2014 AUDI Q7 cruise control

Adaptive cruise control Speed and distance
control system
Description
Applies to vehicles: with adaptive cruise cont rol
The adaptive cruise control driver assistance
program is a combined speed and distance
control system .
Fig . 126 Front bu mper: Pos itio n of r adar sen sor (not
vi sibl e from out side)
Adapt ive cruise control can he lp ma ke driv ing
more relaxed and less tiring , particularly dur­
i n g long trips on interstates or other hig hways
that are genera lly st raight. The system can al­
so ass ist in stop and go traffic .
The adaptive cruise co ntrol works within a
speed range be tween 0 and 95 mph (150 km/
h). Set ACC to maintain a constant , legal trav ­
el speed between 20 and 95 mph (30 -150
km/h) that is appropriate for prevailing traffic
conditions. Select a following distance to the
veh icle ahead and ACC will adjust your speed
to maintain that d istance down to a stop . At a
speed below 20 mph (30 km/h), the min imum
speed setting of 20 mph (30 km/h) will be se­ l ected automati ca lly.
Adaptive cruise control has technical limita­
tions that you must know, so p lease read th is
section carefully , understand how the system
wo rks and use it properly at a ll times.
How does it work?
You can operate the adaptive cruise control
using the lever on the steering wheel column
c::> page 116, How is the speed stored? and
Ad apti ve crui se control 11 3
c::> page 118, How is the distance (time inter ­
val) set? .
Driver information
Important information is brought up in the
speedomete r and in the instr ument clus ter
display as the vehicle is being driven
c::> page 120, Driver informat ion .
What is important for you to know
The adaptive cru ise contro l is set w ith system­
spe cified lim its; that is, as a driver, you will
have to adjus t the speed and distance to the
vehicle ahead in some instances
c:> page 124,
Driver intervention prompt
and c::> page 125,
System limitations.
A WARNING
Imp roper use of the adaptive cruise con­
trol can cause collisions, other accidents
and serious personal injury.
- Always remember that the adaptive cru ise contro l has limits -it will not slow
the vehicle down or ma inta in the set d is ­
tance when you dr ive towards an obsta­
cle or someth ing o n or nea r the road that
is not movi ng, such as ve hicles stopped
in a tra ffic jam, a sta lled or d is ab led vehi­
cle.
- Always remembe r that the adaptive
cru ise con tro l canno t detect a vehi cle
that is driving towards yo u in your traffic
lane and that it cannot detect narrow
vehicles s uch as motorcycles and bicy­
cles.
- Never drive at speeds that are too fast
for traffic, road and weather conditions.
- Never follow a vehicle so closely that yo u
cannot stop your vehicle safely. The
adaptive cruise control cannot s low or
brake the vehicle safely when you follow
another vehicle too close ly. Always re­
membe r that the adaptive cruise control
has a braking powe r th at is o nly about
30% of the veh icle 's maxim um braking
ab ility. The a uto mat ic bra kin g f unction
canno t bring the veh icle to a s udden or
emergency stop . Always be p repared to
-

114 Adapti ve crui se co ntrol
brake and take evasive action to avoid
collisions and other accident situations.
- Never allow the closing speed between
you and other vehicles to be so high that
the adaptive cruise control may not be
able to slow your vehicle safely. If clos­
ing speed is too high, you must apply the
brakes yourself to reduce the risk of a
rear-end crash .
- Never rest your foot on the accelerator peda l, especia lly when the adaptive
cruise control is be ing used. Pressu re on
the accelerator w ill override the ACC
braking function and prevent the brakes
from being applied when ACC detects a situation when the brakes must be ap­
plied.
- Never use adaptive cruise contro l when
you cannot drive safe ly at a steady
speed, including on city streets, on wind­
ing roads or when road conditions are
poor (for example, on ice, gravel, in fog,
heavy rain or on wet roads that increase
the risk of hydroplaning) .
- The radar sensor 's
vision can be reduced
by rain, snow and heavy road spray .
T hese and sim ilar condit ions can prevent
vehicles up a head from being accurately
detected and in some cases they may not
be detected at al l. Do not use ACC when
the radar sensors cannot accurately de­
tect vehicles moving ahead of yo u in traf­
fic .
- Always turn off adaptive cruise contro l
when entering turn lanes , exit lanes and
construction zones or in similar situa­
t ions 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 be ing used .
(D Tips
-For safety reasons, the stored speed is
deleted when the ignition is turned off .
- The E lectronic Stab ilizat ion Control (ESC)
i s automatically turned on when the
adaptive cruise control is turned on. You cannot switch the ESC into offroad mode
w hile the adaptive cruise contro l is
t u rned on
<=> page 225.
-Damage caused by accidents and some
mino r collisions can affect the radar sen­
sor settings and cause the system to
malf unction or switch off completely.
- The radar sensor cover is heated. In win ­
ter conditions, you should st ill check be­
fore dr iv ing to make sure it is free of ice
and snow. If necessary, clean the area
near the radar sensor carefully
<=> fig . 126 .
-To ensure that the radar sensor is not
blocked, foreign objects (e.g . stickers,
larger license plate mounts, add-on
parts) mus t not cove r the area near the
rada r senso r<=>
fig. 126. The are a near
the radar sensor m ust not be pa inted, e i­
ther.
- For Declaration of Comp lia nce to United
States FC C and Ind ustry Canada reg ula ­
tions
<=> page 319.
How does adaptive cruise control work?
Applies to vehicles: wi th adap tive c ruise contro l
Vehicles traveling ahead are detected with
the aid of a radar sensor.
F ig. 127 Basic p rin ci pl e diag ram: Rada r se nso r me as­
urement ra n ge
Adaptive cruise cont ro l uses a radar senso r in
the front o f the vehicle<=>
fig. 12 7. The sys tem
has limitations <=>
page 125 . Things that are
not moving in your lane and in your direction
of t rave l will not be detected. The sensor
measures the distance to reflect ive surfaces
tha t must have a ce rt a in s ize. The system re­
spond s on ly after the distance measurement ..,.

has been made. If a measurement is not pos ­
sib le, the system cannot respond and wi ll not
react to a vehicle or someth ing else up ahead .
Open road
When the road is clear , the adaptive cru ise
control wo rks like cruise control.
It maintains
a constant target speed specified by the driv­
er.
Driving in traff ic
If a slower vehicle d riving ahead is detected,
the adaptive cru ise contro l decelerates (wi thin
the limits of the system) ¢
page 124, Driver
intervention prompt
and ¢ page 125, System
limitations
to its speed and after adjusting,
tr ies to maintain the set distance from the ve­
h icle ahead. The vehicle may temporarily drive
slower than the set speed while adjusting
¢ .&. in Description on page 113 .
If the vehicle in front accelerates, adaptive
cru ise control also accelerates up to the speed
t ha t you have set.
I f the vehicle ahead slows to a stop , ACC will
slow yo ur vehicle down and to a complete
s top if this is possible w ith in the system's lim­
its and capabilities. ACC will not make an
emergency stop . The text message
ACC off:
manual control! appears in the instrument
cluster display. Once the veh icle stops, you
must dep ress the brake pedal to prevent the
veh icle from mov ing forward or "creeping" .
Depressing the brake pedal turns
off ACC.
When the vehicle ahead accelerates yo u can
reactivate ACC
¢ page 118, as soon as your
vehicle has reached a speed of 1 mph (2 km/
h) .
Situat ion s requiring dri ver int ervention
In some situations you wi ll have to use the
footbrake to s low the vehicle down in order to
k eep a safe distance from vehicle in front of
you or to avo id a rear -end coll is ion. In this sit­
uation, a symbol appears and a warning tone
sounds ¢
page 124 .
Adapti ve crui se control 115
Passing another vehicle
If you move into the passing lane and no ve hi­
cle is detected ahead , the adapt ive cr uise con­
trol acce le rates to the speed you have set and
maintains it.
Overr iding ACC
You can in cr ease yo ur speed at a ny time by
stepping on the accelera tor ped al. A fter you
release the accelerator peda l, the system ad­
justs back down to the speed you prev ious ly
set .
Reducing stopp ing distance
If the radar sensor detects that the d istance
to the vehicle a head is less than de fined m ini­
mum distance, the brakes are automatically
prepared fo r emergency braking by the d river .
The brake pads are moved very close to the brake d iscs without actually braking the vehi­
cle. This brake assistant feature reacts more
quick ly to the dr ive r's brak ing, and also works
when adapt ive cruise control is
off . The stop­
ping distance is reduced as a result of th is ad­
vance brake p reparation . Th is fun ction does
not perform any emergency b rak ing mane u­
vers by itse lf; the dr iver mus t always apply the
brakes.
A WARNING
If ACC initiates a braking maneuver, the brake pedal w ill be retracted. Inter ference
with the brake peda l can prevent ACC from
slowing the veh icle down and cause a
crash and serious personal injury.
- Never put anything in the driver's foot­
well or let anyth ing fall into it. An object
in the driver's footwe ll can inte rfe re with
the peda ls and prevent the acce le rator
from being used to override ACC or pre­
vent ACC from being switched
off when
the brake pedal is depressed and also
prevent the vehicle from being slowed
down or stopped .
- Onl y use floor mats that keep the area
aroun d the peda ls free and that can be
securely fastened to the footwell .
-

116 Adapti ve crui se control
-Never drive with you r foot underneath
t h e brake pedal.
- Always read and heed the information
and WARNINGS
c:;, .&. in Description on
page 113.
A WARNING
- Never rely on the distance control fea­
ture of ACC alone to prevent rear-end col­
lisions . Always be prepared to brake and
take evasive action to avoid collisions and other acc ident situations.
- Never allow the clos ing speed between
yo u and other vehicles to be so h igh that
the adaptive c ruise control may not be
able to slow your vehi cle safe ly. If clos ­
ing speed is too high, you m ust app ly the
brakes yourself to reduce the risk of a
rear-end crash.
(D Tips
Please note that t he amo un t of a ccelera­
tion the adapt ive cr uise control uses de­
pends on the Distance setting selected .
DISTANCE 1 g ives you acce lerat ion that is
dynamic and sporty. DISTANCE 4, on the
other hand, gives more moderate acce lera­
tion. For more information about the time
intervals
c:;, page 118 , How is the distance
(time interval) set? .
-Please note that if the adaptive cruise
control has begun braking the vehicle
and the d river chooses to brake the vehi­
cle add itiona lly, t he b rakes may fee l
"h ard". This is simply due to the pressure
b uild- up of the initial b raking.
- Adaptive cruise control is sw itched off af­
te r pressing the footbrake. The speed
saved u p this poin t can be resumed. To
res ume the saved speed, release the
b rake pedal and p ull th e control leve r to­
ward you
c:;, page 118 , Turning adaptive
cruise control off temporarily .
Switching the system on and off
Applies to vehicles: with adaptive cruise contro l
Fig. 128 Control lever: Sw itching on and off
S w itching the sy stem on
.,. Pull the lever to position © c:;, fig. 128.
Switching the system off
.,. Pres s the lever to posit ion @ (latched).
How is the speed stored?
Applies to vehicles: wit h adaptive cruise contro l
,' ts ~:_" ';;;", ' , E Sl'EEO CANCELU
. T ,0. -ON ... . RESUME~
Fig. 1 29 Co ntrol lever: Storing s peed
With the sy stem switched on the speed is
stored as follows:
• Dr ive at the speed you want .
.,. Press the
ISE TI button c:;, fig. 129 to store
the desired speed.
After the
ISE TI button is re leased, the current
speed is stored and maintained . If you are
driv ing at a speed below 20 mph (30 km/ h),
the minimum speed setting of 20 mph
(30 km/h) will be set .
The saved speed is now shown in the LED d is­
play in the speedometer by one or two illumi­
nated red light d iodes
c::> page 121. At the
same time, the saved speed is also shown for ..,.

a short time in the Information line
¢ page 122.
@ Tips
For safety reasons, the stored speed is
erased when the ignition or the ACC is
turned off.
Changing stored speed
Applies to vehicles : with adapt ive cruise control
The speed can be changed without touching
the accelerator or brake pedal .
Fig. 130 Contro l leve r: Changing speed
Inc re as ing speed
• Press the lever briefl y upwards 0
9 fig. 130. 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 ho ld the control switc h down,
the lig ht diode display in the speedome ter
L E D display in the speedometer moves for­
ward and the speed is increased.
R educing speed
• Press the lever briefly downwards Q . USA
models: the speed decreases by 2.5 mph .
Canada models: speed w il l decrease by one
mark on the speedometer scale.
• Press the lever downwards
O and hol d it.
As long as you hold the control sw itch down,
the lig ht diode display in the speedometer
LED display moves backward and the speed
is reduced .
After releasing the control switch, the system regulates the speed to the value just set.
Ad apti ve crui se control 11 7
After each adjustment, the newly-set speed is
shown for a short time in the Information line
9page 122 .
_& WARNING
Improper use of the adaptive cruise con­
trol features and inattent ion can lead to an
accident causing ser ious personal injury.
- It is dangerous to use the "RESUME" fea­
ture when the prev iously set speed is too
high for existing road, traff ic or weather
conditions.
- Always read and heed the information
and WARNINGS
¢.&. in Description on
page
113 .
(D Tips
You can increase your speed at any time by
stepp ing on the accelerato r pedal. After
you release the acce lerator pedal, the sys­
tem adjusts back down to the speed you
p reviously set . A new desired speed can be
stored a t any time by press ing the
!SE TI
button 9page 116, fig. 12 9.
-

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 .