2015 AUDI A4 ignition

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Instrument s and warnin g/indic ator ligh ts 19
A WARNING ,~ ~
If the ~ (USA models)/ . (Canada
models) brake system indicator light turns
on together with the ABS and ESC indica­
tor lights, the ABS/ESC regulating function
may have failed. Functions that stabilize
t he vehicle are no longer avai lab le. This
cou ld cause the vehicle to swerve and in­
crease the risk of sliding . Drive caref ully to
the nearest a uthorized Audi dea ler and
have the malfunction corrected.
(D Tips
For addit ional information on ESC and
ABS, refer to
c::> page 185 .
ABS/(@!) Anti-lock braking system (ABS)
This warning/indicator light monitors the ABS
and the electronic differential lock (EDL).
The warning/indicator light rII:1 (USA mod ­
els)/ [I] (Ca nada models) w ill come o n for a
few seconds when the ignition is switched on.
The light will go out after an a utomatic chec k
sequence is completed.
There is a malfunction in the ABS when :
- The warning/ indicator lig ht does not illumi ­
na te when you swi tc h t he ignition on.
- T he warning/i ndicator lig ht does not go out
after a few seconds .
- T he warn ing/ind icator lig ht illuminates
wh ile driving.
T he ESC indicator light also illuminates if
there is a malfunction in the ABS . The mes­
sage
Stabilization contro l (ESC) : Fault! See
owner 's manual
also appears in the inst ru­
men t clus ter display and a war ning tone
sounds.
Th e brake sy ste m will still respond even
without th e assi stan ce of the ABS sy ste m .
See y our authoriz ed Audi dealer a s soon a s
po ssibl e to re store full braking performan ce .
For more informat ion regarding the ABS
c::> page 185.
Malfunction in the brake system
If the brake war ning l igh t c::> page 15 and the
ABS wa rning illuminate
together there may be
a malfunct ion in the ABS , and there may a lso
be a malfunction in the brake system itself
c::> A . The AB S will not wo rk and you w ill no ­
tice a change in b raking response and per ­
formance .
In the event of a malfunction in the brake
s y stem
the warning/indicator light~
(USA mode ls)/ . (Can ada models) in the in­
strument cluster flas hes
c::> page 15.
Malfunction in th e electronic diff erential
lock (EDL)
The EDL works together w ith the ABS. The
ABS warning light will come on if there is a malfunction in the EDL system
c::> page 185 .
See your author ized Audi dealer as soon as
poss ible.
A WARNING
- I f the trm (USA mode ls)/ [I] (Canad a
models) warning light does not go ou t,
-
or if it comes on while dr iving, the ABS
system is not wor king p roperly. The vehi­
cle can then be stopped only w it h the
standard brakes (without ABS). You w ill
not have the protect ion ABS prov ides.
Contact your authorized Audi dealer as
soon as possible .
-USA models: If the ~ warning light
a nd the
trm warning light come on to­
gethe r, the rear wheels could lock up
f ir st under hard bra king. R ear wh eel lock­
up can ca use loss of vehicle control and
a n ac cident . H ave yo ur vehicle repaire d
immed iate ly by yo ur authorize d Aud i
dea le r o r qualified works hop. Drive slow­
ly and avo id sudden, hard brake applica­
tions.
- Canada models: If the brake warning
light . and the ABS warning light
[I]
come on together, the rear wheels could
lock up first under hard braking. Rear
wheel lock-up can cause loss of vehicle
con tro l and an accident. Have your

20 Instruments and warning /indicator lights
vehicle repaired immediately by your au­
thorized Audi dealer or qualified work­
shop. Drive slowly and avo id sudden,
hard brake applications.
~ J!f Safety systems
The
II (USA models)/ m (Canada models) in­
d icator light monitors the safety systems (e .g .
a ir bags, pretensioners) and illuminates for a
few seconds each time you switch the ignition
on.
If the
ffl (USA models)/ EI (Canada models)
indicator light does not go out, or if it illumi­
nates whil e you are driv ing, or if it sta rts to
b link , then there is a malf unction somewhere
in the system. If the light does not illuminate
when you switch the ignition on, this also
means there is a ma lfunction.
A WARNING
If you have a malfunction in the safety sys­
tems, contact your authorized Audi dealer
immediately . Otherwise the safety sys­
tems may not work properly in an acci­
dent .
(0) Worn brake pads
Ell Brake pads!
If the warning light illumina tes, immediately
contact your authorized Audi dealer or quali ­
fied workshop to have all brake pads inspect­
ed. On USA models the warning light
Ei'I
comes on together with the warn ing light
1111 -Both sets of b rake pads on an axle
must always be replaced at the same time .
A WARNING
Driving with bad brakes can cause a colli­
sion and serious personal injury.
- If the warning light
Ell and the warning
light
11111 ) with the message Brake
pads! comes on in the instrument cluster
l) - : USA mod els only
-
display, immediately contact your au­
thorized Audi dealer or qualified work­
shop to have all brake pads checked or replaced if necessary.
EPC Electronic power control
This warning/indicator light monitors the
electronic power control.
The ~ warning/indicator light (Electronic
Power Control) illuminates when you switch
the ignition on as a function check.
(D Tips
If this warning/indicator light illuminates
while you are driving, then there is a mal­
function in the engine electronics. Have
the malfunct ion corrected as soon as pos­
sible by your authorized Audi dealer or a
qualified repair facility.
0 Malfunction Indicator Lamp (MIL)
Th e Ma lfunction Indicator Lamp (MIL) is part
of the On-Board Diagnostic (OBD II) system.
T he symbo l¢• lights up when the ignition is
switched on and will turn off after the engine
has started and has settled at a constant idle
speed. This indicates that the MIL is working
properly.
T he warning light illuminates when there is a
malfunction in the engine electronic system .
Contact your authorized Audi dea ler and have
the malfunction corrected.
An improperly closed fuel filler cap may a lso
cause the MIL light to illuminate
~ page 210.
For more information ~page 29.
!?; Engine speed limitation
Applies to vehicles: with engine speed limitation
(II Do not exceed max. engine speed of
XX.XX rpm

22 Instruments and warning/indicator lights
If the symbol II illuminates, the dynam ic
headlight range cont rol is no longer wo rking
properly. Have the system checked and re­
pa ired at your author iz ed Audi dealer.
~O Adaptive Light
Applies to vehicles: with adaptive light
111 Aud i adaptive l ight: defective
If t he indicator lig ht t urns on a nd th is mes­
sage appears, t he re is a ma lfunction in the
adapt ive light system. The headlig hts still
function.
Go to an a uth o rized dea le rship to have the
headlights or the contro l unit for the adapt ive
light repa ired.
~ o Light/rain sensor
Applies to vehicles: with light/rain sensor
£I Automatic headlights/ automatic wipers
defectiv e
If the indicator light t urns on and th is mes­
sage appears, the lig ht/ra in sensor is n ot
f u nctioning cor rectly .
For safety reasons the low beams are turned
on permanent ly w ith the switch in AUTO .
H owever, you can c ontinue to turn the lights
on and off using the light switc h. You can still
con trol a ll funct ions tha t are in depe nden t of
the rai n sensor through the wi ndshi eld wipe r
l eve r.
Contact your author ized Audi dealer as soon
as possible to have the prob lem cor rected .
Q Adaptive dampers
Applies to vehicles: with Audi drive select and adaptive
dampers
H Suspension: System fault!
If t he
H symbol in the disp lay comes on,
there is a malfunction in the adaptive damp ­
e rs . Please go to an authorized Audi dea ler or
qua lified workshop to have the malfu nction
repaired.
I-: Sport differential
Applies to vehicles: with Audi drive select and sport dif­
ferential
Sport differential : System fault!
There is a malfunction with t he sport d iffe ren­
tia l.
D rive to your au thorized A udi dealer immedi ­
ate ly to have the ma lfunction corrected.
Sport differential : Overheating
T he trans missio n tempera ture has inc reased
s ignifica ntly due to t he spor ty d riving manner .
Dr ive in a less sporty ma nner until the tem­
p era ture re tur ns to the normal range and t he
in dica to r li ght switc he s of.
_& WARNING ... -
Co ntac t your author ized Audi dealer or
qu alified wor kshop if the s port differential
i s faulty or malfunct io ning. T he repair
must be perf ormed by t rained personnel
usi ng the co rrect oil in o rder to ensure
safety.
~ Ignition lock
l3 Ignition lock defective
There is a malfunction in the e lectronic igni­
t ion loc k. Please go to a n author ized Audi
dealer or other qualified worksh op to have t he
malfu nction repa ired .
¢ Q Turn signals
Wh eneve r yo u use the left
Ill o r th e r ight 8]
tu rn s ignal, the in dicato r li ght blin ks. W he n
yo u use t he emerge ncy fla she rs, bo th indic a­
tor lights flash.
If one of the turn s igna l light bulbs bu rn o ut,
t h e tur n sig nal w ill bli nk twi ce as fast as no r­
m al. Ca ref ully dr ive to you r a utho rized Aud i
dealer imme diate ly to have the m alfunction
cor rected.

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Driver information
display
Introduction
The Driver information display inside the in ­
strument cluster provides you, the driver ,
with important information .
Fig. 7 In strum en t cl ust er: center displa y
Fi g. 8 Wi per lever: con trols fo r the menu display
Cent er d ispla y
With the ignition on, the display in the Dr iver
I nforma tion System shows the fo llowing in­
formation :
- CD* inserted or Radio* station set
- Outs ide temperature* : At temperatures be-
low 41 °F (+S
0 (), a snowflake symbol ap­
pears in front of the temperature display
c::> &_ .
- Warning if one of the doors, front lid or en-
gine compartment lid is not closed .
Additional function s
You can open the following functions in the
Driver Informat ion System display by pressing
the
! R ES ET I button c::> fig . 8 one or more times:
Digital speedometer *
Tire pressure monitoring*
c::> page 257
Dri ver inform ation di spl ay 23
Trip computer* c::> page24
Effi ciency program* c::> page 26
Service in terval display c::> page 28
Speed war ning c::> page 89
Gearshift selector positions <=> page94
Automatic transmission
Adaptive cr uise control *
c::> page 101
Auto Check C ontrol
Some f unctions and vehicle components are
scanned for their operating sta tus when yo u
switch the ign ition on and wh ile you are driv ­
ing . Malfunctions or required s ervice proce­
dures are signaled audib ly and indicated by
red and yellow illuminated symbols and re­
minders in the display .
A WARNING
-
- Never rely exclusively on the outside
temperature display to determine if a
road surface is icy o r not . Keep in m ind
th at r oad surfaces, espec ia lly br idges
and overpasses, co uld be ice covered and
slippery even at an outside tempe ratu re
above 41 ° F (+S °C).
- Always remember , even if the "snow­
f lake" symbo l (ice warning) does not ap­
pear in the d isp lay, black ice cou ld be on
the road .
- Always reduce your speed and drive with
special care in cold weather conditions
when the chance of encountering icy
road surfaces increases.
{I) Tips
If the vehicle is stationary, or if yo u a re
driving at a very lo w speed, the tempera­
ture shown in the display might be s light ly
higher than the actua l outs ide tempera­
ture. This is caused by the heat be ing radi­
ated from the engine .

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¢fig. 10. The data from the single-trip mem ­
ory (memory leve l 1) is being displayed if a
D
appears in the display. If a fJ is shown, then
the data from the total-trip memory is being
d isplayed (memory level
2). The fuel pump
nozzle
ii indicate s the efficiency program*
¢page 26 .
Single-trip memory (Trip computer 1)
The single -trip memory stores the trip infor­
mat ion from the time the ignition is turned on
until it is turned off. If the trip is continued
within 2 hours from the time the ignition was
turned off, the new data will be included in
the calculation of the current trip informa­
tion. If the trip is interrupted for
more than 2
hours the memory is reset automatically.
Total-trip memory (Trip computer 2)
Unlike the sing le-trip memory, the total-trip
memory is not reset automatically. This per­
mits you to evaluate your driving data for the
enti re pe riod between manual resets.
Efficiency program*
The effic iency program can help you to use
less fuel ¢
page 26.
Operation
Applies to vehicles: with trip computer
The trip computer is controlled by two
switches on the windshield wiper lever.
Fig. 11 Wind shi eld w iper lever: controls for the t rip
comp uter
Operating
~ To display the trip computer memory leve ls,
press the
I RESE T I button @¢ fig. 11 re-
Driver information display 25
peated ly until the desi red memory level is
show n in the display.
~ To display trip informat ion with in a memory
level, press the top or bottom part of the
function selection switch @.
The trip computer will not operate un less the
ignition is on. When you turn on the ign it ion,
the function that was in use when you last
turned the ignition off will be displayed .
In addition to information about the trip com­
puter (trip computer 1, 2 and the efficiency
program*), information about other systems
can also be shown in the disp lay. To switch the
display between the different information ,
tap the
! RESET I button @briefly.
Resetting values to zero
~ Select a value in the desired tr ip computer
or in the eff iciency program".
~ Press and hold the I RESE T I button @for at
least one second . All values in the selected
trip computer or in the efficiency program*
are reset to zero.
If the data in trip computer
1 are deleted ,
then the values in the efficiency program* w ill
also be reset.
With some vehicle equipment levels, the val­
ues for the single trip or total trip memory
can a lso be reset in the Infotainment system
¢page 25 .
(D Tips
All stored va lues w ill be lost if the vehicle
battery is disconnected.
Basic Settings for the trip computer
App lies to vehicles : wit h trip co mputer
The radio or MM!* operating unit is used for
setting the trip computer's basic settings.
~ Select: Function button !CAR !> Instrument
cluster > On-board computer 1
or On-board
computer 2 . .,.

28 Driver information d isplay
Fuel economy messages
App lies to vehicles: with trip computer w ith eff ici ency
program
Fig. 16 Display: fuel economy message
F ue l economy messages are disp layed when
fuel consumption is increased by certain con­ ditions. If you follow these fuel economy mes­
sages, you can reduce your vehicle's consump­
tion of fuel. The messages appear automati­
cally and are only displayed in the efficiency program. The fuel economy messages turn
off
automatically after a certain period of time.
~ To turn a fuel economy message off immedi­
ately after it appears, press the lRESET I but­
ton
c::> page 25, fig. 11 @ , or
~ Press the function selection switch
c::> page 2 5, fig. 11 @ .
(D Tips
-Once you have turned a fuel economy
message
off, it will only appear again af­
ter you turn the ignition on aga in.
- The fuel economy messages are not dis­
played in every instance, but rather in in­
tervals over a period of time.
Service interval display
The service interval display reminds you when
your next service is due.
Fig. 17 Display: Service interval display
The schedule for the next o il change or inspec­
tion is ca lculated automatically and displayed
accord ingly. The d isp lay works in two stages:
Service reminder
30 days before the next service is due, a serv­
ice reminder appears in the display when you
turn on the ign ition
c::> fig . 17 .
After about 5 seconds the display switches
back to normal. The distance and time re­
main ing are updated each time the ignit ion is
turned on until the date due for serv ice is
reached.
Service due
When the due date for service is reached, the message
Service due! appears in the instru­
ment cluster immed iately after you turn on
the ignition. Additional ly, a warning tone
sounds. After about 5 seconds the disp lay
switches back to normal.
Calling up the service schedules
If or when an oil change or inspection is due,
can be shown in the rad io or MMI* display by
selecting the service interval display in the car
menu. Select !CAR I function button
> Service
interval display
o r! CAR I function button > Car
systems*
control button > Servicing &
checks.

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Resetting the service interval display
Your authorized Audi dealer w ill rese t the cor­
responding service schedule after performing
the appropriate service on your vehicle. Yo u
also have the possibility to reset the oil
change schedule after having performed an
oil change according to Audi specifications.
Select
I CAR I function button > Service interval
display > Reset oil change interval
or !CARI
function button > Car systems* control but­
ton
> Servicing & checks > Reset oil change
interval.
0 Note
- Only reset the oil change d isplay when
you have completed an oil change.
-If you disconnect the battery terminals,
no calculat ions can be made for the serv­
ic e interval display during this tim e and
no service rem inder will appear. Remem­
ber that observing the proper service in­
terva ls is vitally important to extending
the life of your vehicle, particularly the
engine, and maintaining its va lue. Even if
the mileage dr iven is low, the max imum
period of one year from one serv ice to
the next must not be exceeded .
(D Tips
The informat ion in the Service Reminder
remains stored even when the vehicle bat­
tery is disconnected.
On-Board Diagnostic
system (OBD)
Malfunction Indicator Lamp (MIL)
The Malfunction Indicator Lamp (MIL) ¢..ift in
the instrument cluster is part of the On-Board
Diagnostic (OBD II) system.
The warning/indicator light illuminates when
the ignition is switched on and goes out after
the engine starts and the idle has stabilized .
This indicates that the MIL is work ing proper­
l y.
Driver information display 29
If the light does not go out after the engine
is started, or illuminates while you are driv­
ing , a malfunction may exist in the engine sys ­
tem.
If the light illuminates, the catalytic con­
verter could be damaged.
Continue d rivin g
with reduced power (avoid­
ing su sta ined high speeds and/or rapid accel ­
erations) and have the cond ition corrected.
Contact your authorized Audi dealer.
If the light illuminates, the electronic speed
li miter may also be malfunct ioning. For more
information
c;,page 30, Electronic speed
limiter.
An improperly closed fuel filler cap may also
cause the MIL light to illuminate
c:;, page 210.
On-Board Diagnostics
Fig. 18 Location of Data Link Connector (D LC)
On-Board Diagnostics monitors the compo­
nents of your emission contro l system . Each
monitored component in your engine system
has been assigned a code. In case of a mal­
function, the component will be identified
and the fault stored as a code in the control
module memo ry .
The MIL light may also illuminate if there is a
leak in the on-board fuel vapor recovery sys­
tem. If the light illumi nates afte r a refueling,
stop the vehicle and make sure the fuel filler
cap is properly closed
¢ page 210.
In order to make an accurate diagnosis, the
stored data can on ly be displayed using spe­
c ial diagnostic equipment (generic scan tool
for 080). .,.

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Opening and closing
Power locking system
General description
The power locking system locks or unlocks all
doors and the rear lid simultaneously.
You can lock and unlock the vehicle centrally.
You have the following choices:
- Remote master key~
page 34,
-Door handles with convenience key*
O?page 35,
-Lock cylinder at the dr iver's door
r=> page 3 7, or
- Power lo cking switc h inside
<:!>page 35.
Automatic locking
The automat ic locking feature locks all the ve­
hi cle doors and the rear lid when you drive
faster than 9 mph (15 km/h).
The car is un locked again once the ignition key
is removed . In addition, the veh icle can be un­
locked if the opening fu nction in the power
lock ing system sw itch or at one of the door
l eve rs is actuated. The Au to Lo ck function can
be turned o n and off in the rad io or
MMI*
r=> page 36 .
Additionally, in the event of a c rash with air­
bag deployment the doors are automatically
u nl ocked to a llow access to the veh icle.
Selective unlocking
When you lock the vehicle, the power locking
system w ill lock the doors and the rear lid.
W hen unlocking, you ca n set in the rad io or
M MI* whethe r
only the dr iver's door or t he
enti re ve hicle should be unlocked
r=> page 3 6.
Anti -theft alarm warning system
If the a nti-theft alarm warning system de­
tects a brea k-in into t he vehicle, acoust ic and
visua l wa rning sig na ls are triggered.
The an ti-theft warn ing system is act ivated au­
tomatically when you lock the vehicle .
It is de­
activated when u nlocking using the remote
Opening and clo sin g 31
key, w ith the mechan ica l key, and when you
switch on the ignition.
T he al arm a lso t urns off w hen t he a la rm cy cl e
has expired.
Turn signals
When you u nlock the ve hicle, the turn signals
flash twice, when yo u lock it once. If they do
not flash, one of the doo rs, the luggage com ­
partment lid or the hood is not lo cked or the
ignition is s till sw itched on.
Unint entionally locking yourself out
In the follow ing cases there safeg uards to
prevent you lock ing you r remote master key in
t h e ve hicl e:
- The vehicle does not loc k w ith the power
lock ing switc h
r=> page 35 if the drive r's
door is open.
- On veh icles with convenience key*, if the
most recently used master key is in the lug­
gage compartment, the rear lid is a utomat i­
cally u nlocked again after it is closed.
Do not lock your veh icle w ith the remote mas­
te r key o r convenience key* unt il all doors a nd
the rear lid a re closed. In this way you avoid
l ocking yo urse lf o ut accidentally.
_&. WARNING
-
-When you leave the veh icle, alw ays re ­
move the ignition key an d take it with
you. This wi ll prevent passengers (chil­
dren, for example) from acc identally be ­
ing locked in the vehicle should they acci­
dentally press the power locking switch in the front doors.
- Do not leave ch ildren inside the vehicle
unsuperv ised. In an emergency it would
be imposs ible to open the doors from
the o utside w itho ut the key.
(D Tips
- In the event of a crash with airbag de­
ployment all locked doors will be auto­
matically unlocked to give access to the
v ehicle occupants from the outside.