2018 AUDI A4 lane assist

a co .... N ,....
N .... 0 0
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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

Ass is tan ce sys tems
your steering whee l ang le as long as you are ac­
tively steering. Evasive steering support is availa­
b le at speeds between approximately 20 mph
(30 km/h) and 90 mph (150 km/h).
Tu rn assist
When start ing to drive and up to speeds of maxi­
mum
6 mph (10 km/h), the turn assist uses a
braking intervention to prevent your vehicle from
colliding with an oncoming vehicle when turning
left or right (available in certain countries). The
braking intervent ion causes your vehicle to stay
in its lane.
A WARNING
-Pre sense front cannot overcome the laws of
physics.
It is a system des igned to assist and
it cannot prevent a collision in every circum­
stance. The driver must always i ntervene.
T he driver is always responsib le 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 .
- Please note that the sensors and the camera
do not always detect all objects or lane
markings. This increases the risk of an acci­
dent.
- Pre sense front does not react to people, an­
imals or ob jects that are crossing the veh i­
cle's path or that are difficu lt to
detect¢ .&.
in General information on page 109.
-Reflective objects such as guard rails or the
entrance to a tunnel, heavy rain and ice can
affect the fu nction of the radar sensors and
the system's ability to detect a coll is ion risk .
(D Note
The sensors can be displaced by impacts or
damage to the bumper, whee l housing and
underbody. Pre sense front can be impa ired
by this. Have an authorized Aud i dealer or au­
thorized Audi Service Fac ility check their func­
tion.
l ) Th is is not availab le in some countr ies.
122
(D Tips
- You can cancel the braking with increas ing
force that is initiated by the system by bra k­
ing yourself, by acce lerating not iceably or
by swerving.
- Keep in mind that pre sense front can brake
unexpectedly. Always secure any cargo or
objects that you are transporting to reduce
the risk of damage or injury.
- Specific pre sense front functions switch off
when the ESC is restricted or sw itched off
¢ page 147 or the hill ho ld assist" is
switched on
¢ page 148 .
Audi pre sense rear
Description
Applies to : vehicles wi th Aud i s ide ass ist
If the risk of a co llision with a vehicle ahead is de­
tected, the follow ing funct ions can be triggered:
- Reversible tensioning of the front safety belts
at the corresponding speeds .
- Closing the windows
and sunroof*.
- Infla ting the side bo ls ters* on the seat back-
rest.
- Ac tivat ing the emergency flashers with in -
creased frequency
l l.
The message Audi pr e sense. ¢ page 121,
fig. 122
will warn you about the danger.
Audi drive select": the function is not active de­
pending on the mode selected.
A WARNING
- To reduce the r isk of an accident, please
no te t hat the s ide assist* radar sensors do
no t always dete ct every object.
-
- Pre sense rear does not react to people, ani­
mals or objects that a re c ross ing the vehi­
cle 's path o r that are d ifficult to detec t.
- Ref lective objects such as gua rd ra ils, heavy
rain and i ce can impair the func tion of the
radar sensors an d the abili ty to detect a col­
lision risk.

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(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 Facility check their func­
tion .
(D 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.
Audi pre sense city
Description
Applies to: vehicles with 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 speeds of approximately 6 mph (10 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 poss ible at speeds
up to 50 mph (85 km/h).
Warnings
Applies to: vehicles with Audi pre sense city
The system recognizes various dangerous s itua­
tions. The
early warning occurs if:
- a vehicle driving ahead brakes suddenly,
- your own vehicle approaches a significantly
slower vehicle or stationary veh icle in the direc­
t ion of travel.
- a pedestrian is standing in the lane or is moving
i nto the lane .
When this warning occurs, it may only be possi­ ble to avoid a collision by swerving or braking
strongly. The message
Audi pre sense .
Assistance systems
¢page 121, fig. 122 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 imp ending colli­
sion . If you do not react to the acute warning, pre
sense city can brake to the point of complete de­
celeration within the limits of the system . T his
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* .
- Inflating the side bolsters* on the seat back-
rest.
Audi drive select*: the function is not act ive 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 coll is ion 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 dep loy 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 anima ls,
crossing or oncoming vehicles, objects such
as bars, railings or railcars, and objects that
are difficult to
detect ¢ A in General infor­
mation on page 109 .
-In trailer mode, the braking behavior of the
tra iler can be d ifferent than usual during au­
tomatic braking.
A WARNING
-Pre sense city may be restricted or not availa-
ble in the following example situations:
- in heavy fog, ra in, spray or snow
~
123

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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