the vehicle down enough to keep a
enough distance to the vehicle in front of
you. A warning tone will also sound when
Ad apti ve crui se control 121
the symbol appears. For more information
about the driver intervention prompt
r::!) page 124.
_& WARNING
Improper use of the adaptive cruise con
trol features and inattention can lead to a
crash and serious personal injury.
- Never allow the closing speed between
you and othe r vehicles to be so high that
the adaptive cruise contro l may not be
able to slow your vehicle safely. If clos
ing speed is too high, you must apply the
brakes yo urself to reduce the risk of a
rear-end crash.
- Always select a greater following d is
tance to the vehicle up ahead on wet
roads than on dry roads.
- Always read and heed the information
and WARNINGS <=>
& in Description on
page 113 .
(D Tips
-If you use the accelerator to go faste r
t han t he speed of the vehicle ahead of
you, the dr iver intervention prompt will
not be accompan ied by a warn ing tone.
- If the speed you previously set is exceed
ed, the indicator light in the speedome
ter will switch off.
Display in the instrument cluster
Appl ies to vehicles: wit h adaptive cruise control
F ig. 136 D isp lay in the instrument cluster
-
Scroll through the available information dis
plays by br iefly tapp ing the
I RESET ! button at
the end of the windshield wipe r lever. You can ..,.
122 Adaptive cruise control
select information from the trip 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 approach ing slow ly, the arrow moves
from the
gray zone to the green zone on the
scale .
-Driver intervention prompt : When ap
proaching rap idly, 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 w ill have to take action
c::> page 124, Driv
er intervention prompt.
@Status
- The text ACC: Off appears in white letters
when adaptive cruise control is turned off.
- The text
ACC: Standby appears in white let
ters when the system is turned on but no
desired speed has been set.
- The text
ACC: override appears in white let
te rs when you exceed the desired speed by
acce lerat ing. - The text
DI
STANCE! appears in red letters
when the interva l to a vehicle traveling
ahead is too short and you have to slow your
veh icle additionally with the foot brake.
- The text messages
DISTANCE 1 to DIS
TANCE
4 appear in green letters to indicate
the t ime interval you have set and adapt ive
cruise control is in management mode.
- If the driving program "standard" is re
placed by "comfort" or "dynam ic" 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 : wi th adap tive c ruise contro l
The text messages and symbols shown in this
area of the display are not displayed perma
nently.
Fig. 137 System status indicator
Time intervals (such as.::::::, ____ .::::::,)
The different symbols for the time intervals
(distance) appear if you change the settings
c::>fig. 137.
Three white dots ... appear if a setting cannot
be made w ith the operating lever. The follow
ing are possible reasons
- If you pull the cont ro 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 red uce) speed and this speed is outs ide
Ill>
124 Adaptive cruise control
Stationary object ahead
The text message Stationary object ahead ap
pears, when you want to activate the system
and there is a stationary vehicle or an object
immediately in front of you .
Gradient too steep
The text message Gradient too steep appears
when the max imum gradient for proper ACC
operation has been exceeded. Adaptive cruise
contro l is turned
off . A warning tone also
sounds as a reminder.
Shift lever position!
The text message Shift lever position! ap
pears when the selector lever is moved to po
sition
N . In this position, adapt ive cruise con
trol is not ava ilab le .
Driver intervention prompt
Applies to vehicles: with adaptive cruise co ntrol
The driver intervention prompt calls on the
driver to toke over the situation.
Fig. 138 I n st rument cluste r: Drive r in terven tion
prompt
I n certain situat ions , the braking power of the
adapt ive cr uise control is not enough to main
tain an adequate distance to the vehicle up
ahead. In these situations, the adaptive cruise
control calls the driver to take action.
The
driver intervention prompt alerts you vis
ually and audib ly to take over.
- A red vehicle is shown in the instrument
cluster display ~
fig. 138.
- T he text DISTANCE! appears in the status
line. -
The indicator light- in the speedome
ter blinks red.
- A warning tone sounds.
0) Tips
-Adaptive cruise control is switched off af
ter pressing the footbrake. The speed
saved up this point can be resumed.
- To res um e the saved speed, release the
brake pedal and press the control lever
~ page 118, Turning adoptive cruise
control off temporarily.
-If you use the accelerator to go faster
than the speed of the vehicle ahead of
you, the
driver intervention prompt 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 will switch
off.
MMI settings
Applies to vehicles : with adaptive cruise contro l
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 MMI. This can only be done with
the engine running .
.,. Select:
!CARI function button> Systems*
cont ro l button > adaptive cruise control >
Driving program. Or
.,. Select: !CAR I function button > Car systems *
control button > Driver assist > Adaptive
cruise control
> Driving program .
Setting the driving program
In the Driving program menu you can adjust
the characteristics of adaptive cruise control
to your own preferences using
Dynamic,
Standard
or Comfort.
Saving settings
Your individual settings are automatically
saved and assigned to the remote control key
being used (remote key storage) . If the key is
Iii>
Audi braking guard
Description
Applies to vehicles: with a daptive cruise co ntrol
Audi braking guard warns you of a possible
collision with a moving vehicle up ahead .
Fig. 146 Display in the instrument cluster
The Audi braking guard is active from a speed
of approx. 20 mph (30 km/h) and works with
in the system limits¢
page 125 even when
the adaptive cruise contro l is deactivated.
A radar sensor is bu ilt into the front of the ve
hicle
¢page 114, fig. 127. The system is in
tended to measure the distance to reflective
surfaces .
If a measurement is not possible,
the system does not respond.
When the measurement has been taken, the
system can recognize a possibly hazardous sit
uation, for example, whe n a vehicle up ahead
in your lane of trave l sudden ly brakes or when
your own vehicle is moving at high speed to
wards a much slower vehicle up ahead . As
soon as the system senses that a possible col
lision with the vehicle up ahead can only be
avoided by immed iate full brake application or
by an avoidance maneuver, a warning appears.
The system has a defau lt response time to be
able to signal before a collision occurs. This
system response time is automat ica lly re
duced if you acce lerate actively, fo r example
to join a highway. Braking, transverse acceler
ation and the steering angle can lead to a re
duced system response time. The warning is
deactivated if you begin to overtake with full
acceleration .
Adaptive cruise control 127
The system can make you aware o f two differ
ent hazardous situations:
Distance
The distance warning is given if the system
calculates that there is not enough distance
to the vehicle up ahead a period of more than
S seconds . If the distance is less than 30 feet
(9 meters) at SO mph (80 km/h), for examp le,
an optical display comes on in the instrument
cluster¢
fig. 146.
If the vehicle ahead brakes sharp ly, Audi brak
ing guard cannot help you to avoid a collision,
even in the case of an immediate response.
Take immed iate action to avoid the co llision
and increase the distance to the vehicle up
ahead.
Speed
If there is a much slower vehicle moving up
ahead in your lane, or if the vehicle ahead
brakes sharply, the Aud i brak ing guard calcu
lates the po int from which a collision can only
be avoided by full braking or by an avoidance
maneuver. If a warning does sound, a poss ible
collision with the ve hicle in front can on ly be
avo ided through an evasive maneuver or by
braking.
The warning is given in two stages :
-Pre-warning: A visual display appears in the
instrument cluster and a warning tone
sounds.
- Acute warning: If you do not respond to the
pre-warn ing, the second stage warning is
given. A quick brake application helps to di
rect your attention to the road and traffic
situation.
Under heavy braking, the brake ass istant
¢
page 114 also helps you benef it from maxi
mum brak ing efficiency.
A WARNING
Inatt ention can cause collisions, other ac
cidents and serious personal injuries.
128 Adapti ve crui se co ntrol
-Always pay close attenti on to t he traffic,
even w hen the Aud i brak ing guard is
switched on. The Aud i b rak ing guard pro
vides a warning but does no t brake the
car for you . You m ust apply t he brakes
yours elf!
- Always ke ep the sa fe and legal distance
betwe en your vehicle and veh icles up
ahead.
-Audi braking guard works within limits and w ill not respond outs ide the system
limits, for examp le when approaching a
stopped vehicle or s tationary obstacle
(end of a traff ic jam or veh icle that has
broken down in traffic).
- Always remember th at the radar sensor
f or the A udi braking guard wo rks within
defined detection and range limits that
may prevent the proper detection of oth
er veh icles.
- 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.
- Always pay careful attention to the traf
fic s ituation and be ready to intervene
and be ready to take comp lete control
whenever necessary.
- Reflective surfaces includ ing crash barri
ers or tunnel entrances may impair the
function of th e radar sensor .
Settings in the MMI
Applies to vehicles: with a daptive cruise co ntrol
The settings of the Audi braking guard are
performed in the MMI.
.. Se lect : I CAR I funct ion button > Systems *
control button > Audi braking guard . Or
" Se lect :
I CAR I funct io n button > Car systems *
control button > Driver assist > Audi brak
ing guard .
- System -
the Audi braking guard system can
be switched
On and Off .
-Early warning -the acoustic warning and
the messages can be switched
On and Off .
(D Tips
When handing ove r the keys to another
person, the p revious settings are adopted
i f the Audi braking g uard is activated
¢ page 43.
Driver's information in the instrument
cluster display
App lies to vehicles : wit h adaptive cruise contro l
Braking guard activated
Th is message appears when the Aud i b ra ki ng
guard applies the brakes du ring a second
st age (a cute) war ning .
Braking guard off
This message appears when the system has
been deac tivated via the MMI. This message
also appea rs br iefly at each beginn ing of a t rip
i f t he sys tem is swi tched off .
The message a lso appears if the system is not
ava ilable due to a malfunc tion or if the ESC is
not sw itched on¢
page 225 . If th is is the
case, the system will not provide wa rni ngs
abo ut a po ssible coll ision.