2018 AUDI A4 warning

Assistance systems
-when there are visual obstr uctions, such as
glare, reflections or variations in light
- when it is dark
- if the camera window or the windshie ld is
dirty, iced over, damaged or covered
- when driving on snow, ice or loose ground
- in curves
- if the ESC was restricted or switched off
- when towing a tra iler
- when the driver's seat belt is unfastened
- up to ten seconds after switching on the ig-
nition
(D Note
Impacts or damage to the camera mount on
the windshield can disp lace the sensor . Pre
sense city can be impa ired by this. Have an au­
thorized Audi dealer or authorized Aud i Serv­
ice Facility check the ir funct ion.
{D) 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 transport ing to reduce
the r isk of damage or injury.
- Specific pre sense city funct ions sw itch off
when the ESC is limited or switched
off
¢ page 147 or the hill descent assist* is
switched on
¢page 148.
-When there is a malfunction in the camera,
the pre sense city funct ions also switch off.
Settings in the
Infotainment system
A pp lies to: ve hicles w ith Audi p re se nse
.,. Select in the Infotainment system: IMENU I but­
ton
> Vehicle > left control button > Driver as­
sistance
> Audi pre sense.
Turn on/off Audi pre sense
-the pre sense func­
tions can be turned on and
off.
124
If the system is switched off, it switches on again
automatica lly once the ignition is switched on
again.
Early warning -the early warning can be switch­
ed
off or the pre sense city/front warning point
can be set
( Early /Medium /Late ).
Set the warning time for the early warning to
Early at first . If this causes undesi red early warn­
ings to appear, then set the warning time to
Me­
dium .
The Late warning time should only be set
i n spec ial circumstances, for example, when driv­
i ng with a very dynamic style.
(D Tips
Your settings are automatically stored and as ­
signed to the remote control key being used.
Messages
Applies to: vehicles wi th Audi pre sense
II Audi pre sense: malfunction! Please contact
Service
This message appears when the pre sense func­
tion is affected . For example, th is could be
ca used by a faulty sensor. Drive to an authorized
Audi dealer or authorized Audi Service Facility im­ mediately to have the malfunction corrected.
II 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
sensors and the area around the camera
¢ page 109, fig . 108 or ¢page 129, fig. 130 .
II Audi pre sense: currently restricted. Towing
mode
For vehicles wi th a trailer hitch installed at the
factory, the pre sense rear functions switch
off
when the electrical connector at the socket is
plugged in. There is no guarantee the functions
will switch
off when using a retrofitted trailer
hitch.
II Audi pre sense: currently restricted

a co .... N ,....
N .... 0 0
3 co
This message appears if the ESC is restricted or
switched off, for examp le .
Ill Aud i pre sen se : curren tly re stri cted . See
o wner 's manu al
This message appears when there is a temporary
fa ilu re in a subsystem, such as the ESC. If th is
message appea rs repeated ly, dr ive to an a uthor­
ized A udi dealer or authorized Audi Service Fac ili­
ty to have the malfunction corrected.
Ill Aud i pre sen se: e merg enc y braking syste m
off
This message appears if the pre sense functions
are switched off through the Infotainment sys­
tem or if the system is not ready .
Audi active lane assist
Description
Applies to: ve hicles wit h Aud i act ive lane ass ist
Active lane assist (lane departure warning) de­
tects lane marker lines within the limits of the
system using a camera in the windshield . If you
are approach ing a detected lane marker line and
it appears likely that you will leave the lane, the
system w ill wa rn you w it h corre ct ive steer ing .
You can overr ide th is steering at any time . If yo u
pass over a line, the steer ing whee l wi ll vibrate
lightly. In order for this warning vibration to oc ­
cur, it must first be switched on in the Infotain­
ment system. Active lane assist is ready for oper­
ation when the lane marker line is detected on at least one side of the vehicle.
The system is designed for driving on express ­
ways and highways and therefore only activates at speeds above approximately 40 mph (6S km/
h).
Applies to: vehicles with side assist: if you acti­
vate a turn signal when active lane assist is ready
and it classif ies a lane change as critical because
of vehicles traveling alongside you or approach­ ing you, there w ill be not iceable correct ive steer­
i ng shortly before you leave the lane . This will at­
tempt to keep your veh icle in the la ne.
Applies to: vehicles w ithout s ide ass ist : the ready
system does not warn you if you activate a turn
A ss ista nce sys te m s
signal before crossing the lane marker line. In
t h is case, it assumes that you are changing lanes
intentionally .
Applies to: vehicles wi th adap tive c ruise contro l:
there is no corrective steering or warnings if the
system recognizes a distinct passing maneuver .
If the condit ions are met, traffic jam ass ist
switches on at speeds under approximately
40 mph (65 km/h)
qpage 116.
A WARNING
=
- The system warns the driver that the vehicle
is leaving the lane using corrective steering.
The driver is always responsible fo r 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 stee ring
wheel.
- Cor rective stee ring may not occur in certain
situations, such as during heavy b raking.
- There may be cases whe re the camera does
not recognize all lane marker lines. Cor rec­
tive steering can only take place on the s ide
of the vehicle where lane marker lines are
detected.
- Other road structu res or objects could poss i­
b ly be identified unintentionally as lane
marker lines . As a result, corrective steering
may be unexpected or may not occur.
- The camera view can be restricted, for ex­
ample by vehicles driving ahead or by rain,
snow, heavy spray or light shining into the
camera. Th is can result in active lane ass ist
not detecting the lane marker lines or de­
tect ing them incorrectly .
- In certain s ituations where visibility is low,
the vehicle may switch from an "early" to
"late" steering correct ion.
- Under certain condit ions such as ruts in the
road, an inclined roadway or crosswinds, the
correct ive steer ing alo ne may not be enough
to keep the vehicle in the middle of the lane .
- For safety reasons, act ive lane assist must
not be used when there are poor road and/
or weather conditions such as slippery roads, fog, gravel, heavy rain, snow and the
125

Assistance systems
potential for hydroplaning . Using active lane
assist under these conditions may increase
the risk of a crash.
Switching on /off
A pp lies to: vehicl es w ith Audi active lane assist
Fig. 123 Turn signal lever: button for act ive lane ass ist
F ig . 124 Windsh ie ld: camera window for act ive lane ass ist
~ Press the button to switch the system on and
off
¢ fig. 123. The indicator light in the instru­
ment cluster turns on or off.
126
Analog lnstru- Audi virtual Meaning on
ment cluster cockpit/head- the corre- up display* sponding side
Green line(s) Green line(s) Active lane as-
(left/right) (left/r ight) sist is activat-
-J -J ed and ready
to provide
warnings .
-Red line Active lane as-
(left/r ight)
sist warns you
·/ \-before leaving
a lane. In addi-
tion, the steer-
ing whee l vi-
brates lightly.
Yellow line(s) Gray
Li ne(s) Active lane as-
(left/right) (left/r ight) sist is activat-
·/ \-ed, but is not
ready to give
warning
If the system is switched on but is not ready to
provide wa rn ings, one of the following could be
the cause:
-There is no lane marker line .
-The relevant lane marker lines are not detected
(for example, markings in a construction zone
or because they are obstructed by snow, dirt,
wate r or lighting) .
-The vehicle speed is below the activation speed
of approximate ly 40 mph (65 km/h).
- The lane is too narrow or too wide .
- The curve is too narrow.
- The driver 's hands are not on the steering
wheel.
(D Tips
- Make sure the camera window ¢fig. 124 is
not covered by stickers or other objects. For
information on cleaning, see
¢ page 354.
- In certain markets: if the system is switched
on, it will switch on automatically each time
the ignition is switched on.

Display in the instrument cluster
App lies to: ve hicles with Audi active lane assist
Fig. 125 Instrument cluster (multi-color display): ac tive
lane ass ist is sw itched on and ready to provide warnings
Fig. 126 Instrument cl uster (monoc hrome display): active
lane ass ist is switched on
You can open up the Dr ive r assistance display for
the act ive lane assist using the multifunction
steer ing whee l buttons
c::> page 13.
An additional ind icator appears in the head-up
display*.
Multi-Color Display
Refer to¢ fig. 125
Driver assistance Meaning on the corre-
display in the in-sponding side
strument cluster
Green line(s) Active lane assist is acti -
(left or right) vated and ready to pro-
vide warnings.
Red line Active lane assist warns
(left or right) you before leav ing a lane.
In addition, the steering
whee l vibrates lightly.
Gray line(s) Active lane assist is acti-
(left or right)
vated, but is not ready to
give warning
Assistance systems
Monochrome display
Refer to¢ fig. 126
Driver assistance Meaning on the corre-
display in the in-
sponding side
strument cluster
Light gray line(s) Act ive lane assist is acti-
(left o r right) vated and ready to pro-
vide warnings .
Blinking line(s)
Active lane assist warns
(left or right)
you before leaving a lane.
In addition, the steering
wheel vibrates lightly.
Dark gray line(s) Active lane assist is acti-
(left or right) vated, but is not ready to
. . give warning
Messages in the instrument cluster display
If the active lane assist switches off automatical­
ly, the indicator light in the display turns off and
one of the following messages appears:
fl! Audi active lane assist: malfunction! See
owner's manual
Drive to an authorized Audi dealer or authorized
Audi Service Facility immediately to have the
malfunction corrected.
fl! Audi active lane assist: currently unavaila­
ble . Camera view restricted due to surround­
ings. See owner's manual
This message appears if the camera is unable to
detect the lines. This could happen if:
- The camera fie ld of view
c::> page 126, fig. 124 is
dirty or covered in ice. Clean this area on the
windshie ld
¢ page 354.
- The camera field of view is fogged over. Wait
until the fog has cleared before switching the
active lane assist on again.
- The system has been unable to detect the lanes
for an extended period of time due to road con­
ditions. Switch active lane assist back on when
the lines are more visible.
fl! Audi active lane as sist: currently unavaila­
ble. See owner's manual
127

Assistance systems
There is a temporary malfunction that may pre­
vent the active lane assist from switching on. Try
sw itch ing the active lane assist on again later.
rl! Audi active lane assist: Please take over
steering!
This message appears if you are not steering by
yourse lf. Ac tive lane assist is activated, but is not
ready to give wa rning
& WARNING
Note that messages may be delayed or not
displayed on vehicles with accessories mount­
ed on the steering whee l, s uch as a steering
wheel spinner knob. Always keep your hands
on the steer ing wheel.
Adjusting the steering time and vibration
warning
Applies to: veh icles with Audi active lane assist
You con adjust individual active lone assist set­
tings in the Infotainment system .
-
.,. Select in the Infotainment system: IMENUI but­
ton
> Vehicle > left contro l button > Driver as­
sistance > Audi active lane assist .
Steering time
Early :
in this setting, the corrective steer ing 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 wheel goes over a de­
tected lane marker line.
Vibration warning
You can switch the additional vibration warning
in the steering wheel on or off.
WARNING
With the vibration warning switched off,
there will also be no visual warning in the in­
strument cluster display when crossing a lane
marker line.
128
@ Tips
In certain ma rkets: your settings are stored
automat ically and assigned to the remote
control key in use.
Audi side assist
Description
Applies to: vehicles with Audi side assist
Fig. 127 Sensor detection range
Fig . 128 D isplay on the exterior mirror
Side assist (lane change ass ist) helps you mon itor
your blind spot and traffic behind yo ur vehicle.
Within the limits of the system, i t warns you
about veh icles that are coming closer or that are
traveling with you within sensor range
(D
¢ fig. 12 7. If a lane change is classified as criti­
ca l, the display @in the exterior mirror turns on
¢fig. 128.
The display in the left exterior mirror provides as­
sistance when making a lane change to the left,
while the display in the right exterior mirror pro­
vides assistance when making a lane change to
the right.
Information stage
As long as you do not activate the turn signal,
side assist
informs yo u about vehicles that are

detected and classified as crit ical. The display in
the mirror turns on, but is dim .
The display remains dim in the information stage
so that your view toward the front is not distur­
bed.
Warning stage If the d isplay in a mirror blinks brightly when you
activate a turn signal, side assist is
warning you
about detected vehicles that it has classified as
critical. If this happens, check traffic by gla nc ing
in the exterior m irrors and over your shoulder
c::> .&. in General information on page 130 .
Applies to: vehicles with active lane assist : the
d isplay i n the mirror can also blink if you have not
act ivated a turn signal: if you are app roaching a
detected lane marker line and it appears you will
be leaving the lane, side assist will warn you
about detected vehicles that it ha s classified as
critical.
(D Tips
You can ad just the brightness on of the dis ­
play on the rearview mirror
c::;, page 130 .
General information
Applies to: vehicles with Audi side assist
®
®
©
Fig. 129 Drivi ng situat ion s
Assistance systems
0
r AUD I
• •
Fig. 130 Rear of the veh icle: pos it ion of th e se nso rs
S id e assist functions at speeds above approxi­
mately 9 mph (15 km/h).
@ Vehicles that are approaching
In certain cases, a vehicle will be classified as
critical for a lane change even if it is still some ­
what far away . The faster a vehicle approaches,
the sooner the display in the exterior m irror will
turn on.
@ Vehicles traveling with you
Vehicles traveling with you are indicated in the
exter ior mirror if they are classified as cr itical for
a lane change . A ll vehicles detected by side assist
are ind icated by the time they enter your "blind
spot" , at the latest .
© Vehicles you are passing
If you s lowly pass a veh icle that s ide assist has
detected (the difference in speed between the
vehicle and your vehicle is less than approximate­
ly 9 mph ( 15 km/h)) , the disp lay in the exter ior
mirror turns on as soon as the vehicle en ters your
blind spot.
The display w ill 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
T he 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 :
..,.
129

Ass is tan ce sys tems
-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 condit ions . The side assist
funct ions are limited.
Do not cover the radar
sensors ¢ fig. 130 with
stickers, deposits, bicycle wheels or other ob­
jects, because this will impair the function. Do
not use side assist when towing a trailer. For in­
formation on cleaning,
see¢ page 354 .
A WARNING
-Always pay attention to traffic and to the
area around your vehicle. Side assist cannot
replace a dr iver's attention . The driver alone
is a lways responsible for lane changes and
similar d riving maneuvers.
-In some situat ions, the system may not
function or its funct ion may be limited. For
example :
-If vehicles are approach ing or being left
behind very quickly. The display may not
turn on in t ime .
-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 outs ide of the sensor
range .
(D Note
The sensors can be displaced by impacts or
damage to the bumper, whee l housing and
underbody. Th is can impa ir the system. Have
an authorized A udi dealer or authorized Audi
Serv ice Facility check their function .
(i) Tips
-If the window glass in the driver's door or
front passenger's door has been tinted, the
130
-
display in the exterior mirror may be incor­
rect.
-For an exp lanation on conform ity with the
FCC reg ulations in the United States and the
Industry Canada regulations, see
¢ page 386.
Switching on/off
App lies to: vehicles with A udi side ass ist
The system con be switched on/off in the Info­
tainment system .
If the system is activated, the displays in the ex­
terior mirrors wi ll turn on briefly when the igni­
tion is switched on .
.,. Select in the Infotainment system: IMENU! but­
ton
> V ehicl e > left control button > D riv er as·
s is tance
> Audi side a ssist. Off switches the
system off.
(D Tips
When yo u switch side assist on or off, the ex it
warning system activates or deact ivates
¢ page 131.
Setting the display brightness
App lies to: vehicles wit h Aud i side ass ist
The display brightness con be adjusted in the In ­
fotainment system.
.,. Select in the Infotainment system: IMENU ! but­
ton
> Veh icle > left control button > Dri ver as­
s ist ance
> Audi side a ssist.
The disp lay br igh tness adjusts au tomatically to
the brightness of the surroundings, both in the
information and in the warning stage. In very
dark or very bright surround ings, the automatic
adjustment will set the display to the minim um
or max imum level. In such cases, you may notice
no change when adjusting the br ightness, or the
c h ange may only be noticeable once the sur ­
r oundings change .
Adjust the br ightness to a leve l where the display
i n the information stage will not disrupt your
view ahead . If you change the br ightness, the dis-
play in the exterior mirror w ill briefly show the
.,.

brightness level in the information stage. The
brightness of the warning stage is linked to the
brightness in the informat ion stage and is ad just­
ed along with the information stage.
(D Tips
- Side assist is not active whi le you are mak­
i ng the ad justment.
- Your settings are automatically stored and
assigned to the remote control key being
used.
Exit warning
App lies to: ve hicles with exit warning system
Fig . 131 Examp le display
F ig . 132 Door: warning strip
When the vehicle is stationary, the ex it warning
system warns the passengers of a possib le colli­
sion when opening the door. Within the limits of
the system, the system monitors the areas be­ h ind and next to the vehicle using the radar sen­
sors
c.> page 129, fig . 130 . Mov ing objects that
are approach ing from be hind, such as cars, are
detected
c.> fig. 131.
When you open the door, the warning str ip on
the affected door blinks
c.> fig . 132 if another
road user is detected and the s ituation is classi­
fied as critical. The display in the exterior m irror
A ss is ta nce syst ems
on the affected side flashes at the same time. If
the door is already open and another road user is detected and the situation is classified as cr itical,
then the corresponding disp lays turn on.
A WARNING
- Always pay attention to traffic and to the
area around your vehicle. The ex it warn ing
system does not replace the attention of the
passengers. The veh icle passengers are al­
ways responsible for opening the doo rs and
exit ing the veh icle.
- The exit warning system ca n be ava ilable for
up to app roximately three minutes after un­
lo cki ng the veh icle and opening the door as
well as a fter switching off the ignition. Then
the system switches off with a brief flashing
of the displays .
- The exit warning system cannot notify you of every approaching object or person, such
as joggers or pedestrians.
A WARNING
-
The exit warning system is subject to limita-
tions and cannot warn you before every im­
pending collis ion:
- If the veh icle is too wide for the parking
space and covered by the neighboring
veh icles.
- Approaching objects or peop le such as cy­
clists or skateboarders may not be detected
under certain circumstances.
- The system does not react to stat ionary ob­
jects.
- The v iew of the radar sensors may be im­
pa ired by leaves, snow, heavy spray or dirt .
Clean the area in front of the sensors
c.>page 129, fig. 130.
(D Note
Also read the information in c.> (D in General
information on page 130.
@ Tips
- The exit warning system is switched on and
off through the s ide ass ist
c.> page 130.
131