sensor AUDI A3 2015 User Guide

-Do not use the wipers to clear a window
that is covered with frost. Using the wip­
ers as a convenient ice scraper will
destroy the wiper blades.
@ Tips
- The windshield wipers switch off when
the ignit ion is turned off. You can acti­
vate the windshield wipers after the igni­
tion is switched back on by moving the
windshield wiper lever to any pos ition.
- Worn or dirty windshield wiper blades
result in streaking. This can affect the
rain sensor funct ion. Check your wind­
sh ield wiper blades regularly.
- The washer fluid nozzles in the w ind­
sh ield washer system are heated" at low
temperatures when the ignit ion is on.
- When stopping temporarily, such as at a
traff ic light, the speed of the windsh ield
wipers automatically reduces by one lev­
el.
- The rain sensor can be switched on or off
i n the MMI in the
Dr iv er a ssistan ce
menu
Cleaning windshield wiper blades
Clean the wiper blades when you see wiper
streaks. Use a soft cloth and a glass cleaner.
... Place the w indshield wiper arms i n the serv­
ice position
¢ page 47.
... Fold the w indshield wiper arms away from
the windshie ld .
8_ WARNING
Dirty windshield wiper blades can impa ir
vision, which increases the risk of an acci­
dent.
(D Note
If you see streaks again after cleaning the
w iper blades, the b lades must be replaced
¢page 47.
Light s and Visi on 47
Replacing front windshield wiper blades
Fig. 37 Remov ing windshield wiper blades
Wipe r servic e posit io n/ blade re pla cement
po sition
... To bring the wipers into the service position,
turn the ignition off and move the wind­
shield w iper lever into pos ition @
¢ page 46, fig. 36.
... To bring the w ipers into the s tarting posi­
tion, turn the ign ition on and move the
windshie ld wiper lever into position @
¢ page 46, fig. 36 .
Removing the wiper blade
... Fold the windshield wiper arm away from
the windshield .
... Press the locking knob
(D ¢ fig . 3 7 on the
wiper blade . Hold the wiper blade firmly .
... Remove the wiper blade in the direction of
the arrow .
Installing the wiper blade
... Insert the new w iper blade into the mount
on the wiper arm @unti l you hear i t latch
into place .
... Place the wiper arm back on the winds hield.
... Turn the service position off.
8_ WARNING
For safety reasons, the windshield w iper
blades should be replaced once or tw ice
each year.
(D Note
- The windshield wiper blades must on ly
be folded away when in the service posi­
tion. Otherwise, you r isk damaging the
-
•

IAUTO I Switching automatic mode on and
off
The automatic mode is turned on using the
IAUTOI button. AUTO mode switches off once
a button in the climate control system is pressed. Automatic mode maintains a con­
stant temperature inside the vehicle . Air tem­
perature, a irflow and air distribution are con­
trolled automat ica lly. When automatic mode
is act ive, p ress ing the
IAUTOI button briefly
activates "eco" mode*
1>. In "eco" mode*, all
settings are lowered slightly to save fue l.
When in "eco" mode*, eco is shown in the dis­
p lay. To exit "eco" mode*, press the
!AUTO I
button again.
I• I • I Setting the temperature
The temperature can be adjusted individually
for the driver and front passenger using the
dials . Temperatures between 60 ° F (+16 °C)
and 84 °F (+28 °C) can be set. Outside of this
range,
Lo or Hi will appear in the climate con­
trol system display. In both settings, the cli­ mate control runs with constantly at the max­
imum cooling or heati ng level. The tempera­
ture is not regu lated .
Synchronization: By pressing the !AU TO I but­
ton for two seconds, the temperature setting
for the driver is transferred to the front pas­
senger's side. This applies a temperature
change to the front passenge r's side.
~ Adjusting the blower
To prevent the windows from fogging over,
the blower should always run at a low speed.
You can adjust the volume of air generated by
the blower to your preference. To have the
blower regulated automatically, press the
IAUTOI button.
Adjusting the air distribution
The air distribution is adjusted with the 121, ~
and IE:! buttons. To have the air distribut ion
regulated automatically, press the
!AU TO I but­
ton .
l) This fu nct io n is not availab le in all coun tries.
Warm and cold 67
T he round air vents in the cockpit are adjusta­
ble ¢ page 68.
T o keep the windows from fogging in damp
weathe r, we recommend open ing the side air
vents and tilting them to the side
¢ page 68, Adjusting the air vents .
Foot vents are located under the front seats
and adjustable vents on the end of the center
console to heat the rear of the vehicle.
I "" MAX ! Switching the defroster on and off
The windshield and side windows are defrost­
ed or cleared of condensation as quickly as
possible. The maximum amount of air flows
main ly from the vents below the windshield.
Recircu lation mode switches off. The tempera­
ture is controlled automatically . In the ~ set­
ting, the
! A/C l cooling mode switches on auto­
matically, depending on the outside air tem­
perature.
The
! AUTO I button switches the defroster off.
l"""I Switching recirculation mode on and
off
The recircu lation mode can be turned on man­
ually or automatically* .
- Switching manual rec irculat ion mode on and
off: Press the
1 - 1 button. The LED light up
when switched on .
- Automatic* recircu lation mode: The recircu­
lation mode must be activated in the MMI.
Select:
! MENUI button> Systems contro l
button or
Car systems > AC > Auto recircu­
lation .
The air quality sensor that is de ­
signed for diesel and gasoline exhaust auto­
matically switches the recirculation mode
on or off depending on the level of pollu­
tants in the outside air.
In recirculation mode, the air inside the vehi-
cle is circulated and filtered. This prevents the unfiltered air outside the veh icle from enter-
i ng the veh icle interior . We recommend
switching recirculation mode on when driving
IJ,-•

76 Driving
removed from the vehicle when the engine
was running.
If the convenience key is no lon­
ger in the veh icle, you cannot switch the igni­
tion on or start the engine once you stop it.
You also cannot lock the vehicle from the out­
side .
Press brake pedal
This message appears if you do not press t he
brake peda l to start the engine in a vehicle
with an automatic transmission .
Please engage N or P
This message appears whe n starting or stop­
p ing the engine if t he selecto r lever is not in
the Nor P pos ition. The eng ine will not star t/
stop.
Shift to P, otherwis e vehicle can roll away.
Door s do not lock if lev er i s not in P
This message appears for safety reasons
along w ith a warning tone . It appears if the
selecto r lever for the automat ic transm iss io n
is not in the P position when switch ing the ig­
ni tion off with the
!S TAR T ENGINE STOPI*
button . Sh ift the sele ctor leve r to t he P posi­
tion. Otherwise, the vehicle could ro ll. You al­
so cannot lock the vehicle using the locking
sensor on the door handle o r using the con­
venience key .
Electromechanical
parking brake
Operation
The electromechanical parking brake replaces
the hand brake .
Fig. 68 Center conso le: Park ing brake
.,. Pull the switch @¢ fig. 68 to set the pa rk­
ing brake. The. (USA models) . (Cana­
da mode ls) indicator light in the button and
in the instrument cluster display turns on .
.,. To release the parking brake, press the brake
pedal or the acce lerator pedal and press the
button @. The . (USA models) /. (Cana­
da mode ls) indicato r light in th e button and
ins trument clus ter tur ns off.
Your vehicle is equipped with an electrome ­
chanical pa rking brak e. The parking bra ke is
designed to p revent the veh icle from rolling
u ninte ntionally and repla ce s the hand b rake.
In add ition to the normal functions of a tradi ­
tio na l ha nd b rake, the electromechanical
parki ng b rake provides va rious conven ien ce
and safe ty f unct ions .
When starting
-The integral hill start assist helps you when
d riving by au tomatical ly re leasi ng the park­
ing bra ke ¢
page 77, Starting from a
stop.
- W hen start ing on i nclines, t he h ill sta rt as­
si st preven ts the v ehicl e from unintentiona l­
ly ro lling back . T he b raking force of the
p ar king br ake is no t released unt il su ffi cien t
driving force has been bui lt up at the
wheels .
Emergency brake function
An emergency b rak ing functions ensu res that
t h e vehi cle can be s lowed down even if the
n ormal brakes f ail¢ page 78, Emergen cy
braking fun ction.
Indicator lights
- I f the pa rk ing brake is set when the ignition
is
switched on , the. (USA models) /.
(Canad a models) indica to r li ght turns on in
t he display and b utton .
- If the pa rk ing brake is se t when the ignition
is
switched off , the. (USA models) /.
(Canada mo dels) indica tor ligh t turns on in
the display and button for about 20 sec­
onds.

82 Audi adaptive cruise control
Audi adaptive cruise
control
Introduction
Ap plies to vehicles: with Audi adaptive cruise co ntrol
The adaptive cruise control system is a combi­
nation of speed and distance regulation. It as­
sists the driver by both regulating the speed
and maintaining a distance to the object
ahead, within the abilit ies of the system. If
the system detects an object, adaptive cruise
con trol can brake and accelerate your vehicle.
This together with the automatic transmis ­
sion* makes driving more comfortable both
on long stretches of highway and in stop-and­
go traffic.
General Information
General information
A ppl ies to vehicles: with Audi adaptive cruise co ntrol a nd
Audi pre se nse fro nt
Fig. 70 Vehicle fro nt: sensor
The general information applies to adaptive
cruise control* and pre sense front*
c:>page90.
The radar sensor area c:>fig. 70 must not be
covered with stickers, deposits or any other
obstructions as it may impair the function of
the adaptive cru ise control and the pre sense
front. For information on cleaning, see
c:> page 201 . The same applies for any modifi­
cations made in the front area .
The function of the adaptive cruise control
system and pre sense front is limited in some
conditions: -
Objects can only be detected when they are
within the sensor range
c:> page 84,
fig. 73.
-The system has a limited ability to detect
objects that are a short distance ahead, off
to the side of your vehicle or moving into
your lane.
- Objects that are difficult to detect such as
motorcycles, vehicles with high ground
clearance or an overhanging load are detect­
ed late or not detected at all.
- When driving through curves
c:> page 83.
-With stationary objects r=;, page 83 .
A WARNING
-
Always pay attent ion to traffic when adap­
tive cruise control is switc hed on and the
pre sense front is active
c:> page 90. As
the driver, you are still responsible for
start ing and for maint.;1 ining speed and
distance to other objects. The pre sense
front 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.
- I mp roper use of adaptive cruise con trol
can cause collisions, other accidents and
serio us personal injury.
- Incorrect use of the adaptive cruise con­
trol can cause collisions, other acc idents
and serio us personal injury.
- Incorrect use of the adaptive cruise con­
trol can cause collisions, other accidents
and serio us personal injury.
- For safety reasons, do not use adaptive
cru ise control when driv ing on roads with
many curves, when the road surface is in
poor condition and/or in bad weather
(such as ice, fog, gravel, heavy ra in and
hydroplaning). Us ing the system under
these conditions could result in a colli­
sion .
- Sw itch adaptive cruise contro l off tempo­
ra rily when driving in turning lanes, on
expressway ex its or in construction
zones. This preven ts the vehicle from ac­
celerating to the set speed when in these
situations .

-The adaptive cr uise control system will
not brake by itself if you put your foot on
the accelerator pedal. Doing so can over­
ride the speed and d istance regulation .
- When approaching stationary objects
such as stopped traffic, adaptive cruise
control will not respond and pre sense
front will have lim ited function.
- The adaptive cru ise control system and
pre sense front do not react to people,
animals, objects cross ing the road or on­
coming objects.
- The function of the rada r senso rs 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 s top your vehi cle safe ly. The
adap tive cruise cont ro l c anno t slow or
brake the ve hicle safe ly when you follow
another vehicle too closely. Always re­
member that the automatic braking
function 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 being used.
(D Note
The sensor can be disp laced by impacts or
damage to the bumper, whee l housing and
underbody. The adaptive cruise control
and pre sense front may become impaired
as a resu lt . Have your authorized Aud i
dea le r or q ual ified repa ir facility check
their function.
Audi ad apti ve crui se control 83
In curves
App lies to vehicles: wit h Aud i adapt ive c ruise contro l and
A udi pre sense front
Fig . 71 Example : dr iving into a cu rve
When dr iving into a curve r=.> fig. 71 and out of
a curve, the adaptive cruise control may react
to an object in the neighboring lane and apply
the brakes. You can prevent that by pressing
the accelerator pedal briefly.
Stationary objects
App lies to vehicles: wit h Aud i adapt ive cr uise contro l and
Aud i pre sense front
Fi g. 72 Example: object ch ang ing lanes a nd stat ionary
ob ject
Adaptiv e crui se cont rol
The adaptive cruise control system only reacts
to objects that are moving or that the system
has already detected as moving. For example,
it can react when a vehicle that has already
been detected @turns or changes lanes, but
adaptive c ruise contro l does not react to a sta ­
t iona ry veh icle @. Press the brake pedal to
s low your vehicle down.
Pre sense front
Pre sense front only reacts to stationary ob­
jects at low speeds .

88 Audi adaptive cruise control
you can have the adaptive cruise control
me nu extende d I enabled from an autho r­
ized re pair faci lity.
Setting the driving program
Applies to vehicles: with Audi adaptive cruise control
A adaptive cru ise control driving program is
adjustab le on vehicles without Aud i drive se­
lect* .
.. Se lect in the MMI:
!MENUI button> Systems
or Car systems > Driver assistance > Adap·
tive cru ise control
> Driving program >
comfort /standard /dynamic .
Selecting the driving mode
App lies to vehicles: with Audi adaptive cruise control
The adaptive c ruise co ntro l dr iv ing prog ram is
ad justa ble for ve hicles w ith Au di drive se lect
usi ng the dr iv ing mode.
.. Se lect t he des ired driv ing mod e
comfort ,
auto , dynamic
or individual* with the knob
¢ page 10 2.
Request for driver intervention
App lies to vehicles: with Audi adaptive cruise control
Fig . 7 9 In st rum ent clus ter : d river interve ntio n re qu est
In some s ituations, the braki ng from the
adapt ive cr uise control system is not enoug h
to maintain enoug h distance to the object
a head . In these situations, the system will re­
q ues t yo u to take action .
The . indicator light and the graphic in the
d isplay w ill wa rn you about the danger
¢
fig. 79. You will a lso hear a n aud io signa l.
P ress the br ake pedal to s low y our veh icle
do wn .
Driver messages
Applies to vehicles: wit h Aud i adapt ive c ru ise control
IIJ ACC : unavailable
The system cannot gu arantee that it will de­
tect o bject s cor rectly and i s switched off. The
sens or was m ove d or is fa ulty. Drive to your
autho rize d Audi dea le r or a uth ori zed Audi
service facility immediately to have the ma l­
f unct ion corrected .
Ill ACC: currently unavailable . No sensor vi·
sion
fl ACC and Audi pre sense : currently un ­
available. No sen sor vision
T h is message appears if the senso r view is ob·
structe d, for examp le by l eaves, snow, heavy
s pr ay or d irt . C lean t he sensor ¢
page 82,
fig. 70 .
ill ACC: currently unavailable. Gradient too
steep
The road exceeds t he max imum possible an­
gle fo r safe adaptive cruise control operation.
T he adapt ive cr uise control cannot be switch­
ed o n.
ill ACC: only available in D, Sor M
Se lect the D/S or M selector leve r position .
ill ACC: parking brake applied
The adapt ive cr uise control system switch es
off automa tically if th e parki ng br ake is set.
T he adapt ive cru ise con tro l is ava ilable again
aft er re leas ing t he pa rking br ake.
ill ACC: currently unavailable. Stabilization
control input
This message appears if the Electronic Stabili ­
zation Control (ESC) is taking action to stab i·
l ize the veh icle. I n this case, adapt ive cr uise
control switches off automat ica lly .
ill ACC off: manual control!
This message a ppears if t he vehicle ro lls back
whe n start ing on a s light incline, even though
ACC is active. Press the b rake pedal to prevent
the vehicle from rolling or starting to move. .,.

90 Audi pre sense
Audi pre sense
Introduction
Applies to vehicles: with Audi pre sense basic or Audi pre
sense front
Within the limits of the system, pre sense ba­
sic and pre sense front can initiate steps to
protect vehicle occupants in certain danger ­
ous situations.
Critical driving situations can be recognized by
the pre sense front via a network of different
vehicle systems and can take steps to prepare
the vehicle occupants for a potential collision.
The pre sense front works with a radar sensor
and a video camera*.
It also functions within
the limits of the system when adaptive cruise
control* is switched
off.
General information
General information
App lies to vehicles: with Audi pre sense front or Audi
adaptive cruise control
A WARNING
Also follow the general information found
on
~ page 82, General information.
Audi pre sense basic
Descript ion
Applies to vehicles: with Audi pre sense basic
The function of the pre sense basic is activat­
ed at a speed of 10 mph (30 km/h) or higher.
The following functions can be triggered un­
der certain conditions within the limits of the
system:
- Tensioning of the safety belts (for example,
during heavy braking) : The front safety belts
have reversible belt pretensioners. If a colli­
sion does not occur, the safety belts loosen
slightly and are ready to trigger again .
- Closing the windows and the sunroof* (for
example, when over- or understeering): The
windows and the sunroof" close until there is only a small gap open. Audi drive select:
The deployment time is
adapted in dynamic mode.
A WARNING
-The pre sense basic cannot overcome natu- ral physical laws.
It is a system designed to
assist and it cannot prevent a collision. Do not let the increased safety provided
tempt you into taking risks. This could in­
crease your risk of a collision.
- The system can deploy incorrectly due to system-specific limits .
(D Tips
-Certain pre sense basic functions switch
off when ESC is switched off (sport
mode) or when driving in reverse .
- The pre sense basic functions may not be
available if there is a malfunction in the
ESC system or the airbag control mod­
ule .
- Note that with pre sense basic, the rever­
sible safety belt pretensioner on the
front passenger's side deactivates when
the front passenger's a irbag is deactivat­
ed.
Audi pre sense front
Description
Applies to vehicles: with Audi pre sense front or Audi
adapt ive cru ise control
Pre sense front informs you if the distance to
the vehicle ahead falls below the safe distance
for an extended period of time. It can warn of a possible collision and initiate braking ma­
neuvers, within the limits of the system .
When detected in time, the system can assess
dangerous situations where an object ahead
brakes suddenly or if your own vehicle is trav­
eling at a high speed and approaching an ob ­
ject that is moving more slow ly . If detection is
not possible, then pre sense front does not re ­
act.

Warnings
Applies to vehicles: with Audi pre sense fro nt or Audi
adaptive cruise control
Fig . 80 Instrument cluster: approach warning
The system recognizes various dangerous sit­
uations:
- Vehicles with adaptive cruise control: The
distance warning occurs if you drive too
closely to the object ahead for a long period
of time.
If the object ahead brakes strongly,
you would not be able to avoid a collision.
The ind icator light . indicates this.
- The
approach warning occurs when an ob­
ject ahead is traveling more slowly or brakes
strongly. When this warning occurs, it may only be possible to avoid a collision by
swerving or braking strongly. The message
Audi pre sense. Distance c::> fig . 80 and a
warning tone will warn you about the dan­ ger. For vehicles with adaptive cruise con­
trol, the. indicator light also turns on.
If you do not react enough or not at all to a
dangerous s ituation that was detected by the
system, pre sense front provides assistance by
applying the brakes .
- If a collision is imminent, the system will
first provide an
acute warning by braking
sharply. You will also be made aware of the
danger by the instrument cluster display
c::> fig. 80. For vehicles with adaptive cruise
control, the. indicator light also turns on .
-If you do not react to the acute warning, pre
sense front can brake with increasing force
within the limits of the system
l)_ This re­
duces the vehicle speed in the event of a col-
l l This is not available in some countries .
Audi pre sense 91
lision. The message Audi pre sense -Input
also appears.
- At low driving speeds, pre sense front can
begin complete deceleration shortly before
a collision
l) .
-If pre sense front determines that you are
not braking strongly enough when a colli­
sion is imminent, it can increase the braking
force.
A WARNING
--- Pre sense front cannot overcome natural
physical laws.
It is a system designed to
assist and it cannot prevent a collision .
The driver must always intervene. The driver is always responsible for braking
at the correct t ime. Do not let the in­
creased safety provided tempt you into
taking risks. This could increase your risk
of a collision.
- The system can deploy incorrectly due to
system-specific limits .
- Please note that the sensor does not al­
ways detect all objects . This increases
the risk of a collision.
- Pre sense front does not react to people
or animals or objects that are crossing
the vehicle's path or are difficult to de­
tect
c::> page 82, General Information.
- Reflective objects such as guard rails or
the entrance to a tunnel, heavy rain and
ice can affect the function of the radar
sensor and the system's ability to detect
a collision risk .
- Lack of attention can cause collisions,
other accidents and serious personal in­
juries. The pre sense front is an assist
system and cannot prevent a collis ion by
itself. The driver must always intervene.
The driver is always responsib le for brak­
ing at the correct time.
- Always pay close attention to traffic,
even when the pre sense front is switch-
ed on. Be ready to intervene and be ready .,_

92 Audi pre sense
to take complete control whenever nec­essary. Always keep the safe and legal
distance between your vehicle and
vehicles up ahead .
- Pre sense front works within limits and
will not respond outside the system lim­
its, for example when approaching a
stopped vehicle or stationary obstacle
(end of a traffic jam or vehicle that has
broken down in traffic).
- Always remember that the radar sensor
for the pre sense front works only within
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 all.
- Reflective surfaces including crash barri­
ers or tunnel entrances may impair the
function of the radar sensor.
(]) Note
The sensor can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. The pre sense front sensor can
be damaged by this. Have your authorized
Audi dealer or qualified repair facility
check their function.
@ Tips
- You can cancel the braking with increas­ ing force that is initiated by the system
by braking yourself, by accelerating no­
ticeably or by swerving.
- Driver messages about pre sense
¢page 92.
- Keep in mind that pre sense can brake
unexpectedly. Always secure any cargo or
objects that you are transporting to re­
duce the risk of damage or injury.
- Certain pre sense front functions switch off when ESC is switched off (sport
mode) or when driving in reverse. -
The pre sense front functions are not
available if there is a malfunction in the
adaptive cruise control* system
¢page
88 or ¢page 92.
- Keep in mind that pre sense front can
brake unexpectedly. Always secure any
cargo or objects that you are transport­
ing to reduce the risk of damage or in­
jury .
Settings in the Infotainment system
Applies to vehicles: wit h Audi pre sense front or A udi
adap tive c ru ise contro l
.,. Select in the MMI: I MENU I button> Systems
control button or Car systems > Driver as­
sistance
> Audi pre sense.
Switching the system on and off
Audi pre sense (System): If the system is
switched off, it switches on again automati­
cally once the ignition is switched on again.
System -Switch Audi pre sense on-off. With
this, you can switch the prewarning and the
braking intervention from Audi pre sense on
or off .
Prewarning -The distance and approach
warnings can be switched
on/off.
(D Tips
- If you restrict or switch off the ESC, the
pre sense also switches itself
off
¢ page 187.
-Switch the pre sense off when you a re
loading the vehicle onto a vehicle carrier,
train, ship or other type of transporta­
tion. This can prevent undesired warn­
ings from the pre sense system.
Driver messages
Applies to vehicles: wit h Audi pre sense o r A udi ada ptive
cruise co ntrol
Audi pre sense currently unavailable. No sen­
sor vision
This message appears if the sensor view is ob­
structed, for example by leaves, snow, heavy .,.

spray or dir t. Clean the sensor¢ page 82,
fig. 70.
Audi pre sense : off
This m essage appea rs whe n the ESC is swi tch·
e d to sport mode , fo r exam ple
¢ page 187 .
Audi pre sense: System fault!
This message appea rs when the pre sense
function is affected . For e xamp le, t his could
be caused by a faulty sensor .
If the message stays on, drive to yo ur au thor ­
ized A udi dealer or qualifie d repair facility to
h ave the ma lfu nction co rrected.
Audi pre sense 93
•