2018 AUDI A4 ignition

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A WARNING
Do not assume the roads are free of ice based
on the outside temperature display . Be aware
that there may be ice on roads even when the outside temperature is around 41 °F (+5 °C)
and that ice can increase the risk of accidents.
@ Tips
- Depending on vehicle equipment, the in ­
strument illumination (needles and gauges) may turn on when the lights are off and the
ignition is switched on . The illumination for
the gauges reduces automatically and even­
tually turns off as brightness outside in­
creases. This function reminds the driver to
turn the low beams on at the appropriate
time .
- You can select the units used for tempera­
ture, speed and other measurements in the
Infotainment system
c::> page 248.
- If your vehicle is stationary or if you are driv­
ing at very low speeds, the temperature dis­
played may be slightly higher than the ac­
tual temperature outside due to the heat ra­
diating from the engine .
- At temperatures below 41 °F ( +5 °C), a
snowflake symbol appears in front of the
temperature display
c::> A .
Coolant temperature indicator
The coolant temperature
display @c::> page 10,
fig. 3 or c::> page 10, fig. 4 only functions when
the ignition is switched on. To prevent engine
damage, please observe the following notes
about the temperature ranges.
Cold range
If only the LEDs at the bottom of the gauge turn
on, the engine has not reached operating tem­
perature yet . Avoid high engine speeds, full ac­
celeration and heavy engine loads.
Normal range
The engine has reached its operating tempera­
ture once the LEDs up to the center of the gauge
turn on. If
the. indicator light in the instru-
Cockpit overview
ment cluster display turns on, the coolant tem­
perature is too high
c::> page 30.
(D Note
- Auxiliary headlights and other accessories in
front of the cooling-air intake impair the
cooling effect of the coolant. This increases
the risk of the engine overheating during
high outside temperatures and heavy en­
gine load.
- The front spoiler also helps to distribute cooling air correctly while driving. If the
spoiler is damaged, the cooling effect will
be impaired and the risk of the engine over ­
heating will increase . See an authorized
Audi dealer or authorized Audi Service Fa­ cility for assistance .
@ Tips
Diesel engines: due to the high efficiency of
these engines, the engine may not always reach operating temperature in cold outside
temperatures . This is normal and not a cause
for concern.
Engine oil temperature display and boost
indicator
App lies to : vehicles wi th engine o il temperatu re display/boost
indica tor
Appl ies to : vehicles wi th analog ins trumen t cl uster
The engine oil temperature and boost indicator
are only shown in the lap timer display
c::> page 106.
Engine oil temperature indicator
Applies to : vehicles wit h Audi v ir tu al coc kpit
The engine oil temperature is only shown in the
expanded view or in the sport view
c::> page 15.
When engine oil temperatures are low, the dis­play--- °F
(---°C) appears in the instrument clus­
ter.
The engine has reached its operating tempera­
ture when the engine oil temperature is between 176 °F (80 °C) and 248 °F (120 °C) under normal
driving conditions. The engine oil temperature
.,,.
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Cockpit overv iew
may be higher if there is heavy eng ine load and
high temperatures outside . This is not a cause for
concern as long as
the .¢ page 31 or II
¢ page 31 indicator lights do not turn on.
Boost ind icator
Applies to: vehicles with Audi virtual cockpit
The boost indicator is only displayed in the sport
view
¢ page 15 .
The current eng ine load (meaning the current
boost pressure) is indicated by a bar .
Tachometer
The tachometer displays the engine speed in rev­
olutions per minute
(RPM).
The beginning of the red zone in the tachometer
indicates the maximum perm iss ible engine speed
for all gears once the engine has been broken in
and when it is warmed up to operating tempe ra­
ture. Before reaching this zone, you should sh ift
i n to the next h ighest gear, select the D/S selec­
tor lever position, or remove yo ur foot from the
accelerator pedal.
CD Note
The needle in the tachometer @ ¢ page 10,
fig . 3
o r¢ page 10, fig. 4 may only be in the
red area of the gauge for a short time or there
is a risk of engine damage . The location where
the red zone begins varies depending on the
eng ine.
@ For the sake of the environment
Upshifting early helps you to save fuel and re­
duces operating noise.
Fuel level
The display (J) ¢ page 10, fig. 3 or ¢ page 10,
fig . 4
only functions when the ignition is switch­
ed on . When the display has reached the reserve
mark, a red LED turns on and the
tD in dicator
light tu rns
on ~ page 34. The red LED wi ll blink
when the fuel level is ve ry low.
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For the tank capacity in your vehicle, refer to the
Technical
Data ¢ page 381.
CD Note
Never drive until the tank is comp letely emp­
ty. The irregu lar supply of fuel that results
from that can cause engine misfires . Uncom­
busted fue l w ill then enter the exhaust sys­
tem. This can cause overheating and damage
to the catalyt ic converter.
Odometer
Fig . 5 In st rum en t cluster : odometer and reset b utto n
Trip odomet er and odometer
The trip odometer shows the distance driven
s ince it was last reset.
It can be used to measure
short distances.
The trip odometer can be reset to zero by press ­
ing
the ~ reset button.
The odometer shows the total distance that the
vehicle has been driven.
Malfunction indicator
If there is a malfunction in the instrument clus­
ter,
DEF will appear in the trip odometer disp lay.
Have the malfu nction corrected as soon as possi­
ble.
(j) Tips
The units of measu rement can be set in the
I nfotainment system
¢ page 248 .

Multifunction steering
wheel plus
Operating
Applies to: vehicles with multifunction steering wheel plus
You can use the multifunction steering wheel
plus to operate the driver information system
and the
MMI functions, adjust the volume and
switch the voice recognition system on and off.
Fig. 6 Dr iver information system d isplay
Fig. 7 Left s ide of multifunction steer ing wheel p lus
Requirement: the ignition must be switched on.
The driver information system contains multiple
tabs©¢ fig. 6 that display various information
@.
The following tabs are available , depending on
vehicle equipment:
First tab Vehicle (on-board computer)
¢ page 17
Second Messages
taba)
Cockpit overview
Third tab
Radio
Media
¢ page 18
Fourth tab Telephone* ¢
page 19
Fifth tab Nav igation* ¢ page 20
Map*¢page21
•> Thi s tab is only v is ible when t he re is at leas t one indicato r
light or message displayed .
@ Button l<1 t>I
- Switching tabs : press the l<1 t> I button repeated­
ly until the desired tab is shown (for example,
Radio).
@ !VIEWI button
Switching views or reduc ing the display
¢page 15.
® Button ~
Return to functions at higher levels
@ Control buttons Q] and Kl
Open/close the selection menu or options menu
¢page 14.
0 Left thumbwheel
- Selecting a function in a menu/list :
turn the
left thumbwheel to the desired function (for
example, selecting a frequency).
- Confirming a selection: press the left thumb­
wheel
(i) ¢ fig. 7.
- Zooming in/out on the map : when a map is
disp layed, turn the left thumbwheel to zoom in
and out on the map.
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Cockpit over view
The short -term memory collects driving informa­
tion from the time the ignition is switched on un­
til it is switched off . If you cont inue driv ing with­
in two hours after switching the ignition off, the
new values are included when calculat ing the cur­
rent tr ip informat ion.
Unlike the short-term memory, the long-term
memory is not erased automat ically. You can se­
lect the time period for evaluat ing trip informa­
tion yourself .
Fuel con sumpti on
The current fue l consumption can be shown us­
ing a bar graph
cc> fig. 14. The average cons ump­
tion stored in the short-term memory is also dis­
played. If the bars are green or the gray tone on
the bars changes (depending on the equipment),
your veh icle is sav ing fuel by the following func­
tion:
- Recupe ration : electrical energy can be stored in
the ve hicle battery when the vehicle is coasting
o r driving downhi ll. The bar will move toward
0 /0.
(D Tips
The date, time of day and t ime and date for­
mat can be set in the Infotainment system
cc>page248 .
Energy consumers
Fig . 15 Inst rume nt cluste r: e nergy cons ume rs
In the En ergy con sumer s view, the othe r equip­
ment that is currently affecting fuel consumption
is listed in the first tab (on-board comp ute r) . The
d isp lay shows up to three ene rgy consumers @
cc> fig. 15. The eq uipme nt using the most powe r is
listed first. If more than three items using power
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are switched on, the eq uipment that is c urren tly
using the most power is disp layed .
A ga uge @ also shows the c urrent tota l con­
s u mption of a ll othe r consumers .
. Radio
Applies to: vehicles with multifunction steering wheel
.,. Press the I MODE i button on the m ultif un ction
s teer ing whee l repeatedly u nti l the Radio/ Me­
dia tab is d isp layed.
Applies to: vehicles with multifunction steering wheel plus
.,. Press the I <11>I button repeatedly until the Ra-
dio/Med ia tab is d isplayed.
.,. Press the left control b utton cc> page 14 .
Depending on veh icle equipment, the following
funct ions may be ava ilable i n the dr iver informa­
tion system .
-Select ing the frequen cy band : select and con ­
firm a freq uency band .
-Selecting a station from the station list : select
and confirm a radio station.
- Select ing a station from the preset s list : select
and confirm
Presets and then a radio station .
-Opening a media sou rce: se lect and confirm
Swit ch to media.
Additional settings
- Sele ct: r ight cont rol b utton> desired entry.
Depend ing on the function se lected, the follow­
i ng additional settings may be possible:
- "Now Playing" screen : see cc> page 226.
Media .
Requirement: a media drive must contain audio/
video files
cc> page 228 .
Applies to: vehicles with multifunction steering wheel
.,. Press the I MODE i button on the mu ltifunction
steer ing whee l repeatedly until the Radio/Me-
dia tab is d isplayed .
.,.

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 -
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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.
..,.
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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.
~
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C© ) Brake system
rm Brakes overheating . Please shift to D
rm Brakes overheating. Please select a gear and
follow gear recommendation
There was a heavy load on the brakes. Engage a
suitable gear (manual transm ission) or place the
selector lever in the D/S position (automat ic
transmission) to use the eng ine braking effect
and reduce the load on the brakes.
~·
:t:J /(0 : Brake pads
II (USA models)/£i1 (Canada models) Brake
pads: wear limit reached. You can continue driv­
ing. Please contact Service
The brake pads are worn.
Drive to an authorized Aud i dealer or authorized
Aud i Service Facility as soon as possible to have
the malfunct ion corrected .
c:l:::, Engine control
II Drive system: malfunction! Please contact
Service
There is an engine control malfunction .
Drive slow ly to an author iz ed Audi dealer or au­
thor ized Audi Service Facility to have the eng ine
checked .
W Engine control (diesel engine )
Applies to: vehicles with diesel engines
The engine is preheating if the II indicato r light
turns on when the ignition is switched o n.
I f the indicator light does not turn on or b links
while driving , there is an eng ine control malfunc ­
tion .
Immediately drive slowly to an authori zed Aud i
dealer or authorized Aud i Serv ice Facility to have
the malfunction co rrected .
o Malfunction indicator lamp (MIL)
The malfunction indicato r lamp (MIL) is part of
the On -Board Diagnostic System (OBD II). The Cockpit overview
('4 ,;ymbol turns on when the
ignition is switched
on and turns off again once the engine is started
and running at a steady idle speed. This indicates
that the MIL is function ing correctly.
T he indicator light turns on if there is a malfunc­
tion in the engine electronics. See an authorized
Audi dealer or authorized Audi Service Fac ility to
have the malfunction corrected . For additional
information, see
c:::> page 24.
The indicator light can a lso turn on if the fuel fill­
er cap is not closed correctly
c:::> page 317.
,m,,
Diesel particulate filter
Applies to : vehicles wit h diesel eng ine a nd diesel particulate
filter
II Particulate filter : malfunction! See owner's
manual
T he diese l particulate filter requires regenera­
tion . To support the filter 's self-cleaning func­
tion:
Drive for approximately 15 minutes at a mini ­
mum of 37 mph (60 km/h) in 4th or 5th gear
(manua l transmission) or in the S selector lever
position (automatic transmission). Keep the en­
gine speed at approximately 2,000 RPM . The
temperature increase that will result from th is
can burn off the soot in the filter . The ind icator
light will turn off when the cleaning has complet­
ed successfully .
If the indicator light does not turn off, drive im­
med iate ly to an authori zed Audi dealer or author­
ized Audi Service Facility to have the malfunct ion
corrected .
A WARNING "---
Always adapt your speed to the current
weather, road and traffic conditions. You
should never disobey traffic laws in order to
follow driving recommendations .
@ Tips
For additional informat ion on the diesel par­
ticulate filter, see
c:::> page 322 .
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