sensor AUDI A4 2013 User Guide

100 Audi adaptive cruise control and braking guard
confirmed by the video camera, an acute
collision warning.
- 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 conditions could result in a colli­
sion.
- Switch adaptive cruise control off tempo­
rar ily when driv ing in turning lanes, on
expressway exits or in construc tion
zones. This prevents the vehicle from ac­
celerating to the set speed when in these
situations.
- Th e adaptive cruise 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 adaptive cr uise control system and
braking guard do not react to people, an­
ima ls, objects crossing the road or on­
coming objects .
- The function of the radar sensor 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
ano ther 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.
{[) Note
The sensor can be d isp laced by impacts or
damage to the bumper, whee l housing and
underbody . That could affect the adaptive cruise control system and b
raking guard.
Have your authorized Audi dea ler or au­
thorized Audi Service Facility check their
function.
, In curves
Applies to vehicles: wit h Aud i adapt ive cr uise contro l
Fig . 111 Examp le: driv ing into a curve
When driving into a curve <=> fig. 111 and out
of a curve, the adaptive cruise control may re­ act to a vehicle in the next lane and app ly the
brakes. You can override or prevent the brak­
ing by pressing the accelerator pedal briefly.
Stationary objects
Applies to vehicles: with Aud i adaptive crui se contro l
Fig. 112 Examp le: object chang ing lanes a nd station ­
a ry object
The adaptive cru ise control system only reacts
to objects that are moving or that the system
has a lready detected as moving. For example,
if a vehi cle@ , which has already been detect­
ed by the adaptive cruise control, turns or
changes lanes and another stationary vehicle
@ is located in front of that vehicle, the sys­
tem will not react to the stationary vehicle.

Audi adaptive cru ise control and brakin g guar d 101
Vehicles with manual transmission
App lies to vehicles: with Audi adaptive cruise control
The adaptive c ruise control is avai lab le from
the 2nd gear through the 6th gea r in the cus­
tomary RPM.
When the adapt ive cruise control is turned on,
you must p ress the clutch to shift gears (as
usual) . When sh ifting normally or when press­
ing the cl utch, the adap tive c ruise control re­
mains turned on.
Afte r you have engaged the gear, you do
not
need to press the gas peda l. The adaptive
cru ise control accelerates automat ica lly if nec­
essary.
I f you press dow n on the clutch fo r too long or
shift/coup le improperly, the adaptive cruise
control may turn off automat ically.
{D) Tips
You cannot tu rn on the adapt ive cru ise
contro l during a sh ifting operation.
Audi adaptive cruise
control
Description
App lies to vehicles: with Audi adaptive cruise control
Fig . 11 3 Detect ion range
What c an Audi adapt ive crui se cont rol d o?
The adaptive cruise control works in conjunc ­
tion with a radar sensor installed in the front
of the vehicle
¢page 99, fig. 110, which is
subject to desig nated system limits
<=:> page 101 . Stationary objects are disregard­
ed . On open
roads with no traffic, adaptive cr uise
control works like a regular cruise contro l sys­
tem. The stored speed is maintained . When
approaching a moving vehicle detected up
ahead, the adaptive cruise control system au­
tomat ica lly slows down to match that vehi ­
cle's speed and then maintains the distance
that the dr iver previously stored . As soon as
the sys tem does not detec t a vehicle up
ahead, adaptive cruise cont ro l ac celerates
back up to the stored speed .
Which functions can be controlled?
When you switch adapt ive cruise control on,
you can set the cu rrent speed as the "contro l
speed "
¢ page 102, Switching on and off.
When dr iving, you can stop cru ise contro l
¢page 103 or change the speed ¢page 103
at any time.
You can also set the distance to t he object
ahead and set the adapt ive cru ise control driv ­
ing program
¢ page 104 .

Audi adaptive cruise control and braking guard 105
Setting the driving mode for vehicles with
Audi drive select*
Refer to r=;,poge 1 14 .
(D Tips
Yo ur setti ngs a re automatically store d an d
assig ned to the remote contro l key be in g
used.
Request for driver intervention
A pp lies to vehicles: w ith Audi a daptive cruise control
Fig. 119 Inst rumen t cl uster: reques t fo r drive r in te r·
ve ntio n
In ce rtain si tuations, t he sys tem w ill prom pt
you to take actio n. This cou ld ha ppen, for ex­
ample, if braking by the a daptive cr uise con ­
trol system is not enough to maintain enough
d istance to the vehicle ahead.
The inst rument cluste r will war n you about
the danger
r=;,fig. 119:
- A red ve hicle is pic tured in the d is pla y.
- The text
DISTANCE! appea rs in the s ta tus
b ar.
- T he r ed indi cator lig ht
I blinks .
- In add it ion, a warning tone sounds.
Audi braking guard
Description
App lies to vehicles: wi th Audi ada ptive c ruise con tro l
Fig. 120 In str um ent clus ter: approach warnin g
Brak ing guard uses a radar sensor. It also
funct ions wit hin the lim its of the system
whe n adapt ive cruise control is switched off.
What can Audi braking guard do?
When detected in time, the system can assess
situations when a veh icle ahead brakes s ud­
denly or if your own vehicle is t raveling at a
high speed and approac hing a ve hicle up
ahead that is movi ng mo re sl ow ly. B raking
guard does not reac t if it cannot detec t the
s ituation.
The system advis es yo u of various s ituations:
- The
distance wa rning is given if yo u are too
close to the vehicle ahead for a long time. If
the vehicle ahead bra kes sharply , yo u will
not be ab le to avoid a collision . The ind icator
light
I in the d isp lay comes o n.
- The
approach warning is given when a de­
tected ve hicle up ahead i n your lane is mov­
ing m uch mo re sl owly than you are or if i t
brake s sh arp ly. W hen t his war ning is g iven,
it may on ly be poss ible to avoi d a co llision
by swe rving or b ra kin g sharp ly. The indic ator
light
I a nd indic ator in t he di spl ay w ill war n
you abo ut the d ange r¢
fig . 120. You will a l­
so hear an aco ustic s ignal.
If y o u do no t rea ct fas t eno ugh o r do not r eact
at all to the si tuat ion, B rak ing guard will in­
t e rvene by b rak ing and t he message
braking
guard intervention
w ill appea r.

106 Audi adap tive cruise control and br aking guard
- If a co llision is imminent, the system will
first provide an
acute warning by bri efly and
sharp ly app ly ing the brakes .
- If you do not react to the ac ute warning ,
braking guard can brake within the limits of
the system. This reduces the veh icle speed
in the event of a collision.
- At speeds under 20 mph (30 km/h), the sys ­
tem can in it iate a complete deceleration
s hortly before a collision .
1>.
- If the braking guard senses that you are not
braking hard enough when a collision is im­
minent, it can increase the braking force.
Which funct ion s can be contr oll ed ?
You can switch braking guard and the dis­
tance/approach warning on or off in the radio
or MM I c> poge 106, Settings in the radio/
MMI.
A WARNING
Lack of attention can cause col lisions, oth­
er accidents and serious personal injuries.
The braking guard is an assist system and
cannot prevent a collis ion by itself. The
driver must always intervene . The driver is
always responsib le for bra king at the cor­
rect time.
- Always pay close attention to traffic,
even when the brak ing guard is switched
on. Be ready to intervene and be ready to
take complete control whenever necessa­
ry. A lways keep the safe and legal dis­
tance between your vehicle and vehicles
up ahead.
- Braking guard works w ith in limits and
will not respond outs ide the system lim­
its, for example when approaching a
stopped vehicle or stationary obstacle
(end of a traff ic jam or veh icle that has
broken down in traffic).
- Always remember that the radar sensor
for the braking guard works only within
defined detection and range limits that
l ) Th is is not available in some c oun tri es.
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 veh icles up ahead may not
be prompt ly detected or may not be de­
tected at all .
- Reflective surfaces including crash barri­
ers or tunne l entrances may impair the
function of the radar sensor .
(D Tips
- You can cancel the braking that is in it iat­
ed by the system by braking yourse lf, by
accelerating not iceably or by swerving .
- Braking guard error messages
c>poge 107.
- Keep in mind that brak ing guard 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 radio/MMI
Applies to vehicles: with Audi adaptive cruise control
., Select: I CAR I function button > Car sys­
tem s*
contro l button > Driv er a ssist > Au di
br aki ng g ua rd .
Or
., Select: !CAR ! function b utton > Aud i brak-
ing gu ard .
S ys tem -
Switch A udi braking guard On and
Off . When you switch the ignition on, the
message
Audi b raking gu ard off appears if
the system is switch ed off .
Ea rly warnin g -The distance and approach
warnings in the display can be switched
On /
Off .
(D Tips
-Yo ur settings are automatically stored
and assigned to the remote contro l key
being used at the times the settings are
made.

Audi adaptive cru ise control and brakin g guar d 107
-Sedan: I f you switch the A SR/ESC off,
braking guard switches off automatically
¢ page 187 .
-allroad : If you switch the offroad mode
on, braking g uard switches off automati­
cally
¢ page 188.
-Switch braking guard off when you are
l oading the veh icle onto a vehicle carr ier,
tra in, sh ip or other type of transporta­
tion. This can prevent undesired warn­ i ngs from the braking guard system .
Messages
Applies to vehicles: with Audi adaptive cruise co ntrol
B rak ing guard: Off
This driver message appears if the system is
turned off via the radio/MM I*. Otherwise, if
the system is turned off, the information ap ­
pears every time shortly after the start of the
tr ip.
B ra king gua rd: Act ivated
This drive r message appe ars if sharp brake
pressu re was applied due to an acute warning.
•••
Three white dots appear if a setting cannot be
selected with the operat ing lever . For exam­
p le, this happens if you want to raise/lowe r
the speed even though there was no p revious­
l y saved speed.
AC C: D eactiv ation
The driver message appears in vehicles with
manual transmission . If the clutch pedal was
pressed down for too long, the adaptive cruise
control turns off. A chime sounds as a rem ind­
er.
ACC : Sensor blocked
This message appears if the sensor view is ob­
structed, for example by leaves, snow, heavy
spray or dirt. C lean the sensor ¢
page 99,
fig. 110.
ACC: not available
The drive r message appears if there is a ma l­
f u nction. The adap tive cruise cont rol tu rns off. A chime sounds as a
reminder. Have the sys­
tem checked by an authorized Audi dea ler or
authorized Aud i Service Fac ility.
ACC: unavailable
The driver message appears if, for example,
t h e b ra ke tempe ratu re is too hig h. T he adap­
tive cru ise con trol is temporarily u nav ail able.
A ch ime sounds as a remin der .
Engine sp eed !
This dr iver message appears in vehicles with
manua l transm ission if the drive r had not up­
shifted or dow nsh ifted in t ime w hile using
adaptive c ruise contro l braking or accelerat­
ing, caus ing the veh icle to exceed or not reach
the pe rm itted lim it speed. The adap tive cruise
control turns off. A chime sounds as a remind­
er.
Shift lev er po sition!
Vehicles with an automat ic t ransm iss ion: the
drive r message appears if the se lecto r lever is
sh ifted to the N position. The adapt ive cruise
c o ntrol is not ava ilable while in th is posit ion.
Vehicles with manua l transm ission: the driver
message appears for vehicles with manua l
transmission if there is no forward gea r en­
gaged, meaning if the reverse gea r or the 1st
ge ar is engaged o r if the sele ctor leve r is i n
the ne utra l posi tion. The ad apt ive cr uise con­
tro l is not available while in th is posi tion.
Stabilization control (ESC )
This message appears if the e lectronic stab ili­
zation control (ESC) is taking action to stab i­
liz e the veh icle. The adaptive c ruise co ntrol
turns off. A chime sounds as a reminder .
Speed too low
This message appears if the current speed is
too low
to set or to maintain the desired
speed.
T he speed being saved must be at least
20 mp h (30 km/h). The cru ise contro l is
turned off for speeds lowe r than 12 mph
(20 km/h). The adaptive cruise control re­
mains turned on for speeds above 95 mph

Audi side assist Lane change assistant
Description
Applies to vehicles: with Audi side assist
Fig . 12 1 Sensor dete ction ra n ge
Fig . 122 Disp la y on t he e xterio r mirro r
Side assist he lps you mon itor your blind spot
and traffic behind you r veh icle. W ith in the
limits of the system, it warns you about
vehicles that are coming closer or tha t are
traveling w ith you within sensor ra nge
(D
o:;, fig . 121: if a lane change is class ified as crit­
ical, the display @ in the exterior mirror
o:;, fig. 122 turns on.
T he display in the left exterior mirror provides
assistance when making a lane change to the l eft, while the display in the right exter ior mir­
r or p rov ides assistance when making a lane
change to the right .
Information stage
As long as you do not activate the turn signal,
side assist
informs you about vehicles that are
detected and class ified as crit ical. The display
i n the respective mirror turns o n, but is d im .
Aud i side assist 109
The display remains d im intentionally in the
information stage so that your view toward
the front is not disturbed .
Warning st age
If you activate the turn signal, s ide assist
warns you about veh icles that are detected
and classified as critical. The display in the re ­
sp ective mirror blinks brightly . If this hap­
pens, check traff ic by glanc ing in the rearview
mirror and over your shoulder ¢
A in General
information on page 110 .
@ Tips
-You can adjust the brightness of the dis­
play @¢
page 111 .
-Please refer to the instructions for tow­
ing a trailer located in
¢page 110.

110 Audi side assist
General information
App lies to vehicles: with Audi side assist
®
©
Fig. 12 3 Driving s it u at ions
AU Dr- l
• •
Fig . 124 Rear of th e ve hicle: pos it io n of t he se nso rs
Side assis t fu nctions at speeds above ap prox i­
ma tely 19 mph (30 km/h).
(D V ehicles that are approaching
In certain cases, a vehicle will be classified as
cr itical for a lane change
even if it is still
somewhat far away. The fas ter a vehicle ap­
p ro aches, the sooner the disp lay in the exteri­
or m irror will t urn on.
@ Vehicles traveling with you
Vehicles traveling w ith you are indicated in the
exterior m irror if they are classified as cr it ical
for a lane change. All vehicles detec ted by
side assis t are in dicated by the time they en­
ter your "blind spot", at the latest.
@ Vehicles left behind
If you s low ly pass a ve hicl e tha t sid e ass ist has
dete cted ( the difference in s peed between the
vehicle and you r vehicle is less than 9 mph
(15 km/h)), the display in the exter io r mirro r
turns on as soon as the vehicle enters your blind spot.
The disp lay wi ll not t urn on if you quickly pass
a vehicle that s ide assist has detected (t he d if ­
f erence in speed between the ve hicle and your
vehicle is greater than 9 mph (15 km/h)).
Functional limitations
T he radar senso rs are des igned to detect the
left and right adjacent lanes whe n the road
l anes a re the normal width. In certain situa­
t ions, the d isp lay in the exterior mirror may
turn on even though there is no ve hicle locat­
ed in the area that is cr itical fo r a lane cha nge.
For example:
- if the lanes are narrow or if your are driving on the edge of your lane. If this is the case,
the system may have detected the vehicle in
another la ne that is
not adjacent to your
cur rent lane .
- if you a re driving through a c urve . Side assis t
may react to a vehicle that is one lane ove r
from the ad jacent lane .
- if side assist reacts to other objects (such as
high or d isp laced gua rd rails) .
- In poor weather conditions. The side assist fu nctions are limited .
Do not
cover the radar sensors c::> fig. 124 with
stickers, depos its, bicycle wheels or other ob­
jects , because this will affect the funct ion. Do
not use s ide ass ist when tow ing a trail er. For
information on cleaning, refe r to
c::> page 205 .
&_ WARNING
-Always pay a tten tion t o traffic and to the
ar ea around your ve hicl e. Side a ssist can ­
no t repla ce a driver's attention. The driv ­
er a lone is always respons ible fo r lane
cha nges a nd similar driving mane uvers.

-Improper reliance on the side assist sys­
tem can cause collisions and serious
personal injury:
- Never rely only on side assist when
changing lanes.
- Always check rear view mirrors to make
sure that it is safe to change lanes.
- Side assist cannot detect all vehicles un­
der all conditions- danger of accident!
- Please note that side assist indicates
there are approaching vehicles, or
vehicles in your blind spot, only after
your vehicle has reached a driving speed
of at least 19 mph (30 km/h).
- In certain situations, the system may not
function or its function may be limited.
For example:
- if vehicles are approaching or being left
behind very quickly. The display may
not turn on in time.
- in poor weather conditions such as
heavy rain, snow or heavy mist .
- on very wide lanes, in tight curves or if
there is a rise in the road surface .
Vehicles in the adjacent lane may not
be detected because they are outside
of the sensor range.
(D Note
The sensors can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. This can affect the system .
Have your authorized Audi dealer or au­
thorized Audi Service Facility check their
function.
(D Tips
- If the window glass in the driver's door
or front passenger's door has been tint­
ed, the display in the exterior mirror may be misinterpreted.
- For Declaration of Compliance to United
States FCC and Industry Canada regula­
tions
~page 283.
Audi side assist 111
Activating and deactivating
Applies to vehicles : wi th Aud i side ass ist
Fig. 125 Driver 's doo r: Side assis t button
.,. Press the button c> .&. in General informa­
tion on page 110
to switch the system on/
off . The LED in the button turns on when
side assist is switched on.
Adjusting the display brightness
App lies to vehicles: wit h Audi side ass ist
The signal brightness can be set in the radio
orMMI* .
.,. Select: I CAR I function button > Audi side as­
sist.
.,. Select: I CAR ! function button > Car sys­
tems*
control button > Driver assist > Audi
side assist .
The display brightness adjusts automatically
to the brightness of the surroundings, both in
the information and in the warning stage . In
very dark or very bright surroundings, the dis­ play is already set to the minimum or maxi­
mum level by the automatic adjustment. In
such cases, you may notice no change when
adjusting the brightness, or the change may
only be noticeable once the surroundings
change.
Adjust the brightness to a level where the dis­
play in the information stage will not disrupt
your view forward. If you change the bright­
ness, the display in the exterior mirror will
briefly show the brightness level in the infor­
mation stage. The brightness of the warning
stage is linked to the brightness in the infor­
mation stage and is adjusted along with the
information stage adjustment.

112 Audi side assist
- Side assist is not active wh ile you are
making the adjus tment.
- Your settings are automatica lly sto red
and ass igned to the remote control key
being used.
Driver messages
App lies to vehicles: with Audi side assist
If s ide ass ist switches off by itse lf, t he LED in
the butto n tur ns off a nd a message will ap­
pear in t he instr ume nt cl uster d is p lay:
Audi side assist unavailable : Sensors blocked
T he radar sensors' vision is a ffected. Do not
cover the area in front of the senso rs with bike
wheels, stickers, dirt or other objects . Clean
the area in front of the sensors, if necessary
c::;,page 110, fig. 124.
Audi side assist : Currently unavailable
Side assist can not be swi tched on tempora ril y
bec ause there is a mal func tio n (for ex am ple,
the ba ttery cha rge leve l may be too low) .
Audi side assist : System fault!
The system ca nnot guara ntee that it w ill de­
tec t ve hicles co rrec tly and it is sw itched off .
Th e senso rs have been displaced o r are faulty .
H ave the sys tem che cked by an au thor ized
Au di d eale r or auth oriz e d Au di S ervice Fa cility
soon .
Audi side assist : Unavailable when towing
Side assist sw itches off automatically when a
factory- insta lled trailer hitch is connected to
the elec trical connector on the trailer . There is
no guarantee the system will switc h off when
usi ng a retrofitted t railer hi tch . Do not use
si de assis t when towing a tra iler .

Audi drive select Driving settings
Introduction
Appl ies to vehicles: wit h Audi drive select
Drive select provides the possibility to experi­
ence different types of vehicle settings in one
veh icle. For instance, using the three
Com­
fort, Auto and Dynamic modes, the driver can
switch from a sporty to a comfortab le driving
mode with the press of a button.
Addit ionally, in vehicles with
MM I*, the vehi ­
cle setup for
Individual* mode can be cus­
tomized by you. This makes it possib le to
combine settings such as a sporty engine tun­
ing with comfortable steering.
A WARNING
Improper use of the Audi drive select can
cause collisions, other acc idents and seri­
ous personal injury.
Description
Applies to vehicles: w it h Audi drive select
The vehicle setup in each mode depends on
the vehicle's features. However, the engine,
automatic t ransmission* and steering are al­
ways involved.
-
Engine and automatic transmission*
Depending on the mode, the engine and the
automatic transmission respond quicker or in
a more ba lanced manner to accelerator pedal
movements. In the sporty dynamic mode, the
automatic transmission shifts at higher RPMs .
Steering
The steering adapts in terms of steering effort
and steering ratios. Indirect steer ing that
moves easily, like the steering in comfort
mode, is best su ited to long dr ives on a high­
way. In contrast, dynamic mode prov ides
sporty, direct steering.
The follow ing applies to vehicles with dynam ic
steer ing*: the steering ratio changes based on
veh icle speed in order to maintain optimum
Audi drive select 113
steering effort for the driver at all times. This
sets the steering to be less sensitive at higher
speeds in order to provide improved vehicle
control. At reduced speeds, however, steering
is more direct in order to keep the steering ef­
fort as minimal as possible when the driver is
maneuveri ng the vehicle . At low and average
speeds, dynamic steering addit iona lly pro­
vides more responsive steering performance.
Adaptive dampers*
The adaptive dampers* use sensors to record
information regarding steering movements,
braking and acceleration operations by the
drive r, road surface, driving speed, and load.
T his makes it possible to adapt damp ing to
the driving situation virtually i n rea l time.
Drive select also makes it possible to satisfy
the desire for sporty suspension (Dynamic)
and comfortab le suspension (Comfort) with­
out giving up balanced tuning (Auto) .
Sport differential*
As a component of the all wheel dr ive system
(quattro ®)
q poge 191, the sport differential*
distributes the driving power to the rear axle
depending on the situation . The distribution
of power varies depending on the mode se­ lected. The goal is a high level of agility and
ability to accelerate on curves . The vehicle is
very respons ive to steering .
Audi adaptive cru ise control*
The behavior when accelerating can be adjust­
ed from comfortab le to sporty, depending on
the drive select mode. Adaptive cruise control
also responds to the driving behavior of the
vehicle ahead in a more conservative or sporty
manner .
Engine sound*
The sound of the engine is adapted to the se­
lected mode and ranges from subtle to sporty.
0) Tips
-In some models, the maximum vehicle
speed can only be reached in the
Auto
and Dynamic modes.