light AUDI A4 2015 Service Manual

Warm and cold 79
Operation
We recommend pressing the IAUTO I button and setting the temperature to 72 °F (22 °C).
Fig. 94 Automatic cl imate control system: control
Fig. 95 3-zone deluxe automatic cl imate control': co ntrols
Press the buttons to turn the functions on or
off. Use the d ials to adjust the temperature,
the blower speed and the a ir distribution. The
LE D in a button will light up when the func­
tion is switched on. The settings are displayed
for a few seconds in the radio or MMI* display.
In vehicles with a 3-zone deluxe automatic cli­
mate control systems*, the driver and front
passenger side can be adjusted separately.
The settings are also displayed in the climate
con trol system display .
~ IOFFI Switching the climate control
~ system on/off
rl
:5: The IOFFI button switches the climate control
~ sys tem on or off . It also switches on when you rl
press the knob. Airflow from outside is
blocked when the climate control system is
switched off.
IA/C l Switching cooling mode on /off
The air is not coo led and humidity is not re­
moved when cooling mode is switched off.
This can cause fog on the w indows. Cooling
mode switches off automatically when the
outside temperature is be low zero.
1-1 Switching recirculation mode on/off
In recircu lation mode, the air inside the vehi ­
cle is circulated and filtered. This prevents the unfiltered air outside the vehicle from enter-
ing the vehicle interior. We recommend "'

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0 ::.,: co ,...., \!) ..,.,
,...., ..,., ,....,
~ Automatic transmission: Step on the brake
peda l and move the se lector lever to the P
or N position .
~ Press the key c::> fig. 97 -the eng ine will
start.
Sw itching the i gnition on /off
If you wou ld like to switch the ignition on
without sta rting the engine, follow t hese
steps :
~ Insert the key into the ignition lock .
~ Press the key briefly without pressing the
clutch peda l (for manual transmissions) or
the brake peda l (for automatic transmis­
s ions) .
~ To switch the ignition off, press the key
again .
When starting the engine, major e lectr ica l
loads are switched off temporarily .
You can on ly remove the key with the ignition
switched off.
If the engine sho uld not sta rt immedia tely,
the starting process is automatically stopped
after a short time. Repeat starting proced ure .
A WARNING
-Never allow the engine to run in confined
spaces -danger of asphyxiation.
- Never remove the ign ition key from the
ignition look while the vehicle is moving.
Otherw ise, the steering lock could sud­
denly engage and you would not be able
to steer the vehicle.
- Always take the key with you whenever
you leave your vehicle . Otherwise, the
engine could be started or e lectr ical
equipment such as the power w indows
cou ld be operated. This ca n lead to seri­
o us inj ury.
- Never leave ch ild ren or persons requiring
assistance unattended in the veh icle. The
doors can be loc ked using the remote
transmitter, preventing people from es­ caping from the vehicle on their own in
the event of an emergency. Depend ing
on the time of year, people inside the ve-
On th e ro ad 83
hicle can be exposed to very high or very
low temperatures.
(D Note
Avoid high eng ine rpm, fu ll throttle and
heavy engine loads unti l the engine has
reached operating tempe rat ure -other­
wise you r isk eng ine damage.
@ For the sake of the environment
Do not let the engine run while parked to
warm up. Begin driving immediately. This
reduces unnecessary emissions.
@ Tips
- If the key cannot be removed from the
ignition lock, you have to pull the me­
chanical key out of the master key in or­
der to be able to lock the vehi-
cle <=:>
page 34.
-After starting a cold engine, there may
be a brief period of increased no ise be­
cause the oil pressure must first bu ild up
in the hydraulic valve adjusters. This is
normal and not a cause for concern.
- If you leave the veh icle with the ignition
switched on, the ign it ion w ill switch off
afte r a certa in per iod of t ime . Please
note that ele ctrical equ ipment such as
exterior lights will sw itch off as well
when that happens .

84 On the road
Starting the vehicle with the emergency
key
Applies to vehicles: with ig ni tion lock
You can use the emergency key as an ignition
key in on emergency.
Fi g. 98 Glove compar tme nt: Adapter for emergency
key
Fig. 99 Inse rt emergency key into the adapter
.. Take the adapter for the emerge ncy key out
of the glove compartment
c!> fig . 98 .
.. Push the emergency key c::> fig. 99 fully into
the adap ter . Make sure tha t the Aud i rings
are facing up.
.. Press the emergency key in the adapter
down until it latches audibly .
.. Insert the adapte r with the emergency key
forward into the ignition switch. The engine
can now be started as usual.
Stopping the engine
App lies to vehicles: with ig n ition lock
.. Bring the vehicle to a full stop .
.. Automatic transmission: Move the selector
lever to the P or N pos ition .
.. Press on the ignition key. The engine is
t ur ned off.
.. You can now remove the key.
Steering lock
T he steering locks when yo u remove the igni­
t ion key. The locked steering helps prevent
ve ­
hicle theft .
Emergency off
If it is necessary in unu sual circumstances, the
engine can be switched off while the veh icle is
moving. The engine will be switched off if you
press on the key for an extended period .
A WARNING ~
-Never turn off the engine before the ve­
hicle has come to a comp lete stop. The
fu ll function of the brake booster and the
power steering is not guaranteed. You
must use more force to turn or brake if
necessary. Beca use you cannot steer and
brake as you usually wou ld, this could
lead to crashes and ser ious injuries.
- For safety reasons, you sho uld a lways
park your vehi cle with the selector lever
in P. O therwise, the vehicle could in ad ­
ver ten tly roll away.
- The radiator fan can continue to run fo r
up to 1 0 minu tes
even after you have
turned off the engine and removed the
ignit ion key. The radiator fan can a lso
turn on agai n if the engine coo lant heats
up because of intense sunlight or heat
bu ild-up in the engine compartment.
- Always take the key with you whenever
you leave your vehicle. Otherw ise, the
engine could be started or electrical
equ ipment such as the power windows
could be operated. This can lead to seri­
ous injury.
- Never leave childre n or persons requiring
assistance unattended in t he vehicle . The
doors can be locked using the remote
transm itte r, preven ting people from es­
c a ping from t he ve hicle on the ir own in
the event of a n emergency . Depending
on the time of year, peop le inside the
ve­
hicle can be exposed to very high or very
low temperatures .

86 On the road
in the hy dra ulic valve adjusters. This is
norma l and not a cause for concern.
- If you leave the vehicle with the ignit ion
switched on, the ignition will switch
off
after a certain period of time . Please
note that e lectrica l equipment such as
exter ior lights w ill switch
off as well
when that happens.
Switching engine off
Applies to vehicles: with conven ience key
" Bring your vehicle to a complete stop.
"Automatic transmiss ion: Move the selector
lever to the P or N pos it ion.
" Press the
!START ENGINE STOPI b utton
r::!;pageBS, fig.100.
St eering lock
The stee ring locks when you turn the engine
off us ing the I STAR T ENGINE STOP I button
and open the dr iver's door. The locked stee r­
i ng helps preven t vehi cle theft.
Emergency off
If necessary, the eng ine ca n be sw itched off
with the selector leve r in the R or D/S pos i­
tions. To do so, step on the b rake pedal and
p ress a nd hold the
I START ENGINE STOP I but­
ton vehicle speed must be less th an 6 mph
(10 km/h).
_& WARNING
- Never t urn off the eng ine before the ve­
hicle has come to a complete stop . The
full function o f the brake booster and the
power steering is not guaranteed. You
must use more force to turn or brake if
necessary . Because you cannot steer and
brake as you usua lly would, this could
lead to crashes and se rious injur ies.
- For safety reasons, you s hould always
par k your vehicle with the se lector lever
in P. Ot he rwi se, the ve hicle co uld i nad­
vertent ly roll away.
- T he r adiator fan ca n continue to ru n for
up to 10 mi nutes even after yo u have
tu rne d
off the eng ine and remove d the ignit
ion key. T he radiator fan can a lso
tur n on again if the engine coo lant heats
up because of intense sunlight or heat
bu ild-up in the engine compartment.
- Always take the key w ith you whenever
you leave your ve hicle. Otherw ise, the
eng ine could be sta rted or elect rical
equ ipme nt such as the power windows
could be ope rated. This can lead to seri­
o us injury.
(D Note
If the engine has bee n under heavy load
fo r an extended pe riod, heat bu ilds up in
the engine compartment after the engine
i s sw itched
off -there i s a r is k of damag ing
the e ngine. A llow the eng ine to run at i dle
for about two minutes before switching it
off.
Driver messages
Ignition i s on
This message appears and a warning tone
sounds if you open the d river's door when the
ignition is sw itched on.
No key id entified
This message appears when t he
I S TART ENGI NE STOPI button is pressed if
there is no master key ins ide the veh icle or if
the system does not recognize it . Fo r exam­
ple, the master k ey cannot be recognized if it
is covered by an object (e.g. al uminum b rief
case) which
screens the radio s ignal. Elec tron­
ic dev ices such as cell phones can also inter­
fere with the radio s ignal.
Press brak e pedal to start engine
This message appears if you do not press the
brake pedal to start the eng ine in a veh icle
with an automat ic transm iss ion.
Press clutch pedal to sta rt engine
T his message ap pears if you do not press the
clutch pedal to start the engine in a vehicle
with a manual transmission. .,.

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Shift to N or P to start engine
This message appears when attempting to
start the engine if the selector lever for the
automatic transmission is not in the P or N
position. The engine can only be started with
the selector in these positions .
!!I Is the key in the vehicle?
This message appears if the master key is re­
moved from the vehicle with the engine run­
ning.
If the master key is no longer in the ve­
hicle, you cannot switch on the ignition after
stopping the engine and you also cannot start
the engine again. Moreover, you cannot lock
the vehicle from the outside with the key.
Shift to P otherwise vehicle can roll away.
Doors do not lock if lever is not in P.
This message appears for safety reasons
along with a warning signal.
It appears if the
selector lever for the automatic transmission
is not in the P position when switching off the
ignition. Move the selector lever to the P posi­
tion, otherwise the vehicle is not secured
against rolling away. You also cannot lock the
vehicle using the locking button* on the door
handle or using the remote key.
Convenience key defective! Use ignition lock
This message appears if the engine must be
started or stopped using the ignition key and
not the
I START ENGINE STOP! button.
On the road 87
Electromechanical
parking brake
Operation
The electromechanical parking broke replaces
the hand broke.
Fig. 101 Center co nsole: Parking b rake
.,. Pull on the switch@¢ fig. 101 to apply the
parking brake. The indicator lights in the
switch and • (USA models) . (Cana-
da models) in the instrument cluster illumi­
nate .
"'With the ignition switched on, step on the
brake pedal or the accelerator pedal and
press the switch @at the same time to re­
lease the parking brake. The indicator lights
in the switch and. (USA models)/ . (Can­
ada models) in the instrument cluster go
out.
Your vehicle is equipped with an electrome­
chanical parking brake. The parking brake is
designed to prevent the vehicle from rolling unintentionally and replaces the hand brake.
In addition to the normal functions of a tradi­
tional hand brake, the electromechanical
parking brake provides various convenience
and safety functions .
When starting from rest
- The integral starting assist helps you when
driving by automatically releasing the park­
ing brake ¢
page 88, Starting from rest.
-When starting on inclines , the starting as-
sist prevents the vehicle from unintentional-
ly rolling back. The braking force of the
parking brake is not released until sufficient
111>

88 On the road
driving force has been built up at the
wheels.
E mergency brake function
An emergency brake ensures t hat the vehicle
can be slowed down even if the
normal brakes
fail c::>
page 89, Emergency braking .
8_ WARNING
If a gear or a drive range (automatic trans­
mission) is engaged with the vehicle sta­
tionary and the engine running, you must in no instance accelerate or release the
clutch* carelessly. Otherwise the vehicle
will start to move immediately -risk of an
accident .
(D Tips
-If the parking brake is applied with the
ignition switched off, the indicator lights
i n the sw itch and -(USA models)/ .
(Canada models) in the instrument clus­
ter will go out after a certain per iod of
time .
- Occas iona l noises when the park ing
brake is applied and re leased a re no rma l
and are not a ca use for concern.
- Wh en the vehicle is parked, the parking
brake goes through a se lf-test cycle a t
regular intervals. Any assoc iated noises
are no rma l.
Parking
.. Press the brake peda l to stop the v ehicle .
.. Pull the switch @c::>
pag e 87, fig. 101 to set
the parking brake .
.. Automatic transmiss ion: Move the selector
lever to P .
.. Turn the eng ine off c::>
&_ .
.. Manua l transm ission: Shift into 1st gear .
.. When on incl ines or decli nes, tu rn the steer ­
i ng wheel so th at the vehicle will roll into
the curb if it begins to move .
8_ WARNING
-When you leave your vehicle -even if on­
ly briefly -always remove the ignition
key . Th is applies particularly whe n chil­
dren remain in the vehicle . Otherwise the
children could star t the eng ine , release
the par king brake or operate electrical
equipme nt (e.g. power windows). There
is the risk of an accident.
- W hen the veh icle is locked, no one -pa r­
ticularly not children should remain in
the vehicle . Locked doors make it more
difficult for emergency worke rs to get in­
to the vehicle -putting lives at risk .
· Starting from rest
The starting assist function ensures that the
parking broke is rel eased automatically upon
starting.
Stopping and appl ying parking brake
.. Pull the sw itch @c::> page 87 , fig. 101 to ap-
p ly the parking bra ke.
Starting and automatically releasing the
parking brake
.. When you start to dr ive as usual, the p ark ­
ing bra ke is automatica lly released and your
vehicle begins to move .
When stopping at a t raffic signal or stopping
in city t raffic on vehicles with an a utomatic
t ransmission, the parking brake can be ap­
plied. The vehicle does not have to be held
with the footbrake . The parking brake elimi­
nates the tendency to creep w ith a dr ive range
engaged. As soon as you drive off as usual,
the parking brake is re leased automat ically
and the vehicle starts to move .
Starting on slop es
When starting on inclines, the starting assist
prevents the vehicle from un in tent ionally roll­
ing back. The braking force of the parking
brake is not released until suffic ient driving
force has been built up at the wheels .
11>-

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Cruise control
Switching on
The cruise control system makes it possible to
drive at a constant speed starting at 20 mph (30 km/h).
0
f
~
0
Fig . 103 Contro l lever wi th push-but ton
Fig . 104 Display: Se lected speed
.,. Pull the lever to position(!)~ fig. 103 to
swit ch the system on.
.,. Drive at the speed to be controlled.
.,. Press button @ to set that speed .
.,
;1; 9 a: .,
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The stored speed a nd the green symbol
[ij;(i )~14 (US model)/ .. (Canadian model) are
shown in the display~
fig. 104 . The display
may vary, depending on the type of display in
your vehicle.
The speed is kept constant by modifying en­ gine power or through an active brake inter­
vention.
A WARNING
- Always pay attention to the traffic around you when the cruise control is in
operation . You are always responsib le for
your speed and the distance between
your vehicle and other vehicles.
On th e road 91
-For reasons of safety, cruise control
should not be used in the city, in stop­
and-go traffic, on twisting roads and
when road conditions are poor (such as ice, fog, gravel, heavy ra in and hydro­
plan ing) -risk of accident .
- Turn off the cruise control temporarily when enter ing turn lanes, highway exit
lanes or in construction zones.
- Please note that inadvertently ''resting" your foot on the accelerator pedal causes
the cruise control not to brake. This is
because the cruise control is overridden
by the driver's accelera tion.
- I f a brake system malfunction such as
overhea ting occurs when the cruise con­
trol system is switched on, the braking
function in the system may be switched
off . The other cruise contro l functions re­
main active as long as the indicator light
lij;(i )~14 (US models) ;a (Canad ian mod­
els) is on.
(D Tips
- Vehicles with manual transmission: You
can attain the set speed only if the gear
that is currently engaged will allow it, or
if it does not tax the engine and allows it
to run smoothly . Therefore shift into a
higher or lower gear in a timely manner .
- The brake lights illuminate as soon as
the brakes apply automatically.
Chang ing speed
.,. To increase/decrease the speed in incre­
ments, tap the lever in the
0 10 direction
~ page 91, fig.103 .
.,. To increase/decrease the speed quick ly, hold
the lever in the
0 10 direction until the de­
sired speed is displayed.
You can also press the accelerator pedal down
to increase your speed, e.g . if you want to
pass someone . The speed you saved earlier
will resume as soon as you let off of the acce l-
erator pedal. .,..

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Transmission Manual transmission
Gearshift lever
App lies to vehicles: with manual transmission
The clutch pedal must be depressed all the
way before you can start the engine.
T he manual transmission in your Audi is
equipped with an
interlock-feature.
~ Depress the clutch pedal all the way.
~ Start the eng ine with the gearshift lever in
Neutral and the clutch pedal depressed.
(D Note
Always depress the clutch pedal fully when
changing gears . Do not hold the vehicle on
a hill with the clutch pedal partially de­
pressed. This may cause premature clutch
wear or damage .
@ Tips
-Resting your hand on the gearshift lever
knob while driving will cause premature
wear in the transmission.
- The back-up lights go on when you shift
into Reverse w ith the ignition on.
Gearshift pattern (6-speed manual
transmission)
Applies to vehicles: with manual transmission
Fig. 105 Gearshift pattern : 6-speed manual transmis­
sio n
Engaging reverse gear (R)
~ Move the shift lever all the way to the left,
press it down, then push it forward . Transmission
93
Especially after driving forward, stop the vehi­
cle completely, shift into
Neutral and rest the
shift lever br iefly in Neutral before shift ing in­
to
Reverse.
multitronic., S tronic.,
tiptronic
Introduction
Applies to vehicles: with multitronic/S tronic/tiptronic
The automatic transmission is controlled elec ­
tronically. The transmission upshifts or down­
shifts automatically depending on which drive
program is selected .
When a
moderate driving style is used, the
transmission selects the most economical
driving mode. It will then change up early and
delay the downshifts to give better fuel econ ­
omy .
The transmission switches to a sporty mode
after a kick-down or when the driver uses a
sporty driving style characterized by quick ac­
celerator pedal movements, heavy accelera­
t ion, frequent changes in speed and trave ling
at the maximum speed.
If desired, the driver can also select the gears
manually (tiptronic mode)~ page 93 .
Various automatic transmissions may be in­
stalled, depending on the model:
multitronic transmission
The multitronic transmission is a continuously
variable transmission. Power is transferred us­
ing a multidisk clutch. In contrast to conven­
tional automatic transmissions using shifting
operations, the transmission ratio in the con­
tinuously var iable transmission is changed
continuously . This optimizes the comfort level
and conserves fuel.
S tronic transmission
The S tronic is a dual-clutch transmission .
Power is transferred using two clutches that
work independently from one another_ They
replace the torque converter used in conven­
tiona l automatic transmissions and allow the ..,_

94 Transmi ssion
vehicle to accelerate without a noticeable in­
terruption in traction.
tiptronic tran smission
In the tiptronic transmission, power is trans­
ferred by a torq ue converter.
Selector lever positions
Applies to vehicles: with multitronic/5 tronic/tiptronic
Fig. 106 D isplay in the instrume nt duste r: selector
lever in position P
The se lector lever position engaged appears
next to the selector lever as well as in the in­
strument cluster display.
P - Park
In th is selector lever pos it ion the transmis­
sion is mechanically locked. Engage P only
when the vehicle is
completely stopped ¢ &
in Driving the automatic transmission on
page 96.
To shift in or o ut of pos ition P, you must first
press and hold the brake pedal and then press
the release button in the selector lever handle
while moving the se lector lever to or from P.
You can shift out of this position only with the ignition on .
R-Re verse
Select R only when the vehicle is at a full stop
and the engine is running at idle speed ¢ & in
Driving the automatic transmission on
page 96.
Before you move the selector lever to R, press
both the release button in the handle of the
selector lever
and the brake pedal at the same
time. When the
ignition is on, the backup lights i llu ­
minate when the selector lever is moved into
R .
N -Neutral
The transm iss io n is in neut ral i n this pos ition.
S hi ft to this position fo r standing with the
brakes applied ¢
& in Driving the automatic
transmission on page 96.
When the vehicle is stat ionary or a t speeds
below 1 mph (2 km/h), yo u must always app ly
the footbrake before and whi le moving the
lever o ut of N .
D/S - Normal position for driving forward
In the D/S pos ition, the transmission can be
opera ted ei ther in the norma l mode D or in
the sport mode S . To select the sport mode S,
pull the selector lever back briefly. P ulling the
lever back again will se lect the normal mode
D. The instrument cluster disp lay shows the
selected driving mode.
In the
normal mode D, the transmission auto­
matically selects the suitable gear ratio.
It de­
pends on engine load, vehicle speed and driv­
ing style.
Se lect the
s port mode S for sporty dr iving.
T he vehicle makes full use of the engine's
power. Shift ing may become noticeable when
acce lerating.
When the vehicle is stationary or at speeds below 1 mph (2 km/h), you must always app ly
the foot brake before and while moving the lever to D/S out of N.
A WARNING
Read and follow all WARNINGS ¢ .& in
Driving the automatic transmission on
page 96 .
(D Note
Coasting downhill with the transm ission in
N and the engine not running will result in
damage to the automatic transmission
and possibly the cata lytic conve rter. .,..

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@ Tips
-On vehicles with drive select*, you can
adjust the sporty shift characteristics in
the
Dynamic driving mode.Swill appear
i n the instrument cluster display instead
ofD.
- If you accidentally select N while driv ing,
take your foot off the acce lerator pedal
i mmediately and wait for the engine to
s low down to idle before selecting D/S.
- If there is a power failure , the selector
l ever will not move out of t he P position .
The eme rgency release can be used if
th is happens ~
page 100.
Automatic Shift Lock (ASL)
Applies to vehicles: with multitronic/5 tronic/tiptron ic
The Automatic Shift Lock safeguards you
against accidentally shifting into a forward or
the reverse gear and causing the vehicle to
move unintentionally.
F ig. 10 7 Sh ift gate: selecto r lever lock posit io ns and
release butto n highlighted
The selector lever lock is released as fo llows:
... Turn the ign ition on .
... Step on t he brake pedal.
At the same time
press and hold the release button on the
side of the gea r se lector knob ¢
fig. 107
with yo ur t hu mb until you have moved the
sele ctor lever to the des ired position .
Automatic selector lever lock
The selector lever is locked in the P and N po·
sitions when the ignition is turned on . You
must press the brake pedal and the release
button to select another posi tion. As a re·
m inder to the driver, the fo llow ing warning
Transm ission 95
appears in the ins trument cluster display
whe n the selector is in P and N:
When stationary appl y brake pedal while se ­
lec ting gear
The Automatic Shift Lock only funct ions when
the ve hicl e is stationary or at speeds be low
1 m ph (2 km/h) .
At speeds above about 1 mph (2 km/h) the
Automat ic Shift Lock is automatically deact i­
vated in the N position .
A time delay element prevents the selector lever from lock ing when it is moved through
the N pos ition (going from R to D/S) . The lock­
ing element w ill lock t he selec to r l ever if the
lever is left in N (Neutr al) for more than ap­
proximate ly 2 seconds, wi tho ut the brake ped­
al being pressed.
Release button
The release button on the se lector lever pre­
vents the lever from be ing acciden tally shifted
in to certa in positions. Depending on the d irec­
t ion of the shift, the sele ctor leve r locks at dif­
ferent positions. The positions are highlig hted
in the illust ration¢
fig . 107.
Ignition key safety interlock
T he key cannot be removed from the ign ition
u nless the selector lever is in the P par k posi­
tion . When the ignit ion key is removed, the
selector lever will be loc ked in the P position .
Driving the automatic transmission
Applies to vehicles; with mult itronic/S tronic/tiptronic
Fig. 108 Sh ift gate on the ce nter console: selector lev-
er w it h re lease butto n ..,_