2014 AUDI A8 sensor

48 Clear vision
Adjusting the exterior lighting
The settings are adjusted in the MMI.
• Se lect : I CAR ! function button > Car systems
control button > Vehicle settings > Exterior
lighting .
Automatic headlights
You can adjust the following settings in the
Automatic headlights menu:
Headlights activation 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 ca n sw itch adaptive
l ight
On and Off.
Automatic high beams*
You can switch the high beam ass ist on and
off .
Daytime running lights
USA models :
You can switch the dayt ime run­
ning lights
on and off .
Canada models:
The function cannot be
turned off .
It is activated a utomat ica lly each
time the ign ition 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 yo u 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
only 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. 39 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. 39.
N 0 ... 'i' :r
~
• Move the lever briefly unti l 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
II or Bin
the instrument cluster¢ page 11 also blink.
- After you have turned a corner, the turn sig-
na l switches off automatically.
- The
high beam works only when the head-
lights are on . The indicator light
II in the ..,.

instrument cluste r ill uminates when the
high beams are on.
- T he
headlight flasher works only as long as
you hold the lever -even if there are no
li ghts turned o n. The indicator light
El in
the instr ument cluster illuminates when you
use the head light flasher.
A WARNING
Do not use the hig h beam or headlight
flasher if you know that these could blind
oncoming traffic.
High beam assist
Applies to vehicles: with high beam ass ist
The high beam assist automatically switches
the high beams on or off, depending on the
surroundings and traffic conditions .
Fig. 40 Turn sig na l and high beam lever: Turning on
and off the high beam ass ist
Activating h igh beam a ssi st
8 .... 0 :i: ;g
Requirement: The light sw itch must be in the
AUTO position, the low beam head lights must
be on and the high beam assist must be
switched on in the Infotainment¢
page 48.
~ Press the lever into position @ in order to
activate the high beam assist. T he indicator
light
Ill turns on in the instrument cluster
display and the high beams switch o n or off
automatically . The indicato r light
II turns
on if the high beams w ere switched on .
Switching the high beams on /off
manually
Requirement: Hig h beam ass ist is activated.
Clear vis ion 49
If the high beams d id not swi tch on/off auto ­
matically when expected, you may instead
switch them on/off manua lly:
~ To swi tch the high beams on manually, press
the lever into position@. The indicator light
II turns on. To switch the hig h beams off
aga in, p ull the leve r into position @.
~ To switch the high beams off manually after
they have turned on a utomat ica lly, pull the
lever i nto pos ition @.
Oper ating the headlight fla sher
~ To operate the flashe rs while the high beam
assist is act ive, pu ll the lever into position
@ . T he high beam assist will remain act ive.
Messag es in the instrument cluster
di spl ay
Headlight assist: System fault
Drive to your authorized A udi dealer immed i­
ate ly to have the ma lfunction corrected. Yo u
can still switch the high beams on or off man­
u ally.
Headlight a ssi 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 be tween the inter io r
r earvi ew mirror and the w indshield . There­
fo re, do no t place any st ic kers in this a rea on
th e windsh ie ld .
Service setting
There is a d ifferent sens it ivity sett ing for serv­
ic ing . Th is sett ing can be activated by pr essing
and hold ing the b utton on the int erio r r ear­
view m irror for mo re tha n 1 8 seconds. The
L E D next to the button blinks th ree times.
If
yo u have accidentally se lec ted this service
funct io n, the origi nal sensitivity will be a uto­
matically restored the next t ime yo u sw itch
the ignit ion on.

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. 41 Headliner: Front interior lights
F ig. 42 Rear headli ner : Read ing light
Press the app ropriate button ~ fig . 41:
~ -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. 48 W indshield w iper 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

94 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¢
page 100.
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. 93 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 ¢
fig. 93
must never be covered 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¢
page 216. 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¢
page 96, fig. 96.
- 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
¢page 95 .
-Stat ionary objec ts ¢page 95.
& 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
for 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,

Audi adapt ive crui se c ontrol an d bra kin g guard 95
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 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. 9 4 Exampl e: dri vin g in to a curve
When dr iving into a curve c:> fig. 94 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. 95 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 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 .,._

100 Audi adaptive cruise control and braking guard
Audi braking guard
Descript ion
Applies to vehicles: with Audi adaptive cruise control
Fig . 10 3 Instrumen t cl uste r: approach warn ing
Braking guard uses radar sensors and a video
camera . It also functions within the lim its 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 veh icle is traveling at a
h igh speed and approachi ng a veh icle up
ahead that is moving more slowly . Bra king
g ua rd does not react if it can not detect th e
situa tio n.
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 coll is io n. The indicator
li ght
I in the display comes on .
- The
approach warning is g iven when a de ­
tected veh icle up ahead in your lane is
mov ­
ing much more slowly than you are o r if it
brakes sha rply . W he n this wa rning is giv en,
it may only be poss ible to avoid a collisio n
b y swervin g or br aki ng sh arply . Th e ind ic ator
li gh t
I and indica to r i n the disp lay wi ll warn
yo u about t he danger ~
fig. 103. Yo u will a l­
so hear an acoustic signa l.
If yo u do not re act fa st enoug h or do not re act
at all to the si tuatio n, br aking gu ard will inte r-
ll Thi s is not ava ilable in some co un tri es .
vene by braking and the message braking
guard intervention
wi ll appea r.
- If a coll is ion is imm inent, the sy stem wi ll
fi rs t provide an
acute warning by br iefly and
sharply a pplying the brakes.
- If you do no t re act to the acu te w arning,
bra king g uard can brake w it h increas ing
force w it h in the lim its of the system . This
red uces the vehicle speed in the event of a
co llision.
- The system can initiate maximum b ra ki ng
short ly before a co llision
ll. Full dece leration
at high speeds occurs only in vehicles with
ada ptive cr uise control a nd side assist (pre
sense plus) .
- If the brak ing guard senses that yo u are not
brak ing hard en ough w hen a co llis ion is im­
m inent, it can increase t he b rak ing fo rce .
- The pre sense f unctions also engage whe n a
col lision is imm inent
c> page 197.
Which function s can be controlled?
You can switch braking guard and the dis­
tance/approach warning on or off in the M MI
c> page 101, Settings in the MMI.
A WARNING
-
Lack of attentio n can cause collisions, oth-
er accidents and serio us pe rsonal i nju ries.
Th e braking gua rd is an assist system and
c an not preve nt a collision by it self. T he
d rive r m ust always in tervene. The dr ive r is
a lway s respon sib le f or br aki ng at the cor­
r e ct t ime.
- Always p ay clos e atte ntio n to traffic,
even when the braking guar d is swi tched
on. Be ready to in te rvene and be re ady to
take c omp lete contro l whenever necessa­
ry. Always keep the safe and legal dis­
tance between your ve hicle and veh icles
up ahead.
- Bra king guard works within limits and
w ill not respond outside the system lim­
its, for examp le w hen approachi ng a
stopped vehicle or stationary obstacle ..,.

Audi adaptive cru ise control and brakin g guar d 101
(end of a traffic jam or veh icle t hat has
br oken down in traffic).
- Always remember that the radar sensor
for the b raking guard works only within
defined detection and ra nge limits that
may prev ent the proper det ection of oth­
er ve hicles.
- The ra dar 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 includ ing crash barr i­
ers or tunnel ent rances may impair the
function of the radar sensor.
(0 Tips
- You can cance l the braking w ith increas­
i ng fo rce that is initiated by the system
by braking you rself, by accelerating no­
ticeab ly or by swerving.
- Brak ing guard error messages
<=> page 101.
-Keep in mind that braking guard can
brake unexpectedly. Always secure any
ca rgo or objec ts that you are transport ­
i ng to reduce t he risk of d amage o r in­
Ju ry.
Settings in the MMI
Applies to vehicles: with Audi adaptive cruise control
~ Se lect : ICARI function button> Car system s
control button > Driver assist > Audi brak­
ing guard .
S ystem -
Switch braking g ua rd On and Off .
When you sw itch the ignition on, the message
Audi braking guard off appears if the system
is switched off.
Early warning -The distance and approac h
warn ings in the display can be switched
On /
Off .
@ Tips
- Your settings are automatica lly stored
and assigned to the remote control key being used at the time the settings
are
made .
-If you res trict the E SC, the braking gua rd
also sw itches itself
off <=> page 201 .
-Swi tch braking guard off when you a re
loading the vehicle onto a veh icle carrier,
t rain, ship o r other type of transporta­
t ion . This can prevent undesired warn­
ings from the braking guard system.
Messages
Applies to vehicles: with Aud i adapt ive c ruise con tro l
Braking guard : off
T his dr iver message appears if the system is
turned off via the info tainment . Othe rwise, if
the system is turned off, the information ap ­
pears every time shortly after the start of the
trip.
T he driver message a lso appears if the system
is not ava ilable d ue to a malfunct ion or if the
ESC is not switched on<=>
page 201 . If this is
the case, the system w ill not prov ide warnings
about a poss ible collision.
Braking guard : activated
T h is dr iver message appears if sharp b rake
pressure was applie d due to an acu te warning.
ACC: Unavailable!
ACC and Audi braking guard: not available
The system cannot detect mov ing vehicles up
ahead correctly and is switched off . The sen­
sors have been displaced or are not working proper ly. The Audi pre sense functions may a l­
so be affected . Drive to your authorized Aud i
dealer or author ized Audi serv ice facility im­
med iate ly to have the malfunction cor rected .
ACC: currently unavailable. No sensor v is ion
ACC and b raking guide: cu rrentl y unavaila­
ble . No sensor vis ion
T h is mess age appears if the senso r view is ob­
structe d, for examp le by leaves, snow, heavy
spray or dirt. Clean the sensors
,=;,page 94,
rg .93 . ~