2015 AUDI Q3 cooling

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Operating instructions
6"
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Fig. 139 Permit ted ball position of the trailer hitch
Trailer towing weights
With a factory-installed or an aftermarket
trailer hitch, the maximum permissible trailer
weight is 2,200 lbs (1,000 kg). The maximum permissible unbraked trailer weight is 1,650
lbs (750 kg) . These specifications apply when
driving on roads having an incline of less than
12%.
Permissible tongue load
For best vehicle handling under these
changed conditions, adjust the trailer load so
that the tongue load is at the maximum al­
lowable or slightly lower . You can get an ap­
proximation of the tongue load with a bath­
room scale or you can measure the load at a
trucking company or weighing station.
With a
factory-installed or an aftermarket
trailer hitch, the maximum permissible load
on the ball hitch may not exceed 220 lbs
(100 kg).
It is recommended to use the maxi­
mum permissible load.
Trailer load distribution
Be sure the load in the trailer is held securely
in place to prevent it from shifting forward,
backward or sideways.
Never allow a passenger to ride in a trailer
¢.&. in Driving instructions on page 168.
Ball mount
The trailer hitch may only be used with suita­
ble ball mount and ball¢
fig. 139. Installa­
tion of the hitch ball must be carried out in ac-
Trailer towing 167
cordance with the manufacturer's instruc­
tions.
Engine cooling system
Towing a trailer makes the engine work hard­
er .
It is important that the cooling system's
performance is up to the additional load.
Make sure that the cooling system has enough
fluid.
Tire pressure
When towing a trailer, inflate the tires of your
vehicle to the cold tire pressure listed under
"Full load" on the tire pressure label. The tire
pressure label is located on the driver's side B­
pillar. Inflate trailer tires to trailer and tire
manufacturers' specifications .
Lights
The headlight settings should be checked with
the trailer attached before driving off. Check
to make sure both vehicle and trailer lights
are working properly.
Safety chains
Be sure trailer safety chains are properly con­
nected from the trailer to the hitch on the ve­
hicle. Leave enough slack in the chains to per­
mit turning corners. When you install safety
chains, make sure they will not drag on the
road when you are driving.
The chains should cross under the trailer
tongue to prevent it from dropping in case of
separation from the hitch.
Driving instructions
Driving with a trailer always requires extra
core and consideration.
To obtain the best possible handling of vehicle
and trailer, please note the following :
.,. Do not tow a loaded trailer when your car it­
self is not loaded.
.,. Be especially careful when passing other
vehicles.
.,. Observe speed limits.
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186 Checking and filling
Engine 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 sealed and generally re­
qu ires little attention .
The cooling system has been filled at the fac­
tory with a permanent coo lant which does not
need to be changed. The coolant consists of a
mixture of spec ially conditioned water and the
manufacturer's glycol-basedcoolant addi-
tive G13 antifreeze with ant icorros ion addi­
tives (50% for USA models; 60% for Ca nada
models) . This mixture both assures the neces­
sary frost protection and protects metal com­
ponents in the engine's cooling system from
corrosion and scaling.
It a lso raises the boil­
ing point of the coo lant.
Do not reduce the concentration o f the coo l­
ant in the summer by adding plain water .
The
proportion of coolant additive must be at
least 50% but not more than 60%
to main­
tain antifree ze protection and cooling efficien­
cy. If the coolant frost protect ion is too low,
the coolant could freeze and damage the veh i­
cle heating and engine cooling system .
For year-round driving, antifree ze is added at
the factory for temperatures down to:
- -31°F(-35°C)USA
- - 40 °F ( -40 °C) Canada.
I f you must add coo lant, use a mixture of wa­
ter and coolant addit ive. Mixing the coolant
additive with distilled water is recommended.
_& WARNING
Before yo u check anything in the engine
compartment, always read and heed all
WARNINGS
~ &. in Working in the engine
compartment on page 179.
(D Note
- Before winter sets in, have the coolant
checked to see if the coolant additive in
-
your vehicle is sufficient to meet the cli­ mate conditions . This is especia lly impor­
tant if you live in a reg ion where the win­
ter is extreme ly cold. If necessary, in­
crease the proportion of coolant add itive
to 60% .
- When adding coolant additive to your
cooling system, remember:
- We recommend using only coolant ad­
ditive G12++ or G13 for your vehicle.
This coolant additive is available at au­
thorized Audi dealers. Other types of
antifreeze can significantly reduce cor­ rosion protection. The resulting corro­
sion can cause a loss of coolant and se­
rious engine damage .
- Do not add any type of rad iator leak seal­
ant to your vehicle's engine coolant.
Adding radiator repair flu id may adverse­
ly affect the function and performance of
your cooling system and could result in
damage not covered by your New Vehicle
Limited Warranty.
Checking the engine coolant level
The engine coolant level can be checked with
a quick glance.
Fig. 148 E n gin e compart men t: Cover on the coo la n t
expans io n tank
.,. Before you check anything in the engine
compa rtment,
always read and heed all
WARNINGS ~ ,& in Working in the engine
compartment on page 179.
.,. Park your vehicle on a level surface .
.,. Tur n off the ignition.
.,. Read the engine coolant level from the coo l­
ant expansion tank
c:> fig . 148, c:> page 181,
fig. 145.
With a cold engine, the coolant Iii>-

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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

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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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