2015 AUDI S3 brake sensor

16 Instruments and indicator lamps
or
~~
&
CD
TPMS
;
or Electronic
Stabilizat ion Control
(ESC) ../
c:>page22
Electronic Stabilization Control
(ESC)
c:> page 189
USA models:
Anti-lock braking system (ABS)
defective../
c:> page22
Canada models:
Anti-lock braking system (ABS)
defective ../
c:>page22
USA models: Safety systems ../
c:>page 21
Canada models: Safety systems
,I
c:>page 21
Brake pads
c:>page22
Electromechanical parking brake
c:>page 19
Hill ho ld*
c:>page23
Tire pressure monitoring system
,I
c:> page264
Tire pressure monitoring system
c:>page264
Adaptive dampers*
c:>page26
or
or
or
or
or E
ngine control (gasoline e ngine)
,I
c:>page23
Eng ine control (diesel engine)../
c:>page23
Exhaust control system../
Qpage23
Diesel particu late filter*
Q page23
Engine speed limitation
Qpage24
Engine oil level (min.)
Q page24
Engine oil sensor
Qpage24
Engine temperature
Qpage20

80 Driving
To sti ll be able to start or stop t he engine, re­
fer to "Correcting a malfunction"
¢ page 79.
fll Key not in vehicle?
The fll ind icator light tu rns on and this mes­
sage appears if the conven ience key was re­
moved from t he vehi cle when the engine was
runni ng. If the conven ien ce key is no lo nger in
the vehicle, yo u cannot swi tch the ign ition on
or start the engine on ce yo u stop it . Yo u also
cannot lock the veh icle from the o utside .
Press brake pedal
This message appears if you do not press t he
b rake peda l when starting the engine .
Please engage N or P
This message appears whe n starting or stop­
p ing the engine if the se lecto r lever is not in
the Nor
P posit ion. The eng ine will not start/
stop.
Shift to P , otherwise vehicle can roll away.
Doors do not lo ck if lever is not in P
This message appears fo r safe ty rea sons
a long with a wa rning tone. I t ap pears if the
se lecto r lever for the automatic transm iss ion
i s not in the P position when sw itch ing the ig ­
n it ion off with the
! START ENGINE STOPI*
button . Sh ift the selector lever to t he P posi­
tion . O the rwise, the vehicle could ro ll. You al­
so cannot lock the vehicle usi ng the locki ng
sensor on the door handl e or us ing the con­
ve nien ce key.
Electromechanical
parking brake
Operating
The ele ctromechanical parking brake replaces
t he hand brake.
Fi g. 7 3 Center co nsole: Park ing b rake
.,. Pull the switch®¢ fig. 73 to set the park­
ing brake. The. (USA m odels)/ . (Cana­
da mode ls) indicator lights in the button
and in the instrument cluster display turn
on .
.,. To releas e the pa rking brak e, press the brake
or ac celera to r peda l wh ile the ignition is
sw itched on and pres s th e bu tton @ at the
same time. The . (USA mo dels) /. (Can ­
ada models) indica to r li gh ts in the bu tton
and i n the display turn off.
Your ve hicle is equipped wi th a n ele ctrome­
ch anical parking brake. The parkin g bra ke is
designed to p revent the vehicle from rolling
u nintentionally and replaces the hand brake.
In ad dition to the normal fu nctions o f a tra d i­
tio na l han d brake, the e lectromechanical
parking b rake provi des vario us convenience
and safety f unctions .
When starting from a stop
-The integral hill start assist helps yo u when
d riving by au toma tically releasi ng the pa rk­
ing brake ¢
page 82, Starting from a
stop.
- W hen start ing o n in clines, t he h ill sta rt as­
sist p revents the vehicle from unintentiona l-
ly ro lling back . The braking force of the
parking brake is not released unt il sufficient .,.

86 Audi adapti ve cruise control
Audi adaptive cruise
control
Introduction
Applies 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 regulat ing the speed
and maintaining a distance to the object
ahead, within the abilit ies of the system. If
the system detects an object, adaptive cru ise
con trol can brake and acce le rate your veh icle.
This makes driving more comfortable both on
long stretches of highway and in stop-and -go
traffic.
General Information
General information
Applies to vehicles: with Audi adaptive cruise control and
Audi pre se nse front
Fi g. 75 Front of veh icle: sensor
The genera l information applies to adaptive
cruise control * and pre sense front *
c:;, page 94.
The radar sensor a rea c::> fig. 75 m ust not be
covered w ith stickers, deposits or a ny other
obstructions as it may impair the function of
the adaptive cruise control and the pre sense
front. For information on cleaning, refer to
c:;, page 205. 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 on ly be detected when they are
within the sensor range
c::> page 87,
fig. 78.
-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 87.
-With stationary objects c::> page 87.
A WARNING
-
Always pay attent ion to traffic when adap­
tive cruise control is switched on and the
pre sense front is active
c::> page 94. As
the driver, yo u are still responsible for
start ing and for mainta ining speed and
d istance to other objects. The pre sense
front is used to ass ist you. The dr iver must
a lways take action to avo id a collision . The
driver is always responsible for braking at
the correct time.
- I ncorrect use of the adaptive cruise con­
trol can cause collisions, other accidents
and serio us personal injury.
- 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
hydroplaning). Us ing the system unde r
these conditions could result in a coll i­
sion .
- Switch adaptive cruise control off tempo­ rarily when driving in tu rni ng lanes, o n
expressway ex its or in construction
zones. This prevents the vehicle from ac­
celerating to the set speed when in these
situations .
- The adaptive c ruise control system will
not brake by itself if you put your foot on
the accelerator pedal. Doing so can over-
ride the speed and distance reg ulation . ..,_

....,
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-When approaching stationary objects
such as stopped traffic, adaptive cruise
control will not respond and pre sense
front will have limited function.
- The adaptive cruise control system and
pre sense front do not react to people,
animals, objects crossing the road or on­
coming objects.
- The function of the radar sensors can be
affected by reflective objects such as
guard rails, the entrance to a tunnel,
heavy rain or ice.
- Never follow a vehicle so closely that you
cannot stop your vehicle safely. The
adaptive cruise control cannot slow or
brake the vehicle safely when you follow
another vehicle too closely. Always re­
member that the automatic braking
function cannot bring the vehicle 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 sensor can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. The adaptive cruise control
and pre sense front may become impaired
as a result. Have an authorized Audi dealer
or authorized Audi Service Facility check
their function.
In curves
Applies to vehicles: with Audi adaptive cruise control and
Audi pre se nse front
Fig. 76 Example: driv ing into a curve
Audi adaptive crui se control 87
When driving into a curve q fig. 76 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
Applies to vehicles: with Audi adaptive cruise control and
Aud i pre sense front
Fig. 77 Example : object changing lanes and stat ionary
ob ject
Adaptive cruise control
The adaptive cruise control system only reacts
to objects that are moving or that the system
has already detected as moving. For example,
if a detected vehicle @turns or changes
lanes, the adaptive cruise control will not re­
act to a stopped vehicle@. Press the brake
pedal to slow your vehicle down .
Pre sense front
Pre sense front only reacts to stationary ob­
jects at low speeds.
Adaptive cruise control
Description
Applies to vehicles: with Audi adaptive cruise control
=--=~----
?!!!! = ';! ~~~~
Fig. 78 Detection ran ge

92 Audi adaptive cruise control
Setting the driving program
App lies to vehicles: with Audi adaptive cruise co ntrol
A adapt ive cru ise con trol driving progr am is
ad ju st abl e on vehicle s wi tho ut Aud i dr ive se ­
l ec t*.
"' Se lect in the M MI: the
I MENU I button > Car
> Systems * control button > Driver assi s­
tance > Adaptive cruise control > Driving
program > Comfort/Standard /Dynamic .
Selecting the driving mode
Applies to vehicles: with Audi adaptive cruise co ntrol
The adaptive cruise contro l driv ing program is
ad justab le for ve hicles w ith Aud i dr ive se lect
using the driving mode.
"' Se lect th e des ired driv ing mode
Comfort ,
Auto , Dynamic or Individual *
wit h the knob
t:;, page 106 .
Request for driver intervention
App lies to vehicles: with Audi adaptive cruise co ntrol
Fig . 84 In strum ent cluster: request fo r d rive r in terven ­
ti on
In some s ituations , the braki ng from the
adapt ive cruise control system is not enough
to maintain enough d istance to the object
ahead. In thes e situations, the system will re­
quest yo u to take action .
The . indicat or light and the graphic in the
d isplay w ill wa rn you about the danger
t:;, fig . 84 . You will a lso hear an aud io signa l.
Pr ess the brake pedal to s low y our veh icl e
down.
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 move d or is fa ulty. Drive to your
autho rized 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 No sen sor vi sion
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
t:;, p age 86 ,
fig. 75.
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.
IIJ,

94 Audi pre sen se
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 v ia a network of differe nt
vehicle systems and can take steps to prepare
the vehicle occupants for a potentia l collision.
The pre sense front works with a radar sensor
and a video came ra* .
It also functions within
the limits of the system when adapt ive 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 86, 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 20 mph (30 km/h) or higher.
The following functions can be triggered un­
der certain conditions within the limits of the
system:
- T ensioning of the safety be lts (for example,
during heavy braking) : The front safety belts
have reversib le be lt pretensioners. If a colli­
sion does not occur, the safety belts loosen
s light ly 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 dep loyment time is
adapted in dynamic mode.
A WARNING
-The pre sense basic cannot overcome natu- ral phys ica l laws.
It is a system designed to
assist and it cannot prevent a coll is ion. Do
not let the increased safety provided
tempt you into taking risks. This could in­
crease your r isk of a collis ion.
- The system can deploy incorrectly due to system-specific limits .
(D Tips
-Certa in pre sense bas ic functions switch
off when ESC is switched off (sport
mode) or when dr iving in reverse .
- The pre sense bas ic functions may not be
available if there is a ma lfunction in the
ESC system or the a irbag control mod­
ule .
- Note that with pre sense bas ic, 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 yo u 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 situat ions where an object ahead
brakes suddenly or if your own veh icle is trav­
eling at a high speed and approaching an ob ­
ject that is moving more slow ly . If detection is
not possible, then p re sense fro nt does not re ­
act.

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Warnings
Applies to vehicles: with Audi pre sense fro nt or Audi
adaptive cruise control
Fig . 85 In strum ent cluste r: approac h warnin g
The system recognizes various dangerous sit­
uat ions :
- 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 ob ject ahead brakes strongly,
you would not be able to avo id a coll ision.
T he indicato r light . indicates this.
- The
approach warning occurs when an ob­
ject ahead is traveling mo re slowly o r brake s
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 . 85 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. 85. 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 sp eed in th e event of a col-
....,
"' ll Thi s is no t a vailable in some coun tries . rl
Audi pre sense 95
lision . The message Audi pre sense -Input
also app ears .
- 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 86 , 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 lead to collisions,
other accidents and serious injuries. pre
sense front is an assistance system and
cannot prevent a collision by itself . The
driver must always intervene . The driver
is always responsible for braking at the
right time.
- Always pay attention to traffic, even
when pre sense front is switched on. Al-
ways be ready to intervene and take over
comp lete control of the vehicle whenever .,.

96 Audi pre sen se
it is necessary. A lways follow traffic laws
regarding mainta ining a safe distance
between your vehicle and vehicles ahead.
- pre sense front works within certain lim­
its and cannot react to situations that
are outside of the system lim its, such as
when approaching a stationary vehicle or
a stationary obstacle (the end of a traffic
jam or a vehicle that has broken down).
-Always keep i n m ind that the radar sen­
sor fo r pre sense front only works within
defined detection zones, which mea ns
other vehicles may not always be dete ct­
ed correct ly.
- T he function and range of the radar sen­
sor can be impaired by rain, snow and
heavy mist. Veh icles ahead may not be
detected right away, or not detected at
all.
- Reflective surfaces such as g uard rails or
entrances to t unnels may impair the
function of the radar sensor .
{[) Note
The senso r can be disp laced by impacts or
damage to the bumper, whee l housing and
underbody . The pre sense front sensor can
be damaged by this . Have your authorized
Aud i dea ler or authorized service facility
check the ir function.
(D Tips
- You can cance l the braking w ith increas­
ing force that is initiated by the system
by braking yourself, by accelerating no­
ticeab ly or by swerving.
- For information on dr iver messages
about pre sense, refer to¢ page 96.
- Keep in mind that pre sense can brake unexpectedly. Always secure any cargo or
objects that you are transporting to re­
duce the r isk of damage or injury .
- Certain pre sense front funct ions sw itch
off when ESC is sw itched off (sport
mode) or when drivi ng in reve rse .
- The pre sense front funct ions are not
available if there is a malfunction in the adaptive cru
ise cont ro l* system
¢ page
92 or ¢ page 96.
- Keep in mind that pre sense front can
brake abruptly. Always sec ure cargo or
objects that you transport to red uce the
r isk of damage or injury.
Settings in the Infotainment system
Applies to vehicles: with Aud i pre sense front or Aud i
adaptive crui se con trol
.,. Select in the MM I: I MENU I button > Car >
Systems * control button > Drive r assi st a nce
> Audi pre sense .
Switching the system on and off
Audi pre sense (Sys tem): If the system is
switched off, it switches on again automati ­
ca lly once the ignition is switched on aga in.
S ys te m -Swit ch A udi pre sense o n-off . With
th is, yo u can switch the p rewarning and the
braking intervention from Audi pre sense on
or off.
Prewarning -The distance and app roach
warnings can be switched
o n/off .
(D Tips
-If you restrict or sw itch off the ESC, the
pre sense also sw itches i tself off
¢page
190.
- Switch the p re sense off when you a re
loading the vehicle onto a veh icle carrier,
t rain, ship o r othe r type of transporta­
tion . This can prevent undesired warn ­
ings from the pre sense system .
Driver messages
Applies to vehicles: wit h Aud i pre sense or Aud i adapt ive
cruise control
Aud i pr e se nse curr ently un availabl e. No sen­
so r vi sion
This message appears if the sensor v iew is ob ­
structed, for examp le by leaves, snow , heavy
spray or d irt. Clean the sensor¢ page
86,
fig. 75.
Audi pre sense: off