2015 AUDI Q3 heating

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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No.
13
14
15
16
17
18
19
20
23
26
27
28
Consumer
A ir quality/outside air sen-
sor, heated washer jets,
Electronic Stabilization Con-
trol (button), reversing
light, electromechanical
parking brake, o il level sen-
sor, climate control, seat oc-
cup ied recognit ion system,
seat heating, contro ls in
center console, automatic
dimming mirrors
Eng ine control u nit, auto-
matic transmiss ion, bra ke
l ights, electro-mechanical
power steer ing, gateway
control un it, towing bracket
control unit, ESC contro l
unit, light switch, damping
control un it
H eadlight leveling, park ing
brake contro l unit, inst ru-
men t lighting, headlights,
diagnostic connector, adap-
tive light control unit, heat-
er for crankcase, air mass
meter, relay for electr ical
sockets, DC/DC converter
Parking aid
Reversing camera for park-
i ng a id
TV tuner
Eng ine starter cont ro l unit,
DC/DC converter
ESC control unit, air condi-
tioner controls, interface for
spec ial functions
e lectromechanical parking
b rake switch, switches for
interior lighting (front), di-
agnostic connector, light
switch, rain and light sensor,
humidity sensor
Rear window wiper
Starter control un it
Radio/MM I
Amps
5
7,5 10 5
5
5 5
s
10
15
40
15/7,5
Fu ses and bulb s 225
No. Consumer Amps
29
Supply for reversing camera
15 for park ing aid and TV tuner
30 Infot ainment 5
31
Infotainment 5
32
Instr ument cluster 5
33
Automatic dimming rear-
view m irror
10
E lectrica l socket in front
36 cabin, electrical socket in 20
luggage compartment
37 Electr ica l soc ket i n rear cab-
20 in, ciga rette lighter
38 Automatic transmission 15
44
Rear window hea ting 30
45
Parking brake control unit 20
48
Power-operated rear lid 30
so B lower 40
51
Parking brake control unit 20
52
On board supply control unit 20
53
Seat heating, front 30
54
Panoram ic sun roof 20
55
Sun b lind for panorama sun 20
roof
56
Contro l unit fo r suspension
20 cont rol
Engine compartment fuse assignment
The fuse number is given on the plastic be­
neath or above the correspond ing fuse.
No. Electrical equipment
amps
1 Power supply for automatic 5 transmission
2
E lectronic Stabilizat ion Con-
30 t ro l (E SC)
3 Horn 15
4
DC/DC converter 40
5
Onboard supply control unit 5
6
BCM (righ t-side) 30
7
Washer pump 20
8
BCM ( left -side) 30
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246 Index
Checking the engine coolant leve l .... . 186
Radiator fan . . . . . . . . . . . . . . . . . . . . . . 188
E ng ine coolant temperature
Temperature gauge ..... .. .. .. .. .. .. 10
Eng ine hood
Closing .... .......... ...... ... .. . 179
H ow to release the hood . . . . . . . . . . . . 179
E ngine oi l ..... ........... .... .... . 181
Adding .. .. ............. .. .. .. ... 184
Addi tives . . . . . . . . . . . . . . . . . . . . . . . . . 184
Changing .. ................ ... .. . 185
Check oil level ............ ... .. .. . 184
Consumpt ion . ........... .. .. .... . 184
I ndicator light . . . . . . . . . . . . . . . . . 17, 18
O il consumption .......... .... .... . 183
Oil dipstick ............... ... .... . 184
Oil grades . ................. ..... . 181
Pressure malfunction ....... .... ... .. 15
Sensor defective . . . . . . . . . . . . . . . . . . . . 18
Specification and viscosity .. .. .. .. .. . 181
Engine speed limitation ......... .... . . 17
Environment Break-in period ... ..... ... .. .. .. .. . 161
Cata lytic converter ............ ..... 161
Disposing of your vehicle battery .. .. . 193
Driving at high speeds ......... .. .. . 163
Driving to minimize pollution and noise 162
Fuel ... .... ................ ..... . 177
Fue l economy .............. .. .... . 162
Leaks under your vehicle ... .. .. .... . 179
Le tting the vehicle stand and warm up . 163
Proper disposal of dra ined brake fluid . 189
Proper disposal of dra ined engine cool-
ant . .. .... ... .......... .. .. .. .. . 187
Proper disposal of dra ined engine
oil . . . . . . . . . . . . . . . . . . . . . . . . . 184, 185
Recycling used engine oil ......... .. . 184
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . 58
Unleaded fuel ..................... 175
What should I do with an old battery? 193
EPC
refer to Electronic power control . . . . . . 17
Event Data Recorder (EDR) . ........ .. . 152
Exhaust tail pipes Cleaning . ............... ........ . 171
Expansion tank ............ .. .. .. .. . 186
Exterior lighting ............ ... .. ... . 40 Exterior
mirrors
Adjusting ..... .. .. .............. .. 44
Dimm ing . ... .. .. .. .............. .. 45
Heating ... .... .. ............. .... . 44
F
Fan
Radiator
Fastening Booster seats .... ................ .
Convertib le child safety seats ..... .. .
Infant seats ..... ............. ... .
Flat tire 188
141
140
139
Changing . .... .. ............. .... 218
Floor .. .. .. .. .. .. .. ...... .... ..... . 62
Floor mats . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Fog lights/rear fog lights ...... ... .. .. . 40
Folding chocks .. .. ... .......... .... 217
Folding the rear seat forward ... .. .. .. . 60
Foot pedals ..... .. .......... ...... .. 99
For the sake of the environment Gasoline fumes and the environment .. 177
Le tting the engine warm up . . . . . .
66, 68
Refueling . . . . . . . . . . . . . . . . . . . . . . . . 177
Sav ing fuel by early upshifting ........ 11
Front airbags Description . . . . . . . . . . . . . . . . . . . . . . . 116
How they work . .. ............. .... 121
Frontal collis ions and the laws of physics 105
Front passenger's door emergency lock ing 33
Front seats . . . . . . . . . . . . . . . . . . . . . . . . . 50
Adjusting . .... .. ............. .... . 96
Child restraints in the front seat .. .. .. 114
Fuel Additives . ..... .. ................ . 175
B lended gasoline ................. . 175
Consumption .. ... ................ . 22
Filler neck . .... .. ............. .... 176
Fuel gauge . . . . . . . . . . . . . . . . . . . . . . . . 11
Gasoline .. ... ... ................ . 175
Gasoline additives ................ . 176
Low fuel level symbol . . . . . . . . . . . . . . . 18
Octane rating .. .. ............. .... 175
Recommendation ... ........... .. .. 175
Refueling . . . . . . . . . . . . . . . . . . . . . . . . 177
Reserve ........................... 11
Tank capacity .. .. ... .......... .... 235

250 Index
Pregnant women Specia l consid erations when wearing a
safety be lt .... ... .... ... .. .. .... . 109
Prope r safety belt pos it ion . .. .. .. .. .. . 108
Proper seat ing pos ition
Front passenger . . . . . . . . . . . . . . . . . . . . 96
Occupants .. ................ ... ... . 95
Rear passengers . . . . . . . . . . . . . . . . . . . . 97
Protecting . . . . . . . . . . . . . . . . . . . . . . . . . 172
P rotective liner .. .. ..... ... .. .. .... .. 62
Q
Qua rtz clock . . . . . . . . . . . . . . . . . . . . . . . . 23
q uattro
refer to All -wheel dr ive ..... ... .. ... 158
Question What happens to unbe lted occupants? 105
Why safety belts? ........ .. .. .... . 104
R
Radiator fan 188
Ra in/ lig ht sensor
H eadlights . ... .......... .. .. .. .. .. 40
I n termittent (windshield wipe rs) .. .. .. 4 6
Sensor defective .. ..... ... .. .. .... .. 1 9
R eading lights .............. ... .. .. .. 43
Rear lid Automatic operation ...... .. .. .... .. 35
Emergency release .. ... ... .. .. .. .. . . 36
Opening and clos ing ....... ... .. .... 34
Rear light Defective ................. .. .... .. 18
Rear v iew c amer a
refer to Parking systems . . . . . . . . . . . . . 89
Rear v iew mir ro r .. ...... .... ... .. .. .. 45
Rear window heating . . . . . . . . . . . . . . . . . 65
Re circul ation mode (au tomatic climate
con trol) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Refueling . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Release lever for hood . . . . . . . . . . . . . . . 179
R emote cont rol
Rese tting remo te control .. .. .. .. .. . . 30
Remote control key . . . . . . . . . . . . . . . . . . . 29
un locking/locking ............ .. .... 30 R
emote maste r key
Battery replacement . . . . . . . . . . . . . . . . 30
Check light . ... .. ... .. ..... ... .. .. . 30
Remote rea r lid re lease .......... .. .. . 34
Repair ma nuals .. .. .. .. ...... ... .. .. 237
Repairs Airbag system ... .. ... ..... ... .. .. 126
Rep la cement key .. ............. .... . 29
Replacing Windsh ield w iper b lades ........... .. 48
R e pl acing b ulbs ... ... .. ..... .... . .. 226
Replac ing tires and wheels ........ .. .. 20 7
Rep lacing wiper b lades .......... .. .. . 47
Repor ting Sa fe ty Defects . . . . . . . . 101, 102
Reset button . . . . . . . . . . . . . . . . . . . . . . . . 23
Resetting remote cont ro l ...... ... .. .. . 30
Retracto r ... .... .. ............. .... 10 7
Reversible floor . . . . . . . . . . . . . . . . . . . . . . 62
Rims Cleaning . ..... .. .. ... .. ..... ... .. 171
Roof rack
Roof~ ad ..... .. ... .......... .. .. . 58
Roof weight ..... ... .. ..... ... .. .. . 58
s
Safe drivi ng habits ................ .. . 94
Safety be lt pos ition ............... .. 108
Safety be lt height adjustme nt . ...... 110
Safety be lts wo rn by pregnant women . 109
Safety be lt pretensioner .......... .... 110
Serv ice and disposal . . . . . . . . . . . . . . . 111
S af ety be lts . ...... ............. .... 1 07
C leaning . ..... .. .. ... ..... ... .. .. 172
Danger to passengers who do not wear a
safety be lt . ... .. .. .... .... ... .. .. 105
Fastening . . . . . . . . . . . . . . . . . . . . . . . . 107
Height ad justment ............. .. .. 110
Improperly worn ...... .. ... ..... .. 110
Not wor n ..... .. .......... ...... . lOS
Safety be lt pos ition ......... ...... . 108
Safety i nstr uctions ... .......... .. .. 10 7
Secu ring child sa fe ty seats .... .. .. .. 143
S pec ia l considerations for pregnan t
women ... .... .. .. ... ..... ... .. .. 109
Un fastening ..... ... .. ..... ... .. .. 109
Warning/ind icator light ......... .... 104

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Warning light ..... .... ... .. .. .. .... 16
WhyYOU MUSTwearthem ... .. .. .. . 104
Worn properly . . . . . . . . . . . . . . . . . . . . 106
Safety compliance st icker ... .. .. .. .. . 234
Safety equipment . . . . . . . . . . . . . . . . . . . . 94
Safety features for occupant restra int and
protection ... .... .. .... ... .. .. .. .... 94
Safety guide lines
Seat adjustment . . . . . . . . . . . . . . . . . . . . SO
Safety instructions Eng ine compartment .. .... .. .. .. .. . 179
for side curtain a irbags .. ..... .... .. 132
for us ing ch ild safety seats . .. .. .. .. . 136
for using safety be lts ...... .. .. .. .. . 107
Mon itoring the Advanced Airbag Sys-
tem ..... .. .. .... .. .... ... .. .. ... 125
Seat Number of seats ......... .. .. .. .. . 104
Seat adjustment ........... .. .. .. .... 51
Driver 's seat . . . . . . . . . . . . . . . . . . . . . . . SO
F ront passenger's seat . . . . . . . . . . . . . . . 51
Front seats . . . . . . . . . . . . . . . . . . . . . . . . SO
H ead restraints .......... .. .. .. .. .. 97
Seat belts
refer to Safety belts . . . . . . . . . . . . . . . . 104
Seat covers Cleaning ... .... ...... ... .. .. .. ... 173
Seat heating . . . . . . . . . . . . . . . . . . . . . . . . 65
Sea ting capacity . . . . . . . . . . . . . . . . . . . . 104
Seating posi tion
Driver ..... ... .. .. ..... ... .. .. .... 95
Front passenger .......... .. .. .. .. .. 96
How to adjust the front seats . . . . . . . . . 96
Incorrect seat position . . . . . . . . . . . . . . . 98
Occupants ................ ... ... ... 95
Rear passengers . . . . . . . . . . . . . . . . . . . . 97
Seats Fo lding .. .. ............. .... .. .... 60
Selec tive unlock fea ture ..... .. .. .. .. .. 32
Select ive wheel torque control (all -wheel
d rive) . .. .. .. .. ........ ... .. ... ... . 153
Selector lever ............. .... .. .. .. 81
Selecto r lever (automatic tr ansmission)
E me rgency operation . . . . . . . . . . . . . . . . 86
Service and disposal Safety belt pretens ioner . ......... .. 111
Service interval disp lay . . . . . . . . . . . . . . . . 25
Inde x 251
Serv ice position
refer to Replacing wiper blades . ... .. . 47
S ET button . . . . . . . . . . . . . . . . . . . . . . . . . 23
S hi ft paddles .. .. .. ................. . 84
Sh utting down vehicle . ... .... ... .. .. 162
S ide a irbags
Desc ription .. .. .... ... ....... ..... 127
How they wor k ... ................. 128
Side assist Activati ng and deactivating ........... 77
Adjusting the brightness . . . . . . . . . . . . . 77
Cleaning the senso rs . . . . . . . . . . . . . . . 171
Des cription .. .. .. .. . .............. . 75
Senso r range . . . . . . . . . . . . . . . . . . . . . . 76
Side curta in airbags .. .............. . 130
Desc ription .. .. .. .. . .. .... .... .. .. 130
How they work ... .. ............... 131
Safe ty i nstr uctions ................. 132
Side marker lights . ............. .... . 40
Ski sack . ... .. .. .... . ... ...... ... .. . 61
Slid ing/tilt ing sunroof
Convenience opening/clos ing .. .. .. .. . 37
Snow cha ins .. .. .. ................. 211
Socket ... .. .. .. .. .. . .. ... .... ... .. . 5 4
Sources of information abo ut child re-
stra ints and their use . ............... 151
Spare tire ... .. .. .. ................. 217
Spare whee l .. .. .. ............... .. 217
Speed rat ing letter code ............. . 207
Speed warning system . . . . . . . . . . . . . . . . 73
START ENG INE ST O P button (conven ience
k ey) ..... .. .. .. .... ... .......... .. . 69
START ENGINE STOP button (Co nvenience
key) .......... ... .. ..... ........... 68
Starting Hill ho ld . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Star ting from res t .. ............. .. .. . 71
Start ing off w ith a trailer ............ .. 72
Starting the engine . . . . . . . . . . . . . . 66, 68
Stee ring
El ectromechanica l steer ing . . . . . . . 158, 0
L ocking the steering . . . . . . . . . . . . . . . . 66
L ocking (convenience key) . . . . . . . . . . . . 69
Locking (ignition lock) .. ..... ... .. .. . 67
also refer to Electromechan ica l steer-
ing ......... .. .. ................. 158
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