2015 AUDI A8 sensor

48 Clear vision
Automatic headlights
You can adjust the following settings in the
Automatic headlights menu:
Headlights a ctivation time -You can adjust if
the head lights switch on
Early , Med. or Late
according to the sensitivity of the light sensor.
Audi adaptive light* -You can switch adaptive
light
On and Off.
Automatic high beams*
You can switch the high beam assist on and
off .
Daytime running lights
USA models :
You can switch the daytime run ­
ning lights
on and off .
Canada models:
The function cannot be
turned off. It is activated automatica lly each
time the ignition is switched on . This menu
item is shown "greyed out".
Coming home, Leaving home
The coming home function illuminates the
area outside the vehicle when you switch the
ignition off and open the driver's door. To turn
the function on, select
Lights when leaving
car> On.
The leaving home function illuminates the
area outside the vehicle when you un lock the
ve hicle . To turn the funct ion on, select
Lights
when unlocking car > On .
The coming home and leaving home functions
on ly operate when it is dark and the light
switch is in the
AUTO position.
Turn signal and high beam lever
The lever on the left side of the steering col­
umn is used to operate the turn signals and
the high beam as well as the headlight flash­
er.
Fig. 42 Tu rn signal and high beam lever
The turn signa l and high beam lever has the
following functions:
Turn signals ¢ 9 (D@
.. Push the lever up as far as it can go to turn
on the right turn signal or down to turn on
t he left turn signal
¢ fig. 42 .
N 0 ... 'i' :r
~
.. Move the lever briefly until you meet res ist·
ance and re lease it to flash three times.
.. Move the lever (up or down) until you meet
resistance and hold it there to determine
the flashing time for the turn signals.
High beam [D @
.. Push the lever forward to switch on the high
beam (vehicles with high beam assist*
¢page49).
.. Pull the lever back towards you to switch off
the high beam .
Headlight flasher [D ©
.. Pull the lever toward the steering wheel to
use the headlight flasher.
Notes on these features
-The turn signals only work w ith the ignition
switched on. The indicator lights
ID or iPJ
in the instrument cluster ¢page 11 also
blink.
- After you have t urned a corner, the turn sig -
na l switches off automatically .
Ill>

,....,
N ,....,
N
0 J:
'SI: ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
-The high beam works only when the head­
lights are on. The indicator light
II in the
instrument cluster ill uminates when the
high beams are on.
- The
headlight flasher works only as long as
you hold the lever -even if there are no
lights turned on. The indicator light
II in
the instrument cluster illum inates when you
use the head light flasher .
A WARNING
Do not use the high beam o r headlight
flasher if you know t hat these could blind
on coming traffic.
High beam assist
A ppl ies to vehicles : wit h high bea m ass ist
-
The high beam assist automatically switches
the high beams on or off, depending on the
surroundings and traffic conditions.
F ig. 4 3 Tu rn signa l an d h igh beam lever: Turning on
and off t he h igh beam ass ist
Activating high beam a ssist
Requirement : The light sw itch must be in the
AUTO position, the low beam headlights must
be on and the high beam assist must be
sw itched on in the Infotainment~
page 47.
.. Press the lever forwards (Din order to acti-
vate the high beam ass ist. The indicator
light
IIJ turns on in the inst rument cluste r
display and the high beams switch on or off
automati ca lly. The indica to r ligh t
Iii turns
on if the high be ams were switched on.
Switching the high beams on /off
manually
R equi rement : Hig h beam ass ist is activated.
Clear v is ion 49
If the high beams d id not swi tch on/off auto ­
matically when expected, you may instead
switch them on/off manually:
.. To swi tch the high beams on manually, press
the lever forwa rds (D. The indicato r light
Bl
turns on.
.. To switch the high beams off manually, pull
the lever backwards @. The high beam as­
sist is deactivated .
Operating the headlight fla sher
.. To operate the flashe rs while the high beam
assist is active and the high beams are
sw itched off, pull the lever into posit ion @.
The high beam assist will remain active.
Messag es in the instrument cluster
di splay
Headlight ass ist: System fault
Drive to your authorized A udi dealer immedi­
ate ly to have the ma lfunction corrected. Yo u
can still switch the high beams on or off man­
u ally.
Headlight assi st: Unavailable . No camera
view
T he came ra v iew is b locked, for example by a
sticker o r debr is.
The sensor is loca ted between the inter io r
r earvi ew mirror and the w indshield . There­
fo re, do not p lace a ny s tick ers i n this a rea on
t h e windsh ie ld.
Service setting
There is a different sensit iv ity sett ing for serv­
ic ing . T hi s sett ing can be activated by pressing
and holding the b utton on the int erio r r ear­
view m irror for more tha n 18 seconds. The
L E D next to the button blinks th ree times.
If
yo u have accidentally se lec ted this service
function, the origi nal sensitivity will be auto­
matically restored the next t ime yo u sw itch
the ignit ion on.
IJ>,

50 Clear vis ion
& WARNING
H igh beam assist is only intended to assist
the driver. The driver is still responsible for controlling the headlights and sw itching
th e high beams on and off manually de­
pending on traffic, l ighting and visibility
condi tions. Failure to intervene manually
may lead to ris k of accident . It may be nec­
essary to operate the high beams man ua l­
ly in the following situat ions, e.g .:
- For adverse weather conditions such as
fog, heavy rain, blowing snow or spraying
water .
- On roads where oncoming traffic may be
partia lly obsc ured such as expressways .
-If there are individuals on the road with
no light ing or poor lighting, such as cy ­
cl ists .
- In tight c urves and on steep s lopes .
- In poorly lit areas.
- With strong reflectors su ch as signs.
- If the area of the windshie ld nea r th e
sensor is fogged over, dirty, icy or cov­
ered w ith a st icker.
(D Tips
- The high beam ass ist is active above a
speed of approx . 25 mph (40 km/h).
- If afte r activation, your speed falls below
approx . 15 mp h (24 km/h), the high
beams w ill automatically be switched
off.
Interior lights
Front and rear interior lighting
Fi g. 44 Headliner: Front interior lights
F ig. 45 Rear headli ner : Read ing light
Press the app ropriate button ~ fig . 44:
~ -Inter ior light ing on/off
l!l -Door contact switch. The interior lighting
turns on automatically when you u nlock the
vehicle, open a door or switch the ignition off.
The interior light ing turns off several seconds
after you close the doors, when you lock the
vehicle or when you switch the ignition on.
When a doo r is open, the light turns off after
a few min utes.
~ -Read ing lights on/off
~ - Switching the rear reading lights on/off
from the cockpit .
I REAR MODEi* -Switching the rear readi ng
li ghts on/off from the cockpit : press the
I REAR MODE ! button and then th e appropriate
button ~ in the cockpit.
Ambience lighting
Applies to veh icles: w it h amb ience l ig h ting
You can select a color profile and brightness
for the ambie nce lighting in various areas of
the ve hicle, called zones.
Turning ambience lighting on
.. Select in the MMI: ICAR ! function button >
Car systems control button > Vehicle set·
tings > Interior light ing > On .
Adjusting /turning off the brightness
• Sele ct in the MM I: ICARI fu nction button >
Car sy stems control b utton > V ehicle set­
ting s> Inte rior light ing > Brightness .

Wiper and washer system
Switching the windshield wipers on
Fig. Sl W indshield wiper leve r
Move the windshield wiper lever to the corre­
spond ing pos ition:
@ -Windshie ld w ipers
off
(D -Rain sensor mode. The w indshie ld w ipers
switch on once the vehicle speed exceeds ap­
proximately 2 mph (4 km/h) and it is raining.
The higher the rain sensor sensitivity is set
(switch @to the right), the earlier the w ind­
shield wipers react to moisture on the wind­
shie ld. You can deact ivate rain sensor mode in
the MMI, which w ill then activate intermittent
mode. Select:
ICARI function button > Car sys­
t e m s
control button > Dri ver ass is t > Ra in
s en sor
> Off . In intermittent mode, you can
adjust the interval time using the switch @.
@ -Slow wiping
@-Fast wiping
©-Single wipe. If you hold the lever in this
position longer, the wipers switch from slow
wiping to fast wip ing .
® -Clean the windshield . The wipers wipe
one time after several seconds of driving to
remove water drop lets. You can switch this
function
off by moving the lever to position ®
within 10 seconds after the afterw ipe . The af­
terw ipe f unction is react ivated the next time
you switch the ig nition on.
Cleaning the headlights . The headlight wash­
er system* only functions when the headlights
are on. If you move the lever to position ®,
Clear vi sion 5 3
the headlights and the night vision system
camera* are washed in intervals.
A WARNING
-The rain sensor is only designed to assist
and support the driver.
It remains entire­
ly the driver's responsibility to monitor
outs ide weather cond itions and to man­
ually activate the wipers as soon as rain
or drizzle reduces visibility through the
windshie ld.
- The windsh ield must not be treated w ith
wate r-repellent mate rials. They can in­
crease glare unde r poo r vis ibility condi­
tions such a s wetness, d arkness, or w hen
the sun is low on the hori zon. In addi ­
tion, they can cause the w indshield wip­
ers to chatter.
- Properly f unctioning windshield wiper
blades are req uired for a clear v iew and
safe driving
¢ page 54, Replacing
windshield wiper blades.
(D Note
- In the case of frost, check whether the
windshield wiper blades are frozen to
the windshield. Switching on the wind­
shield wipers can damage the wiper
blades!
- Prior to us ing a car wash, the w indshield
w iper system must be sw itched off ( lever
in posit ion @). T his he lps to prevent un­
intentional switching on and damage to
the windsh ield wiper system.
- Do not use the wipers to clear a frosted
w indow. Us ing the wipers as a conve n­
ient ice scrape r will destroy the wiper
blades.
(D Tips
- The windshield wipers are sw itched off
when the ign it ion is off . Activate the
w indshield wipe rs after the ignition is
switched back o n by movi ng the w ind­
shield wiper lever to any positi on.
- Worn or d irty wi ndshield wipe r blades
result in streaking. This ca n affec t the

92 Audi ad apti 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 lating 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 98.
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. 96 Front of th e veh icle: senso rs and video camera
II> -m 0 :t
~
The areas that conta in the radar and ultrason­
ic sensors and the v ideo camera
c:::> fig. 96
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 214. 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 94, fig. 99.
- 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 veh icles 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 93 .
-Stat ionary objec ts c:::>page 93.
& 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 driver, 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.
- Improper 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 remain in fu ll control of your ve­
hicle 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,

Audi adapt ive crui se c ontrol an d bra kin g guard 9 3
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,
heavy 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
conditions .
- To prevent unintended operation, always
switch ACC off when it is not being 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 ler 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. 9 7 Exampl e: dri vin g in to a curve
When dr iving into a curve c:> fig. 97 and out of
a cu rve, the ad aptive cruise con trol m ay 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. 98 Ex ampl e: object chang ing l anes and s ta tio nar y
objec 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 vehicle @, 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 .,._

98 Audi adaptive cruise control and braking guard
-Press the brake peda l to slow your vehicle
down.
Audi braking guard
Description
Ap plies to vehicles: with Audi adaptive cruise co ntrol
Fig. 106 Instrume nt cluste r: approac h warn ing
Braking guard uses radar sensors and a video
camera. It also functions within the limits of
the system when adapt ive cruise control is
switched off .
What can braking guard do?
When detected in time, the system can assess
situations when a vehicle ahead brakes sud­
denly or if your own vehicle is traveling at a
h igh speed and approaching a vehicle up
ahead that is moving more slowly . Brak ing
guard does not react if it cannot detect the
situation.
The system advises you of various situations:
- The
distance warning 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 collis ion. The indicator
light. in the display comes on.
- The
approach warning is given when a de­
tected vehicle up ahead in your lane is mov­
i ng much more slowly than you are or if it
brakes sharply . When this wa rning is given,
it may only be possible to avoid a collision
by swerving or braking sharply. Th e indicator
li ght . and indicator in the display will
warn you about the danger~
fig. 106. You
will also hear an acoustic signa l.
ll This is not av ailable in some coun tri es.
If you do not react fast enough or do not react
at all to the situation, braking guard wi ll inter·
vene by braking and the message
braking
guard intervention
will appear.
- If a collision is imminent, the system wi ll
first provide an
acute warning by briefly and
sharply applying the brakes .
- If you do not react to the acute warning,
braking guard can brake wit h increas ing
force w ithin the limits of the system . This
reduces the vehicle speed in the event of a
collision.
- The system can initiate max imum brak ing
shortly before a collision
1> . Full deceleration
at high speeds occurs only in vehicles with
adapt ive cr uise control and side assist (p re
sense plus) .
- If the brak ing guard senses that you are not
braking hard enough when a collision is im·
minent, it can increase the brak ing force.
- The pre sense functions also engage when a
col lision is imminent ~
page 194.
Which functions can be controlled?
You can switch braking guard and the dis­
tance/approach warn ing on or off in the MMI
~ page 99, Settings in the MMI.
A WARNING
-
Lack of attention can cause collisions, oth-
er accidents and serious personal injuries .
The braking guard is an assist system and
ca nnot prevent a collision by itself. The
driver must always intervene. The driver is
a lways respons ible for braking at the cor­
rect time.
- Always pay close attention to traffic,
even when the braking guard is switched
on. Be ready to intervene and be ready to
take comp lete control whenever necessa­
ry. Always keep the safe and legal dis­
tance between your vehicle and veh icles
up ahead .
- Braking guard works within limits and
will not respond outside the system

,....,
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Audi adaptive cru ise control and brakin g guar d 99
limits, for example w hen approaching a
stopped vehicle or stationary obstacle
(end of a traffic jam or veh icle that has
br oken down in traffic).
- Always remember that the radar sensor
for the braking guard works only withi n
defined detection and range limits that
may prevent the proper detection of oth­
er 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 in cl ud ing crash barr i­
ers or t unnel entrances may impair the
f unction of the radar sensor .
@ Tips
-You can cance l the braking w ith increas­
i ng fo rce that is initiated by the system
by braking yo urself, by accelerating no­
ticeab ly or by swerving .
- Bra king guard error messages
¢page
99.
- Keep in mind that braking gua rd can
brake unexpec tedly. Always secure any
cargo or objec ts that yo u are transport­
ing to reduce the risk of damage o r in ­
j u ry .
Settings in the MMI
App lies to vehicles: with Audi adaptive cruise co ntrol
.. Se lect : ICARI funct ion button > Car sy stem s
control button > Driv er assist > Audi brak ­
ing guard .
S ystem ·
Switch braking guard On and Off .
When you switch the ignition on, the message
Audi b raking gu ard off appears if the system
is switched off.
Early wa rning -The distance and approach
warn ings in the display can be switched
On /
Off .
(D Tips
-Yo ur settings are automatically stored
and assigned to the remote contro l key
being used at the time the settings are
made.
- If you restrict the ESC, the braking guard
also switches itself off¢ page
199.
-Switch braking guard off when you are
loading the vehicle onto a veh icle carrier
,
train, ship or other type of transporta­
tion. This can prevent undesired warn­
ings from the braking guard system.
Messages
App lies to vehicles : wit h Audi adapt ive cruise contro l
Braking guard : off
This driver message appears if the system is
turned off via the infotainment. Otherwise, if
the system is turned off, the information ap­
pears every t ime shortly after the start of the
trip.
The driver message also appears if the system
is not available due to a malfunct ion or if the
ESC is not switched on¢ page
199. If this is
the case, the system w il l no t prov ide warnings
about a poss ible collision .
Braking guard : activated
This dr iver message appears if sharp brake
pressure was applied due to an acute warning.
ACC: Un availabl e!
ACC and Audi braking guard: not available
The system cannot detect moving vehicles up
ahead correctly and is switched off. The sen­
sors have been displaced or are not working
proper ly . The Audi pre sense funct ions may al­
so be affected. Drive to yo ur autho rized Audi
dealer or author ized A udi se rv ice facility im­
med iate ly to have the malfunction corrected.
ACC: currently unavailable . No sensor vision
A CC and brak ing guide: cu rrentl y una va ila ­
ble . No sensor vision