2018 AUDI A4 light

Cockpit overv iew
Head-up display
Applies to: vehicles with head-up display
Fig. 21 Instrument panel: knob for the head-up display
The head-up display projects certa in warnings or
selected information from the ass ist systems* or
nav igation* on the w indshield. The d isplay ap­
pears within the drive r's fie ld of vision .
Switching on /off
• To switch the head-up display on or off, press
the
knob~ ~ fig. 21.
Adjust ing th e height
The height of the display can be adjusted to the
individual driver.
• Make sure you are seated correctly
qpage255.
• Turn the knob~ to adjust the display .
Setting s in th e Infotainm ent sy ste m
• Se lect in the Infotainment system: I MENU I but­
ton
> Vehi cle > left contro l button > Dri ver as­
s ist ance
> H ea d-up di spl ay .
D is play content
In the Infotainment system, you can specify
which information should be displayed: For ex­
ample, this can include navigation information*,
adaptive cruise control* or camera-based traffic
sign recognition *.
The display of certa in information and some of
the red indicator lights cannot be hidden in the
Infotainment system.
Brightness
You can adjust the display brightness in the Info­
tainment system. The d isplay brightness decreas -
24
es automatically as the amount of light decreas ­
es . The background brightness is adjusted with
the instrument
illumination ~ page 58.
Picture rotation
You can rotate the picture in the Infotainment
system clockwise or counter clockwise.
(D Note
To p revent sc ratches on the glass covering the
head-up display, do no t place any objec ts in
the pro jection opening .
@ Tips
-Sunglasses with po larization filte rs and un­
favorable light ing cond itions can have a
negative effect on the disp lay .
- An optimum disp lay depends on the seat
posit ion and the height ad justment of the
head -up disp lay.
- A spec ial windshie ld is needed for the head ­
up display funct ion .
- For information on clean ing,
see~ table In­
terior cleaning on page 356.
On-Board Diagnostic
System (OBD)
Malfunction indicator lamp (MIL)
The ma lf u nction indicator lamp (MIL) ¢;# in the
i nstrumen t cluster is part of the On-Board Diag­
nostic System (OBD II).
The indicator light turns on when the ignition is
switched on and turns off once the engine is
star ted and is r unning in idle at a stable speed.
This indicates that the MI L is fu nctioning correct­
l y .
If th e light do es n ot turn off aft er start ing the
e ngin e
or turns on while driving, this may indi­
cate there is a malfunction in the engine .
If the
i ndicator turns on, the cata lytic converter may be
damaged.
Drive
with reduc ed eng in e perf orman ce (avoid
high speeds for extended periods of time and/o r
IJJ,-

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

a co .... N ,....
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'
-Yli-, I '
Malfunct ion Indicato r Lamp (MIL)
,/
¢page 33
Diese l part icu late filter*
¢page33
Eng ine speed limitat ion
¢page34
Eng ine oil level (MIN)
¢ page 31
Eng ine oil level ( MAX)
¢ page 327
Eng ine oi l sensor
¢ page34
Eng ine warm-up request
¢ page34
Battery charge
¢page 30
Tank system
¢page34
Washer fluid level
¢page34
W indshield w ipers
¢page34
Remote control key
¢ page83
Driver's door
¢page35
Battery in remote cont rol key
¢ page39
Bulb failure ind icator
¢ page 35
Headlight range control system
¢ page 35
Adapt ive light*
¢ page35
Light/rain sensor
¢page35
Active lane ass ist*
¢page 126
Audi side assist*
¢ pag e 133
AdBlue0
0
Coc kpit o ve rv iew
Audi pre s ense *
¢page 124
Parking aid*
¢page 144
Transmission (automatic transmis­
s ion)
¢ page 96,
Clutch (manual transmission)
¢page 32
Steering lock
¢ page 31
Engine sta rt system
¢page 31
Electrome chanical steering
¢ page 150
Suspension control*
¢page 35
All wheel drive/sport differential*
¢page35
Emergency call funct ion*
¢ page 203
Ad Blue *
¢page 319
Ad B lue*
¢ page 319
Other indicator light s
--------------
Turn signals
¢ page 36
USA models :
Cruise cont rol sys tem*
¢ page 102
Canad a model s:
Cru ise control system*
¢ page 102
Adaptive c ruise contro l*
¢ page 110
Adaptive c ruise contro l*
¢ page 110
Adaptive c ruise contro l*
¢ page 110
Ad aptive c ruise contro l*
¢ page 110
27

Cockpit over view
28
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y>))
Adapt ive cruise control*
¢ page 112, ¢page 115
Adapt ive cruise control*
¢ page 115
Traffic jam assist*
¢page 116
Active lane assist*
¢page 126
Predictive efficiency assist*
¢page 107
USA model s:
Predictive efficiency assist*
¢page 107
Canada mod els:
P redictive efficiency assist*
¢ page 107
Predictive efficiency assist*
¢page 107
Predictive efficiency assist*
¢page 107
Predictive efficiency assist*
E!)page 107
Hill descent assist*
¢page 148
Start/S top system *
¢page85
Start/Stop system*
¢ page 85
Remote cont rol key
¢ page85
Ad B lue *
¢page319
Automatic transm ission*
¢ page96
Dynamic steering"
¢page 150
Adapt ive cr uise control*
¢ page 112,
Traffic jam assist*
¢ page 118
Traffic jam assist *
¢page 118
D AUTO
Audi pre sense *
¢page 124
USA models:
Electromechanical parking brake
¢ page 29
Canad a models:
Electromechanical parking brake
¢ page29
Hill descent assist*
¢page 148
Child safety lock
¢ page48
USA models:
Speed warning system*
¢ page 102
Canada model s:
Speed warning system*
¢ page 102
Active lane assis t*
¢ page 126
Audi s ide assist*
¢ page 133
Camera-based traff ic sign recog ni­
tion*
High beam ass istant*
¢ page 55
High beams
¢ page 55,
High beam ass istant*
¢ page 55
BRAKE /CCD) Brake system
If this indicato r light turns on, t here is a malf unc­
t ion in the b rake system .
1111 (USA model s) /. (Canada model s)
Brakes : stop vehicle and chec k brake fluid level
Stop the vehicle and check the brake flu id leve l.
See an author ized Audi dealer or authorized Audi
Service Facility for assis tance if necessary .
1111 (USA models ) /. (Can ada model s)
Brakes : malfunction! Stop veh icle safely
..,.

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
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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

Cockpit over view
There is not enough braking force to hold the ve­
hicle in place . The brakes have overheated. The
veh icle cou ld ro ll away even on a small incline .
Ill (U SA mod els)/ lC@j (C an ad a model s) Parking
brake : applied
If th is message appears, press the brake pedal
fi rst a nd the n release the pa rk ing bra ke if neces­
sary.
II ( U SA model s)/ l(@j (Canada mo dels) Parking
brak e: emerg ency braking
The emergency braking function was triggered .
Please rele ase park ing b rake
Release the par king brake if t his message ap ­
pears.
Plea se pr ess brak e pedal to rel ease parking
brak e
To release the park ing brake, press the brake
pedal and press
the ~ button at the same time,
or start driv ing with hill start ass ist
9 page 89,
Starting to drive.
(D Tips
For add it ional information on the park ing
brake, see
9 page 88.
-L Cooling system
• Turn off engin e and che ck co ola nt level. See
o w ner 's manual
The coolant leve l is too low.
Do not cont inue driving and switch the engine
off . Check the coolant level
9 page 329.
- If the coolant level is too low, add coolant
9 page 329. On ly cont inue driving once the in­
dicator light turns off .
• Coolant t emper atu re: too high. Let e ngi ne
run with vehicle st ationar y
Let the eng ine run at id le for a few minutes to
coo l off, until the indicator light turns off .
- If the indicato r ligh t does not turn off, do not
contin ue driving the vehicle. See an au thorized
30
Audi dea ler or authorized Audi Service Facility
for assistance.
A WARNING
- Never open the hood if you can see or hear
steam or coolant escaping from the engine
compartment. This increases the risk of burns. Wait until you no longer see or hear
steam or coolant escaping .
- The engine compartment in any vehicle can
be a dange rous area . Stop the engine and
allow it to cool befo re working in the engine
compa rtment. Always follow the informa­
tion fo und in
9 page 323, Working in the
engine compartment .
(D Note
Do not continue driv ing if the . indicator
li ght turns on as this increases the risk of en­
gine damage.
~ Safety belt
The . indicator light stays on until the dr iver's
and front passenger's safety belts are fastened.
Above a certain speed, there will a lso be a warn­
i ng tone.
(D Tips
For additional informat ion on safety belts,
see
Q page 263.
0 Generator/Vehicle battery
If the . or(•) indicator light turns on, there is a
malfunction in the generator or the vehicle e lec­
trical system .
• Electrical sy stem: malfunction! Saf ely stop
v ehicle
Do not continue dr iving and switch the engine
off. See an authorized Audi dealer or autho rized
Audi Service Facility for assistance.
(•j Ele ctri cal system: m alfunc tion! Re sta rt not
po ssible. Plea se cont act Ser vice
The vehicle battery was disconnected from the
vehicle e lectr ica l system and will no longer

a co .... N ,....
N .... 0 0
3 co
charge. Drive to an authorized Audi dealer or au­
thorized Audi Service Facility immediate ly.
Do not stop the eng ine, or you will not be able to
start it aga in. If yo u can no longer sta rt the en­
gine, see an authorized A udi dealer or authorized
Audi Service Facility for assistance .
(•) Elec trical system : malfunction! Plea se c on­
tact Se rvic e
Drive to an authorized Aud i dea le r or authorized
Aud i Service Faci lity immediately . Because the ve­
h icle battery is discharg ing , turn off all unneces ­
sary e lectr ica l equipment s uch as the radio . See
an authorized Audi dealer or authorized A udi
Service Facility if the battery charge level is too
l ow .
(•) Ele ctrical system : low battery charge . B at­
tery w ill be charg ed while driv ing
The start ing ability may be impaired .
If th is message turns off after a little while, the
vehicle battery charged enough wh ile driving .
If the message does not turn off and stay off
when dr iving, have an authori zed Aud i dea ler or
author ized Audi Service Facility repair the mal­
function.
~ Engine oil pressure
• T u rn off engine . O il pr essure too low
Stop the eng ine and do no t continue driving.
Check the engine oil
level ¢ page 32 7.
-If the engine oil level is too low, add engine oil
¢ page 327. Only cont inue driv ing once the in­
dica tor light turns off.
- If the engine oil level is correct and the indica­
tor light sti ll turns on, turn the engine off and
do not continue driving. See an authori zed Audi
dealer or au thor ized Audi Service Facility for as­
s istance.
@ Tips
The oil pressure warning is not an o il level in­
dicator. Always check the oil level regularly.
Coc kpit o ve rv iew
~ Engine oil level (MIN)
• Plea se add oil imm ediatel y.
Add engine oil immediately ¢ page 327 .
Ill Please add ma x. x qt (l) oil. You can contin ·
ue d riv ing
Add the maximum amount o f oi l indicated in the
display as soon as possible
¢ page 32 7 .
@ -Steering lock
• Steering: m alfunction! Ple ase stop vehicle
T he re is a ma lfunction in the e lectronic steering
l ock. You cannot turn the ignition on.
Do
not tow your vehicle because it cannot be
stee red. See an authorized Audi dea ler or author­
ized Audi Se rvice Facili ty for assistance.
Em Ste ering lo ck : malfunct ion! Pl eas e contact
Ser vic e
There is a malfunction in the electron ic steering
lock.
Drive to an au thori zed Audi dealer or authori zed
Audi Service Facility immed iately to have the
malfunction corrected .
_& WARNING ,-
Do not tow your vehicle when there is a mal-
f u nction in the electro nic steer ing lock· t his
i n cr eases the risk of an a cc ident.
~ Engine start system
• Engine s tart sy stem: malfun ction! Ple ase
cont act S erv ice
Do not switch the ignition off because you may
not be able to switch it on again.
Drive to an authorized Audi dealer or authorized
Audi Se rvice Facility immed iately to have the
malfu nction corrected .
= Engine sta rt system: mal function! Ple ase
cont act S erv ice
-
There is a ma lf u nction in the engine starting sys-
tem.
~
31