warning AUDI A3 2015 Workshop Manual

Starting and stopping
the engine (vehicles
with a convenience key)
St t· th · ith the
button
Applies to vehicles: with convenience key
The I START ENGINE STOPI button switches
the ignition on and starts the engine.
Fig. 66 Cente r console: START ENGINE STOP button
(w ith conven ience key)
You can start your car without using your con­
venience key. You must simply be carrying the
key with you.
Switching the ignition on and off
If the '-r, ij indicator light blinks and the mes­
sage
Please move steering wheel appears
when switching the ignition on, the steering is
locked by the steering lock. In this case, turn
the steering wheel slightly to the left/right.
.. To switch the ignition on or
off, press the
I START ENGINE STOP I button. Do not press
the brake pedal while doing this.
Starting the engine
Your vehicle is equipped with launch control.
The engine starts automatically when you
press the
I START ENGINE STOP I button brief­
ly.
.. Press the brake pedal and move the selector
lev er to the P or N position .
.. Press the
I START ENGINE STOPI button
briefly. The engine will start.
Major electrical equipment switches
off tem­
porarily when starting the engine.
Driving 73
If the engine does not start immediately, stop
the starting procedure by pushing the
I START ENGINE STOP I button again and re­
peat after 30 seconds.
Automatic start malfunction
If the [m ind icator light turns on (gasoline en­
gine) when you start the engine, there is an
automat ic start ma lfunction.
To start the engine, press and hold the
I START ENGINE STOP I button until the engine
runs.
Drive to an authorized Audi dealer or qualified
repair fac ility immediately to have the mal­
function corrected.
_& WARNING
-Never allow the engine to run in confined
spaces -there is a risk of asphyxiation.
- Always take the vehicle key with you
when leaving the vehicle, even for a short period of time . This applies partic­
ularly when children remain in the vehi­
cle. Otherwise the children could start
the engine or operate electrical equip­ ment such as power windows.
- The brake booster and power steering
only work when the engine is running.
If
the eng ine is off, you have to use more
force when steering or braking. Because
you cannot steer and brake as you usual­
ly would, this could lead to crashes and
serious injuries.
(D Note
- Avoid high engine speed, full throttle,
and heavy eng ine load as long as the en­
gine has not reached operating tempera­
ture yet. You could damage the engine.
- Th e engine cannot be started by pushing
or towing the vehicle.
@ For the sake of the environment
Do not let the eng ine run while parked to
warm up. Begin driv in g immediately . This
reduces unnecessary emissions.

74 Driving
(D Tips
-After starting a cold engine, there may
be a brief period of increased noise be­
cause the oil pressure must first build up in the hydraulic valve adjusters. This is
normal and not a cause for concern.
- If the . indicator light blinks in the in­
strument cluster before switching the ig­
nition off, the ignition will not switch on
again
Qpage 189.
-If you leave your vehicle with the ignition
switched on, the ignition will switch off
after a certain amount of time. Make
sure that electrical equipment such as
the exterior lights are switched off.
Turning th n ine off using the
button
Applies to vehicles: with conven ience key
.. Bring the vehicle to a fu ll stop.
.. Automatic transmission: Move the selector
lever into the P position.
.. Press the !START ENGINE STOPI button
Q page 73, fig. 66.
If the engine does not stop, proceed as fol­
lows
q page 75, Starting the engine if there
is a malfunction .
Steering wheel lock1
)
The steering locks when you turn the engine
off using the
I START ENGINE STOP !* button,
move the selector lever into the P position
(automatic transmission*) and open the driv­
er's door.
The locked steering helps prevent vehicle
theft.
Emergency off function
If it is necessary in unusua l circumstances, the
engine can be switched off while the vehicle is
moving at speeds less than 6 mph (10 km/h).
If you press the
I START ENGINE STOP I* but­
ton while driving, the message
Pressing
start/stop button again will switch off en-
l) This function is not availa ble in all coun tries.
gine! appears . To switch the engine off, press
the
I START ENGINE STOP !* button twice in a
row briefly or press and hold for longer than
two seconds.
A WARNING
- Never turn off the engine before the ve­
hicle has come to a complete stop . The
full function of 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
b rake as you usually would, this could
lead to accidents and serious injuries.
- The brake booster and power steering
only work when the engine is running . If
the engine is off, you have to use more
force when steering or braking. Because
you cannot steer and brake as you usual­
ly would, this could lead to crashes and
serious injuries .
- Always take the vehicle key with you
when leaving the vehicle, even for a
short period of time . This applies partic­
ularly when children remain in the vehi­
cle. Otherwise the children could start
the engine or operate electrical equip­
ment such as power windows.
- For safety reasons, you should always
park your vehicle with the selector lever
in P. Otherwise, the vehicle could inad­
vertently roll away.
-After the eng ine has been switched off,
the radiator fan can continue to run for
up to 10 minutes -even with the ignition
switched off. It can also switch on again
after some time if the coolant tempera­
ture rises as the result of a heat buildup or if the engine is hot and the engine
compartment is additionally heated by
the sun's rays.
0 Note
If the engine has been under heavy load
for an extended period of time, heat builds up in the engine compartment after the ..,_

engine is switched off - there is a risk of
damaging the engine. For this reason, let
the engine run for at idle for approximate­
ly two minutes before shutting it off .
(D Tips
-After the engine has been switched off,
the radiator fan can continue to run for up to 10 minutes - even with the ignition
switched off.
It can also switch on again
after some time if the coolant tempera ­
ture rises as a result of heat bui ldup or if
the engine compartment is heated by
sunlight and the engine is hot.
Starting the engine if there is a
malfunction
Appl ies to vehicles: with convenience key
It may not be possible to start the engine un­
der certain circumstances , for example if the
battery in the vehicle key is drained, if inter ­
ference is affected the key or if there is a sys­
tem malfunction.
Fig. 67 Steering col umn/rem ote control key : start ing
th e engin e if th ere is a malfun ctio n
As long as the message y>l) Key not recog­
nized. See owners manual
appears, you can
emergency start your vehicle.
.. Press the brake pedal
9 &. in Starting the
engine with the
S TART ENGINE STOP but­
ton on page 73.
.. Press the l ~s~ T~A~R= T~E~N-G~I~N~E~S~T~O~P~ I button.
.. Hold the master key as shown in the illustra­
tion in the location indicated
y>>) 9 fig. 67 .
The eng ine will start .
.. If the engine does not automatically start,
press the
I STAR T ENGIN E STOP ! button
again.
Driving 75
Drive to an authorized Audi dealer or qualified
repair facility immediately to have the mal­
function corrected .
(D Tips
You can display the message that appears
during an emergency by pressing the
I START ENGINE STOP!* button.
Driver messages
Turn off ignition before leaving car. Battery
is discharging
This message appears and a warning tone
sounds if you open the driver's door when the
ignition is switched on. Turn off the ignition
so that the battery will not discharge.
Pressing start/stop button again will switch
off engine!
This message appears when you press the
!STAR T ENG INE ST OP!* button while driving
¢ page 74, Emergency off function.
Engine start system malfunction. Please
contact Service
The eng ine automatic start system has a mal­
funct ion. Drive to an authorized Audi dealer or
qualified repair facility immediately to have
the malfunction corrected. To start the en­
gine, press and hold the
I STAR T ENG INE ST OP I button.
DI Key not recognized. See owner 's manual
This message appears if there is no conven­
ience key inside the vehicle or if the system
does not recognize the key . The convenience
key may not be recogn ized, for example, if it is
cove red by an object that
disrupts the s ignal
(such as a briefcase), o r if the key battery is
weak . Electronic devices such as cell phones
can a lso interfere with the signal.
To start or stop the engine, see "Correct ing a
malfunction "¢
page 75.
Ill Key not in vehicle?
The Ill indicator light turns on and this mes ­
sage appears if the convenience key was

76 Driving
removed from the vehicle when the engine
was running.
If the convenience key is no lon­
ger in the veh icle, you cannot switch the igni­
tion on or start the engine once you stop it.
You also cannot lock the vehicle from the out­
side .
Press brake pedal
This message appears if you do not press t he
brake peda l to start the engine in a vehicle
with an automatic transmission .
Please engage N or P
This message appears whe n starting or stop­
p ing the engine if t he selecto r lever is not in
the Nor P pos ition. The eng ine will not star t/
stop.
Shift to P, otherwis e vehicle can roll away.
Door s do not lock if lev er i s not in P
This message appears for safety reasons
along w ith a warning tone . It appears if the
selecto r lever for the automat ic transm iss io n
is not in the P position when switch ing the ig­
ni tion off with the
!S TAR T ENGINE STOPI*
button . Sh ift the sele ctor leve r to t he P posi­
tion. Otherwise, the vehicle could ro ll. You al­
so cannot lock the vehicle using the locking
sensor on the door handle o r using the con­
venience key .
Electromechanical
parking brake
Operation
The electromechanical parking brake replaces
the hand brake .
Fig. 68 Center conso le: Park ing brake
.,. Pull the switch @¢ fig. 68 to set the pa rk­
ing brake. The. (USA models) . (Cana­
da mode ls) indicator light in the button and
in the instrument cluster display turns on .
.,. To release the parking brake, press the brake
pedal or the acce lerator pedal and press the
button @. The . (USA models) /. (Cana­
da mode ls) indicato r light in th e button and
ins trument clus ter tur ns off.
Your vehicle is equipped with an electrome ­
chanical pa rking brak e. The parking bra ke is
designed to p revent the veh icle from rolling
u ninte ntionally and repla ce s the hand b rake.
In add ition to the normal functions of a tradi ­
tio na l ha nd b rake, the electromechanical
parki ng b rake provides va rious conven ien ce
and safe ty f unct ions .
When starting
-The integral hill start assist helps you when
d riving by au tomatical ly re leasi ng the park­
ing bra ke ¢
page 77, Starting from a
stop.
- W hen start ing on i nclines, t he h ill sta rt as­
si st preven ts the v ehicl e from unintentiona l­
ly ro lling back . T he b raking force of the
p ar king br ake is no t released unt il su ffi cien t
driving force has been bui lt up at the
wheels .
Emergency brake function
An emergency b rak ing functions ensu res that
t h e vehi cle can be s lowed down even if the
n ormal brakes f ail¢ page 78, Emergen cy
braking fun ction.
Indicator lights
- I f the pa rk ing brake is set when the ignition
is
switched on , the. (USA models) /.
(Canad a models) indica to r li ght turns on in
t he display and b utton .
- If the pa rk ing brake is se t when the ignition
is
switched off , the. (USA models) /.
(Canada mo dels) indica tor ligh t turns on in
the display and button for about 20 sec­
onds.

& WARNING
-Do not press the accelerator pedal inad­
vertently when the vehicle is stationary and the engine is running and a gear is
selected. Otherwise the vehicle will start
to move immediately and could result in
a crash.
- If the power supply fails, the released
parking brake can no longer engage. In
this case, park the vehicle on level ground and secure it by placing these­
lector lever in the P position (automatic
transmission). See your authorized Audi dealer or qualified repair facility.
(D Note
If the symbol . in the display or the indi­
cator light. (USA models)/ . (Canada
models) in the instrument cluster flashes,
there is a malfunction in the brake system.
Please refer to the detailed description of
the indicator lights¢
page 18.
-If the indicator light . (USA models)/
• (Canada models) or
Ill turns on,
there may be a malfunction in the park­
ing brake ¢
page 19.
(D Tips
-You can set the parking brake at any time
-even with the ignition turned
off. To re-
lease the parking brake, the ignition
must be turned on and the brake pedal
must be pressed.
- If driver 's door is opened while the igni­
tion is switched on, the parking brake
sets automatically. This prevents unin­
tended rolling of the vehicle .
- Occasional noises when the parking
brake is set and released are normal and
are not a cause for concern.
- When the vehicle is parked, the parking
brake goes through a self -test cycle at
regular intervals. Any noises associated
with this are normal.
- If there is a power failure, the parking
brake will not set if it is released, and it
will not release if it is set ¢,&. . See your
Driving 77
authorized Audi dealer or qualified repair
facility.
· Parking
.. Press the brake ped al to stop the vehicle .
.. Pull the switch @ ¢
page 76 , fig . 68 to set
the parking brake.
.. Place the selector lever in the P position .
.. Turn the engine off¢.&_ .
.,. Turn the steering wheel when parking on in­
clines so that the wheels will roll into the
curb if the vehicle starts moving.
& WARNING ~ -
-Always take the vehicle key with you
when leaving the vehicle, even for a short period of time. This applies partic­
ularly when children remain in the vehi­
cle. Otherwise children could start the
engine, release the parking brake or op ­
erate electrical equipment such as power
windows, which increases the risk of an
accident .
- No one should remain in the vehicle
when it is locked, especially children.
Locked doors make it more difficult for
emergency workers to get into the vehi­
cle, which puts lives at risk.
Starting from a stop
The start assist function ensures that the
parking brake is released automatically upon starting.
Stopping and applying the parking brake
.. Pull the switch@¢ page 76, fig . 68 to set
the parking brake.
Starting and automatically releasing the
parking brake
Requirement: The driver's door must be
locked and the driver's safety belt must be
fastened.
.. When you press the accelerator pedal , the
parking brake is automatically released and
your vehicle begins to move.
•

78 Driving
When stopping at a traffic signal or stopping in city traffic, the parking brake can be ap­
plied. The vehicle does not have to be held
with the brake pedal. The parking brake elimi­ nates the tendency to creep when a selector
lever position is engaged . As soon as you
press the accelerator pedal, the parking brake
releases automatically and the vehicle starts
to move.
Starting on slopes
When starting on inclines, the hill start assist
prevents the vehicle from unintentionally roll­
ing back. The braking force of the parking
brake is not released until sufficient driving
force has been built up at the wheels.
(D Tips
For safety reasons, the park ing brake is re­
leased automatically only when the driv­
er 's safety belt is fastened and the driver 's
door is locked.
Emergency braking function
This is used if the convention brake system
fails or locks up.
~ To brake your vehicle in an emergency, pull
the @switch
¢ page 76, fig. 68 and hold it
pulled.
~ As soon as you release the@ switch or ac-
celerate, the braking process stops.
Pulling and holding the @switch while driv­
ing at a speed of about 2 mph (3 km/h) or
higher initiates the emergency braking func­
tion. The vehicle is braked at all four wheels by activating the braking hydraulics. The brake
performance is similar to heavy braking.¢.&
To help prevent activating the emergency braking by mistake, an audible warning tone
(buzzer) sounds when the @switch is pulled.
E mergency braking stops as soon as the@
switch is released or the accelerator pedal is pressed.
A WARNING
Emergency braking should only be used in
an emergency, when the normal brake
pedal has failed or the brake pedal is ob­
structed . During emergency braking, your
vehicle will brake similar to heavy braking .
ESC and the associated components (ABS,
ASR, EDL) cannot overcome the laws of
physics. In corners and when road or
weather conditions are bad, a full brake
application can cause the vehicle to skid or
the rear end to break away, which increas­
es the risk of an accident.
Hill hold
Applies to vehicles: wit h Hill Hold
Hill hold makes it easier to start on hills.
Requirement: The driver door must be closed
and the engine must be running.
The system is activated when the brake pedal
is pressed while the vehicle is stationary.
To prevent the vehicle from rolling back when
starting, the brake power is held for a brief
moment after releasing the brake pedal. Dur­
ing this time, you can easily begin to move
your vehicle.
A WARNING ......_
- The intelligent technology of Hill Hold
cannot overcome the limitations im­
posed by natural physical laws. The in­
creased comfort offered by Hill Hold
should not cause you to take safety risks .
- Hill Hold cannot hold the vehicle in all
hill start situations (for example, if the
ground is slippery or icy).
- If you do not begin moving immediately
after releasing the brake pedal, the vehi­
cle could begin to roll backward under
certain circumstances. Press the brake
pedal or set the parking brake immedi­
ately.
- If the engine "stalls", press the brake
pedal or set the parking brake immedi­
ately.
-

-Starting on inclines in stop-and-go traf­
fic: To help prevent the vehicle from roll­
ing back when starting, press and hold
the brake pedal for several seconds when
the vehicle is stationary .
(D Tips
You can find out if your vehicle is equipped
with Hill Hold by checking at an authorized
Audi dealer or qualified repair facility .
Speed warning system
Introduction
The speed warning system helps you to stay
under a specified maximum speed.
The speed warning system warns you if you
are exceeding the maximum speed that you
have set. You will hear a warning tone when
your speed exceeds the stored value by ap­ proximately 3 mph (3 km/h). An indicator
light . (USA models) . (Canada models) in
the instrument cluster display also turns on at
the same time. The indicator light./.
turns
off when the speed decreases below the
stored maximum speed .
Setting a threshold is recommended if you
would like to be reminded when you reach a
certain maximum speed. Situations where you may want to do so include driving in a country
with a general speed limit or if there is a
specified maximum speed for winter tires .
@ Tips
Even though your vehicle is equipped with
a speed warning system, you should still
watch the speedometer to make sure you
are not driving faster than the speed limit.
Setting the threshold
You can set, change and delete the threshold
in the MMI.
"' Select: Systems or Car systems > Driver as­
sist> Speed warning .
Driving 79
You can set any threshold between 20 mph (30 km/h) and 150 mph (240 km/h). Settings
can each be adjusted in increments of 6 mph
(10 km/h).
Cruise control system
Description
Applies to vehicles: with cruise control system
The cruise control system makes it possible to
drive at a constant speed starting at 15 mph
(20 km/h).
The speed is kept constant by modifying en­
gine power or through an active brake inter­
vention.
.&_ WARNING ~
- Always pay attention to the traffic
around you when the cruise control is in
operation. You are always responsible for
your speed and the distance between
your vehicle and other vehicles.
- For reasons of safety, cruise control
should not be used in the city, in stop­
and-go traffic, on winding roads and
when road conditions are poor (such as ice, fog, gravel, heavy rain and hydro­
planing) -you could have an accident.
- Switch the cruise control
off temporarily
when driving in turning lanes, highway
exits or in construction zones.
- Please note that unconsciously "resting"
your foot on the accelerator pedal pre­
vents the cruise control from braking.
This is due to the control system being
overridden by the driver's acceleration.
- If a brake system malfunction such as
overheating occurs when the cruise con­
trol system is switched on, the braking
function in the system may be switched
off. The other cruise control functions re­
main active as long as the indicator light
II (US models) !l'I (Canadian models)
ison.
~ •

A WARNING ,~
You should only resume the stored speed if
it is not too high for existing traffic condi­
tions . Otherw ise you risk an accident.
- If the brakes become too heated while
driving, the cruise control switches off. If
th is happens while dr iving downh ill, you
can relieve the brakes by shifting into a
lower gear.
- When the cruise control is act ivated, ESC
sport mode cannot be switched on . Driving 81
•

82 Audi adaptive cruise control
Audi adaptive cruise
control
Introduction
Ap plies to vehicles: with Audi adaptive cruise co ntrol
The adaptive cruise control system is a combi­
nation of speed and distance regulation. It as­
sists the driver by both regulating the speed
and maintaining a distance to the object
ahead, within the abilit ies of the system. If
the system detects an object, adaptive cruise
con trol can brake and accelerate your vehicle.
This together with the automatic transmis ­
sion* makes driving more comfortable both
on long stretches of highway and in stop-and­
go traffic.
General Information
General information
A ppl ies to vehicles: with Audi adaptive cruise co ntrol a nd
Audi pre se nse fro nt
Fig. 70 Vehicle fro nt: sensor
The general information applies to adaptive
cruise control* and pre sense front*
c:>page90.
The radar sensor area c:>fig. 70 must not be
covered with stickers, deposits or any other
obstructions as it may impair the function of
the adaptive cru ise control and the pre sense
front. For information on cleaning, see
c:> page 201 . The same applies for any modifi­
cations made in the front area .
The function of the adaptive cruise control
system and pre sense front is limited in some
conditions: -
Objects can only be detected when they are
within the sensor range
c:> page 84,
fig. 73.
-The system has a limited ability to detect
objects that are a short distance ahead, off
to the side of your vehicle or moving into
your lane.
- Objects that are difficult to detect such as
motorcycles, vehicles with high ground
clearance or an overhanging load are detect­
ed late or not detected at all.
- When driving through curves
c:> page 83.
-With stationary objects r=;, page 83 .
A WARNING
-
Always pay attent ion to traffic when adap­
tive cruise control is switc hed on and the
pre sense front is active
c:> page 90. As
the driver, you are still responsible for
start ing and for maint.;1 ining speed and
distance to other objects. The pre sense
front is used to assist you. The driver must
always take action to avoid a collision. The
driver is always responsible for braking at
the correct time.
- I mp roper use of adaptive cruise con trol
can cause collisions, other accidents and
serio us personal injury.
- Incorrect use of the adaptive cruise con­
trol can cause collisions, other acc idents
and serio us personal injury.
- Incorrect use of the adaptive cruise con­
trol can cause collisions, other accidents
and serio us personal injury.
- For safety reasons, do not use adaptive
cru ise control when driv ing on roads with
many curves, when the road surface is in
poor condition and/or in bad weather
(such as ice, fog, gravel, heavy ra in and
hydroplaning). Us ing the system under
these conditions could result in a colli­
sion .
- Sw itch adaptive cruise contro l off tempo­
ra rily when driving in turning lanes, on
expressway ex its or in construction
zones. This preven ts the vehicle from ac­
celerating to the set speed when in these
situations .

.. Automa tic transmission: To activate the reg ­
ulation while stationary , you must press the
brake pedal.
Switching adaptiv e cruise control off
.. Push the lever away from you into position
@ until it cl icks into p lace. The message
A CC: off appears.
The stored speed in the L ED line is erased.
@ Indicato r lights
II -adaptive cruise contro l is switched on . No
objects are detected ahead. The sto red speed
is ma inta ined .
• -An object ahead was detected . The adap­
tive cruise control system regulates the speed
and distance to the object ahead and brakes/
accelerates automatica lly.
fai -Automatic transmission: The adapt ive
cr uise control is switched on . An object ahead
was detected. Your vehicle remains stopped
and will not start driving automatically .
• -The automatic brak ing is not eno ugh to
maintain a sufficient d istance to an object
ahead . Yo u must intervene
¢ page 88, Re­
quest for driver intervention.
© Instrument cluster display
I f adap tive cruise contro l is not shown in the
instr ument cluster disp lay, you ca n call it up
using the mu ltifunction steering wheel but ­
tons
¢ page 2 7 .
B ased on t he g raphics in the display, you can
dete rmine if the system is maintaining a dis­
tance to a veh icle ahead and what that dis ­
tance to this vehicle is:
N o vehicle -No object ahead was detec ted .
White vehicle -An object ahead was detected .
Red vehicle -Request for the dr iver to take ac­
t ion ¢
page 88 .
Both arrows on the scale © indicate the dis­
tance to the object ahead. No arrow appears
when the vehicle is on an open road and there
Audi ad apti ve crui se control 85
is no object ahead. If an object is detected
ahead, the ar row moves on t he scale.
T he green zone on t he sca le indicates the
store dis tance . Fo r informa tion on chang ing
the distance, refe r to ¢
page 87. If the dis ­
tance selected is exceeded or not reached, the
arrow moves into the red zone on the scale.
_& WARNING
Improper use of the adaptive cruise con­
trol can cause collisi ons, other accidents
a nd se rious personal injur ies.
- Automatic transmission: If you press the
ISETI butto n when dr iv ing at speeds be­
low 20 mph (30 km/h) , the veh icle accel ­
erates au tomatically up to 20 mph
(30 km/h), which is the mi nimum speed
th at can be set.
{i) Tips
- If you switch the ignit ion or the adaptive
cruise cont rol system off, the set speed
is e rased fo r safety reason.
- With the adaptive cruise control activat­
ed the ESC spo rt mod e cannot be activat­
ed.
- The e lectronic stab ilizat ion cont ro l (E SC)
and the anti-slip-regulat ion (ASR) are a u­
t oma tic a lly turned on w hen the adapt ive
c ruise cont ro l is turned on. Bot h sys tems
canno t be turned off if the a daptive
cruise cont rol is turned on .
Changing the speed
Applies to vehicles: with Audi adaptive cru ise control
0
f
jJ
0
Fi g. 76 Operat ing leve r: c ha ng in g the spee d
0)
"' 0 i.
" a,