2018 AUDI A4 lights

fast acceleration) and have the malfunction cor­rected. See an authorized Audi dealer or
authorized Audi Service Facility .
The electronic speed limiter may be faulty if the
indicator light turns on. For additional informa­
tion, see
¢ page 102, Electronic speed limiter .
The MIL indicator light may also turn on if the
fuel filler cap is not closed correctly
¢page 317.
On-Board Diagnostics
Fig. 22 Location of Data Li nk Con nec tor (DLC )
On-Board Diagnostics monitors the components
of your em ission control system. Each monitored
component in your eng ine system has been as­
signed a code. In case of a ma lfunction, the com­
ponent will be identified and the fault stored as a
code in the control module memory.
The MI L light may also illuminate if there is a
leak in the on -board fuel vapor recovery system.
If the light illuminates after a refueling, stop the
vehicle and make sure the fuel filler cap is prop­ erly closed (only vehicles with gasoline engine)
¢ page 317 .
In order to make an accurate diagnosis, the stor­
ed data can only be displayed using special diag­ nostic equipment (generic scan tool for OBD) .
In order to connect the specia l diagnostic equip­
ment, push the plug into the Data Link Connector
(DLC). The DLC is located to the right of the hood
release¢ fig. 22.
a Your authorized Audi dealer or qualif ied work-al
;:::: shop can interpret the code and perform the nee-
" ~ essary repair . 0 0
~ al
Cockpit overview
A WARNING
--
Do not use the diagnostic connector for per­
sonal use. Incorrect usage can cause malfunc­
tions, which can increase the risk of a colli­
sion!
Indicator lights
Description
The indicator lights in the instrument cluster
blink or turn on. They indicate functions or mal­
functions.
Messages may appear with some indicator lights.
A warn ing s ignal will sound at the same time.
The indicator lights and messages in the instru­
ment cluster display can be covered by other dis­
plays. To show them again, select the second tab
with the mult ifunct ion steer ing
wheel ¢ page 13.
If there are several malfunctions, you can display
them one at a time using the thumbwheel.
Some indicator lights in the display can display in
several co lors.
it Central indicator light
If the. or d indicator light turns on, check
the message in the instr ument cluster.
Overview
Some indicator lights turn on briefly as a function
check when you sw itch the ignition on. These sys ­
tems are marked with
a./ in the fo llowing tab les.
If one of these indicator lights does not turn on,
there is a malfunction in that system.
Your vehicle has either a monochrome display or
a multicolored display, depending on vehicle
equipment. Some indicator lights appear white
on a monochrome display .
The. or Q central
indicator light turns on at the same time to indi-
cate the priority of these indicator lights.
..,.
25

Cockpit over view
Red indicator ligh ts
26
--------------
Central indicator light
¢page 25,
Aud i pre sense*
¢ page 120
USA model s:
Brake system ./
¢page28
Cana da m od els:
Brake system ./
¢ page28
USA models :
Electromechan ical parking brake
¢ page29
Canada models:
Electromechan ica l parking brake
¢page29
Cooling system
¢ page30
Engine oil pressure
¢ page 31
E ngine oil level
¢ page 31
Alter nator
¢ page30
Safety belt
¢page30
Electromechan ica l steering ./
¢page 150
Steering lock
¢ page 31
Engine start system
¢ page 31
Transmiss ion (automatic t ransm is ­
sion)
¢ page 96,
Clutch (manual transmission)
¢page32
Hood
¢ page32
Adapt ive cr uise control*./
¢ page 110
Traffic jam assist*
¢ page 116 Ad B
lue*
¢ page 319
Ad Bl ue*
¢ pag e 319
Yellow indi cator lights
--------------
Central indicator light
¢ page25
Electronic Stabi lization Control
( E SC)
¢ page32
Elec tronic Stab il izat io n Contro l
(ESC)
./
¢ page32
Electronic Stab ilizat ion Control
(ESC)
¢ page 147
Brake system
¢ page 33
USA models:
Ant i- lock braking system (ABS)./
¢ page32
Canad a model s:
Ant i-lock b raking system (ABS) ./
¢ page32
Safety systems ./
¢page32
USA mode ls:
Brake pads
¢ page33
Ca nad a model s:
Brake pads
¢ page 33
E lec tromechanical parking brake
¢ page29
Tire p ressure
¢ page352
Tire pressure
¢page 352
Engine contro l
¢page 33
Engine contro l (diesel engine)
¢ page 33

If the indicator light turns on and this message
appears, there is a malfunction in the brake booster.
I f the ABS indicato r light
[I]) (USA mode ls) I
ti] (Canada mode ls), the ESC indicator light J.ft .
and the brake system indicator light 1111 (USA
models)
I . (Canada mode ls) all turn on and
this message appears, then the ABS, ESC and
braking distribution are malfunctioning
c::> ,&. .
Do not continue driving . See an authorized Audi
dea ler or authorized Aud i Serv ice Facility for as­
sistance
c::> ,&. .
1111 (USA model s) /. (C anada mod els ) Pa rk­
ing brake: malfun ction! Safel y stop vehicle . See
owner 's manu al
- If the indicator ligh t and the message appea r
when the vehicl e is stationar y or afte r switch­
ing the ignit ion on ,
check if you can release the
park ing brake. If you cannot re lease the park­
ing brake, see an authorized Aud i dealer or au­
thorized Aud i Serv ice Facility. If you can release
the parking brake and the message still ap­
pears, see an authorized Aud i deale r or author­
ized Audi Service Facility immediately to have
the malfunction correc ted.
- If the indicator light and message appea r
whil e
dri ving ,
the hill start assist or emergency brak­
ing function may be malfunctioning. It may not
be poss ible to set the pa rking brake or release
i t once it has bee n se t. Do not park your veh icle
on h ills. See an authorized Audi dealer or au­
thorized Aud i Service Facility for ass istance.
Brake boo ste r: re stricted . You can c ontinue driv ­
in g. Ple ase co ntact Servic e
There is a malfunction in the brake booster. The
brake booster is availab le, but its effectiveness is
reduced. B raking behavio r may be diffe rent from
how it normally fu nctions and the b rake peda l
may v ibrate.
Drive to an authorized Aud i dealer or authorized
Aud i Service Faci lity immediately to have the
a malfunct ion corrected. co .... N ,....
N .... 0 0
3 co
Coc kpit o ve rv iew
A WARNING
-Read and follow the warnings in
c::> page 323, Working in the engine com­
partment before opening the hood and
checking the brake fluid level.
- If the brake system indicator light does not turn off or it turns on wh ile driving, the
b rake fl uid leve l in the reservo ir is too low,
and this increases the risk of an accident.
S top the vehicle and do not continue d riv­
ing . See an authorized Aud i dealer o r au­
thorized Audi Service Facility for assistance.
- I f the brake system indi cator light turns on
together with the ABS and ESC indicato r
lights, the ABS/ESC regu lating function may
be malfunct ion ing. Funct ions that stabilize
the vehicle are no longer available. This
could cause the vehicle to swerve, which in­
creases the risk that the vehicle will slide. Do not cont inue driving. See an autho rized
Aud i deale r o r autho rized Audi Serv ice Facili­
ty fo r ass is tance.
PARK /(®)/~ Electrom echanical parking
b rake
If the -(U SA mode ls) I. (Canada models)
indicator light turns on, the parking brake was
set.
If the -( U SA mode ls) . (Canada models) in­
dicator light blinks, the braking force is not build ­
ing up enough o r not building up at a ll. Secu re
the vehicle also by selecting the 1st gear (man ual
transm ission) or select ing the P selector lever po­
s ition (automatic transm ission) . Make sure the
indicator light is off before you start driving.
l~j Parking brake : malf unction! Please contact
Ser vic e
There is a ma lfunction in the parking brake. Drive
to an autho rized Audi dealer or authorized Audi
Service Facility immed iate ly to have the malfunc­
t ion corrected.
11 ( USA model s)/ ,1~a (Can ada models) Parking
brake: caution! Vehicle parked too steep
29

a co .... N ,....
N .... 0 0
3 co
c::S Driver's door
II] Driver' s door: malfunction! Shift to P before
l e aving vehi cle. See own er's manual
There is a malfunction in the driver's door. Select
the P se lector lever position (automat ic transmis­
sion) to secure the vehicle.
Drive to an authori zed Aud i dealer or authorized
Aud i Service Facility immediately to have the
malfunct ion corrected .
-: Bulb failure indicator
If the II indica to r li ght turns on, a b ulb has
fa iled. The message ind icates the location of the
bu lb . Rep lace the b ulb immediately .
Vehicle lights: malfunction! Please c ont ac t
Servic e
There is a malfunction in the headlights or the
light switch . Drive to an authorized Audi dealer o r
author ized Audi Se rvice Facility immed iate ly to
h ave the ma lf u nction co rre cted.
_& WARNING
- Ligh t bul bs are under pressu re and can ex­
plode when bulbs are replaced, which in ­
creases the risk of injury.
- Wi th H ID headlights (xenon headlights), the
high -voltage component must be handled
correctly. Otherwise, there is a risk of fata l
injury.
{(D Dynamic headlight range control
II He adlight range cont rol: malfun ctio n! S ee
o w ner 's manual
There is a malfunction in the headlight range
control system, which may ca use glar e for other
drivers.
Drive to an authorized Audi dea ler o r a uthorized
Audi Servic e Facility immediately to have the
malfunct ion corr ected.
-
Coc kpit o ve rv iew
~O Audi adaptive light
Applies to: vehicles with Audi adaptive light
m;J Audi adapt ive light : malfun ction! See own­
er's manual
Adaptive light is not working . The headlights still
funct ion .
Drive to an au thorized Audi dealer or authorized
Audi Service Facility immed iately to have the
malfunction corrected .
@ Light/rain sensor
!;I Automatic headlights: ma lfunction! See
o wner' s manual
!;I Automati c wipers : malfunction ! See owner' s
manual
The light/rain sensor is malfunctioning.
The low beams remain switched on at a ll times
for safety reasons when the light switch is in the
AUTO position. However, you can continue to
turn the lights on and off using the light switch.
You can still contro l all functions that a re inde­
pendent of the rain sensor through the wind ­
shield wiper leve r.
Drive to an au thori zed Audi dealer or authori zed
Audi Service Facility immed iately to have the
malfunction corrected.
Q Suspension control
Applies to : vehicles with suspension control
II Su sp ension: malfunction! You may continue
drivin g
There is a suspension control malfunction .
Drive to an authorized Audi d eal er or authorized
Audi Service Facility immed iate ly to have the
malfunction correc ted.
r : All wheel drive/sport differential
Applies to: vehicles with all wheel drive/sport diffe rentia l
(II All-wh eel dri ve : malfun ction! You may con-
tinue driv ing. Pl ease contact Service
.,.
35

a co .... N ,....
N .... 0 0
3 co
Opening and closing
Central locking
Description
You can lock and unlock the veh icle centrally . You
have the following options:
-Remote control key¢ page 40,
-Sensors in the door handles* ¢ page 40,
-Lock cylinder on the driver's door c::> page 42,
or
-Interior central locking switch c::> page 41.
Turn signals
The turn s ignals flash twice when you unlock the
veh icle and flash once when you lock the veh icle.
If they do not flash, then one of the doors, the
rear lid or the hood is not closed.
Automatic locking (Auto Lock)
The Auto Lock funct ion locks all doors and the
luggage compartment lid once the speed has
ex­
ceeded approximately 9 mph (15 km/h).
The vehicle can be unlocked if the opening func­
tion in the central locking system sw itch is used
or one of the door handles is pulled.
In the event of a crash with airbag deployment,
the doors will a lso automat ically unlock to allow
access to the vehicle.
Selective door unlocking
The doors and luggage compartment lid will lock
when they close . You can set in the Infotainment
system whether
only the driver's door or the en­
tire vehicle should be unlocked when unlocking
c::> page 41.
Unintentionally locking yourself out
Only lock your vehicle when all of the doors and
the luggage compartment lid are closed and the remote control key is not in the vehicle . This
helps to prevent you from locking yourse lf out
accidentally .
The follow ing cond it ions prevent you from lock­
ing your remote control key in the vehicle:
Opening and closing
-If the driver's door is open, the vehicle cannot
be locked by pressing the
fi'.) button on the re­
mote contro l key or by touching the locking
sensor* on a door.
-If the most recently used convenience key* is
detected in the luggage compartment, the lug­
gage compartment lid automatically unlocks
again after closing it.
-If the convenience key* that was last used is de­
tected inside the vehicle, then the vehicle will
not be able to lock from the outside .
_& WARNING
---
-When you lock your vehicle from outs ide,
nobody- espec ially children
-should rema in
inside the vehicle. Remember, when you
loc k the vehicle from the outside the win­
dows cannot be opened from the inside .
- When you leave the vehicle, always take the
ignit ion key with yo u. This will prevent pas­
sengers (children, for examp le) from acci­
dentally being locked in the vehicle should
they accidentally press the power locking
switch in the doors.
- Do not leave children inside the vehicle
un­
supervised. In an emergency it would be im­
possible to open the doors from the outside
without the key.
(D Tips
-Do not leave valuables unattended in the ve­
hicle. A locked vehicle is not a safe!
-The LED in the driver's door rail blinks when
you lock the vehicle. If the LED lights up for
approximately 30 seconds after locking,
there is a malfunction in the central locking
system. Have the problem corrected by an
authorized Audi dealer or authorized Audi
Service Facility.
37

Opening and clo sin g
When the valet parking function is switched on,
the message
V alet pa rking acti vated appears in
the instrument cluster display when you switch
the ignition on.
(D Tips
Please note that the luggage compartment
can still be accessed from the vehicle interior
in vehicles with fixed rear seat backrests or
ones that cannot be locked, even when the
valet parking function is switched on.
Garage door opener (HomeLink)
Description
Applies to: veh icles with garage door opener (Homelink)
Fig. 46 Garag e door ope ner: exa mples o f usage for di ffer­
ent systems
W ith the garage door opener (Homel ink), you
can act ivate systems such as the garage doors,
security systems or house lights from inside your
veh icle. Three buttons are integ ra ted in the head­
line r that can be programmed to up to th ree re­
mote controls.
To be ab le to operate systems using the garage
door opene r, the buttons in the head line r must
first be programmed.
A WARNING
When ope rating o r programming the garage
door opener, make sure that no people or ob ­
jects are in the area immediately surrounding
the equipment. Peop le can be injured or prop­
erty can be damaged if struck when closing.
52
@ Tips
- For security rea.sons, we recommend that
you clear the programmed buttons before
selling the vehicle.
- For additiona l information about Homelink,
visit www.homelink.com.
- For an exp lanation on conformity w ith the
FCC regulations in the Un ited States and the
Industry Canada regulat ions, see
q page386.
Operation
Applies to : vehicles with garage door opener (Homelink)
Requirements : the button in the headliner must
be programmed ¢
page 52 and the vehicle
must be w ithin range of the system, such as the
garage door.
.,. Press the button to open the garage door . The
LED @ Q page 52, fig. 47 blinks or turns on .
.,. Press the button aga in to open the garage
door .
{D Tips
When opening or closing the garage door, do
not press and hold the button longe r ten sec ­
onds or the garage doo r opener w ill swi tch to
programming mode.
Programming buttons
Applies to: vehicles with garage door opener (Home link)
I 111 111
Fig. 47 Headline r: cont rols
N (0 0 0
1 m
You can prog ram bo th fixed code and rolling code
systems using this procedure .
..,.

Lights and Vision
Lights and Vision
Exterior lighting
Switching the lights on and off
--- --------...... ~
I
Fig. 48 Instrument panel: light sw itch w ith buttons
Light switch ·ti :
Turn the light switch to the corresponding posi­
tion when the ignition is switched on.
;oo: and the
selected pos ition turn on (except pos ition 0).
0 -The daytime r unning lights a utomat ica lly turn
on . In veh icles for certain markets, you can
switch the automatic daytime runn ing lights on
and off in the Infotai nment* system.
AUTO -T he head lights automatically adapt to the
surrounding brightness.
:oo: -Parking lights
io -Low beam headlights
Buttons
When you turn the light sw itch to the AUTO or
low beam headlight position
io, you can activate
the following functions:
jo -All weather lights. The headlights automati­
cally adjust so that there will be less glare, for
examp le when th e road surface is wet.
0$ -Rear fog lights
Automatic headlight range control system
Your veh icle is equipped wi th a n automatic head­
light r ange control system th at red uces glare fo r
oncoming tra ffic if the vehicle load changes. The
headlight range ad justs automatica lly.
54
Audi adaptive light
App lies to: vehicles wi th adaptive light
Adap tive ligh t provides be tter visibility when it i s
dark by adapting the ligh ts to the road conditions
based on speed, such as on expressways, r ura l
roads, at intersections, and in curves. The adap ­
tive light only functions when the light switch is
i n the AUTO position.
A WARNING
-Automatic headlig hts* are on ly intended to
assist the driver. They do not relieve the
driver of responsib il ity to check the head­
lights and to t urn them on manua lly ba sed
on t he curre nt ligh t and v is ibility conditions.
F or examp le, fog cannot be detec ted by the
light sensors. So always switch on the low
beams under these weather condit ions and
when dr iv ing in the dark
fD .
- The rear fog lights shou ld only be turned on
in accordance w ith traffic regulations, to
prevent glare for traffic behind your vehicle.
- Always observe legal regulat ions when us­
ing the lighting systems desc ribe d.
{l) Tips
- Th e light sensor for the a utomat ic he ad ­
lights * is in the rearview mir ror mount. Do
not p lace any stickers in this area on the
w indshield.
- A warning tone will sound if yo u ope n the
door when the exte rior lights a re switched
on.
- On ly the front headlights turn on when t he
daytime running lights are switched on* . In
vehicles in certain markets, t he tail lights
w ill also t urn on.
- In cool or damp weather, the inside of the
head lights, t urn signa ls and ta il lig hts can
fog over due to the temperature difference between the inside and outside. They w ill
clear shortly afte r switching them on. This
does not affect the service life of t he light­
mg.

Turn signal and high beam lever
The lever operates the turn signals, the high
beams and the headlight flasher .
Fig. 49 Turn signal and high beam lever
Turn signals ¢¢
N
0 0
> u. C0
The turn signals activate when you move the lev­
e r i nto a turn s ignal position when the ign ition is
switched on.
(D -Right turn signa l
@-Left turn signal
The turn s ignal blinks three times if you just tap
the lever.
High beams and headlight flasher ~D
Move the lever to the corresponding position:
@ -High beams on (vehicles with high beam as­
sistant*) ¢
page 55
©-High beams off or headlight flasher
The
II ind icator light in the instrument cluster
turns on.
A WARNING
H igh beams can cause glare for other drivers,
which increases the risk of an acc ident. For
this reason, only use the h igh beams or the
head light flasher when they will not create
glare for other drivers.
Lights and V ision
High beam assistant
Applies to: vehicles with high beam assistant
The high beam assistant automatically turns the
high beams on or off depending on the surround­
ing conditions .
A camera on the rearview mirror mount can de­
tect light sources from other road users . The high
beams sw itch on or off automatically depending
on the posit io n of vehicles driving ahead and on­
coming vehicles, the vehicle speed and other en­
vironmental and traffic conditions.
Activating high beam assistant
Requirement: the light sw itch must be set to the
AUTO posit ion and the high beam ass istant must
be switched on in the Infota inment system
¢p age 56.
.,. To act ivate the high beam ass istant, tap the
lever forward @¢
page 55, fig . 49 . The lj!a in­
d icator light appears in the instrument cluster
disp lay and the high beams a re switched on/off
automatically. If the high beams were com­
p letely or partially switched on, the
II indica­
to r light turns on.
Switching the high beams on/off manually
If the high beams did not switch on/off automat­
ically as expected, yo u may swi tch them on or off
man ua lly ins tead:
.,. To switch the h igh beams on manua lly, tap the
lever forwa rd @ ¢
page 55, fig. 49. The II in­
dicator light turns on.
.,. To switch the high beams off manually, pull the
lever back©¢
page 55, fig. 49. The high beam
assistant is deactivated .
Operating the headlight flasher
.,. To operate the headlight flasher when the high
beam ass istant is activated and high beams are
sw itched off, pull the lever back ©¢
page 55,
fig. 49.
The high beam assistant remains ac­
tive .
Messages in the instrument cluster display
ml Audi adaptive light: malfun ction! See own-
er's manual
..,.
55