sensor AUDI A4 2015 User Guide

"" N
0 ::.,: co ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Audi adaptive cru ise control and brakin g guar d 103
Vehicles with manual transmission
Applies 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. 1 16 Detect ion range
What can Audi a dapt 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 101, fig. 113, which is
subject to designated system limits
<=:> page 103 . Stationary objects are disregard­
ed . On open roads with no traffic, adaptive cruise
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 ically slows down to match that vehi ­
cle's speed and then maintains the distance
that the driver previously stored . As soon as
the system does not detec t a vehicle up
ahead, adaptive cruise contro l ac celerates
back up to the stored speed .
Which functions can be controlled ?
When you switch adaptive cruise control on,
you can set the current speed as the "contro l
speed "
¢ page 104, Switching on and off.
When dr iving, you can stop cru ise control
¢ page 105 or change the speed ¢page 105
at any time.
You can also set the distance to the object
ahead and set the adapt ive cru ise control driv ­
ing program
¢ page 106 .

M N
~ co
rl I.O
"' rl
"' rl
Audi adaptive cruise control and braking guard 107
Setting the driving mode for vehicles with
Audi drive select*
Refer to <=> page 116.
(D Tips
Your settings are automatically stored and
assigned to the remote control key being
used.
Request for driver intervention
Applies to vehicles: with Audi adaptive cruise control
Fig. 122 Inst rumen t cl us ter: reques t for drive r inte r·
vention
I n ce rtain situat ions, the system will prompt
you to take action . This cou ld happen, for ex­
ample, if braking by the adaptive cruise con­
trol system is not enough to maintain enough
distance to the vehicle ahead.
The instrument cluster will warn you about
the danger<=>
fig. 122:
- A red vehicle is pict ured in the disp lay.
- The text
DISTANCE! appears in the status
bar.
- T he red ind icator light . blinks.
- In add ition, a warning tone sounds.
Audi braking guard
Description
Applies to vehicles: with Audi adaptive cruise control
Fig. 123 Instr ument cluster: approach warning
Braking guard uses a radar sensor. It also
functions within the limits of the system
when adapt ive cruise control is switched off.
What can Audi braking guard do?
When detected in time, the system can assess
situations when a vehicle ahead brakes sud­
denly or if your own vehicle is traveling at a
high speed and approaching a vehicle up
ahead that is moving more slowly. Braking
guard does not react if it cannot detect the
s ituation.
The system advises you of various situations:
- The
distance warning is given if you are too
close to the vehicle ahead for a long time. If
the vehicle ahead brakes sharply, you will
not be able to avoid a collision . The indicator
light . in the display comes on .
- The
approach warning is given when a de­
tected vehicle up ahead in your lane is mov­
ing much more slowly than you are or if it
brakes sharply. When thi s war ning is given,
it may on ly be possible to avoid a co llision
by swerving or brak ing sharp ly. The indicator
light . and indicator in the display will
warn you about the danger
r=.> fig. 123. You
wi ll also hear an acoustic signal.
If you do not react fast enough or do not react
at all to the situation, Braking guard will in­
te rvene by brak ing and the message
braking
guard intervention
wi ll appear. ~

108 Audi adapti ve cruise control and br aking guard
- If a co llision is imminent, the system will
first provide an
acute wa rning 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 collis ion.
- At speeds under 20 mph (30 km/h), the sys ­
tem can in it iate a complete deceleration
s hortly before a collision
l) .
-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 function s can be contr oll ed ?
You can switch braking g uard and the dis­
tance/approach warning on or off in the radio
or MM I c> poge 108, Settings in the radio/
MMI.
A WARNING
Lack of attention can cause col lisions, oth­
er accidents and serious persona l injuries.
The b raking guard is an assist system and
cannot p revent a col lis ion by itself. The
dr iver m ust always in tervene . T he d rive r is
always responsib le for br aking at the cor­
rect time.
- Always pay close attention to traffic,
even when the bra king 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 wo rks 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 109.
- 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
App lies to vehicles : wit h Audi ada ptive cr uise contro l
., Select: !CARI function button> Car sy ste m s*
contro l but ton > Driver a ssist> Audi brak ­
ing guard .
Or
., Select: !CAR I function button> Audi b raking
gua rd.
S ys tem -
Switch A udi braking guard On and
Off . When you switch the ignition on, the
message
Audi b raking guard 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 s tored
and assigned to the remote contro l key
being used at the times the settings are
made.

'"" N
0 ::.,: co ,...., \!) ..,.,
,...., ..,., ,....,
Audi adaptive cruise control and braking guard 109
-If you restrict or switch off the ESC, the
braking guard also switches itself off
¢page 187.
- Switch braking guard off when you are
loading the vehicle onto a vehicle carrier,
tra in, ship or other type of transporta­
tion. This can prevent undesired warn­ i ngs from the braking guard system.
Messages
App lies to vehicles: with Audi adaptive cruise co ntrol
Braking guard: Off
This driver message appears if the system is
turned off via the radio/MM!*. Otherwise, if
the system is turned off, the information ap­ pears every time shortly after the start of the
tr ip.
The driver message also appears if the system is not avai lab le due to a malfunction or if the
ESC is not switched on¢
page 187. If this is
the case, the system will not provide warnings
about a possible collision.
Braking guard: Activated
This driver message appears if sharp brake
press ure was applied due to an acute warning.
•••
Three wh ite dots appear if a setting cannot be
selected with the operat ing lever . For exam­
p le , this happens if you want to raise/lower
the speed even though there was no previous­
l y saved speed .
ACC: Deactivation
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. Clean the sensor¢
page 101,
fig. 113.
ACC: not available
The driver message appears if there is a mal­
function . The adaptive cruise contro l turns off .
A chime sounds as a reminder. Have the sys ­
tem checked by an authori zed Aud i dea ler or
authorized Aud i Service Fac ility.
ACC: unavailable
The driver message appears if, for example,
the brake temperat ure is too high. The adap­
tive cruise control is temporarily unavailable .
A chime sounds as a reminder.
Engine speed!
This driver message appears in vehicles with
manua l transmission if the driver had not up­
shifted or downs hifted in time while using
adaptive cruise control braking or accelerat­
ing, caus ing the vehicle to exceed or no t reach
the permitted limit speed. The adaptive cruise
control turns off. A chime sounds as a remind­
er .
Shift lever position!
Vehicles with an automat ic transmission: the
driver message appears if the selecto r lever is
shifted to the N position. Th e adaptive cruise
control is no t available while in this position.
Vehicles with manua l transm ission: the driver
message appears for vehicles with manual
transmission if there is no forward gear en­
gaged, meaning if the reverse gear or the 1st
gear is engaged or if the selector leve r is in
the neutral position . The adaptive cr uise con­
trol is not available while in th is position.
Stabilization control (ESC)
This message appears if the electronic stabili­
z ation control ( ESC) is taking action to stab i­
lize the vehicle. The adaptive cruise contro l
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 .
The speed be ing saved must be at least
20 mph (30 km/h). The cruise control is
turned off for speeds lower than 12 mph

Audi side assist Lane change assistant
Description
Applies to vehicles: with Audi side assist
Fig . 124 Sensor dete ction ra n ge
Fig . 12 5 Disp la y on th e e xterio r mirro r
Side assist he lps you mon itor yo ur 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
c::, fig . 124 : if a lane change is class ified as crit­
ical, the display @ in the exterior mirror
c::> fig. 125 turns on.
The display in the left exterior mirror provides
assistance when making a lane cha nge to t he
l eft, while the display in the right exter ior mir­
r or p rov ides assistance when making a lane
change to t he 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 ica l. The display
M N in the respec tive mirro r turns o n, but is d im .
~ co
rl I.O
"' rl
"' rl
Aud i side assist 111
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 ­
spective 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 112 .
@ Tips
-You can adjust the brightness of the dis­
play @¢
page 113 .
-Please refer to the instructions fo r tow­
ing a trailer located in
¢ page 112.

112 Audi side assist
General information
App lies to vehicles: with Audi side assist
®
©
Fig. 126 Driving s it u at ions
AU Dr- l
• •
Fig . 12 7 Rea r 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).
@ 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. 127 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 202 .
&_ 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.

M N
~ co
rl I.O
"' rl
"' rl
-Improper reliance on the side assist sys­
tem can cause collisions and serious
personal injury:
- Never rely only on side assist when
ch anging lanes.
- Always check rear view mirrors to make
sure that it is safe to change lanes.
- Side ass ist cannot detect a ll vehicles un­
der all cond itions- dange r of accident!
- Please note that side assist indicates
ther e ar e approaching vehicles, o r
vehicles in your bli nd spot, o nly afte r
yo ur vehicle has r eached a driving speed
o f at least 19 mph (30 km/h).
- In certain s ituati ons, the system may not
f unc tion or its funct io n may be lim ited.
For example:
- if veh icles are approaching or be ing left
behind very quick ly. The display may
not turn on in time.
- in poor weather condit ions such as
heavy ra in, snow or heavy m ist .
- on very wide lanes, i n tight curves or if
there is a rise in the road surface .
Vehicles in the adjacent lane may not
be detec ted becaus e they are outside
of t he senso r range.
(D Note
The sensors can be displaced by impacts o r
damage to the bumper, whee l housing and
unde rbody. This can affect the system .
Have your author ized Audi dealer or au­
t hori zed A udi Service Fa cility check the ir
function.
(D Tips
- If the window g lass in t he d river's doo r
or front passe nger's door h as bee n tint­
ed, the disp lay in the exterior m irror may
be misinterpre ted.
- Fo r De clarat ion of Compliance to Uni ted
Sta tes FCC and Indus try Canada regula­
tions~
page 286.
Aud i side assist 113
Activating and deactivating
A pp lies to vehicles : wi th Aud i side ass ist
F ig. 128 D river 's doo r: Side ass is t button
.,. Press the b utton ~ A in General informa ­
tion on page 112
to switch the system on/
off . The LED in the button turns on when
side assist is switched on.
Adjusting the display brightness
A pp lies to vehicles: wi th Audi side ass ist
The signal brightness can be set in the radio
orMMI* .
.,. Select: !CAR ! function button > Audi side as­
sist .
.,. Select: I CAR I function button > Car systems *
control button > Driv er a ssist > Audi side
as sis t.
The display br ightness adjusts automatically
to the brig htness of the sur roundings, both in
the info rmation and in the warning stage . In
very dark or very bright su rroundings, the dis­
play is already se t to the m inimum or maxi­
mum level by t he autom atic adjus tme nt. I n
s uch cases, you may notice no change when
adjusting t he b rig htness, or the change may
only be noticeable once the s urroundings
change.
Adjus t the brightness to a leve l where the dis­
play i n the information stage w ill not d is rupt
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 i nfor­
mation stage and is adjusted along with the
i nformation stage adjustment. ..,_

114 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 112, fig. 127.
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
App lies to vehicles: with Audi drive select
Drive select provides the possibility to experi­
ence diffe rent types of vehicle sett ings in one
vehicle. 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: with 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 acce lerator 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, di rect steering.
0
11'5 The follow ing applies to vehicles with dynam ic ,....,
~ steer ing*: the steering ratio changes based on
~ vehicle speed in order to maintain optimum ,....,
Audi drive select 115
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 veh icle . 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
driver , road surface, driving speed, and load.
T his makes it possible to adapt damp ing to
the driving situation v irtually 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 whee l dr ive system
(quattro)
~ page 190, 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 cruise 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.

118 Park assist
Park assist
Parking system
Applies to vehicles: with pa rking system
Different park assist systems may be used for
parking or maneuvering, depending on the
vehicle's features.
Parking system (rear)*:
For the parking system (rear), the acoustic
park assist system is installed in the rear of
the vehicle
¢ page 118.
The rear parking assist system uses ultrason ic
sensors to determine the distance of the vehi­
cle from a detected obstacle. There are a tota l
of four sensors located on the rear bumper
(two in the m iddle and two on the sides).
Parking system (rear, with rear view
camera)*:
For the parking system (rear, with rear view
camera),
the rear acoust ic park assist system
is integrated in the rear of the vehicle and the
rear view camera is integrated in the rear lid
¢page 121.
The parking system (rear, with rear view cam­
era)
uses ultrasonic sensors to determine the
distance of the vehicle from a detected obsta­
cle . There are a total of four sensors located
on the rear bumper (two in the middle and
two on the sides).
_& WARNING
Make sure the sensors are not covered by
stickers, deposits or any other obstruc­
tions as it may impair the sensor function.
For information on cleaning, refer to
qpage 202.
Parking system (rear)
Rear acoustic park assist
Applies to vehicles: with parking system (rear)
The rear acoustic park assist warns you of ob­
stacles or objects behind your car .
Description
The rear acoustic parking assist system deter­
mines the distance of the vehicle from an ob­
stacle using ultrasonic sensors. There are 4
sensors in the rear bumper.
The range at which the sensors start to meas­
ure is
about:
To the sid e 2 ft (0 .60 m)
Center rear 5.2 ft (1.60 m)
Activation
Acoustic parking assist is activated automati­
ca lly when
reverse gear is engaged. A brief
tone confirms that the system is activated.
Warning tones
Distance warning is given by warn ing tones
wh ich are generated by the rear signa l genera­
tor. The volume and the pitch of th e warning
tones can be adjusted in the MMI*
¢page 119.
Reversing
Distance warning when reversing starts when
an obstacle is detected in the range of the
parking assist system . As the distance de­
creases, the time interval between the a udible
tones becomes shorter.
When the distance is less than 1ft (0.30 m),
the tone becomes continuous. At this point
you should stop backing up .
Please note that low objects already signalled
by a war ning can disappear from the system's
detection range and will not continue to be
signalled .
If the distance to an obstacle remains the
same, the vo lume of the distance warning is
gradually reduced after about 4 seconds (this
does not apply in the continous tone range).
ll-