cooling AUDI Q3 2015 User Guide

M N
M N
0 ::i co ,...., \!) ..,.,
,...., ..,., ,....,
level should be between the "MIN" and
"MAX" markings. When the engine is warm,
the level may be slightly above the "MAX"
marking .
The location of the coolant expansion tank
can be seen in the engine compartment illus­
tration
<=> page 181.
To obtain an accurate reading , the engine
must be switched
off.
The expansion tank in your vehicle is equipped
with an electric coolant level sensor.
When the coolant level is too low, the warning
light in the Auto-Check System <=>
page 14 will
blink until you add coolant and the level has
been restored to normal. Even though there is
an electric coolant level sensor, we still rec­
ommend you check the coolant level from
time to time.
Coolant loss
Coolant loss may indicate a leak in the cooling
system. In the event of coolant loss, the cool­
ing system should be inspected immediately
by your authorized Audi dealer.
It is not
enough merely to add coolant.
In a
sealed system, losses can occur only if
the boiling point of the coolant is exceeded as
a result of overheating.
A WARNING
The cooling system is under pressure and
can get very hot. Reduce the risk of scald­
ing from hot coolant by following these
steps.
- Turn
off the engine and allow it to cool
down.
- Protect your face, hands and arms from escaping fluid and steam by covering the
cap with a large, thick rag .
- Turn the cap slowly and very carefully in
a counter-clockwise direction while ap­
plying light, downward pressure on the
top of the cap .
- To avoid being burned, do not spill anti­
freeze or coolant on the exhaust system
Checking and filling 187
or hot engine parts. Under certain condi­
tions, the ethylene glycol in engine cool­
ant can catch fire.
([) Note
Do not add any type of radiator leak seal­
ant to your vehicle's engine coolant. Add- ing radiator repair fluid may adversely af­
fect the function and performance of your
cooling system and could result in damage
not covered by your New Vehicle limited
Warranty .
Adding coolant
Be very careful when adding engine coolant.
Before you check anything in the engine com­
partment ,
always read and heed all WARN­
INGS <=>
A in Working in the engine compart­
ment on page 179 .
Requirement: There must be a residual
amount of coolant in the expansion tank
<=> (D.
.,. Turn off the engine.
.,. Let the engine cool down.
.,. Place a thick rag over the coolant expansion
tank
<=> page 186, fig . 148 and carefully turn
the cap counter-clockwise
<=> .&_ .
.,. Add coolant mixed in the correct ratio
<=> page 186, Coolant up to the MAX mark­
ing.
.,. Make sure that the fluid level remains sta-
ble. Add more coolant if necessary.
.,. Twist the cap on again
tightly.
Replacement engine coolant must conform to
exact specifications
<=> page 186, Coolant.
We recommend using only coolant additive
G12 ++, G13 or in an emergency G12 +. Do
not
use a different additive. In an emergency use
plain water until you can get the correct addi­
tive and can restore the correct ratio. This
should be done as soon as possible.
If you have lost a considerable amount of
coolant , then you should add cold antifreeze
and cold water only when the engine is cold.
Always use
new engine coolant when refilling . .,.
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188 Checking and filling
Do not fill coolant above the "MAX" mark. Ex­
cess coolant will be forced out through the pressure re lief valve in the cap when the en ­
g ine becomes hot.
A WARNING
- The coo ling system is under pressure and
can get very hot. Reduce the risk of
scalding from hot coolant by following
these steps.
- Turn
off the eng ine and a llow it to cool
down.
- Protect your face, hands and arms from
escaping fluid and steam by covering
the cap with a large, thick rag.
- Turn the cap slowly and very ca refully
i n a co unte r-clockwise d irection while
apply ing light, downward press ure on
the top of the cap.
- To avoid being burned, do not spi ll an ­
tifreeze or coolant on the exhaust sys­
tem or hot engine parts. Under certa in
conditions, the ethylene glyco l in en­
g ine coolant can ca tch f ire.
- Antifreeze is poisonous. Always store an­
t ifreeze in its original container and we ll
o ut of the reac h of children.
- If you drain the coolant, it must be
caught and safely stored in a p roper con­
ta iner clear ly ma rked "poison".
(D Note
- Do not add coolant if the expansion tan k
i s empty. A ir could enter the cooling sys­
tem and damage the eng ine. If this is
the case, do not continue driving. Seek
professional assistance.
- Coolant po llutes the e nv ironment and
could cause an engine fire. Excess coo l­
ant will be forced ou t through the pres ­
su re re lief v alve in the ca p when the en­
gine becomes hot .
- If, in an emergen cy, only water can be
added, the corre ct ratio be twee n wa te r
and antifr eeze¢
page 186 must be re ­
stored as soon as possib le .
{® For the sake of the environment
D rained coo lant should not be reused . A l­
ways d ispose of used coolant whi le observ­
i ng a ll environmental regulations.
Radiator fan
The radiator fan switches on automatically by
itself
T he rad iator fan is driven by the engine v ia the
V-belt. The viscous clutch regulates the spee d
of the fan acco rding to the temperature of the
coolant.
An a uxiliary electric radiator fan* sw itches on
and
off depending on coolant temperature
and othe r vehicle ope rat ing condit ions .
A ft er yo u sw itc h t he eng ine
off, the aux iliary
f an can continue running for up to 10 m inutes
- even wit h the ignition
off. It can even switc h
on again later by itself¢.&. , if
- t he tempe rature of the engine coo lant rises
due to the heat build -up from the engine in
the engine compa rtment, or
- the engine compa rtment heats up because
the vehicle is parked in i ntense sunlig ht.
A WARNING ~
- To reduce the risk of perso na l inj ury nev -
er touch the radiator fan.
- The a uxiliary electric fan is tempe rat ure
contro lled and can sw itch on sud denly
even when the engine is not running.
- The a uxiliary radiator fan sw itches on a u­
tomatically when the engine coo lant
reac hes a certa in temperature and will
continue to ru n until the coolant temper­
ature drops.

24 4 Index
Tether anchors ... ..... ... .. .. .... . 149
Tether straps . . . . . . . . . . . . . . . . . . . . . 149
Chi ld safety loc ks
Power windows ........ .. .. .. .. .. ..
37
Rear doors .............. .. .. .... .. 36
Ch ild safety seats ............... ....
139
Booster seats . . . . . . . . . . . . . . . . . . . . . 14 1
Conve rtible child seats ............. 140
Convertible locking retrac to r .. .. .... . 143
Danger of using c hild restra ints in the
front sea t .. ..... ..... ... .. .. .... .
114
How do I properly install a child safety
seat in my vehicle? ..... ... .. .. .... . 136
Infant seats ............. .. .. .. .. .
139
Install ing ................. .. .... . 143
LATCH system ............. .... .... 148
Lower anchorages ......... .... .... 147
Safety instructions ............ .. ... 136
Unused safety belts on the rea r seat ..
138
Cigarette lighter . . . . . . . . . . . . . . . . . . . . . 53
C leaning ..... .. .. ..... ... .. .. .... . 170
Climate control . . . . . . . . . . . . . . . . . . . . . . 63
C lock . .. .. .. ............. .. .. .. ... .
23
C losing
Panorama s unroof ........ .... .... .. 38
Power windows .. ..... ... .. .. .... ..
37
C losing/open ing
at the lock cylinde r ...... .. .. .. .. .. .. 33
b y remote con trol . . . . . . . . . . . . . . . . . .
30
with the cen tral locking switch .. .... .. 32
wi th the convenience key . . . . . . . . . . . . . 31
Cold tire inflat ion pressu re . ... .... ....
199
Com ing home ............... .. .... .. 42
Compact spare tire .................. 217
also refer to Spare tire ... .. .. .. .. .. . 21 7
Compartments ................. ..... 56
Compass in the mirror . ... .. .. .. .. .. ..
48
Compl iance ............... .. .. .. .. . 24 0
Computer
refer to Trip computer . . . . . . . . . . . . . . . 22
Consumer Info rmation . . . . . . . . . . 101, 237
Contac ting N HTSA .................. 101
Controls
Clean ing ... ... .... ...... .. .. .. .. .
172
Convenience key
Indicator lights .. .. ... ..... ... .. .. .
70
Starting engine (START E NGINE STOP
button) ... .... .. ............. ..... 68
Stopp ing the engine (START ENGINE
STOP button) . . . . . . . . . . . . . . . . . . . . . . 69
Switch ing on ignition ... ....... ... .. . 68
unlocking/loc king .......... ........
31
Convenience opening/clos ing ..... .. .. . 37
Convertib le child sa fe ty se ats ... .. .. .. 14 0
Co nvertib le locking retractor
Activati ng .... ....................
145
Deact ivat ing ... .. ... .......... .. .. 146
U sing to secu re a child safety seat
1.43, 145
Coolant system . . . . . . . . . . . . . . . . . . . . . 186
Cooling mode (automat ic climate control) 64
Cooling System Expans ion tank ... ............. .... 186
Cruise contro l system
Changi ng speed .................. ..
74
Description . . . . . . . . . . . . . . . . . . . . . . . . 73
Preselect ing speed . . . . . . . . . . . . . . . . . . 7 4
Switch ing off .. .. ... .......... .. .. .
74
swit ching on . .. .. ............. .. ... 74
Cruisi ng range . . . . . . . . . . . . . . . . . . . . . . . 22
(u pholders . . . . . . . . . . . . . . . . . . . . . 55, 56
D
D ata recorde r . . . . . . . . . . . . . . . . . . . . . . 152
Date d isp lay ...... ................ .. 23
Daytime running lights . .. ..... .... . .. . 40
De clarat io n of compliance
Audi s ide ass ist .. ............. .. ..
240
Cell phone package . . . . . . . . . . . . . . . . 2 4 0
Convenience key . ... ... ..... ... .. .. 240
Cruise contro l .... .. .... .... ... .. .. 240
E lectronic immob ilizer .......... .... 240
Remote contro l key . . . . . . . . . . . . . . . . 240
D ecorative p art s/tr im
Cleaning .. .... .. .. ... ..... ... .. ..
172
Defective light bu lb wa rni ng ......... .. 18
Defrost ing (windows) ................ . 65
Dete rm ining co rrec t load limit ........
204
Digital clock . . . . . . . . . . . . . . . . . . . . . . . . 23
Digital compass ... ... .. ..... ... .. .. . 48
D imens ions . ...... ............. .... 2 35

M N
M N
0 ::i co ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Tank system . . . . . . . . . . . . . . . . . . . . . . . 18
Unlocking the fuel filler flap by hand .. 178
Fue l economy messages (efficiency p ro-
g ram) . .. .. .. .... ........... .. .. .... 25
Fue l filler flap
Unlock ing the fuel filler flap by hand
178
Fuses
Assignment ............. .... .. ... 224
Replacing .. ............. .... .. .. . 224
G
Garment hooks . . . . . . . . . . . . . . . . . . . . . . 56
Gas discharge lamps ........ .. .. .. .. . 226
Gauges Eng ine coolant temperature ..........
10
Fuel gauge . . . . . . . . . . . . . . . . . . . . . . . . 11
Tachometer . . . . . . . . . . . . . . . . . . . . . . . 11
General illustration Instruments and controls . . . . . . . . . . . . . 8
Gene rator
War ning/indicato r lights ... .. .. .. .... 15
Glossary of t ire and load ing te rm inology 196
Glove compartment . . . . . . . . . . . . . . . . . . 55
Cooling box . . . . . . . . . . . . . . . . . . . . . . . . 55
GPS controlled clock . . . . . . . . . . . . . . . . . . 23
Gross Veh icle Weight Rat ing (GVWR) ... 234
Ground clearance .......... .. .. .. .. . 165
H
Headlight range contro l system . ... ... . 40
H eadlights
Cle a ning . .. .... ......... .... .. .. .
17 1
Cleaning system ... .... ... .. .. .... .. 4 6
D efective .. .. .. .. .... ... .. .. .. ....
1 8
H eadlig ht range contro l ... .. .. .. .. .. 1 8
High beam assist ................... 41
H ead res traints . . . . . . . . . . . . . . . . . . . . . .
9 7
Ad justing .. ............. .... .. .. .. 9 7
Front sea ts . . . . . . . . . . . . . . . . . . . . . . . . 52
Rear seats . . . . . . . . . . . . . . . . . . . . . . . . . 52
H eated
exterior m irrors .......... .. .. .. .. .. 44
rear window . . . . . . . . . . . . . . . . . . . . . . . 65
seats .... .. ... .. .. ... ... .. .. .. .... 65
windshie ld washer spray nozzles . ... .. 46
H ea ting . .. .. .... ......... .... .. .. .. 63
Inde x 247
Heavy clothing and safety be lts . ... .. .. 107
Hig h beam ........ .. ................ 41
High voltage warning label ........... 234
Hill descent assis t .. ................. 155
Hill descent contro l .. .............. .. 84
Hill ho ld ... .. .. .... . ... ...... ... .. . 72
Hood Open ing
179
Re lease lever .. .. ............. .... 179
Horn ......... ..... .......... ....... 8
How are child rest raint system anchors re-
l ated to chi ld safety .... ............. 146
How many a irbags does my vehicle have?
119
How ofte n should I check my tire pres-
su res? ... .. .. .. .. .. . .. .... ...... .. 202
How safety belt pretens ioners wor k . . . . 110
Hyd rop la ni ng 205
I
Ig nitio n
Ind icator lig ht . .. .... ........... .. .
18
swi tching on/off . . . . . . . . . . . . . . . . . . . . 66
Ig nition key ... .. .. .. . .. .... ...... .. . 29
Ignition lock . ....... . .. .. ..... ... .. . 66
Important t hings to do befo re driv ing .. . 94
Improperly worn safety belts ..........
110
Indicator lig hts .. .. ................. . 11
Airbag system ..... . .. .. ..... ... .. 123
PASSE NGER AIR BAG OF F .... ... .. .. 123
also refer to Warning/ind icator lights . . 11
Infant seats .. .. .. .. ...............
139
Installing child safety seats
Safety be lts . . . . . . . . . . . . . . . . . . . . . . 143
Installing the upper tether strap on the
anchorage .... .. .. ................. 150
Instr uments
Adjusting the light ing .. ..... ... .. .. . 44
Instruments and controls ............. 10
Genera l illustration . . . . . . . . . . . . . . . . . . 8
Interio r lights
Front ..... .. .. .. .. ............... . 43
Rear ... .. .. .. .. .. . .. .... ...... .. . 43
Intermittent (windshie ld wipers) . ... .. . 46
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