2017 AUDI A4 sensor

Assist
Audi pre sense rear
Description
App lies to: ve hicles w ith Audi side assist
If the risk of a collision is detected, the following
functions can trigger:
- Reversible tensioning of the front safety belts
at the corresponding speeds .
- Closing the windows and sunroof*.
- Inflating the side bolsters* in the seat backrest
and seat surface.
- Switching on the emergency flashers with in-
creased frequency
l ).
The message Audi pre sense. ~ page 108,
fig. 104 will warn you about the danger.
Aud i drive select*: the function is not active de­
pending on the mode selected.
A WARNING
- To reduce the risk of an accident, please
note that the side assist* radar sensors do
not always detect every object.
- Pre sense rear does not react to people, ani­
mals or objects that are crossing the vehi­
cle's path or that are difficult to detect.
- Reflective objects such as guard rails, heavy
rain and ice can impair the function of the
radar sensors and the ability to detect a col­
lision risk .
(D Note
The radar sensors can be displaced by impacts
or damage to the bumper, wheel housing and
underbody. Pre sense rear can be impaired by
this . Have an authorized Audi dealer or au­
thorized Audi Service Facil ity check their func­
tion.
(0 Tips
- The pre sense rear functions switch off
when towing a trailer.
- The pre sense rear functions may also
switch off if there is a malfunction in the
side assist* system.
1> This is not ava ilab le in some co untri es.
110
Audi pre sense city
' Description
App lies to : vehicles wit h Audi pre sense city
Within the limits of the system, pre sense city
can warn you of impending collisions with
vehicles and pedestrians and initiate the applica­
ble braking maneuver if needed. Pre sense city is
active at a speed of 6 mph (9 km/h) and higher.
A pedestrian warning can occur at speeds up to 50 mph (85 km/h), and vehicle warnings can oc­
cur at speeds up to 155 mph (250 km/h). A pre
sense city braking maneuver is possible at speeds
up to 50 mph (85 km/h).
Warnings
App lies to: vehicles wit h Aud i pre sense city
The system recognizes various dangerous situa­
tions. The
early warning occurs when:
- a vehicle driving ahead brakes sudden ly,
- your own vehicle approaches a sign ificantly
slower vehicle or stationary vehicle in the direc­
tion of travel.
- a pedestrian is standing in the lane or is moving
into the lane.
When this warning occurs, it may only be possi­
ble to avo id a collision by swerving or braking
strongly. The message
Audi pre sense.
~ page 108, fig. 104 and a warning tone will
warn you about the danger.
Additionally, a jerk on the brakes may occur as an
acute warning when there is an impend ing colli­
sion . If you do not react to the acute warning, pre
sense city can brake to the point of complete de­
ce leration within the limits of the system. This
reduces the vehicle speed in the event of a colli­
sion. The message
Audi pre sense. also ap­
pears.
The following functions are triggered in conjunc­
tion with pre sense basic/rear:
- Reversible tensioning of the front safety belts .
- Closing the windows and sunroof*. ..,

<( a, .... N ,....
N .... 0 0
3 a,
-Inflating the side bolsters* in the seat backrest
and s eat surfac e.
Aud i drive select*: the function is not active de ­
pending on the mode selected.
A WARNING -,..___
-Pre sense city cannot overcome the laws of
physics. It is a system designed to assist and
it cannot prevent a collision in every circum­
stance. The driver must always intervene.
The driver is always responsible for braking at the correct time . Do not let the increased
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.
- To reduce the risk of an accident, please
note that the camera does not always detect
every object .
- Pre sense city does not react to animals,
crossing or oncoming vehicles, objects such
as bars, railings or railcars, and objects that
are difficult to detect~&.
in General infor­
mation on page 97.
A WARNING
Pre sense city may be restricted or not availa­
ble in the following example situations:
- in heavy fog, rain, spray or snow.
- when there are visual obstructions, such as
glare, reflections or var iations in light.
- when it is dark .
- if the camera window or the windshield is
dirty, iced over, damaged or covered .
- when driving on snow, ice or loose ground .
- on sharp curves.
- if the ESC was restricted or switched off .
- when towing a trailer.
- when the driver's seat belt is unfastened.
- up to ten seconds after sw itching on the ig-
nition.
1 ) Thi s is no t avail able in some c oun tries.
Assist
(D Note
Impacts or damage to the camera mount on
the windshield can displace the sensor . Pre
sense city can be impaired by this. Have an au­
thorized Audi dealer or authorized Audi Serv­
ice Facility check their function .
(i) Tips
-You can cancel the system braking interven­
tion if you accelerate considerably or swerve
away .
- Keep in mind that pre sense city can brake
unexpectedly. Always secure any cargo or
objects that you are transporting to reduce
the risk of damage or injury.
- When there is a malfunction in the camera,
the pre sense city functions also switch off.
Settings in the
Infotainment system
Applies to: vehicles with Aud i pre sense
.,. Select in the Infotainment system: I MEN U! but­
ton
> Vehicle > left control button > Driver as­
s ist > Audi pre sense.
Audi pre sense-
switch On/Off. You can switch
the pre sense functions on and off with th is.
If the system is switched off, it switches on again
automatically once the ignition is switched on
again
l ).
Early warning1
) -the early warning can be
switched off or the pre sense city/front warning
point
( Early /Mediu m/La te) can be set .
Driver messages
Applies to: vehicles with Aud i pre sense
fll Audi pre sense currently restricted. Restrict­
ed sensor vision due to surroundings. See own­
er's manual
This message appears if the radar sensor and
camera view is obstructed, for example by leaves,
snow, heavy spray or dirt . If necessary , clean the .,..
111

Assist
sensors and the area around the camera
~ page 97, fig. 90 or~ page 116, fig . 112.
Ill Audi pre sense: malfunction! Please contact
Service
This message appears when the pre sense func­
tion is affected. For examp le, this could be
caused by a faulty sensor. Dr ive to an authorized
Aud i dealer or a utho rized Aud i Serv ice Facility im­
mediately to have the malfunction cor rected.
Ill Audi pre sense: currently restricted. Towing
mode
Pre sense rear and the pre sense city braking in­
tervent ions sw itch off automatically when the
electrical connector in the factory-installed trail­
er hitch is connected. There is no gua rantee the
f unct ions will swi tch off when using a re trofitted
trai ler hitch .
Ill Audi pre sense: currently restricted
This message appears if the ESC is restr icted or
sw itched off, for example.
Ill Audi pre sense: currently restricted. See
owner's manual
This message appears when there is a temporary
fa ilur e in a subsystem, such as the ESC. If this
message appears repeated ly, dr ive to an author­
ized Audi dealer or authorized Audi Se rvice Facili­
ty to have the malfunction corrected .
Ii] Audi pre sense: emergency braking system
off
This message appears if the pre sense functions
are switched off through the Infotainment sys­
tem or if th e system is not ready.
Audi active Lane assist
Description
Applies to: veh icles w ith Audi active lane assist
Active lane assist (lane departure warning) de­
tects lane ma rker lines withi n the l imits of the
system using a camera in the windshield. If you
are approaching a detected lane marker line and it appears likely that you will leave the lane, the
system will warn you w ith corrective stee ring .
You can override this steering at any time . If you
112
pass over a line, the steering wheel will vibrate
lightly. In order for this warning vibration to oc­
cur, it must first be switched on in the Infotain­
ment system. Active lane ass ist is ready for oper­
a tion when the lane marker line is detected on at
least one side of the vehicle .
T he system is des igned for driving on express­
ways and highways and therefore on ly activates
a t speeds above approximately 40 mph (65 km/
h) .
Applies to vehicles with s ide ass ist*: if you acti­
vate a turn signa l when active lane assist is ready
a nd it classifies a lane change as critical bec ause
of veh icles traveling a longside you or approach ­
i ng you, there will be noticeable corrective steer­
i ng shortly before you leave the lane. This will at­
tempt to keep your vehicle in the lane.
Applies to vehicles without side assist* : the sys ­
tem does not warn when it is ready if you act ivate
the turn signal before crossing the lane marker
lin e. In this case, it assumes that you are chang­
in g lanes intent ionally.
Applies to vehicles with adaptive cruise contro l*:
there is no corrective steer ing or warnings if the
system recognizes a distinct passing maneuver.
If the conditions are met, congestion assist
switches on at speeds under approximately
40 mph (65 km/h)
¢page 104.
_& WARNING
-The system warns the driver that the vehicle
is leaving the lane using correct ive steering.
The driver is always responsible for keeping
the vehicle within the lane.
- The system can help you keep the vehicle in
the lane, but it does not drive by itself. Al­
ways keep your hands on the steering
wheel.
- Corrective steering may not occur in certain
situations, such as during heavy braking .
- There may be cases where the camera does
not recognize all lane marker lines. Correc­
tive steering can only take place on the side
of the vehicle where lane marker lines are
detected.

-Th e system has been unable to detect the lanes
for an extended period of time due to road con­
ditions . Sw itch act ive lane assist back on when
the lines are more visible .
rm Audi active lane assist: currently unavaila­
ble. See owner's manual
There is a temporary active lane assist malfunc­
tion . Try sw itching the active lane assist on again
later .
• Audi active lane assist: malfunction! See
owner's manual
Drive to an authorized Aud i dealer or authorized
Audi Service Facility immediately to have the
malfunction corrected.
rm Audi active lane assist: Please take over
steering!
This message appears if you are not steering by
yourself. Active lane assist is activated, but is not ready to give warning
Adjusting the steering time and vibration
warning
Applies to: vehicles with Audi active lane assist
You can adjust individual active lane assist set­
tings in the Infotainment system .
... Select in the Infotainment system: !MENUI but­
ton
>Ve hicle > left control button > Driver as­
sist
> Audi active lane assist .
Steering time Early:
in this setting, the correct ive steering hap ­
pens continuously to help keep the vehicle in the
center of the lane.
Late: in this setting, the system provides correc­
tive steering just before a vehicle whee l goes over
a detected lane marker line.
Vibration warning
You can switch the additional vibration warning
in the steering wheel on or
off.
A WARNING
-
With the vibration warning switched off,
there will also be no visual warning in the in-
Assist
strument cluster disp lay when crossing a lane
marker line.
(D Tips
In certain countries: your settings are stored
automatica lly and assigned to the remote
control key in use.
Audi side assist
Description
Applies to: vehicles with Audi side assist
Fig. 109 Sensor detection range
Fig. 110 Disp lay on th e exterio r m irror
Side assist (lane change assist) helps you mon itor
your blind spot and traffic behind your vehicle .
Within its lim its, the system warns you about
vehicles that are coming closer or that are travel­
ing within your sensor range
(D <=?fig. 109. If a
lane change is classified as critical, the display@
turns on in the exterio r mirror
<=? fig. 110 .
The display in the left exterior mirror p rovides as ­
s istanc e when making a lane change to the left,
wh ile th e display in the rig ht exterior m irro r pro­
vides ass istance when making a lane change to
the right. ..,.
115

<( a, .... N ..... N .... 0 0
3 a,
are indicated, at the latest, by the time they en­
ter your "blind spot".
© Vehicles you are passing
If you slowly pass a vehicle that side assist has
detected (the difference in speed between the
veh icle and your vehicle is less than approximate­
ly 9 mph (15 km/h)), the display in the exterior
mirror turns on as soon as the vehicle enters your
blind spot.
The display will not turn on if you quickly pass a
vehicle that side assist has detected (the differ­
ence in speed is greater than approximately 9 mph (15 km/h)).
Functional limitations
The radar sensors are designed to detect the left
and right adjacent lanes when the road lanes are
the normal width. In some situations, the display
in the exterior mirror may turn on even though
there is no vehicle located in the area that is criti­
cal for a lane change. 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 a vehicle in another
lane that is
not adjacent to your current lane.
- If you are driving through a curve. Side assist
may react to a vehicle that is in the same lane
or one lane over from the adjacent lane.
- If side assist reacts to other objects (such as
roadside structures like guard rails).
- In poor weather conditions . The side assist
functions are limited.
Do not cover the radar sensors ¢
fig. 112 with
stickers, deposits, bicycle racks or other objects,
because this will impair their function. Do not
use side assist when towing a trailer. For infor­
mation on cleaning, refer to¢
page 33 7.
A WARNING
- Always pay attention to traffic and to the
area around your vehicle. Side assist cannot
replace a driver's attention. The driver alone
is a lways responsible for lane changes and
similar driving maneuvers.
Assist
-In some 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 m ist.
- 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 adversely affect the sys­
tem. Have an authorized Audi dealer or au­
thorized Audi Service Facility check their func­
tion.
(D Tips
If the window glass in the driver's door or
front passenger's door has been tinted, the
display in the exterior mirror may be incor­
rect.
Switching on and off
App lies to : vehicles wi th Audi sid e ass ist
The system can be switched on/off in the Info­
tainment system.
If the system is activated, the displays in the ex­
terior m irrors will turn on briefly when the igni­
tion is switched on.
.,. Select in the Infotainment system:
I MENU ! but­
ton
> Vehicle > left control button > Driver as­
sist
> Audi side assist. Off switches the system
off.
(D Tips
When you switch side assist on or off, the exit
warning system activates or deactivates
¢ page 118.
117

_& WARNING
The exit warning system is subject to limita­
tions and cannot warn you before every im­
pending collision:
- If the vehicle is too wide for the parking
space and covered by the neighboring
vehicles.
- Approaching objects or people such as cy­
cl ists o r skateboarders may not be detected
under certain circumstances.
- The system does not react to stationary ob­
jects.
- The view of the radar sensors may be im­
paired by leaves, snow, heavy spray or d irt.
Clean the area in front of the sensors
r:!vpage 116, fig. 112.
(D Note
Also read this information ¢0 in General in­
formation on page 117.
@ Tips
- The ex it warning system is switched on and
off through the side assist¢
page 117.
-The display brightness for the exit warning
system cannot be adjusted.
- The system is not available when towing a
trailer.
Rear cross-traffic assist
A ppl ies to: vehicl es with rear cross-traffic assist
Fig. 115 Example display
Assist
Fig. 116 Infotainment system: rear c ross -tra ffic assist dis­
play
The rear cross-traffic ass ist can warn the driver of
a potential collision with approach ing cross-traf­
fic when driving in reve rse. Within its limits, the
system monitors the areas behind and next to
the vehicle using the radar sensors when leaving
a parking space
r:!vpage 116, fig. 112. Moving ob­
j ects that are approaching, such as cars, are de­
tected
¢ fig. 115.
If the system detects critical cross traffic when
backing out of a parking space, it wi ll react as fol­
lows:
- Visual indicator : an indicator appears in the In­
fotainment system disp lay with a red arrow
symbo l. The arrow points in the direction from
which the object is approaching
¢fig. 116.
-Audible warning signal: a continuous tone may
sound as an additional indicator when driving in
reverse.
- Automatic brake activation : a brief activation
of the brakes may also warn you of a potent ial
collision with an approaching object.
Requirements for using the rear cross-traffic
assist :
-The parking aid m ust be switched on
¢page 124.
-Reverse gear m ust be engaged.
- The speed must not be higher than approxi-
mate ly 9 mph (15 km/h).
A WARNING
- The rear cross-traffic assist is an assist sys­
tem and cannot prevent a co llision by itself.
The driver must always intervene. The driver
is always responsible for braking at the cor-
rect time .
~
119

Ass is t
- Please note that the rear cross-traffic assist
may act ivate the brakes unexpectedly. Se­
cure any cargo that you are transporting to
reduce the risk of damage or injury .
- An additional brake act ivat ion may be tr ig­
gered within 20 seconds after an automat ic
brake activation.
- If there is an acoustic warning signa l from
the rear cross-traff ic assist, then the park­
ing system may not warn you of detected
obstacles under certa in circumstances .
- The view of the radar sensors may be im­ paired by leaves, snow, heavy spray or d irt.
Clean the a rea in front of the sensors
~ page 116, fig . 112.
A WARNING
T he rear cross-t raff ic assist is s ubject to lim i­
t at ions and cannot warn you before every im­
pending collision:
- If the vehicle is too w ide fo r the pa rki ng
spa ce and covered by the ne ighbor ing
vehicles.
- People , such as cyclis ts, jogge rs, in line skat­
ers and pedestrians, may not be detected
under certain circ umstances.
- If you are in a par allel par king sp ace.
(D Note
Also read this info rmation ~ CD in General in­
formation on page 117.
(0 Tips
- You can cancel the automatic brake activa ­
tion with increasing braking force if you ap­
ply the bra kes yourself or accele rate cons id­
e rab ly.
- In some s ituations, rea r cross-traffic ass ist
may warn you even if t here is no cross traffi c
i n a critic al are a, for examp le w hen ba cking
i nto a parking space or maneuver ing.
- T he rea r cross -traffic ass ist also switches off
whe n you swi tch off the ESC.
- T he rea r cross traffic assist switches on and
off thro ugh the p arking aid<:?
page 12 4.
- T he system is not ava ilable when towing a
trailer.
120
' Messages
Applies to: vehicles with Audi side assist
A message appea rs in the ins trument cluster dis­
play if the side ass ist sw itches off automat ica lly.
@j Audi side assist: currently unavailable . Sen­
sor vi sion re stricted due to surroundings. See
owner' s manual
@j Audi side ass ist and ex it warning: currently
unav ailable . Sensor vi sion restricted due to sur­
rounding s
The radar sensors ' vision is affected . The area in
front of the sensors must not be covered by bike
racks, stickers, leaves, snow or any other objects .
Clean the area in front of the sensors, if necessa­
r y
<:? page 116, fig . 112.
@j Audi side ass ist: currently unavailable . See
owner's manual
@j Audi side ass ist and exit warning: currently
unavailable. See owne r's manual
Side assist ca nnot be switched on at this time be­
cause ther e is a malfunction (for example, the
battery charge level may be too low).
@j Audi side as sist: malfunction! Plea se contact
Service
@j Audi side assi st and exit warning: malfunc ­
tion! Plea se contact Service
The system cannot guarantee that it will detect
vehicles correct ly and it has sw itched off. The
senso rs have been moved or are fa ulty . Have the
system checked by an authori zed Aud i dea ler o r
a uthorized Aud i Serv ice Facility soon.
@j Audi side assi st: unavailable in towing mode
@j Audi side ass ist and ex it warning: currently
unavailable. Towing mode
Side assist switches off automatically when the electrical connector in the factory-installed trail­
er hitch is connected . There is no guarantee the
system will sw itch off when using a retrofitted
trailer hitch . Do not use side assist and the ex it
warning when tow ing a tra ile r.
Ill Rea r parking aid: obstacl e detection res trict-
ed ..,.

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N .... 0 0
3 a,
The rear cross-traffi c assist is not ava ila ble . E i­
ther the ESC is switched off, or the radar sensors may be covered by a b ike rack, stickers, leaves,
snow or other objects. Switch the ESC on, or
clean the area in front of the sensors if necessary
c> page 116, fig. 112 . If this message cont inues
to be d isplayed, d rive immed iate ly to an au thor­
iz ed A udi dealer o r autho rized Audi Servi ce Fac ili­
ty to have t he malfunc tion repa ired.
Audi drive select
Introduction
Applies to: vehicles with Audi drive select
Drive se lect makes it possible to experience dif­
fe rent types of vehicle settings in one vehicle.
The dr ive r can se lect
Comfort , Auto a nd Dynamic
modes in the I nfota inme nt system to switch be­
tween , fo r exa mple, a sporty and a co mfo rtable
d riving mo de. Settings ca n be ad justed to your
p e rs o nal pr efe ren ces in
Individual m ode. This
makes it poss ible to comb ine settings su ch as a
sporty eng ine setting w ith smooth stee ring.
Descript ion
Applies to: vehicles with Audi drive select
The fo llow ing systems, among other things, are
i nfluenced by drive select:
Engine and automatic transmission
D epending on the mode, the en gine and auto­
mat ic transmission respond more quickly o r in a
mo re balanced ma nner to accelerator pe dal
movements . In the spo rty
Dynamic mode, the
transmission shifts at higher speed ranges.
Steering
The power s teering adapts. Ind irect s teer ing t hat
moves easi ly as in
comfort mode is espec ia lly
suited to long drives on highways . The
dynamic
mode p rovides sporty, d irect steering.
The fo llow ing applies to vehicles wi th dynam ic
steer ing* : the stee ring rat io chan ges base d on
ve hicle speed in or der to ma inta in optim um
steer ing effort for the drive r at all times. This
sets the steer ing to be less sensitive at higher
speeds i n order to prov ide improved vehicle con-
Assist
t ro l. At r educed spee ds, steeri ng is more direct in
o rder to kee p the steering effort as minima l as
poss ib le when the drive r is maneuvering t he vehi­
cle. Dynam ic steer ing* also p rovides more re­
spons ive steering performance at low and aver­
age speeds .
Suspension control*
The ada ptive dampers * use sensors to reco rd in ­
f ormat ion regard ing steering movements, b rak ­
ing and accele ration operations by the dr iver,
road s urface, driving speed, and load. This makes
it possible to adapt damping to the d riv in g situa­
t io n virtu ally in rea l ti me . Wi th drive select, you
can ad just th e adap tiv e dam pers to sporty
(Dy ­
nami c),
comfo rtable (Comfort ) or balan ced (Au­
to ).
Cornering light*
T he co rne ring light adapts the high beams to the
direction of the curve de pending on the speed .
T he pivo ting ac tion and the lighting also a dapt to
t h e mode.
Adaptive cruise cont rol (ACC)*
The behavio r whe n accelerati ng ca n be adjusted
from comfortable to s porty, depending on the
dr ive selec t mode . Adap tive cruise control also
r espon ds to the dr iv ing behav ior of t he vehicle
ahea d in a m ore conse rv a tive or sporty m an ner.
Engine sound*
The eng ine sound adapts to the c urrent mode
and can be subtle to sporty .
(D Tips
The S selector leve r posit ion automatically en­
gages whe n the
Dynamic mode is select ed.
121