2015 AUDI A7 brake

82 On the road
lever position and take your foot off the brake
pedal.
If you select the R position during a Stop
phase, the eng ine will start aga in.
Shift from
D to P quickly to prevent the engine
from starting unintentionally when shifting
through
R.
You can determ ine for yourself if the eng ine
will stop or not by reduc ing or increasing the
amount of force you use to press the brake
pedal. For example , if you only lightly press
on the brake pedal in stop-and and-go traff ic
or when turning, the engine will not switch off
when the vehicle is stationary . As soon as you
press the brake down harder, the eng ine will
switch off.
General information
Applies to vehicles: with Start-Stop-System
The standard Start-Stop-mode can be cancel­
led for different system-related reasons .
Fig. 85 Instrum ent cluster: engine -Stop tempo ra ril y
u navailab le
Engine will not switch off
Before each stop phase, the system checks i f
certain cond it ions have been met. For exam ·
p le, the engine will
not be switched off in the
following situations:
- T he eng ine has not reached the minimum
required temperature for Start-Stop-mode .
- The inter ior temperature selected by the A/C
system has not been reached .
- T he outside temperature is extremely high/
low .
- T he w indshield is being defrosted
¢page 71, ¢ page 73.
- The parking system* is switched on.
- The battery charge level is too low.
- The steering wheel is sharply turned or
there is a steering movement.
- After engaging the reverse gear .
- On sharp inclines.
The
fjJ indicator light appears in the informa­
tion line in the instrument cluster display
¢fig . 85.
Engine automatically restarts
The stop phase is interrupted in the following
situations, for example. The engine restarts
without any action by the driver .
- The interior temperature varies from the
temperature selected in the A/C system .
- The windshie ld is being defrosted
<:!;>page 71, ¢page 73.
-The brake pedal is pressed several times in a
row .
- The battery charge level becomes too low.
- High power consumption.
Switching the ignition off automatically
To prevent the battery from drain ing, the igni­
tion w ill switch off
automatically when all of
the following conditions have been met :
- The vehicle has already been driven.
- The engine has been turned off by the Start-
Stop -System*.
- The driver's door is opened.
- The driver's seat belt is removed .
- The brake pedal is not pressed down.
- The vehicle is stationary .
In this case, the activated low beam will be re­
placed by the side marker lights. The side
marker lights will switch off afte r approxi ­
mately
30 minutes o r when you lock the veh i­
cle.
If the Start-Stop System has
not turned off
the engine or if you have sw itched the Start­
Stop system off manually, the ignition will
not
be automat ically switched off and the eng ine
will continue to ru n
c:!;> ,& . ...,

84 On the road
You can set any threshold between 20 mph
(30 km/h) and 150 mph (240 km/h). Settings
can each be adjusted in increments of 6 mph
(10 km/h).
Cruise control
Switching on
Ap plies to vehicles: with c ruise con tro l
The cruise control system makes it possible to
drive at a constant speed starting at 20 mph
(30 km/h).
0
f
~
0
Fig. 87 Con tro l lever w it h set bu tton
Fig. 88 Display : Selected speed
• Pull the lever to position (D c:> fig. 87 to
switch the system on.
• Drive at the speed you wish to set.
• Press button @to set that speed.
The stored speed and the indicator light
II (US models) ;ii (Canadian models) ap­
pear in the instrument cluster display
cc> fig. 88. The display may vary, depending on
the type of d isplay in your vehicle .
This information is also shown briefly in the
Head-up Display*.
The speed is kept constant v ia an engine out­
put adjustment or active brake intervention .
A WARNING
--Always pay attent ion 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.
- For safety reasons, the cruise contro l
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
p lan ing) -risk of accident .
- Turn off the cruise control temporarily
when entering turn lanes, highway exit
lanes or in constr uction zones .
- Please note that inadve rtently "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 cruise con­
trol system is switched on, the braking
function in the system may be sw itched
off. The other cruise control functions re­
main active as long as the indicator light
II (US models)/ ... (Canadian models)
is on.
(D Tips
The brake lights illuminate as soon as the
brakes decelerate automatically .
Changing speed
Applies to vehicles: with cruise control
• To increase/decrease the speed in incre­
ments, tap the lever in the
0 10 direction
c:> page 84, fig. 87
• To increase/decrease the speed quick ly, hold
the lever in the
010 d irect ion until the de­
sired speed is displayed .
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. ..,.

M N <( (.J
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
If, however, you exceed your saved speed by
6 mph (10 km/h) for longer than 5 minutes ,
the cruise contro l will turn off temporarily.
The green symbol
Ill (US models) t lil (Cana­
d ian models) in the display will go out but the
saved speed remains the same .
Presetting your speed
Applies to vehicles: with cr uise contro l
You con preset your desired speed while the
vehicle is not moving.
~ Switch on the ignition.
~ Pull lever into pos ition @ c:> page 84,
fig. 87.
~ Press the lever in the 0 or 0 direction to
increase or decrease yo ur speed .
~ Release the lever to save that speed .
T his funct ion makes i t possible, for example,
to save the speed you want before driving on
the highway . Once on the hig hway, activate
the cruise cont ro l by pull ing t he lever towa rd
@ .
Switching the system off
Appl ies to vehicles: with cruise con trol
Temporary deactivation
~ Press the bra ke peda l, or
~ Press the lever into pos ition @ (not clicked
into place)
c:> page 84, fig . 87, or
~ Drive for longer than 5 minutes at more
than 5 mph (10 km/h) above the stored speed .
Switching off compl etely
~ Press lever into posi tion @(clic ked into
place), or
~ Switch the ignition off.
The system reta ins the saved speed i f yo u de ­
activa te t he cr uise con trol temporarily. To re­
sume the saved speed, release the brake ped­
al and pull the lever to position@.
Sw itching the ign ition off erases the saved
speed .
On th e ro ad 85
A WARNING
You shou ld only return to the saved speed
if it is not too fast for the current traffic
conditions - r isk of an accident!

86 Audi adapti ve cruise control and bra king gu ard
Audi adaptive cruise
control and braking
guard
Introduction
App lies to vehicles: with Audi adaptive cruise co ntrol
The adaptive cruise control system assists the
driver by regu lat ing 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. This helps 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
c:::> page 92.
Adaptive cruise control and braking guard
have technical limitations that you must
know, so please read this section carefully, un­
derstand how the system works and use them
properly at all times.
General information
General information
Applies to vehicles: with Audi adaptive cruise control
Fig. 89 Front of th e veh icle: senso rs and video camera
The areas that conta in the radar and ultrason­
ic sensors and the v ideo camera
c:::> fig. 89
must neve r be cove red by stic kers or other ob­
jects or obstructed w ith dirt, insects, snow or
i ce that will interfere with the adaptive cruise
control system and braking guard. For infor­
mation on cleaning, refer to
c:::> page 212. The same applies for any modifications made in
the front area.
T he function of the adaptive cru ise contro l
system and braking guard is limited under
some cond itions:
- Objects can only be de tected when they are
w ith in sensor range
c:::>page 88, fig. 92.
- The system has a limited ability to detect
objects that are a short d istance ahead, off
to the side of your vehi cle or mov ing into
your lane.
- Some kinds of ve hicles are hard to detect;
for examp le motorcycles, veh icles with high
ground clearance or overhanging loads may
be detected when it is too late or they may
not be detected at all.
-When driving through curves
c!,>page 87 .
-Stat ionary objec ts c:::> page 87.
& WARNING
A lways pay attention to traffic when adap ­
tive cruise contro l is switched on and brak­
ing g uard is active. As the dr iver, you are
still respons ible for starting and for main­
taining speed and distance to other ob­
jects. Braking guard is used to assist you .
The dr iver must a lways take action to avo id
a collis ion . The driver is a lways respons ible
fo r braking a t the co rrec t time.
- Imp roper use of adaptive cru ise control
can cause collisions, other acc idents and
serious pe rsonal in jury.
- Never let the comfort and convenience
that adaptive cruise control and braking gua rd offer d istract you from the need to
be alert to traffic condit ions and the
need to rema in in fu ll control of your ve­
h icle at a ll times,
- Always remember that the adaptive
cruise control and braking guard have
limits -they will not s low the vehicle
down or maintain the set distance when
you drive towards an obstacle or some­
thing on or near the road that is not
mov ing, such as vehicles stopped in a
traffic jam, a stalled o r disabled vehicle.
I f registered by the radar sensors,

M N <( I.J "". rl I.O
"' rl
"' rl
Audi adapt ive crui se c ontrol an d bra kin g guard 8 7
vehicles or obstacles that are not moving
can trigger a collision warning and if con­
firmed by the video camera, an acute col­ lis ion warn ing.
- For safety reasons, do not use adaptive
cruise control 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 itions cou ld result in a co lli ­
sion .
- Switch adaptive 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
celerating to the set speed when in these
situations .
- The adapt ive cru ise control system w ill
not brake by itse lf if you put your foot on
the accelerator pedal. Doing so can over­ ride the speed and distance regulation .
- When approaching stationary objects such as stopped traffic, adaptive cruise
control 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
ima ls, objects crossing the road o r on­
coming objects .
- The function of the radar sensors can be
affected by reflective objects such as
guard ra ils, the entra nce to a tunnel,
he avy rain or i ce.
- Never follow a veh icle so closely that you
cannot stop your vehicle safe ly. The
adaptive cruise cont ro l c anno t slow or
brake the veh icle safely when you follow
another vehicle too closely. Always re­
member that the automatic braking
funct ion cannot bring the veh icle to a
sudden or emergency stop under these
condit ions .
- To prevent unintended operation, always
switch ACC off when it is not be ing 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 le r or a u­
thorized Audi Serv ice Facility check their
funct ion.
In curves
Applies to vehicles: with Audi adaptive cruise control
I
F ig. 90 Ex ample: dri vin g in to a curve
When dr iving into a curve c:> fig. 90 and out of
a cu rve, the ad aptive cruise con trol 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 accelerator pedal b riefly.
Stationary objects
Applies to vehicles: with Audi adaptive cruise control
Fig. 91 Ex ampl e: object chang ing l anes and sta tio nar y
ob jec t
The adaptive cru ise con tro l system only reacts
to objects that a re mov ing o r th at the system
has a lready detected as moving . For examp le,
if a veh icle @, which has a lready been detect-
ed by the adaptive c ruise contro l, tu rns o r
changes lane s and another stationary vehicle .,._

88 Audi adaptive cruise control and braking guard
@ is located in front of that vehicle, the sys­
tem will not react to the stationary vehicle.
Audi adaptive cruise control
Description
Applies to vehicles: with Audi adaptive cruise control
Fig. 92 Detection range
What can adaptive cruise control do?
The adaptive cruise control system uses video,
radar and ultrasou nd. Moving vehicles ahead
can be recognized up to about 650 feet (200 m) away.
On open roads w ith no traffic, adaptive cruise
control works like a regular cruise control sys­
tem. The stored speed is maintained. When
approaching a moving vehicle detected up
ahead, the adaptive cruise control system au­
tomatically s lows down to match that vehi­
cle's speed and then maintains the distance
that the driver previous ly stored. As soon as
the system does not detect a vehicle up
ahead, adaptive cruise control accelerates
back up to the stored speed.
In stop-and-go traffic, adapt ive cru ise control
can brake until the vehicle stops and acceler­
ate again under certain conditions and if this
is possible within the system's limits and ca­
pabilities¢
page 90. Adaptive cru ise control
will not make an emergency stop .
Which functions can be controlled?
When you switch adaptive cruise contro l on,
you can set the current speed as the "control speed" ¢
page 88, Switching on and off.
When driving, you can stop cruise control
¢
poge 90 or change the speed ¢ page 89
at any time.
You can also set the distance to the object
ahead and set the adaptive cruise control driv­
ing program ¢
page 90.
Switching on and off
Applies to vehicles: with Audi adaptive cruise control
Fig. 93 Se lector lever: switching on/off
Fig. 94 Instrument cluste r: adaptive cruise control
You can set any speed between 20 mph and
95 mp h (30 and 150 km/h).
Ind icator lamps and messages in the instru­
ment cluster d isplay inform you about the cur­
rent system status and settings.
An additional indicator appears in the Head­
up D isplay*.
Switching adaptive cruise control on
.,. Pull the lever toward you into position (D
¢ fig. 93. ACC standby appears in the in­
strument cluster display.
Setting the speed and activating
regulation
.,. To set the current speed, press the ISETI but­
ton¢
fig. 93. The set speed is shown in the 1111-

Audi adaptive cruise control and braking guard 89
tachometer @and is also shown briefly in
the display @
c::> fig. 94.
.. 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 place. The message
ACC off appears.
@ Indicator lights
II-Adaptive cru ise contro l is switched on.
No vehicles are detec ted up ahead. The stored
speed is ma intained.
• -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 automatical ly.
fit -Adaptive cruise contro l is switched on. A
mov ing vehicle up ahead was detected. Your
vehicle remains stopped.
• -When automatic brak ing is not able to
keep enough distance to a previously detected
moving vehicle up ahead, you must take con­
trol and brake
c::> page 91, Prompt for driver
intervention.
© Display
If adaptive cruise control is not shown in the
d isp lay, you can call it up with the multifunc­
tion steering wheel buttons
c::> page 24.
Based on the symbols in the d isplay, you can
determine if the system is maintaining a dis­
tance to the vehicle ahead and what that d is­
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
c::> page 91.
Both arrow s 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
distance. For information on changing the
stored distance, refer to
c::> page 90 . If the
distance selected is too close or may soon be­
come too close, the arrows move into the red
zone 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 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.
- Th e elec tronic stab ilization control (ESC)
and the anti-slip-regulation (ASR) are au­
tomatically turned on when the adaptive
cruise control is turned on. Both systems
cannot be turned off if the adaptive
cruise contro l is turned on.
Changing the speed
Applies to veh icles: with Audi adaptive cruise control
0
f
• 0
Fig . 95 Se lector lever: chang ing the speed
.. To increase or reduce the speed in incre­
ments,
tap the lever up or down.
.. To increase or reduce the speed quickly,
hold
the lever up or down until the red LED @
reaches the desired speed
c::> page 88,
fig . 94.
~

90 Audi adaptive cruise control and braking guard
Following any changes, the new stored speed
will be disp layed briefly in the disp lay @
r::!) page 88, fig. 94 .
Driving in stop-and-go traffic
Applies to vehicles: with Audi adaptive cruise control
The adaptive cruise control system also as­
sists you in stop-and-go traffic. If a previous
detected vehicle ahead stops, your vehicle will brake to a stop, within the limits of the sys­
tem.
• To resume driv ing with adaptive cruise con­
trol, tap the accelerator pedal or
• Pull the lever toward you into posit ion @
r::!) page 90, fig. 96 .
(D Tips
-If adaptive cru ise control is active and
your vehicle does not start driving as ex­
pected after pulling the lever once, you
can start out again by tapping the accel­
e rator pedal.
- If an obstacle is detected when your ve­
hicle starts driving, the system w ill
prompt you to take over¢
page 91.
Your vehicle will drive more slow ly when
starting. This may a lso happen in some
situations when no obstacle is apparent.
Interrupting cruise control
App lies to vehicles: with Audi adaptive cruise co ntrol
Fig. 96 Se lector leve l
Requirement: adaptive cruise control must be
switched on.
Overriding cruise control
• To accelerate manually, pull the lever to­
ward you into position@and hold it there.
The message
ACC override appears. Or
• press the acce lerator pedal.
• To resume cruise contro l, re lease 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 pedal.
• 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 contro l, press the brake
pedal and pu ll the lever toward you into po­
sition @.
_&. WARNING ~ -
Never resume the stored speed if the
speed is too high for prevailing road, t raf­
fic or weather condit ions.
Setting the distance
Applies to vehicles: wit h Audi adapt ive cruise control
Fig. 97 Selecto r lever : setting the distance
• Tap the switch to display the current set dis­
tance
<=> fig. 97.
.,. To increase or reduce the distance by incre­
ments, tap the switch again to the left or
r ight. The distance between the two vehicles
w ill change in the instrument cluster dis-
play . ..,.