2018 AUDI A4 warning light

a co .... N ,....
N .... 0 0
3 co
reach the perm itted eng ine speed. The adaptive
cr uise control switches off automatically and can­
not be switched back on.
II.I ACC with traffic jam a ssist : currently un­
available. Parking b rake applied
The systems sw itch off if yo u se t the pa rking
bra ke. The systems a re av ailab le aga in after you
release t he p arking bra ke.
llJ ACC w ith traffic jam assist: currently un­
available . Stabilization control (ESC) input
This message appears if the elect ronic stab iliza­
tion co ntro l (ESC) is tak ing action to stab ilize the
ve hicl e. Th e syste ms switch off in th is scenar io.
IIJ ACC w ith traffic jam assist: manual control!
This message appears if the veh icle rolls bac k
when sta rting on a slight incl ine , even though the
systems are active . P ress t he b rake pedal to pre­
ve nt the vehicle from rolling o r sta rt ing to move.
ll'J ACC with traffic jam assist: currently un­
available. Downhill assist activated
You cannot ac tiva te the sys tem w hen hill hold as ·
sist is ac tive.
iii ACC with traffic jam a ssist: manual control!
T his message appea rs if the driver does not take
over steer ing after mu ltip le dr iver intervent io n
reques ts and the system switches off. The vehicle
br akes unt il it is st atio nar y.
l!I Traffic jam assist: unavailable. See own er's
manual
T he system can no longer ensure that the ve hicle
will stay in the lane and switches off. Have yo ur
ve hicle checked by an a uth orized Audi dea ler or
author ized Audi Service Facility if the ma lfu nc­
tion is con tinuous.
l!I Traffic jam assist: Please take over steering!
This message appears as soon as the system
stops d etecting steer ing activity when the system
limits are reached. Always keep yo ur hands on
the steering wheel so you ca n be ready to stee r at
any time .
ifl Traffic jam assist: currently unavailable .
Please fasten seat belt
Assistance systems
T he system switches off when the drive r's safety
belt is unfastened .
fl ACC: efficiency assist not available in this
country
T he ada ptation to speed lim its and routes ahead
i s not available in th is co unt ry .
llJ ACC: predictive control currently unavaila ­
ble. See owner's manual
The adaptation to speed lim its and routes ahead
switches off at speed limits under 20 mph (30 km/h) .
The message can also appear if the adaptation to
speed limits and routes ahead has a temporary
failure. Have your vehicle checked by an autho r­
ized Audi dea ler or author ized Audi Service Facili­
ty if the malfunc tion is con tinuous .
Distance warning: malfunct ion! Please contact
Serv ice
T he system cannot gua rantee that it will detect
vehicl es cor rect ly and it has switched off . T he ra ­
dar sensors have shifted or are fa ulty . D rive to an
authorized Aud i dea le r or aut hori zed Audi Serv ice
Facility immed iate ly to have the malfu nction cor­
r ec ted .
Distance warning: currently unavailable. Sensor
view restricted due to surroundings . See own­
er 's manual
This message appears if the rada r senso r view is
obstructed, for examp le by leaves, snow, heavy
spray or dirt. Clean the sensors
c::, page 109,
fig. 108 .
Distance warning: currently unavailable. See
owner's manual
T his messa ge appears if the system has a tempo ­
rary fail ure. If this occurs mu ltip le t imes, drive to
an a uth o rized Aud i dea le r or a uth orized Audi
Se rvice Facility immed iate ly to have the ma lfunc­
t ion co rrected.
ACC : Please fasten seat belt
T he sy stem is no t complete ly ava ilable if the dr iv­
er's se at bel t is unfas tene d.
Stationary object ahead
.,..
119

Assistance systems
This message appears if you would like to switch
the system on and there is a stationary object di­
rectly in front of your veh icle.
Door open
The system is not ava ilable when the door is
open.
Audi pre sense
Introduction
A pp lies to: ve hicles w ith Audi p re se nse
W ithin the limits of the system, the pre sense
functions can initiate measures in particularly
dangerous situations to protect the veh icle pas­
sengers and other road users .
- Due to the interlinking of various vehicle sys­
tems, crit ical dr iving s ituations can be detected
by
pre sense basic and measures for preventa ­
tive occupant protection are can be initiated .
- The
pre sense front system uses the data from
the adapt ive cruise control* radar sensors and
the camera to calculate the probab ility of a col­
li sion. Withi n the limits of the system, an im­
pending collision with vehicles can be dete cted
in both urban and rural speed ranges. In this
case, the system warns the driver visually,
acoustically and with a jerk on the brakes if nec­
essary. If needed, it can initiate a partial or full
deceleration to reduce the co llision speed or to
avo id the collision under certain c ircumstances .
In conjunct ion with pre sense basic/rear, the
front safety belts are also revers ibly tensioned
when needed . The pre sense front is also active
whe n adapt ive cruise control* is swit ched off.
- Pre sense rear contains pre sense basic func­
tions. It uses the data from the side assist* ra­
dar sensors and calculates within the limits of
the system the probab ility of a rear end coll i­
s ion with the vehicle behind you. Pre sense rear
is also active when side assist* is switched off.
- Within the limits of the system,
pre sense city
uses the camera data and can detect an im ­
pending collision with vehicles and pedestrians.
In this case, the system warns the driver visual ­
ly, acoustically and with a jerk on the brakes if
necessary. If needed, it can initiate a full decel­
eration to reduce the collision speed or to avoid
120
the collision under certa in circumstances . In
conjunction with pre sense basic/rear, the front
safety belts are also reversibly tensioned when
needed .
A WARNING
-
Read the general information inc> & in Gen-
eral information on page 109,
c> & in Gener­
al information on page 130.
(D Tips
- Certain pre sense funct ions sw itch off when
dr iving in reverse.
- The pre sense functions may not be availa­
ble if there is a malfunct ion in the ESC sys­
tem or the a irbag control module.
- Note that the reversible belt tensioner on
the front passenger's side deactivates when
the front passenger's airbag is deactivated .
- Switch the pre sense off when you are not
using public streets or when loading the ve­
hicle onto a vehicle carrier, tra in, sh ip or
other type of transportation. This can pre­
vent an undesired intervention from
the pre
sense system.
Audi pre sense basic
Description
App lies to : vehicles wi th Audi pre sense basic
The pre sense bas ic functions are activated at a
speed of approx imately 20 mph (30 km/h) or
higher .
The following functions can be triggered under certain condit ions w ith in the lim its of the sys­
tem:
- Tensioning of the safety belts (for examp le,
during heavy brak ing): the front safety belts
have reversib le be lt tens ioners. If a collision
does not occur, the safety belts loosen slightly
and are ready to trigger again.
- Closing the windows and sunroof* .
-

-Activating the emergency flashers l).
The message Audi pre sense . ¢ page 121,
fig. 122 will warn you abo ut the danger.
Aud i drive select*: the trigger t imes are adjusted
depending on the mode selected.
Audi pre sense front
Description
Applies to: veh icles with Audi adaptive cruise control
Within the limits of the system, pre sense front
can warn you of impending collisions and initiate
the corresponding braking maneuvers or the sup­ porting measures when avoiding a collision .
If detected in time, the system can rank the dan­
gerous situation as critical if a vehicle driving
ahead brakes suddenly, if your own vehicle is ap­
proaching a significantly slower vehicle at high
speed or when there is an oncoming vehicle dur­
in g a turning maneuver .
If detection is not possible, then pre sense front
does not react .
Warnings
Applies to: ve hicles with Audi adaptive cruise control
Fig. 122 In strument cluste r: approac h warning
General information
The system recognizes various dangerous situa­
tions . The
early warning occurs if:
-a vehicle driving ahead brakes suddenly,
-your own vehicle approaches a significantly
a s lower vehicle or stationary vehicle in the direc-co
;::; tion of travel. ,....
N .... 0 0
3 1) This is not availa ble in some co untrie s. co
Assistance systems
When this warning occurs, it may only be possi­
ble to avoid a collision by swerving or braking
strongly. The message
Audi pre sense.
¢ fig. 122 and a warning tone will warn you
about the danger .
If you do not react enough or not at all to a dan­
gerous situation that was detected by the sys­
tem, pre sense front provides assistance by ap­ plying the brakes .
If a collision is imminent, the system will first
provide an
acute warning by braking sharply. You
will also warned by an indicator in the instrument
cluster
display¢ fig. 122. If you do not react to
the acute warning, pre sense front can brake with i ncreasing fo rce within the limits of the
system
1>. This reduces the vehicle speed in the
event of a collision. At low vehicle speeds, pre
sense front can in itiate a complete deceleration
shortly before a collision with a vehicle driving
ahead
l). If pre sense front determines that you
are not braking strongly enough when a collision
is imminent, it can increase the braking force.
T he following functions trigger in conjunction
with pre sense basic/rear at corresponding vehi ­
cle speeds:
-Reversible tensioning of the front safety belts.
-Closing the windows and sunroof* .
-Inflating the side bolsters* on the seat back-
rest .
Audi drive select*: depending on the mode se­ lected, the reversible belt tensioner, the closing
of the w indows and sunroof*, and the inflating of
the side bolsters* on the seat backrest may not be active.
Evasive steering support
Evasive steering support helps you to steer the
vehicle around an obstacle in a critical situation .
If you avo id an obstacle after the acute warning,
then the evasive steer ing support ass ists you by
applying slight stee ring adjustment to correct
.,.
121

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

Parking systems
Parking systems
General information
A ppl ies to: ve hicles w ith a rea r parking sys te m /pa rking sys ­
tem p lus/rearv iew camera/peripheral ca meras
Depending on your vehicle's equipment , various
parking aids will help you when parking and ma­
neuvering.
The
rear parking system is an audible parking aid
that warns you of obstacles
behind the vehicle
¢ page 137.
The
parking system plus assists you when park ­
ing by audibly and visually indicating objects de­
tected
in front of and behind the veh icle
¢ page 137.
The
rearview camera shows the area behind the
vehicle in the Infotainment system display . The
lines in the rearview camera image help you to
park or
maneuver ¢ page 138. The parking sys­
tem plus functions are also available
¢ page 137.
The
peripheral cameras give various views to
help you when parking or maneuvering
¢ page 140. The parking system plus functions
are also available
¢page 137.
A WARNING ,..__ -
- Always look for traffic and check the area
around your vehicle by looking at it directly
as well. The parking system cannot replace
the driver's attention. The driver is always
responsible when entering or leaving a park­
ing space and during similar maneuvers.
- Please note that some surfaces , such as
clothing, are not detected by the system .
- Sensors and cameras have blind spots in
which people and objects cannot be detect­
ed . Be especially cautious of small children
and animals .
- Always keep your eyes on the vehicle's sur ­
roundings, using the rearview mirror as
well.
- The sensors can be displaced by impacts or
damage to the radiator grille, bumper,
wheel housing and the underbody. The park­ ing system may be impa ired as a result.
136
Have an authorized Audi dealer or author­
ized Audi Service Facility check their func­
tion.
(D Note
- Some objects are not detected or displayed
by the system under certain circumstances:
- objects such as barrier chains, trailer draw
bars, vertical poles or fences
- objects above the sensors such as wall ex ­
tensions
- objects with certain surfaces or structures
such as chain link fences or powder snow
- If you continue driving closer to a low ob­
ject, it may disappear from the sensor
range. Note that you will no longer be
warned about this obstacle.
- Keep enough distance from the curb to re ­
duce the risk of damage to the rims.
{i) Tips
- The system may provide a warning even
though there are no obstacles in the cover ­
age area in some situations, such as:
- certain road surfaces or when there is tall
grass
- external ultrasonic sources such as from
cleaning vehicles
-in heavy rain, snow, or thick vehicle ex­
haust
- We recommend that you practice parking in
a traffic-free location or parking lot to be­
come familiar with the system . When doing
this, there should be good light and weath­
er conditions.
- You can change the volume of the signals
and the display ¢
page 143.
- Please refer to the instructions for towing a
trailer located in
¢page 144.
- What appears in the infotainment display is
somewhat time-delayed.
- Th e sensors must be kept clean and free of
snow and ice for the parking aid to operate .
- Th e rearv iew camera is automatically
cleaned when cleaning the rear window*
¢ page 60 .