2015 AUDI A4 warning light

2 Table of contents Vehicle literature .. .. .. .. .. ... .
5
About this Owner's Manual . . . 6
Controls and equipment .. ... .
Ins truments and controls .. . .
General illus tration .... ... .. .. ... .
Instruments and warning /
indicator lights ........ .. .. .. . .
Ins truments . .. .. ..... ... .. .. ... .
War ning/ indi cator lights ... .. ... .. .
Driver information d isplay .. . .
Introduct ion . .. .. ..... ... .. .. ... .
Trip computer .. .. ..... ... .. .. ... .
Gearshift Indicator ........ .. .. ... .
Efficiency program ........ .. .. .. . .
Service interval d isp lay .. .. .. .. .. . .
On -Board Diagnostic system (OBD) .. .
Opening and closing .... .. .. . .
Power locking system .. ... .. .. .. . .
R ear lid .. .. ................ ... . .
C hil d safety locks ......... .. .. ... .
P ower wi ndows ........ .. .. .. .. . .
Sun roof .. .. ............. .. .. .. . .
Va let par king .. .. ..... ... .. .. ... .
Garage door opener (HomeL in k) ... . .
Clear vision .. . ...... ... .. .. ... .
Lights ...... .. .. ..... ... .. .. ... .
Inter ior lights .. .. ..... ... .. .. ... .
V1s1on . .. .. .. . .......... .. .. ... .
W iper and washer system ...... .. . .
Dig ita l compass .......... .. .. ... .
Seats and storage ....... .. ... .
General recommendat ions . .. .. ... .
F ront seats ... .. ...... .... ... .. . .
H ead restraints .............. .. . .
Seat memo ry .. .... ...... .. .. .. . .
As htray .... ... .......... .. .. .. . .
C igare tte lig hte r .......... .... ... .
12-vo lt socket . .. ..... ... .. .. ... .
Sto rage .... ... .. ..... ... .. .. ... .
Roof rac k ... .. .. ..... ... .. .. ... . 8
8
8
10
1 0
1 3
23
23
24
26
26
28
29
31
31
38
41
42
43
45
45
4 9
4 9
52
52
55
58
60
60
61
63
64
65
65
66
6 6
69
Luggage compartment . . . . . . . . . . . . 70
Warm and cold ... .. ..... .... . .
Climate co ntrols . ... ... ..... ... .. . 78
78
On the road . . . . . . . . . . . . . . . . . . . 8 2
Stee ring . . . . . . . . . . . . . . . . . . . . . . . . 82
Ign it io n lock . . . . . . . . . . . . . . . . . . . . . 82
Convenience key . . . . . . . . . . . . . . . . . . 85
Driver messages . . . . . . . . . . . . . . . . . . 86
E lectromechanical parking brake . . . . 87
Speed warning system . . . . . . . . . . . . . 89
Cru ise cont ro l . . . . . . . . . . . . . . . . . . . . 91
Transmission . . . . . . . . . . . . . . . . . . 93
Manua l transm ission . . . . . . . . . . . . . . 93
mult it ron ic, S tronic, tiptron ic . . . . . . . 93
Audi adaptive cruise control
and braking guard . . . . . . . . . . . .
101
I n troduc tio n . . . . . . . . . . . . . . . . . . . . . 101
Genera l inform ation . . . . . . . . . . . . . . 1 01
A udi adaptive cruise cont ro l . . . . . . . . 103
Audi braking gua rd . . . . . . . . . . . . . . . 107
Messages . . . . . . . . . . . . . . . . . . . . . . . 109
Audi side assist . . . . . . . . . . . . . . . 111
Lane change assistant . . . . . . . . . . . . . 111
Audi drive select . . . . . . . . . . . . . . 11S
Driving settings . ... ... ..... ... .. . 115
Park assist . . . . . . . . . . . . . . . . . . . . . 118
Pa rking system . . . . . . . . . . . . . . . . . . . 118
Pa rking system (rear) . . . . . . . . . . . . . . 118
Pa rking system (rear, with rear view
camera) . . . . . . . . . . . . . . . . . . . . . . . . 120
Safety first . . . . . . . . . . . . . . . . . . . . 126
Driving Safely . . . . . . . . . . . . . . . . . 126
General notes . . . . . . . . . . . . . . . . . . . . 126
Proper occupant seating positions . . . 127
Pedal a rea . . . . . . . . . . . . . . . . . . . . . . . 131
Stow ing luggag e . . . . . . . . . . . . . . . . . 132
Repo rting Safety Defects. . . . . . . . . . . 134
Safety belts . . . . . . . . . . . . . . . . . . . 136
Genera l notes . . . . . . . . . . . . . . . . . . . . 136
Why sa fe ty belt s? . . . . . . . . . . . . . . . . 13 7

10 Instruments and warning/indicator lights
Instruments and warning/indicator Lights
Instruments
Instrument cluster and controls
The instrument cluster is your central source of information.
Fig. 3 Ove rv iew of the instrument cluster
CD Coolant temperature gauge .. .
@ Tachometer ........... .. .. .
@ Warning/indicator lights .. .. .
© ISETlbutton .... .... .. .... . .
® Display
- Driver information system .. .
- Time and date d isplay .. .. .. .
- Odometer .......... ... .. .
@ Reset button for trip odometer
(z) Speedometer
@ Fuel gauge . .... ..... .. .. .. .
(D Tips
10
11
13
11
23
12
12
12
12
- When switching the ignition on, the nee­
dles in the instrument cluster swing up­
ward briefly.
- The illumination for the instrument clus­
ter lights up whenever you switch on the
i gnition with the
vehicle headlights off .
As the daylight fades, the instrument
cluster illumination likewise dims auto­
matically a nd will go out completely
when the outside light is
very low. This
feature is meant to remind you to switch
on the headlights when outside light
conditions become poor .
Engine coolant temperature gauge
The engine coolant gauge q page 10, fig. 3 CD
only works when the ignition is on. To prevent
damage to your engine, please note the fol ­
lowing important points:
Engine cold
If the needle is at or close to the bottom of
the gauge, the engine has not yet reached its
operating temperature. Avoid high engine
speeds, heavy engine loads, and heavy throt ­
tle app lications.
Normal temperature
When the engine has reached its operating
temperature, the needle will
move to the mid­
dle of the gauge and remain there . If the en­
gine is working hard at high outs ide tempera­
tures, the needle may
move higher on the
gauge. This is not a cause for concern as long
as the . warn ing light in the instrument
cluster display does not illuminate. If the.
warning light in the instrument cluster dis­
play flashes, this can mean one of two things:
either the coolant
temperature is too high, or
the coolant
level is too low¢ page 17 Ill-

M N
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rl I.O
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Instrument s and warning /indicator lights 11
A WARNING
- Always observe the warning in
c::> page 212 , before opening the hood
and checking the engine coolant level.
- Never open the engine hood if you see or
hear steam, or if you see engine coolant
dripping from the engine compartment.
You could burn yourself. Let the engine
cool off first so that you cannot hear or
see any steam or engine coolant .
(D Note
-Mounting additional lights or accessories
in front of the air inlets reduces the cool­
ing effect of the rad iator. At high outside
temperatures or high eng ine load , the
engine could overheat.
- The front spoiler has been designed to
properly distribute the cooling air when
the veh icle is moving .
If the spoiler is
damaged , this cou ld reduce the cooling
effect and the engine co uld then over­
heat. Ask your authorized Aud i dealer for
assistance.
Tachometer (engine rev counter)
The tachometer indicates the engine RPM
(revolutions per minutes).
I f engine RPM drops below 1,500, you should
downshift to the next lower gear . T he red area
at the end of the scale indicates maximum
perm issible engine RPM after the break-in pe­
riod. Before reaching this area, move these­
lector lever to position 0/5 or ease your foot
off the accelerator pedal.
@) Note
The tachometer needle@c::> page 10 ,
fig. 3 shou ld only briefly be in the red
zone: you could damage your engine! The
beg inning of the red zone varies depend-
ing on the engine .
@) For the sake of the environment
Upshifting early saves fuel and reduces en­
gine noise.
~ button
Fig. 4 SET button in th e ins trume nt cluster
The !SET ! button performs the following func­
tions:
Switching on time, date, temperature
display and odometer
The display appears for approximate ly 30 sec­
onds when you press the
I S ET ! button c::> fig . 4
with the ignit ion off .
Starting the Auto-Check sequence
The Auto-Check system constantly monitors
certa in individual functions and components
of the vehicle when the ignition is turned on
and when the vehicle is moving .
With the ignition turned on, you can start the "Auto-Check sequence" by pressing the
! SE T!
button . You can perform an Auto-Check se­
quence when the vehicle is stationary and the
ignition is turned on or when the vehicle is
moving slower than 3 mph (5 km/h).
In addition, the number of keys initialised for
your vehicle is displayed.
L2 3 /3 means that
three keys have been initialised . This feature
enables used car buyers to make sure they
have received all of the keys.
If you are given only two keys, for ins tance ,
you should take the vehicle and the ex isting
keys to an authorized Audi dealer to have the
missing key d isabled .
It is also important to
notify your insurance company about the loss.
Setting the speed warning
By pressing the !SET ! button briefly, you can
set threshold 1 of the speed warning wh ile
you are driving
c::> page 90 . By maintaining II>

12 Instruments and warning/indicator lights
pressure on the ISETI button, you delete the
warning threshold.
Digital clock with date display and
Odometer
Fig. 5 Instrument cluster: odo meter
Fig. 6 In strume nt cl us ter : reset button
Digital clock/GPS controlled clock*
Depending on the vehicle equ ipment level,
you may choose between the quartz clock or
the GPS controlled clock*
l!!j in the radio or in
the MMI*. You can learn more about this in
the MMI manual or in the radio user's manual.
Odometer/trip odometer
The display of distance driven is shown in kilo­
meters "km" or in miles "mi".
- USA mode ls - Miles
- Canada models -Kilometers
The units of measure (kilometers/miles) can
be changed in the radio or MMI*. You can
learn more about this in the MMI manual or in
the radio user's manual.
The odometer @ shows the total number of
kilometers or miles that have been driven on
the vehicle . T
he trip odometer @shows the distance driv­
en since it was last reset. It can be used to
measure short distances. The last d igit shows
distances of 100 meters or 1/10 of a mile.
T he trip odometer can be reset to zero by
pressing the reset button
10.01 r::!;> fig . 6.
Malfunction message
If there is a malfunct ion somewhere in the in­
strument cluster,
DEF will appear in the trip
odometer and w ill stay on. Contact your au­
thorized Audi dea ler to have the problem cor ­
rected.
Immobilizer
When the ignition is switched on, the data on
the ignition key are scanned automat ica lly.
If an unauthor ized key was used, SAFE is dis­
played permanently in the odometer display
field . The vehicle cannot be opera ted
r::!;>p age32 .
(D Tips
- When you switch off the ignition or open
the driver door, the time, date, odome­
ter and temperature are displayed for an
additional
30 seconds .
- Yo u can also call up the display with the
!SET ! button r::!;> page 11 while the igni­
tion is switched off .
Fuel gauge
The fuel gauge works only when the ignition is
on.
When the needle reaches the red area, the
warning light
111 in the instrument cluster
will illuminat e
¢page 21. Time to refuel!
The total tank capacity of your vehicle is listed
in
r::!;> page 281.
(D Note
Never run the tank completely dry! An ir­
regular supply of fuel can cause engine

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0 ::.,: co ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Instrument s and warnin g/indic ator ligh ts 13
misfiring and fuel could enter into the ex ­
haust system . The catalytic converter
could then overheat and be damaged .
Warning/indicator
lights
Description
The indicator lights in the instrument cluster
blink or turn on. They indicate functions or
m alfunctions
c::> .&. .
Messages may appear with some indicator
lights. A warning signal will sound at the
same time . The messages disappear again af­
ter a short t ime. To display a message again,
press the
I S ET I bu tton c::> page 11 . If several
malfunction s occur, each of the indicator/
warn ing lamps will be d isplayed in succession
for about two seconds at a time.
Some ind icators ligh ts in the display can turn
on in several colors.
A WARNING
- Failure to heed warning lights and other
important vehicle info rmation may result
in serious personal injury o r vehicle dam­
age.
- Whenever sta lled or s topped for repa ir,
move the vehicle a safe dis tance off the
road, stop the engine, and turn on the
emergency flasher
c::> page 51.
- T he engine compartment of any motor
vehicle is a poten tially hazardous a rea.
Before you check anything in the engine
compartment, stop the engine and let it
cool down. Always exercise extreme ca u­
t ion when working under the hood
c::> page 212.
Overview
Some ind icator lights turn on briefly to check
the function of that system when you switch
the ignition on . T hese systems are marked
with a./ in t he followi ng tab les. If one of
these ind icator lights does no t turn on, there
is a malfunction in that system.
R ed indicator lights
-------------
U S A models:
Brake system ./
c::> page 15
Canada model s:
Brake system ./
c::>page 15
USA m odel s:
Electromechanical par king b rake
c::> page 16
Canada models :
Electromechanical parking brake
c::> page 16
Safety belts
c::> page 16
Electrome chanical stee ring ./
c::> page 190
Batte ry
c::> page 16
Eng ine oil pressure
c::> page 17
E ngine oil level
c::> page 17
Engine cool ing system
c::> page 17
Steering column lock
c::> page 18
Ignition lock
c::> page 18
USA model s:
Speed warning system
c::> page 89
Canada model s:
Speed warning system
c::> page 89
Adaptive cru ise control./
c::> page 104
Y ellow indic ator light s
-------------
Electro nic Stabilization Control
(ESC) ./
c::> page 18 ..,.

14 Instruments and warning/indicator lights
TPMS
smsoR
Electronic Stabilization Control
( ES C) ./
¢page 18
Electronic Stabilization Control
(ESC)
¢ page 185
USA models:
Anti-lock braking system (ABS)
defective ./
¢ page 19
Canada models:
Anti-lock braking system (ABS)
defective ./
¢ page 19
USA models:
Safety systems ./
¢page20
Canada models:
Safety systems ./
¢ page20
Worn brake pads
¢ page 20
E lectromechanical parking brake
¢ page 16
T ire pressu re monitoring
system ./
¢ page258
Tire pressure monitoring system
¢page258
E lectronic power control./
¢ page20
Malfunction indicator Lamp
(MIL) ./
¢ page 20
Engine speed limitation
¢ page20
Engine oil leve l
¢ page 17
Engine oil sensor
¢page 21
Battery
¢ page 16
Tank system
¢ page 21 Warm
up eng ine*
¢ page208
Windshield washer fl uid leve l
¢page21
Windshield wipers
¢page 21
Remote control key
¢page85
Battery in remote control key
¢page33
Defective light bulb warning
¢ page21
Fog lights
¢page 21
Rear fog light(s)*
¢page21
Headligh t range control*
¢page21
Adaptive light*
¢page22
Light-/rain sensor *
¢ page22
Adaptive dampers*
¢page22
Sport differential*
¢page22
I gnition lock
¢page 22
Steering column lock
¢page 18
Electromechanical steering, dy­
namic steering *./
¢pag e 190
Transmission
- mult itronic, t iptron ic
¢page99
- S tronic
¢ page 99
Transmission
- S tronic
¢ page 99

Instruments and warning/indicator lights 15
Other indicator lights
-------------
Turn signals
¢page 22
USA models: Cru ise control
¢ page 91
Canada models: Cruise control
¢ page 91
Adaptive cruise control*
¢page 104
Adaptive cruise control*
¢page 104
High beam
¢page 50
BRAKE/( ([)) Brake system
The light illuminates when the ignition is
switched on.
It goes out after the eng ine has
been started. This ind icates that the brake
warn ing light is func tioning properly.
If the brake warning light does not light up
when the engine is cranking, there may be a
malfunction in the electrical system. In this
case, contact your authorized Audi dealer.
If the brake system warning/ind icator light
turns on, there is a brake system malfunction.
1111 (USA models) tlll (Canada models)
Stop vehicle and check brake fluid level
If the indicator light turns on and the mes­
sage appears, proceed as follows:
~ Pull off the road.
~ Stop the vehicle .
~ Turnoff the engine.
~ Check the brake fluid level¢ page 221.
~ Contact your nearest authorized repair fa-
c ili ty if necessary .
Warning! Fault in brake system . Contact
dealer
If the ABS indicator light fl1 (USA models)/
ii] (Canada models), the ESC indicator light
G1 and the brake system indicator light
1111 (USA mode ls)/ . (Canada models) turn
on and the message appears, the ABS, ESC
and braking distribution are not working~& .
Carefully drive to your authorized Audi dealer
immediately to have the malfunction correct ­
ed ~& .
1111 (USA models )/. (Canada models)
Parking brake system fault! See owner's
manual
- I f the ind icator light and the message ap­
pear
when stationary or after switching the
ignition on,
check if you can re lease the
parking brake. After releasing the parking
brake, carefully drive to your authorized
Audi dea ler immediately to have the ma l­
function corrected. If you cannot release the
parking brake, seek professional assistance.
- If the indicator light and the message ap­
pear
while driving , the emergency brak ing
function may not be available. It may not be possible to set the parking brake or release
it once it has been set . Seek profess ional as­
sistance .
(USA models): If the warning light
1111 and
the warn ing light
EiJ appear together, imme­
diately contact your authorized Audi dealer or
qualified workshop to have all brake pads in­
spected
~ page 20.
When the light comes on, an aud ible warning
s ignal is also given .
A WARNING
-Always observe the warn ings in
¢
page 212, before opening the hood
and checking the brake flu id.
- Driving with low brake fluid is a safety
hazard. Stop the car and get professiona l
assistance.
- If the
1111 (USA models) tlll (Canada
models) brake system indicator light
turns on together with the ABS and ESC
indicator lights, the ABS/ESC regulating
function may have failed. Functions that
stabilize the vehicle a re no longer avai la-
ble. This could cause the vehicle to .,.

16 Instrum ent s and w arn ing /indic ato r light s
swerve and increase the risk of sliding .
Drive carefully to the nearest authorized
Audi dealer or other qualified workshop and have the malfunction corrected.
- If the brake warning/indicator light does
not go out after a few seconds and the
park ing brake is released, or lights up
wh ile you are driving, the fluid level in
the brake fluid reservoir is too low.
If you
believe that it is safe to do so, proceed
immediately at low speed to the nearest
au thorized Audi dealer or qualified work ­
shop and have the brake system inspect­
ed.
-Always keep in m ind that afte r several
brake applications, yo u will need greater
pressure on the brake peda l to stop your
vehicle. Do not re ly on stra ined brakes to
respond w ith maximum stopp ing power
in critical situations. You must a llow for
increased brak ing dista nces. The extra
distance used up by fad ing brakes could
lead to an acc ident.
:fil.J{®) Electromechanical park ing b rake
The warning/indicator light monitors the
electromechanical parking brake .
If the indicator light. (USA models)/ .
(Canada models) turns on, the park ing brake
was set .
The warning/indicator light will go out when
the park ing brake is released.
• (USA model s) ;a (Canada model s) Cau­
tion: Vehicle pa rked too steep
If the in dica tor light blinks and the message
appears, there is not eno ugh braking power to
keep the vehicle from ro lling . The brakes have
overheated . The vehicle could ro ll away even
on a small incline.
Pre ss brake pedal to rele ase parking br ake
To release the parking bra ke, press t he b ra ke
pedal and press the button<®> or start driving
with s tart ing ass ist at the same time
¢ page 88.
Plea se relea se parking brake
T o re lease the par king brake manually, p ress
t h e b rake pedal and press the button<®> at
the same time. The parking brake on ly re leas­
es automatically if the driver's safety be lt is
fastened.
Ill Parking brak e!
If the Ill ind icator light turns o n and this
message appears, there is a parking b rake
malfu nction . D rive to your author ized Audi
dealer or qualified workshop immediately to
have the malfunct ion corrected.
.ft Safety belts
This warning/indicator light reminds you to
put on your safety belt.
The . war ning/ indicato r light illum inates
whe n the ignition is switched on to remind
t h e d river and (o n USA models on ly) any front
passenge r to p ut on the s afety be lt. Ad dit ion­
ally, an acoustic warning (gong) will also
sound .
Fo r more In format ion ¢
page 136, Safety
belt warning light.
D Battery
T he . warning/indicator light illuminates
when you switch on the ignition and must go
o ut after the engine has started.
• Alternator fault : Battery is not being
charged
If the indicator l ight turns on and the mes­
sage appears, there is a mal funct ion in the
generator or veh icle electrical system .
D rive to your authori zed A udi dealer or quali­
fied wor kshop immed iate ly. Because the ve hi­
cle b attery is discharg ing, turn
off all unnec­
essa ry e lec trical equipmen t such as the rad io.
Seek professiona l assistance if the battery
charge level is too low.
(•) Low battery : Battery will b e charged
while dri ving ..,.