2015 AUDI A3 CABRIOLET radiator

78 Driving
Stopping the engine with the key
A pplies to vehicles: with mechanical ignit ion lock
Stopp ing the engine
> Bring the vehicle to a ful l stop .
> Turn the key to position @.
Rele asing the steering lock
Requirement : The selector lever must be in
the P pos ition .
> Remove the ignit ion key in position @
Q page 78, fig. 80 Q _&.
> Turn the steering wheel until you hear the
stee ring wheel lock.
The locked steering helps prevent vehicle
theft.
A WARNING
- Never turn off the eng ine before the ve­
hicle has come to a complete stop . The
full function of the brake booster and the powe r steering is not guaranteed. You
must use more fo rce to turn or brake, if
necessary. Because you cannot steer and
brake as you usually would, this could
lead to acc idents and se rious injuries.
- Never remove the ign ition key from the
ign ition lock whi le the vehicle is movi ng .
Otherwise, the steering lock co uld sud­
denly engage and you would not be able
to steer the vehicle.
- Please note that the brake booster and
power steering only work when the en­
gine is runn ing. When the engine off, you
must use more force to steer or brake
the vehicle. Because t he usual steering
and braking capability is not available,
the risk of accidents or injuries increases .
- Always take the vehicle key with you
when leaving the veh icle, even for a
short per iod of time. This applies partic­
ularly when chi ldren remain in the vehi­
cle. Otherwise the children could start
the engine or operate electrical equip ­
ment such as power windows .
- For safety reasons, always park the vehi­
cle with the selector lever in the P posi- tion. Otherwise, there is the risk t
hat the
veh icle could roll.
- After the engine has been switched off,
the radiator fan can continue to run for
up to 10 minutes -even with the ignition
sw itched off. It can also sw itch on again
after some t ime if the coolant tempera­
ture rises as a resu lt of heat buildup or if
the engine compartment is heated by
sunlight and the engine is hot.
(D Note
- If the engine has been under heavy load
for an extended per iod of t i me, heat
builds up in the engine compartment af­
ter the engine is switched off - there is a
r isk of damaging the engine . For this
reason, let the engine r un for at id le for
approximately two minutes before shut ­
ting it off .
Starting and stopping
the engine (vehicles
with a convenience key)
St t· th · ith the
button
Appl ies to vehicles: wit h co nvenience key
The !START E NGIN E STOPI button switches
the ignition on and starts the engine .
Fig. 80 Center conso le: STAR T ENGIN E STOP bu tton
(w ith co nvenie nce key)
You can start your car without using your con­
venience key. You must s imply be carrying the
key with you. .,._

80 Driving
Steering lock1
)
The steering locks when you turn the engine
off using the
I START ENGINE STOPI* button,
move the selector lever into the P position
and open the driver's door.
The locked steering helps prevent vehicle
theft.
Emergency off function
If it is absolutely necessary, the engine can al­
so be turned off while driving at speeds lower
than 6 mph (10 km/h).
If you press the
I START ENGINE STOPI* button while driving,
the message
Pressing start/stop button
again will switch off engine!
appears. To
switch the engine off, press the
I STAR T ENGINE STO PI* 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
brake as you usually would, this could
lead to accidents and serious injuries .
- Please note that the brake booster and
power steering only work when the en­
gine is running. When the engine off, you
must use more force to steer or brake
the vehicle. Because the usual steering and braking capability is not available,
the risk of accidents or injuries increases.
- 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, always park the vehi­
cle with the selector lever in the P posi-
ll This function is not available in all cou ntr ies.
tion. Otherwise, there is the risk that the
vehicle could roll.
- 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 buildup or if
the engine compartment is heated by sunlight and the engine is hot.
(D 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.
Starting the engine if there is a
malfunction
Applies 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. 81 Steer ing colum n/remote control key : start ing
the e ngine
if t h ere is a malfu nction
As long as the message y>l) Key not recog­
nized. See owners manual
appears, you can
sta rt your vehicle using the emergency start
function . .,.

M N ,....
> co ,...., \!) 1.1"1 ,...., 1.1"1 ,....,
Parking systems
General information
Appl ies to vehicles: with rea r parking sys te m s/park ing
system pl us/rearv iew camera
Depending on your vehicle's equipment, vari­
ous parking aids w ill help you when parking
and maneuvering.
The
r ea r p arking sys te m is an audible parking
aid that warns you of obstacles
behind the ve­
hicle
~ page 120 .
T he
p ar kin g syste m plus assists you when
parking by audibly and visually indicat ing ob­
jects detected
in front of and behind the vehi­
cle
~ page 120.
T he
re ar view came ra shows the area behind
the veh icle in the MMI display . This display as­
sists you when you are cross or para llel park­
ing. The park ing system plus functions are al­
so available
r::!;> page 121.
A WARNING ,-
- Always look for traff ic and check the area
around your vehicle by looking at it di­
rectly as well. The parking system cannot
replace the driver 's attent ion. The driver
is always respons ible when entering or
leaving a parking space and during simi­
lar maneuvers .
- Please note that some surfaces, such as
clothing, are not detected by the system .
- Sensors and cameras have blind spots in
wh ich people and objects cannot be de­
tected . Be especially cautious of small
children and animals.
- Always pay attention to the area around
the vehicle -using the rearview mirror,
too .
- The sensors can be displaced by impacts
or damage to the radiator grille, bumper ,
wheel housing and the unde rbody . The
par king system may become impai red as
a result. Have an authorized Aud i dealer
or authorized Audi Service Facility check
their function .
Parking system s 119
-Make sure the sensors are not obstructed
by st ickers, deposits or other materials.
If they are, the sensor function could be impaired. For additional information on
cleaning, refer to~
page 204 .
(D Note
-Some objects are not detected or dis­
played by the system under certain cir­
cumstances:
- Objects such as ba rrier chains, trailer
draw bars, vertical po les or fences
- Objects above the senso rs such as wall
extensions
- Objects w ith specific surfaces or st ruc­
tures such as chain link fences or pow­ der snow
- If you continue d riving closer to a low-ly­
ing object, it may disappear from the
sensor range . Note that you wi ll no lon­
ger be warned about this obstacle.
- T he sensors can be displaced by impacts
or damage to the radiato r grille, bumper,
wheel housing and the underbody. The park ing system may become impaired as
a result. Have an authori zed Audi dealer
or authorized Audi Service Facility check
their function .
{!) Tips
- The system may provide a warning even
though there are no obstacles in the cov­
erage area in some situations, such as:
- certain road su rfaces or for long grass.
- externa l ult rason ic sources e.g. from
clean ing vehicles.
- heavy ra in , snow, or thick vehicle ex­
haust.
- We recommend that you practice park­
ing in a traff ic-free location or par king
lot to become familiar w ith the system.
When doing this , the re should be good
light and weather cond itions.
- Yo u can change the vo lume and pitch of
the signals as we ll as the disp lay
r::!;> page 125.

214 Check ing and F illin g
•Pullon the cover carefu lly ¢ fig. 162. The
tab on the cover must point forward in the direction you are pulling when pu lling on
the cover.
• To open the fuel filler door, press on the left
side
¢ page 212, fig . 160 .
{Q) Note
Only pull on the cover unt il you feel resist­
ance. You will not hear it release . Other­
w ise you could damage the emergency re­
lease mechanism.
Hood
Working in the engine compartment
Special care is required if you are working in the engine compartment
F o r w ork in th e eng in e c omp artm ent su ch as
c h ecking and fi llin g fluid s, t he re i s a risk of
inj ury, sca lding, accid ents, a nd b urn s. Fo r
thi s re aso n, follow all the follow in g listed
war ning s and ge neral safety p recaution s.
T he engine compartment is a d ang ero us
area. ¢,& .
A WARNING
To reduce the risk of injur ies, complete the
following steps before opening the hood:
- Turn the engine off.
- Switch the ignition off.
- Set the parking brake.
- Place the selector lever in the P position .
- Let the engine coo l down.
- Never open the hood when you see that
steam o r coolant drips from the engine
c ompartment- there is a danger of
burns! Wait until no steam or coolant
flows out.
- Keep chi ldren away from the engine com­
partment.
- Never spill flu ids on a hot eng ine. These
fluids (such as the freeze protection con­
tained in the coolant) can catch fire .
- Avo id short circuits in the electrical sys­
tem, especially the battery . -
When working in the engine compart­
ment, remember that the radiator fan
can switch on even if the ignition is
sw itched off, which increases the risk of
personal injury.
- Never open the cap on the coolant ex­
pans ion tank when the eng ine is warm.
The cooling system is unde r pressure.
- To protect your face, hands, and arms
from hot steam or coolant, cover the cap
with a large cloth when opening .
- Do not remove the engine cover under any circumstances. This increases the
risk of burns .
- If tests need to be performed with the engine runn ing, there is add itiona l dan­
ge r due to moving components (such as
the ribbed belt, generator and radiator
fan) and from the high voltage ignit ion
system.
- Never reach into the radiator fan. The
electric auxilia ry fan is controlled by
temperature and can switch on sudden ly .
- Pay attention to the fo llow ing warnings
listed when work on the fuel system or
on the e lectrica l equipment is required.
- Always disconnect the vehicle battery
from the vehicle e lectr ical system
- Do not smoke
- Never work near open flames
- Always have a working fire exting uisher
nearby
- To reduce the risk of electric s hock and
inj ury, never touch the fo llowing compo­
nents when the engine is running or is
be ing started :
- Ig nition cable
- Other compone nts in the electronic
high voltage ign it ion system
- If you must check or perform work on the eng ine while it is runn ing:
- Set the parking brake and place these­
lector lever in the P (park) position
first.
- Always proceed with extreme caution
so that clot hing, jewe lry or long hai r do
not become caught in the radiator fan, ..,.

220 Check ing and F illin g
Never mix oil additives with your engine
oil. These additives can damage your en­
gine and adversely affect your Audi Limit­
ed New Vehicle Warranty.
@) For the sake of the environment
- Before changing your oi l, f irst make sure
you know where you can properly dispose of the used o il.
- Always dispose of used engine oil proper­
l y. Do not dump it on garden so il, wood­
ed areas, into open streams or down
sewage dra ins.
- Recycle used engine oil by taking it to a
used engine oil collection facility in your
area, or contact a service station .
Cooling system
Coolant
The engine coolant performs two functions: it
keeps the engine from overheating and it pro­ tects the engine from freezing in the winter.
The cooling system is sea led and generally re­
q ui res little attention .
The cooling system has been filled at the fac­
tory with a pe rmanent coolant which does not
need to be changed. The coolant consists of a
mixture o f spec ia lly condi tioned water and the
manufacturer's glycol -based coolant addi -
tive G l3 antifreeze with anticorrosion addi­
tives (50% for USA models ; 60% for Canadian
models). This mixture both assures the neces­
sary frost pro tection and protec ts metal com­
ponents in the engine's cooling system from
corrosion and scaling . It also raises the boil­
i ng po int of the coo lant .
Do not red uce the concentr ation of the coo l­
ant in the summer by adding plain water.
The
proportion of coolant add iti ve mu st be at
least 50 % but not more than 60 %
to main­
tain antifreeze protection and cooling efficie n­
cy.
If t he coolant frost protect io n is too low,
the coo lant cou ld freeze and damage the veh i­
cle heating and engine cooling system. F
or year -ro und driving, antifreeze is added a t
the factory for temperatures down to :
- -31°F(-35°C)USA
- -40°F ( -40°C) Canada.
If you must add coolant, use a mixture of wa­
ter and coolant additive . Mix ing the coo lant
additive with distilled water is recommended .
.&, WARNING "---
Before you c hec k anyth ing in the engine
compartment, a lways read and heed a ll
WAR NIN GS ~
page 214.
0 Note
- Before wi nter sets in, have the coo lant
checked to see if the coolant additive in
your vehicle is sufficient to meet the cli­
ma te conditions. This is especi ally impo r­
tan t if you live in a reg ion where the win­
ter is extreme ly cold . If necessary, in­
crease the p roportion of coo lant add itive
to 60% .
- Whe n adding coolant additive to yo ur
cooling system, remembe r:
- We recommend us ing on ly coola nt ad­
d itive Gl2++ or Gl3 (check the labe l)
fo r your vehicle. This coolant additive is
a va ila ble at au thorize d Au di dea le rs.
Other types of antifreeze can sign ifi­
ca ntly reduce corrosion p rotection. The
resu lting corrosion can cause a loss of
coolant and serious engine damage.
- Do not add any type of radiator leak seal­
ant to yo ur vehicle's engine coolant .
Add ing radiator repair f luid may adverse­
ly affect the function and performance of
your cooling system and cou ld resu lt in
damage not covered by you r New Ve hicle
Limited Warranty.

....,
N
r--. > co
rl I.O
"' rl
"' rl
Adding coolant
Fig. 168 Eng ine co mpa rtme nt: m ark in gs on the cool­
ant expansio n tank
Read and following th e WARNING S before
checking anythi ng in the eng ine compartmen t
c::>page 214.
Checking th e engine coolant leve l
"'Park your vehicle on a level surface .
"' Switch the ign ition off.
"' Read the coo lant level on the coolant expan­
s ion tank
c::> fig. 168. The coolant level must
be between the markings whe n the eng ine
in cold. When the eng ine is warm it can be
slight ly above the upper marking .
Adding coolant
Requirement: There must be a residua l
amo unt of coolant in the expansion tank
c::> (D .
"'Let the engine coo l down .
"' Place a cloth over the coolant expa nsion
tank cap and unscrew the cap counter clock­
wise <=:>
A.
"'Add coolant mixed in the correct ratio
c::>page 220 up to the upper marking.
"' Make sure that the fluid level remains sta-
ble. Add more coolant if necessary.
"' Clove the cap securely.
A coolant loss suggests a leak. Immediately drive your vehicle to an authorized repair fa­
cility and have the cooling system inspected.
If the cooling system is not leaking, a loss can
come from the coolant boiling through over ­
heat ing and being pushed out of the cooling
system.
Che cking and Fillin g 221
A WARNING
The cooling system is pressurized and can
become very hot. To reduce the r isk of
burns from hot coolant:
- Do not open the coolant expansion tank
cap with the engine hot . The re is a risk of
burns .
- Stop the engine and allow it to cool.
- Protect your face, hands and arms from
escaping coolant and steam by covering
the coolant tank cap with a large, th ick
cloth .
- Tu rn the coolant tank cap counterclock­
wise slowly and keep light pressure on
the cap.
- To reduce the risk of burns, do not allow
any antifreeze o r coolant to drip onto the
exhaust system or hot engin e compo­
nents . The ethy lene g lycol in eng ine
coo lant can catch fire under certai n cir­
cumstances.
- The coolan t addi tive and the coolant can
be dangerous to your health. For this
reason, keep the coo lant in the origina l
container away from ch ildren. There is a
risk of poisoning.
- When working in the engine compart­
ment, remember that the radiator fan
can switch on even if the ignition is
sw itched off, which increases the risk of
personal injury.
(D Note
Do not add coolant if the expans ion tank is
empty. Air could enter the cooling system
and damage the eng ine. If this is the case,
do not continue dr iving. See an author ized
Audi dealer or authorized Audi Service Fa ­
c ility for ass istance.
Radiator fan
The radiator fan switches on automatically by
itself.
An auxiliary electric radiator fan switches on
and off depending on coolant temperature
and other vehicle operat ing condit ions .
IJJ,

222 Checking and Filling
After you switch the engine off, the auxiliary
fan can continue running for up to 10 minutes
- even with the ignition off. It can even switch
on again later by itself
c:> .&. , if
- the temperature of the engine coolant rises
due to the heat build-up from the engine in
the engine compartment, or
- the engine compartment heats up beca use
the vehicle is parked in intense sunlight.
A WARNING
- To reduce the risk of personal injury
nev­
er touch the radiator fan.
- The auxiliary electr ic fan is temperature
contro lled and can switch on sudden ly
even when the engine is not running.
- The auxiliary radiator fan switches on au­ tomatically when the engine coolant
reaches a certain temperature and will
continue to run until the coolant temper­
ature drops.
Brake fluid
Checking brake fluid level
N
N
;;;
" 00 co
Fig . 169 Engine compartment : cove r on the brake flu id
r eservoir
Before you check anything in the engine com­
partment,
always read and heed all WARN ·
INGS c:> page 214.
.. Read the brake fluid level from the brake
fluid reservoir
c:> fig.169, c:>poge216 ,
fig. 165.
The brake f luid level must be be­
tween the "MIN" and "MAX" markings.
The location of the brake fluid reservoir can be
seen in the engine compartment illustration
c:> page 216 .
The fluid level may drop slightly after some
time due to the automatic adjustment of the
brake pads . This is not cause for a larm.
If the brake f luid level falls
considerably be ­
low the "MIN" mark, the brake warning/indi­
cator light . (U.S. models)
I. (Canad ian
models) will come on
c:> page 18 . Do not con ­
tinue to operate the vehicle. The complete brake system should be thoroughly checked
by an authorized Audi dealer or other quali ­
fied facility and the cause corrected. If the
brake fluid level is too low, the brake warning/
indicator ligh t will illuminate. Contact an au­
thorized Audi dea ler
immediately.
Changing brake fluid
Have the broke fluid changed by an experi­
enced technician.
Brake fluid absorbs moisture from the air. If
the water content in the brake f luid is too
high, corrosion in the brake system may result
after a period of time. The boiling point of the
brake fluid will also decrease considerably and
decrease braking performance.
T he refo re, the brake fluid must be changed
every two years. Always use new brake fluid
wh ich conforms to Federal Motor Vehicle
Standard "FMVSS 116 DOT 4".
T he brake fluid reservoir can be difficult to
reach, therefore, we recommend that you
have the b rake fluid changed by your author­
ized
Audi dealer. Your dealer has the correct
tools, the right brake fluid and the know-how
to do this for you .
A WARNING
---Brake flu id is poisonous. It must be stor­
ed only in the closed or iginal container
out of the reach of children!
- Brake failure can resu lt from o ld or inap·
propriate brake flu id. Observe these pre·
cautions:
- Us e only brake fluid that meets SAE
specification
J 1703 and conforms to
Federa l Motor Vehicle Standard 116.

290 Index
E
ECO mode (automatic climate control sys -
tem) . ..... .. ................ ..... ..
72
Efficiency program . . . . . . . . . . . . . . . . . . . 28
Description .............. .... .. .. .. 28
Fu el economy messages . . . . . . . . . . . . . 29
Other equipment . . . . . . . . . . . . . . . . . . . 29
Electrical accessor ies
refer to Socket . . . . . . . . . . . . . . . . . . . . . 64
Electromechanical parking brake
refer to Parking brake ......... .... .. 82
Electromechanical steering ....... ... . 192
Indicator lights ................... 192
Electronic diffe rent ial loc k ... .. .. .. .. . 188
Indicator light . . . . . . . . . . . . . . . . . . . . . 21
Electronic immobilizer ...... .... .... .. 36
also refer to Immobilizer . . . . . . . . . . . . 31
Electronic speed limiter . . . . . . . . . . . . . . . 30
Electronic stabilization control (ESC)
I ndicator light . . . . . . . . . . . . . . . . . . . . .
21
Sport mode ................ ..... . 189
Electronic Stabilization Control (ESC) . . . 188
Emergency assistance ....... ... .... . 261
Emergency flasher . . . . . . . . . . . . . . . . . . . 50
Emergency flashers
Indicator light . . . . . . . . . . . . . . . . . . . . .
25
Emergency operation
Emergency braking function .... .... ..
84
Front passenger's door ...... .. .. .. . . 37
Luggage compartment lid .. .... .... . 261
Power top . . . . . . . . . . . . . . . . . . . . . . . . . 45
·th ' k
w1 convenience ey . . . . . . . . . . . . . . . . 80
Emergency release
Fuel filler door ........... .........
213
Selector lever . . . . . . . . . . . . . . . . . . . . . 117
Emergency starting ......... ... .... . 273
Emergency towing ... .. .... .. .. .. .. . 275
Energy management ....... .. .. .. .. . 193
Indicator light . . . . . . . . . . . . . . . . . . . . . 20
Engine
Coolant
.. .. ................ ..... . 220
Starting with jumper cables . ..... .. . 273
starting (button) ............. .... .. 78
Starting (driver messages with conven-
ience key) .. ........ ..... .. ........
81
start ing (key) . .. ...... .... ... .. .. .. 76
stopping (button) ............. ..... 79
stopping (key) ... ................ .. 78
Engine compartment
Closing the hood .............. .. ..
216
Open ing the hood ................. 215
Overview . ..... .. ................ . 216
Safety precautions ............. .... 214
Engine control (indicator light) ...... .. . 22
Engine coolant .. .. ............. .... 220
Radiator fan ... .. ... .......... .... 221
Engine oil . ..... .. ................ . 217
adding ....... .. ................ . 218
Changing ........................ 219
Checking the oil level ............... 218
Dipstick. .. .. .. .. ............ 216, 218
Indicator light . .. ... ......... ... .. . 20
Oil consumption .. ..... ..... ... .. .. 217
Specification and viscosity ... .. .. .. .. 217
Use ...... .... ................... 218
Engine speed limitation (indicator light) . 23
Environment
Break-in period . . . . . . . . . . . . . . . . . . . .
196
Catalytic converter ............. .. .. 197
Disposing of your vehicle battery . .. .. 226
Driving at high speeds ............ .. 198
Driving to minimize pollution and noise 198
Fuel economy . ... ....... ...... .. .. 198
Letting the vehicle stand and warm up. 199
Proper disposal of drained brake fluid . 222
Proper disposal of drained eng ine oil .. 219
Unleaded fuel .... ................ . 210
What should I do with an o ld battery? . 226
EPC (engine contro l) . . . . . . . . . . . . . . . . . . 22
ESC
Automatic post-collision braking sys-
tem .. ... ... .. .. .. ...... ....... ..
189
Electronic stabilizat ion control . .. .. .. 188
Sport mode . .. .. ... ....... ... .. .. 189
Event Data Recorder (EDR) . . . . . . . . . . . . 194
Exterior lighting . .. ... .......... ..... 49
Exterior m irrors
Adjusting . . . . . . . . . . . . . . . . . . . . . . . . .
55
D. . 1mming .. .. ...... .. ... ... ... ..... 56
folding ... ................... ..... 55
Heating . .. ................... .... . 55