2018 AUDI A8 sensor

Lights a nd Vis ion
detected by the light sensors. So a lways
switch on the headlights
§.D under these
weather conditions and when driving in the
dark .
- Crashes can happen when you cannot see
the road ahead and when you cannot be
seen by other motorists . Always turn on the
headlights so that you can see ahead and so
that others can see your
car from the back.
- The rear fog lights should only be turned on in accordance with traffic regulat ion, as the
lights are bright for following traffic.
- Please observe legal regulations when using
the light ing systems described .
@ Tips
-The light sensor* for automatic dynam ic
headlight range control* is located in the
rear view mirror mount . You should there­
fore not apply any st ickers to the w indshield
i n this area in order to prevent malfunctions
or fail ures .
- In the event of a ligh t sensor malfunct ion,
the driver is not ified in the instrument clus­
ter
d isplay~ page 25.
- You w ill hear a wa rning tone if you open the
driver door when the exter ior lights are
switched on .
- In cool or damp weather, the inside of the
headlights, turn s ignals and tail lights can
fog over due to the temperature difference between the inside and outside . They will
clear short ly after switching them on . This
does not affect the service life of the light­
i ng .
44
Turn signal and high beam lever
The turn signal lever operates the turn signals,
the high beams and the headlight flasher .
Fig. 45 T urn signa l an d high beam leve r
Turn signa ls¢ Q
N 0 .... 0 :i:
"' m
The t urn signa ls act ivate when you move the lev­
er into a turn signa l position when the ignit ion is
switched on.
(D -Right turn signal
@ -Left turn signal
The turn signa l blinks three times if you just tap
the lever.
H igh be ams and h eadlight fla sh er ~D
Move the lever to the corresponding position:
@ -High beams on (vehicles with High beam as­
sistant* ~ page 44)
@-High beams off or headl ight flasher
T he
El indicator light in the instrument cluster
turns on.
A WARNING
High beams can cause glare for other drivers,
which increases the risk of an accident . For
this reason, only use the high beams or the
headlight flasher when they will not create
g la re for othe r drive rs .
High beam assistant
App lies to: vehicles with high beam ass istant
A camera on the rearv iew mirror mount can de-
tect light sources from other road use rs. The high
beams switch on or off automatically depending
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coming vehicles, the vehicle speed and other en­
vironmenta l and traffic conditions.
Activating high beam assistant
Requirement: the light switch must be set to the
AUTO position and the high beam assistant must
be switched on in the Infotainment system
~ page 45 .
.,. To activate the high beam assistant , tap the
l ever forward @. T he
II ind icator light ap­
pears in the instrument cluster display and the
high beam headlights are switched on/off auto­
matically. The
ii indicator light also turns on if
the high beams are switched on.
Switching the high beams on/off manually
If the high beams did not switch on/off automat­
ica lly as expected, you may switch them on or off
manually instead:
.,. To switch the high beams on manually, tap the
lever forward @. T he
ii indicator light turns
on .
.,. To switch the hig h beams off manua lly, pull the
lever
back @. The high beam assistant is deac­
t ivated.
Operating the headlight flasher
.,. T o operate the headlight flasher when the high
beam assistant is activated and high beams are
switched off, pull the lever
back @. The high
beam assistant rema ins active.
Messages in the instrument cluster display
Headlight assist: System fault
Drive to an authorized Aud i dea ler or authorized
Audi Service Fac ility immediately to have the
malfunction corrected. You can still switch the
high beams on or off manually.
Headlight assist: Unavailable No camera view
The camera view is blocked, for example by a
sticker or debris .
The sensor is located between the interior rear­
view mirror and the windshield. Do not place any
stickers in this area on the windshield.
Lights and Vision
A WARNING
--
High beam assistant is only intended to assist
the driver. The driver is still respons ible for
controlling the headlights and switching
them manually depend ing on light and visibil­
it y conditions. It may be necessary to operate
them manually in situations such as:
- I n adverse weather conditions such as fog,
heavy rain, blowing snow or spraying water.
- On roads where oncom ing traffic may be
pa rtiall y obscured, such as expressways.
- When there are road users that do not have
sufficient lighting, such as b icyclers or
vehicles with dirty tail lamps.
- I n tight curves and on steep hills.
- In poorly lit areas.
- With strong reflectors, such as signs.
- If the area of the w indshield near the sensor
is fogged over, dirty, icy or covered with a
sticker .
Adjusting the exterior lighting
The functions are adjusted in the Infotainment
system.
.,. Select: I CAR ! function button > Car systems
control button > Vehicle settings > Exterior
lighting .
Automatic headlights
You can adjust the following sett ings in the Au­
tomatic headlights
menu:
Headlights activation time -you can adjust if the
headlights switch on
Early, Medium or Late ac­
cording to the sensitivity of the light sensor.
Auto-dimming high beams* -you can switch the
high beam assistant*
On and Off .
Daytime running lights*
USA models :
the daytime running lights can be
switched on/off. Select
On or Off.
Canada models:
this function cannot be switched
off. They activate automatically each time the ig -
nition is switched on .
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Lights and Vision
Retracting the rear door sunshades*
~ To re tract the sunshade from the driver's seat,
press the left/right rear power window switch
~ in the driver's door.
~ To retract the sunshade from the rear of the
vehicle,
press the power window switch Q;;; in
the left/right rear door.
You can adjust the settings for the rear sunshade
so the shade retracts automatically when you se­
lect the reverse gear. Select:
CAR function button
> Car systems control button > Vehicle settings
> Automatic rear blind > On. The settings are au ­
tomatically stored and assigned to the remote
control key. T he sunshade is extended again as
soon as the vehicle is traveling forward at a speed
greater than 9 mph (15 km/h) if the ignition has
not been switched off in the meantime .
&_ WARNING
Always pay careful attention when closing the
sunshades. Pinching could cause serious inju­
ries.
@ Tips
- Pressing the l~•~l button several times in a
r ow can trigger the overload protection. The
sunshade can on ly be extended/retracted
again after a brief waiting period.
- The rear window sunshade only functions
when the vehicle interior is warmer than
14°F (-10°().
Vanity mirror in the rear
Appl ies to: ve hicles w ith vanity mirro rs in th e rear
Fig. 55 Rear headl iner: vanity m irror
50
~ Press the button to fold the mirror open. The
mirror lighting turns on automatically .
~ To change the mirror's angle, move it forward/
back with your hand.
Windshield wipers
Switching the windshield wipers on
Fig . 56 Windsh ield w iper lever
Move the windshield w iper lever to the corre­
sponding posit ion:
@ -Windshield wipers off
G)-Rain sensor mode. The windshield wipers
switch on once the vehicle speed exceeds approx­
imately 2 mph (4 km/h) and it is raining. The
higher the sensitivity of the rain sensor that is set
(switch @to the right), the earlier the wind­
shield wipers react to mo isture on the wind­
shield. You can deact ivate the rain sensor mode
i n the Infotainment system, which sw itches the
i ntermittent mode on. Se lect:
ICARI function but­
ton
> Car systems control button > Driver assis·
tance
> Rain sensor> Off. In intermittent mode,
you can adjust the interval time using the switch
@.
@ -Slow wiping
@ -Fast w iping
@ -Single wipe. If you hold the lever in this posi­
tion longer, the wipers switch from slow wiping
to fast wiping.
®-Clean the windshield. The wipers wipe one
time after several seconds of driving to remove
water droplets. You can sw itch this function off
by moving the lever to posit ion ® within
10 sec­
onds of the afterwipe . The afterwipe function is
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on.
C lea n the head lights. The headlight washer sys ­
tem operates only when the low beam headlights
are switched on . If you move the lever to position
@ , the headlights and the night vision assist
camera* are cleaned at intervals .
A WARNING
-The rain sensor is only intended to assist the
dr iver. The driver may still be responsible
for manually sw itching the w ipers on based
on v is ib il ity conditions.
-The w indshie ld may not be treated with wa­
ter-repell ing windsh ield coating agents . U n­
favorable conditions, such as wetness, dark­ ness, and whe n the s un is low, can cause in­
cr eased g la re, which in cre ases the risk of a n
acc iden t. W iper blade ch atter is also poss i­
ble.
-Prope rly f unct ion ing winds hield wiper
blades are require d fo r a clear view and s afe
driving¢ page 51, Replacing the wiper
blades.
(Llj) Note
-If there is frost, make s ure t he windsh ie ld
wiper b la d es are not frozen to the wind ­
s h ield. Switching on the windshield wipers
when the blades are frozen to the wind­ s h ield can damage the wiper blades.
-Prior to using a car was h, the windshield
wiper system must be switched off (lever in
pos ition @). This prevents the wipers from
switching on un intent ionally and causing
damage to the w indshie ld w iper system .
(D Tips
-The windshield wipe rs switch off when the
i gnition is sw itched off. You can act ivate the
winds hield wipers after the ig nition is
switched back on by moving the winds hield
wiper leve r to any pos it ion .
-Worn or dirty w indshield wiper blades result
i n streak ing . This can affec t the ra in se nsor
f u nct ion . Check yo ur windsh ield wipe r
b lades regu lar ly.
Light s and Vision
-The washer fluid no zz les for the windshield
washer system are heated at low tempera­
tures when the ign ition is on .
-When stopping temporari ly, such as at a
traffic light, the speed of the windshield
w ipers automatica lly reduces by one level.
Cleaning the wiper blades
Clean the wiper b lades when you see w iper
streaks. Clea n the wiper blades with a soft towel
and glass cleaner .
.. Place the windshie ld w iper arms in the service
position
¢ page 51.
.. Fold the windshie ld wiper arms away from the
w indshield .
A WARNING
Dirty windsh ie ld w iper b lades can impa ir vi­
sion, w hich in creases the r is k of an acc ident.
Replacing the wiper blades
The service position is set in the Infotainment
system .
Fig. 57 Remov ing w indsh ield wiper b lades
Windshield wiper s erv ice position /blade
repl ace ment posit ion
-
~ ~ M 0 :i: ... m
.. Switch the ignit ion off and move the windshield
w iper lever to
position @) briefly¢ page 50,
fig. 56. The windshield wipers move into the
serv ice position .
.. To bring the wiper blades back into the o rig inal
position, sw itch the ignition on and ope rate the
w indshie ld w iper lever.
You can also turn the se rvice posit ion on or off in
the Infotainment system:
.,.
51

lL t:0 ....
'"" ......
'"" .... 0 0 :c ' Audi adaptive cruise control
Description
Applies to: vehicles with Audi adaptive cruise control
Fig . 1 03 Detect ion range
The adaptive c ruise co ntro l system is a comb ina­
tion of speed and d ist ance regula tion. It assists
the dr iver by bot h regula ting the speed and
maintaining a distance to the vehicle driving
ahead , within the limits of the system . If the sys­
tem detects and object ahead, adaptiv e cruis e
control can brake and acce lerate your vehicle.
Th is makes driving more comfortable both on
long stretches of highway and in stop-and-go
traffic .
What can adaptive crui se contr ol do?
The adaptive cruise contro l system uses video, ra ­
dar and ultraso und. Objects driving ahead can be
recogni zed up to 650 feet (200 m) away.
On open roads with no traffic , it functions like a
cru ise control system . T he stored speed is ma in­
tained. When approaching an object ahead, the
adapt ive cruise con trol system automatically
brakes to match that object's speed and then
maintains the stored d istance. As soon as the
sys tem does not detect a n object ahead, adaptive
cru ise con trol acce lera tes up to the stored speed .
In stop-and -go traff ic, adaptive cru ise control can
brake unt il the vehicle is s tat io nary and then be­
g in d riving aga in under certain conditions
¢ page 98.
Aud i braking guard can warn you about an im ­
pending col lision and initiate braking maneuve rs
¢ page 100 .
Assi st a nce systems
Which functions can be controlled?
When yo u swi tc h adap tive cr uise control on, you
can set t he current speed as the "contro l speed "
¢page 97, Switching on/off .
When driving, yo u can stop cru ise cont rol
¢ page 99 or ch ange t he speed ¢ page 98 at
any t ime.
Yo u c an also se t the distance to the object mov­
i ng ahead and set the d riving mode of the adap­
tive cr uise
con trol ¢ page 99.
General information
Applies to: vehicles with Audi adaptive c ruise con trol
Fi g. 10 4 Front of t he ve hicle: se nso rs and v ideo came ra
T he areas that co nta in the radar and ult rasonic
senso rs and the video
came ra¢ fig . 104 must
no t be cove red by st ickers, depos its o r othe r ob­
jects because they can inter fere with the function
of the adaptive cru ise control system and braking
guard . For information on clea ning, see
¢ page 306. The same applies for any modifica­
tions made in the front area.
T he function of the adaptive cru ise control sys ­
tem and bra king g uard is limited under some
condit ions.
- Objects can on ly be de tected when they are
w ith in the sensor range
¢ page 95 , fig . 103 .
-The sys tem h as a limited abili ty to detect ob­
jec ts that are a shor t distance ahead, off to the
side of yo ur vehicle or mov ing into your lane.
- Ob jects that are difficult to detect such as mo­
torcycles, vehicles with high g ro und clea rance
or an overhanging load a re detected late or not
detected at all.
- W hen drivi ng through cu rves
¢ page 97 . .,.
95

Assistance systems
-With stationary objects ¢ page 97.
A WARNING
Always pay attention to traffic when adaptive
cruise control is switched on and braking
guard is active. As the driver, you are still re­
sponsible for starting and for maintaining
speed and distance to other objects. Braking
guard is used to assist you . The driver must
always take action to avoid a collision. The
driver is always responsible for braking at the
correct time.
- For safety reasons, do not use adaptive
cruise control when driving on roads with
many curves, when the road surface is in
poor condition and/or in bad weather (such
as ice, fog, gravel, heavy rain and hydroplan­
ing). Using the system under these condi­
tions increases the risk of an accident.
- Switch adaptive cruise control off tempora­
rily when driving in turning lanes, on ex­
pressway exits or in construction zones. This
prevents the vehicle from accelerating to
the stored speed when in these situations .
- The adaptive cruise control system will not
brake by itself if you put your foot on the ac­
celerator pedal. Doing so can override the
speed and distance regulation.
- When approaching stationary objects such
as stopped traffic, adaptive cruise control
will not respond and braking guard will have limited function.
- The adaptive cruise control system and
braking guard do not react to people, ani­
mals, objects crossing the road or oncoming
objects.
- The function of the radar sensors can be af­
fected by reflective objects such as guard
rails, the entrance to a tunnel, heavy rain or
ice.
A WARNING
- Improper use of adaptive cruise control can
cause collisions, other accidents and serious
personal injury.
- Never let the comfort and convenience that
adaptive cruise control and braking guard
96
offer distract you from the need to be alert
to traffic conditions and the need to remain
in full control of your vehicle at all times,
- Always remember that the adaptive cruise
control and braking guard have limits -they
will not slow the vehicle down or maintain the set distance when you drive towards an
obstacle or something on or near the road
that is not moving, such as vehicles stopped
in a traffic jam, a stalled or disabled vehicle.
If registered by the radar sensors, vehicles
or obstacles that are not moving can trigger
a collision warning and if confirmed by the
video camera, an acute collision warning.
- Never follow a vehicle so closely that you
cannot stop your vehicle safely. The adap­
tive cruise control cannot slow or brake the
vehicle safely when you follow another vehi­ cle too closely. Always remember that the
automatic braking function cannot bring the
vehicle to a sudden or emergency stop un­
der these conditions .
- To prevent unintended operation, always
switch ACC off when it is not being used .
@ Note
The sensors can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. That could affect the adaptive
cruise control system and braking guard .
Have an authorized Audi dealer or authorized
Audi Service Facility check their function.
© Tips
For an explanation on conformity with the
FCC regulations in the United States and the
Industry Canada regulations, see
¢page 339.

Ass is tance sy stem s
~-~ ---Di sta nce 1: this setting corresponds
to a distance of 92 ft (28 m) when traveling at 62
mph (100 km/h), for example (time between: 1
second) .
~-- ~--Di stan ce 2: this setting corresponds
to a distance of 118
ft (36 m) when traveling at
62 mph (100 km/h), for example (time between:
1.3 seconds) .
~--- ~-Distance 3: this setting corresponds
to a distance of
164 ft (SO m) when traveling at
62 mph (100 km/h), for example (time between:
1.8 seconds) .
~--- -~ Distance 4 : This setting corresponds
to a distance of 210
ft (64 m) when traveling at
62 mph (100 km/h), (time d istance of 2.3 sec­
onds).
A WARNING
Following other vehicles too closely increases
the risk of collisions and ser ious personal in­
jury .
- Setting short distances to the traffic ahead
reduces the time and distance available to
br ing your vehicle to a safe stop and makes
it eve n mo re necessary to pay close atten­
t ion to traffic.
- Always obey applicable traffic laws, use
good judgment, and select a safe following
distance fo r the traffic, road and weather
cond itio ns.
(D Tips
-Distance 3 is set automatically each time
you switch the ignit ion on.
-Your settings are automatically stored and
assigned to the remote control key being
used.
Selecting the driving mode
Applies to: vehicles with Audi adaptive cruise control
.. Se lect the des ired driving mode in dr ive se lect
¢ page 111 .
100
@ Tips
Your settings are automatically stored and as­
signed to the remote contro l key being used.
Driver intervention request
Applies to: vehicles with Audi adaptive cruise control
Fig . 112 Instrument cluster : request for driver interven·
t ion
In certain situations, the system will request you
to take action:
- If the braking from the adaptive cru ise control
system is not enough to ma inta in enough dis­
tance to the object ahead.
The danger is indicated by
the . indicator light
¢fig. 112. An audio signal will also sound.
- Press the brake peda l to slow yo ur vehicle
down .
Audi braking guard
Applies to: vehicles with Aud i adaptive cruise control
F ig . 113 In strume nt cl us ter: approach warning
The brak ing guard uses radar sensors and a video
camera .
It also functions within the limits of the
system when adaptive cru ise cont rol is switched
off.
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When detected in time, the system can assess
dangerous sit uat ions where an object a head
brakes suddenly or if your own vehicle is traveling
at a high speed and approaching an object that is
mov ing more slowly. The brak ing guard does not
react if it cannot detect the situation.
The system advises you of various dangero us sit­
uations :
- T he
distan ce warning occurs if you d rive too
closely to the object ahead for a long period o f
time . If the object ahead brakes strongly, you
would not be able to avoid a collision .
The.
indicator light appears as an indication for th is.
- The
app roach wa rning occurs when an object
ahead is traveling more s low ly or brakes
strongly. When th is warning occurs, it may on ly
be poss ible to avoid a co llision by swerving or
braking strongly . The danger is indicated by the
• ind icator light ¢ fig . 113 . An aud io signal
will a lso sound .
If you do not react early enough or at a ll to a dan­
ge rous situation, the braking guard suppo rts you
w ith a brak ing intervent ion . T he approach warn­
i ng indicators and the message
Braking guard :
e ngaged
also appea r.
- If a co llision is imminent, the system will first
provide a n
acute warning by braking sharply .
- If you do not react to the acute warning, the
brak ing guard can increase the braking force
withi n the l imits of the system . This reduces
the vehicle speed in the event of a co llision.
- T he system can init iate complete decelerat io n
sho rtly befo re a collis ion
l) . Full dece le ration at
high speeds occu rs on ly in vehicles with adap­
t ive cr uise con trol and s ide ass ist (pre sense
p lu s) .
-If the bra king g uard determines tha t you are
not brak ing st rongly eno ugh when there is an
impending co llision, i t can increase the brak ing
force.
- T he pre se nse f unctions also engage when
there is an impending collision
¢ page 217 .
ll Mark et-sp ecific
A ss istance systems
Which functions can be controlled?
Yo u can swi tch t he b raking guard and t he d is ­
tance/approach warning on or
off in the Infotain ­
ment system
¢ page 102, Settings in the Info­
tainment system .
A WARNING
--
Lack of attention can cause collisions, other
accidents and ser ious personal in juries . The
braking guard is a n assist system and cannot
pr event a collision by itself . T he dr iver m ust
a lways inte rvene . The d river is always respon­
sib le for b raking at the co rrect t ime .
- Always pay close atten tion to traffic, even
when the b raking gua rd is switched on. Be
ready to in tervene and be rea dy to take
comp lete co ntro l wheneve r ne cess ary. A l­
ways keep the sa fe and legal distance be ­
tween your vehicle a nd ve hicl es up ahead .
- B raki ng g uard works w it hi n limi ts a nd will
not respond o uts ide the system limits, fo r
examp le when approac hing a stopped veh i­
cle or stationary obstacle (end of a traff ic
jam or vehicle that has broken down in traf ­
fic).
- Always remember that the radar sensor for
the brak ing guard works only within def ined
detection and range limits that may prevent
the proper detect ion of other vehicles.
- The radar sensor's function and range can
be reduced by rain, snow and heavy spray.
Mov ing vehicles up ahead may not be
p romptly de tected or may no t be detected
at a ll.
- Reflective surfaces includi ng crash ba rriers
or tunne l entra nces may impair the function
of t he rad ar senso r.
(D Tips
- You can cancel the braking with increas ing
force tha t is initiated by t he sys tem by brak­
ing yourse lf, by acce le ra ting not iceably or
by swe rving.
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