radiator cap AUDI Q3 2015 Owners Manual

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Starting th e engin e
"'Pre ss the brake peda l and move the se lector
lever to position P or N.
"' Turn the ignition key to position @. The ig­
nition key automatica lly returns to position
® · Do not press the accelerator.
If the engine fails to start immediately, switch
off the starter and try again after about
30 seconds . To start the engine again, turn
the ignition key to position @.
A WARNING
-Never allow the engine to run in confined
spaces -dange r of asphyxiation.
- Never remove the ign ition key from the
ignition look while the vehicle is moving.
Otherw ise, the stee ring lock could sud­
denly engage and you would not be able
to steer the vehicle.
- Always take the key with you whenever
you leave your vehicle . Otherwise, the
engine could be started or e lectr ica l
equipment such as the power w indows
cou ld be operated . This can lead to seri­
o us injury .
- Never leave c hildren or persons requi ring
assistance unattended in the vehicle. The
doo rs can be locked using the remote
transmitter, preventing peop le from es­
caping from the vehicle on their own in
the event of an emergency. Depend ing
on the time of year, people inside the ve­
hicle can be exposed to very h igh or ve ry
low temperatures .
(D Note
Avoid high engine rpm, full throttle and
heavy eng ine loads until the eng ine has
reached operat ing temperature -other­
w ise you risk engine damage.
@) For the sake of the environment
Do not let the engine run while parked to
warm up. Beg in driving immediately. This
red uces unnecessary em iss ions.
On th e ro ad 67
(D Tips
-If it is difficult to turn the ignition key to
posit ion ©, move the steering wheel (to
take the load off the steer ing lock mech­
anism) until the key turns freely.
-After starting a cold engine, there may be a brief period of increased no ise be­
cause the oil pressure must f irst bu ild up
in the hydraulic valve adjusters. This is
normal and not a cause for concern.
Stopping the engine
App lies to vehicles : wit h ignition lock
Stopping the engine
"' Bring the veh icle to a full stop .
"' Tu rn the ignition key to posit ion @.
Steering lock
Req uirement: The selector lever must be in
pos ition P .
"' Remove the ignition key whi le it is in posi­
tion @¢
page 66, fig. 74 ¢ &,.
"'Turn the steering wheel until you hear the
steer ing lock engage .
The steering lock acts as a theft deterrent.
A WARNING
- Never turn off the engine before the ve­
hicle has come to a comp lete stop. The
fu ll funct ion of the brake booster and the
power steeri ng is not gua ranteed . You
must use more fo rce to tu rn o r brake if
necessa ry. Be ca use you canno t steer and
bra ke as you usually wo uld, this could
lead to crashes and ser ious injuries .
- F or safety re aso ns, you sho uld a lways
pa rk your vehi cle w it h the selector lever
in P. Otherwise, the vehicle could inad ­
vertently roll away.
- T he radiator fan can continue to run for
up to 10 minutes even after you have
turned off the engine and removed the ignit ion key. The radiator fan can a lso
turn on again if the engine coo lant heats
~

180 Checking and filling
coolant can be seen or heard before
carefully opening the hood.
- Keep children away from the engine com­
partment.
- Never spill fluids on hot engine compo­
nents. They can cause a fire.
- Never touch the radiator fan. The auxili­ ary electric fan is temperature controlled
and can switch on suddenly.
- Never open the coolant reservoir cap
when the engine is still warm. The cool­
ant system is pressurized and hot cool­
ant could spray out .
- Protect your face, hands and arm from
steam or hot engine coolant by placing a
thick rag over the cap when you open the
coolant reservoir .
- Do not remove the engine cover under
any circumstances. This increases the
risk of burns.
- If work on the fuel system or the electri­
cal system is necessary:
- Always disconnect the battery .
- Never smoke or work near heaters or
open flames. Fluids in the engine com­
partment could start a fire.
- Keep an approved fire extinguisher im­
mediately available.
- To avoid electrical shock and personal in­
jury while the engine is running or being
started, never touch:
- Ignition cables
- Other components of the high voltage
electronic ignition system.
- If you must perform a check or repair
with the engine running:
- First, fully apply the parking brake,
move selector lever of automatic trans­
mission to "P" (Park) .
-Always use extreme caution to prevent
clothing, jewelry, or long hair from get- ting caught in the
radiator fan, V-belts
or other moving parts, or from contact­
ing hot parts. Tie back hair before
starting, and do not wear clothing that
will hang or droop into the engine .
- Minimize exposure to emission and
chemical hazards
c> A .
A WARNING
-California Proposition 65 Warning:
- Engine exhaust, some of its constituents,
and certain vehicle components contain
or emit chemicals known to the State of
California to cause cancer and birth de­
fects and reproductive harm. In addition,
certain fluids contained in vehicles and
certain products of component wear con­
tain or emit chemicals known to the
State of California to cause cancer and
birth defects or other reproductive harm.
- Battery posts, terminals and related ac­
cessories contain lead and lead com­
pounds, chemicals known to the State of
California to cause cancer and reproduc­
tive harms. Wash hands after handling.
(D Note
When adding fluids, always make sure that
they are poured into the proper container
or filler opening, otherwise serious dam­
age to vehicle systems will occur.
@ For the sake of the environment
To detect leaks in time, inspect the vehicle
floor pan from underneath regularly. If
you see spots from oil or other vehicle flu­
ids, have your vehicle inspected by an au­
thorized Audi dealer.

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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 . .,.
•
•

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.

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Front towing loop
Do not install the front towing loop until it is
needed.
Fig. 1 73 Fro nt bumper : Remov ing th e cover
Fi g.17 4 Fron t bumper: S crew ing in the tow ing loo p
The screw connection for the towing loop is
l ocated behind a cove r on the right side of the
front bumper.
"' Take the towing loop and the hook out of
the vehi cle too l kit
c:::> page 216 .
"'Inse rt the hook into the ho le in the cover
and carefully pu ll the cove r off in the direc­
tion ind icated
<=:> fig . 173.
"' Screw the towi ng loop tight ly into the
threaded hole as far as it will go
c:::> fig. 174
and t ighten it w ith the wheel wrench .
When it is no longer needed, unscrew the
towing loop and put it back into the veh icle
too lkit . Be sure to have the tow ing loop stored
in the vehicle at all times.
When re-insta lling the cover be s ure to first
insert the tabs on the cover into the retainers
near the radiator gri lle . Then insta ll the other
side of the cover and push it into the retainers
¢ fig . 173 .
The appearance of the cover varies from the il­
l ustration for some model versions.
Emergenc y situ ation s 231
A WARNING
If t he tow ing loop is not screwed in as far
as it will go, the thread can pull out when
the vehicle is towed -potent ia l risk of an
accide nt.
(D Note
The cover is attached to the bumper with
several hooks . Do not use excess ive force
when remov ing t he cover to avoid damag­
i ng it.
Rear towing loop
On vehicles without a factory -installed trailer
hitch*, the threaded hole for the towing loop
is on the right side of the rear bumper.
0
Fi g. 17S Rear bumper: Cov er cap
0
F ig . 1 76 Rea r bumper: Sc rew ing in tow ing loop
V ehicles with a towing loop
"' Take the towi ng loop out of the vehicle tool
ki t
c:::> page 216.
"' Press the cover in by app lying short strong
pressure to the bottom part to release it
from the bumper
c:::> fig. 175.
"' Screw the towing loop t ightly into the
threaded ho le as far as it w ill go
¢ fig. 176
and tighten it with the wheel wrench. Ill>

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