cooling AUDI A3 CABRIOLET 2015 User Guide

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,

....,
N
" > co
rl I.O
"' rl
"' rl
No. Equipment Ampere
Door/front passenger's side
F39 doors (for examp le, power
30
windows)
F40 Sockets 20
F41 Reversible front
passenger's
25
side safety belt tensioners
F42 Central locking components,
40
windshield washer system
F43 Headlights, light ing 30
F44 all wheel drive
15
F49 Starte
r, clutch sensor, head-
5
light re lay coil
FS3 Rear window defogger 30
The power seats* are protected v ia
ci rc uit
b reaker s
that automatically sw itch on after a
few seconds after the overload has been re­
duced.
(D Tips
Note that the following table was accurate
at the time of print ing and is subject to
change.
Left engine compartment fuse
assignment
F ig. 193 Engine compartme nt: fuse assignment
No.
Fl
F2
F3
F4
F5
F6
F7
F8
F9
FlO
F ll
F12
Fl3
FlS
F l 6
F l 7
Fl8
F19
F20
F22
F23
F24
F3 1
F32
Fu se s and bulb s 2 71
Equipment Ampere
E5C contro l modu le 40
ESC contro l modu le 40
Engine control module (gas-
15/30
oli ne/d iesel)
Engine cooling, eng ine com-
ponents, auxiliary heater 5/10
coi l relay (1+2), secondary
air injection pump relay
Engine components, tank 7.5/10/
system 15
Brake light sensor 5
Engine components, wa ter 7.5/10/
pumps 15
Oxygen sensor
10/15
Engine compone nts, ex-
haust door, glow time con- 5/10/20
tro l module, SU LEV valve
Fuel injectors, fuel control
15/20
module
Auxiliary heater heating ele- 40
ment 2
Auxilia ry heater heat ing ele-
40
ment 3
Automat ic transmiss ion con-
15/30
t ro l module
Horn 15
Ignit ion coil 5/20
ESC contro l module, engine
7.5
control module
T ermina l 30 (reference volt-
5
age)
Windsh ie ld wipers
30
Horn 10
Termina l 50 diagnosis
5
Starter 30
Auxilia ry heater heat ing ele-
40
ment 1
Vacuum pump 15
L E D head lights 5

M N ,....
> co ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Cockpit (overview) . . . . . . . . . . . . . . . . . . . . 8
Cold tire inflation pressure ............ 235
Coming home ...... ..... .. .... .. .. .. 51
Compartments ............ .... .. .. .. 64
Compass in the mirror ........... .... . 57
Compliance .. .. .............. ... ... 285
Consumer Information . . . . . . . . . . 134, 282
Consumption (fuel) ........ .. .. .. .. .. 27
Contacting NH TSA ............ ... .. . 134
Convenience key Emergency operation . . . . . . . . . . . . . . . . 80
Indicator light ........... .. .. .. .. .. 81
Starting the engine (START ENGINE ST OP
button) .... .. .............. ... .... 78
Stopping the engine (S TART ENGINE
STOP button) . . . . . . . . . . . . . . . . . . . . . . 79
Switching the ignition on .. .. .. .. .. .. 78
unlocking/locking ........ .. .. .. .. .. 34
Convenience opening/closing
Convertible child safety seats
Convertible locking retractor .
. .. .. .. .. 39
176
Activating .. ................. .. .. . 182
Deactivating . . . . . . . . . . . . . . . . . . . . . . 182
Using to secure a child safety seat l80, 182
Coolant
refer to Engine coolant ....... ... .. . 220
Cool ing mode (automatic climate control
system) . .. .. ................. .. .. .. 72
Cooling mode (manual climate control sys-
tem) .. .. .. .. .. ........ ... .. .. .. .. .. 71
Cooling system Adding coolant ........... .... .. .. . 221
Coolant level checking ..... .. .. .. .. . 221
Coolant temperature indicator .. ... ... 12
Indicator light ... .. ...... .. .. .. .. .. 19
Cornering light . ........... .. .. .. .. .. 50
C rash data recorde r (EDR) 188
Cruise control system Changing speed . . . . . . . . . . . . . . . . . . . . 86
Description ............... ... ... ... 85
Preselecting speed . . . . . . . . . . . . . . . . . . 86
Sw itching off . ........... .. .. .. .. .. 86
switch ing on ............. .... .. .. .. 85
Cup holders . . . . . . . . . . . . . . . . . . . . . . . . . 64
Current consumption . . . . . . . . . . . . . 26, 27
Index 289
D
Data recorder . . . . . . . . . . . . . . . . . 188, 194
Date display . . . . . . . . . . . . . . . . . . . . . . . . 10
Daytime running lights ........... .... . 49
Decla rat ion of compliance
Adaptive cruise control . . . . . . . . . . . . . 28S
Audi side assist .... .............. . 285
Cell phone package . . . . . . . . . . . . . . . . 285
Convenience key .... .............. . 285
Electronic immobilizer .......... .. .. 285
Homelink universal remote control . .. 285
Remote control key . . . . . . . . . . . . . . . . 285
Defective light bulb warning
Indicator light ... .. ................ 24
Defrost ing (windshield)
automat ic climate control system . . . . . 73
manual climate control system ........ 71
DEF (instrument cluster) ... .. .... .... . 11
Deluxe automatic climate control
refer to Climate control system (auto-
ma tic) ...... .. .. .. . ............... 72
Determining correct load limit ....... . 245
Digital compass . .. .. . ............ .. . 57
Dimensions . .. .. .. ................. 280
D imming the rearv iew mirror ..... .. .. . 56
Distance ......... .. ..... ........... 27
Door/rear lid warning 26
Door contact sw itch . . . . . . . . . . . . . . . . . . 52
Driver information system .......... .. . 26
CD/radio display .. .. . .. .. .. .... .... . 26
Door/rear lid warning ............... 26
Driver messages . . . . . . . . . . . . . . . . . . . . 13
Efficiency program . . . . . . . . . . . . . . . . . . 28
Ind icator lights .. .... ......... .... . 13
On-board computer ............ .. .. . 27
Outside temperature display . . . . . . . . . . 26
Service interval display . . . . . . . . . . . . . . 13
Using the mu ltifunction steering wheel . 26
Driver seating position ........... .... 127
Drive select
refer to Audi drive select ............ 107
Driving safely 126
Driving through water .. ......... .. .. 197
Driving time
Dust filter 27
refer to Pollutant
filter ............ .. 70
•
•

298 Index
What should I do after replacing wheels? 242
Wheel bo lts
Torque . .. .... ........... ........ . 256
Wheels . .. ................. .. .... . 228
All wheel drive .............. ... .. .
192
Check ing tire pressure .......... .... 240
C leaning . .. ................ ... ... 205
Cold t ire in flat ion pressu re ... .. .. .. . 235
General notes . ............... .... . 228
Glossary of t ire and load ing te rm ino lo-
gy .. .... .. ............ ... .. .... . 230
New tires and wheels .... .. .. .... .. . 248
Tires and vehicle load limits . ....... . 243
Wheel wrench ........... .. .. .. .. .. .
261
When must a safety belt be replaced? .. 141
When must the airbag system be inspect-
ed? ... .. .... .. .. ...... ... ... ..... . 158
When should I ad just the tire p ressu res? 242
When should I check the tire pressures? . 242
Where are lower anchorages located? . ..
184
Where can I find the tire pressures for my
car? ...... ....... ........... ... .. . 240
Why safety belts? ...................
139
Wind deflector .. ... .... ... .. .. .... .. 44
W indows
C leaning/remov ing ice ...... ... .. ... 206
W indshield
cleaning ... ............. .. .. .. ... . 53
defrost ing (automatic climate control
system) .. ................. ...... .. 73
defrost ing (manual climate cont ro l sys-
tem) .. .. .. .. ... ........ .. .. .. .. .. 7 1
also refer to Windshie ld ... .. .. .. .. . . 53
W indshield washer system ............ 53
Reservoir capacity ............ .. ...
280
Washer rese rvoir .......... .... .... 227
Windshield wipers Cleaning wiper blades ..... .... ...... 54
Folding up ............... ..... .. .. 54
Ind icator light . . . . . . . . . . . . . . . . . . . . .
24
Replacing w indshield w iper blades ... . . 54
Sw itching on and off ................ 53
W inter operation
Battery .... ...................... 223
Cooling system ................ .... 220
Winter tires .. ... .. ..... ... .. .. .... . 255
A ll-wheel drive .................... 255 Winter use
Car washes . ..... .. ... ..... ... .. .. 204
defrosting the windsh ie ld (automatic cli­
mate control system) . . . . . . . . . . . . . . . . 73
Removing ice from windows ..... .... 206
Seat heating ..... ................ .. 74
X
Xenon-Lights .... ............... .... 272
Xenon headlig hts . . . . . . . . . . . . . . . .
49 , 52