2015 AUDI S3 cooling

202 Trailer towing
Trailer towing Driving with a trailer
General information
Your Audi was designed primarily for passen­
ger transportation .
If you plan to tow a tra iler, p lease remember
that the addit ional load will affect durab ility,
economy and performance .
T railer towing not on ly places more stress on
the vehicle, it also calls for more concentra­
tion from the driver.
F or this reason, always fo llow the operating
and drivi ng i nstr uctions provided and use
common sense.
Technical requirements
Traile r hitch
Use a weight-carrying hitch conforming to the
gross trailer we ight. The hitch must be suita­
b le for your veh icle and trailer and mu st be
mounted secure ly on the ve hicle's chassis at a
technically sound location . Use only a trailer
h itch with a removab le ball mount. A lways
check with the tr ailer hitch manu fac tur er to
make sure tha t you are using t he cor rect
hitch.
Do not us e a bumper hitch .
The hitch must be installed in such a way t hat
it does not interfe re with t he impact-absorb­
ing bumper syst em . No mod ifications should
be made to the vehi cle exhaust and brake sys ­
tems . From time to time, check th at a ll hit ch
mo unt ing bo lts remain secure ly fastened.
When you are not towing a trail er, remove the
tra iler hitch ba ll mount. This prevents the
hi tch from causing d amage sho uld your ve hi­
cle be str uck from be hind
¢ A .
Trailer brakes
If you r tra ile r is eq uipped w ith a braking sys­
tem, check to be su re that it conforms to a ll
r egulat ions . T
he trailer hyd raulic brake system mus t not be
direct ly connected to the vehicle's hydraulic
brake system .
Safety chains
Always use s afety chains be tween your ve hicle
and t he tra ile r.
Trailer lights
Tra ile r li ghts must meet all regulations. Be
su re to c hec k w ith your Audi dea le r fo r cor rect
wiring, swi tches and relays.
Mirrors
If you are unable to see the traffic behind you
u sing the regular o utside m irrors, then you
must insta ll ext ended mirro rs . It is important
t h at you
always have clea r vis io n to the rea r.
,8. WARNING
-
Afte r removing t he trailer hit ch, d o no t
s tore it in yo ur vehicle . In case of sudden
br aking, t he h itch cou ld fly forward an d in­
j ur e you or yo ur passengers .
Operating instructions
Maximum traile r weight
A trai le r fo r you r vehicle is limited to a typi cal
class 1 or class 2 trai le r.
Trailer load distribution
B e sure the load in the t ra ile r is held secure ly
i n p lace to p reven t it from shift ing forw ard,
backw ard or sideways.
Never allow a passenger to ride in a trailer
¢ A in Driving instru ctions on page 203.
Engine cooling system
Towing a trailer makes the engine work hard­
er . It is impo rtant that the cooling system 's
performance is up to the additional load .
Make su re that the coo ling system has enough
fl uid .
Tire pressure
When towing a trailer, inflate the tires of your
vehicle to t he cold tire pressure listed under
ll>

M N
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M 1.1"1 ,....,
~ If there was no Ad Blue left in the tank and a
range of
O mi (0 km) was displayed in the
instrument cluster, switch the ignition on
for about 15 seconds before starting the en­ gine.
_& WARNING
Ad Blue can irritate the skin, eyes and res­piratory system. If there is contact with
the fluid, flush immediately with plenty of
water. Consult a physician if necessary.
(D Note
- Only use Ad Blue that conforms to the standard ISO 22241-1. Do not mix any
additives with the Ad Blue and do not di­lute it with water .
- Do not add Ad Blue to the diesel tank or
add diesel fuel to the Ad Blue tank. Mix­
ing can lead to damage to the engine
and the Ad Blue tank system. Warranty
does not cover damage caused by this.
- AdBlue attacks surfaces such as painted
vehicle components, plastic and carpet.
Remove the fluid as quickly as possible
with a damp cloth and plenty of cold wa­
ter. If the Ad Blue has already crystal­ lized, use warm water and a sponge .
AdBlue residue that is not removed will
crystallize and can damage the affected
surface .
- Do not store the refill bottle in the vehi­ cle. If it leaks, the escaping Ad Blue could
damage the vehicle interior.
- Do not allow AdBlue to come into con­
tact with clothing . If there is contact
with the fluid, flush immediately with
plenty of water.
@ Tips
- You can obtain refill bottles from an au­
thorized Audi dealer or authorized Audi
Service Facility.
- Follow the AdBlue manufacturer's in­
structions for use and storage.
Checking and Filling 217
Hood
Working in the engine compartment
Special care is required if you are working in
the engine compartment
For work in the engine compartment such as
checking and filling fluids, there is a risk of
injury, scalding, accidents, and burns. For
this reason, follow all the following listed
warnings and general safety precautions.
The engine compartment is a dangerous
area.
c::> .&. .
_8 WARNING
To reduce the risk of injuries, complete the
following steps before opening the hood:
- Turn the engine off.
- Switch the ignition off.
- Set the parking brake.
- Place the selector lever in the P position.
- Let the engine cool down.
- Never open the hood when you see that
steam or coolant drips from the engine
compartment- there is a danger of burns! Wait until no steam or coolant
flows out .
- Keep children away from the engine com­
partment.
- Never spill fluids on a hot engine . These
fluids (such as the freeze protection con­
tained in the coolant) can catch fire .
- Avoid short circuits in the electrical sys­
tem, especially the battery .
- When working in the engine compart­
ment, remember that the radiator fan
can switch on even if the ignition is
switched off, which increases the risk of
personal injury.
- Never open the cap on the coolant ex­
pansion tank when the engine is warm.
The cooling system is under pressure.
- To protect your face, hands, and arms
from hot steam or coolant, cover the cap
with a large cloth when opening.
II>-
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222 Check ing and F illin g
Using the proper engine o il is important for
the functionality and service life of the en­
g ine. Your engine was factory-filled with a
high-quality oil which can usua lly be used
throughout the entire year.
0 Note
Your L imited New Vehicle Warranty does
not cover damage or ma lfunctions due to
fai lure to follow recommended mainte­
nance and use requ irements as set forth in
the Audi Owner's Manual and Warranty
&
Ma intenance booklet.
- Use only a high quality eng ine oil that ex­
pressly complies w ith the Audi o il quality
standard spec ified for your veh icle's en­
gine. Using any other oil can cause seri­
ous eng ine damage.
- Do not mix any lubricants o r othe r addi­
tives into the eng ine o il. Doing so can
ca use engine damage.
If you need to add oi l and there is no ne
availab le tha t mee ts the Audi oil qua lity
s tandard your engine requires, yo u may
add a tota l of no more than 0 .5 quart/liter
of a high-quality "synthetic"oil that meets
the following specifications.
- Vehicles with gaso line engine: ACEA A3
or API SM with a viscosity grade of
SAE 0W-30, SAE SW-30 or SAE SW-40.
- Vehicles with diesel engine: ACEA C3 or
API CF with a v iscosity grade of
SAE 0W-30 or SAE SW-30.
- For more information abo ut eng ine oil
that has been approved for your vehicle, please contact either your a uthorized
Audi dealer or Audi Customer Relations
at 1 (800) 822-2834 or visit our web site
at www.audiusa .com or
www.aud icanada.ca.
Engine oil consumption
The engine in your vehicle depends on on ade­
quate amount of oil to lubricate and cool all
of its moving ports .
In order to provide effective lubricat ion and
cooling of interna l eng ine components, all in­
ternal combust ion e ngines consume a certain
amount of oil. Oil consumpt ion va ries from
engi ne to engine and may change sig nifican tly
over the life of the engine. Typically, engines
with a spec ified break -in period (see
¢ page 197) consume more oil during the
break-in period than they cons ume after oi l
consumption has stabilized.
U nder normal cond itions, the rate o f oi l con ­
s u mption depends on the q uality and viscos ity
of the oil, the RPM (revolutions per minute) at
which the engine is operated, the ambient
temperature and road conditions. Further fac­
tors are the amount of oil dilut ion from water
condensation or fue l residue a nd the oxida­
t ion level of the oil. As any eng ine is subject to
wea r as m ileage builds up, t he oil co nsump ­
t ion may increase over time until replacemen t
of worn components may be come necessary.
With a ll these variab les coming into play, no
standard rate of oil consumpt io n can be es­
tabl ished o r spe cified . There i s no alte rnative
to regu lar and frequent che ck ing of the o il lev ­
el , see
Note.
If the yellow engine oil leve l wa rning symbo l
Ill in the inst rument cl uste r lights up, you
sho uld check the oil leve l as soon as possib le
i=> page 223 . Top off the oil at your earliest
convenience
i=> page 223 .
A WARNING
--
Before you check anything in the engine
compartment, always read and heed a ll
WARNINGS¢ page 217.
(D Note
Driving wit h an insufficient o il level is like -
l y to cause severe damage to the engine.
liJJ,

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M 1.1"1 ,....,
Always keep your forearm parallel to the
ground to help prevent hot oil from run­
ning down your arm.
- Drain the oi l into a conta iner designed
for this p urpose, one large eno ugh to
hold at least the total amount of oil in
your engi ne.
- Engine oil is poisono us. Keep it well out
of the reach of c hildren .
- Cont inuo us contact with used engine oil
is harmful to your skin. Always protect
you r sk in by washing oil off thoroug hly
with soap and water .
(D Note
Never mix oil addit ives with your engine
oil. These additives can damage your en­
gine and adversely affect y our Aud i Limit­
ed New Vehicle Wa rra nty .
@ For the sake of the environment
- Before changing your oi l, f irst make sure
you know whe re you can proper ly dispose
of the used o il.
- Always d ispose of used engine oil proper­
l y. Do not dum p it o n ga rden so il, wood ­
ed a reas, into open streams or down
sewage dra ins.
- Recycle used engine o il by taking it to a
u se d engine oil collection facility in your
a rea, or contact a servi ce 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 an d generally re ­
q uir es little attention.
The cooling system has been filled at the f ac­
tory with a pe rm anen t coo lan t which does no t
n eed to be changed. The coolant consists of a
mixture of specia lly conditioned water and the
manufacturer's glyco l-based coo lant add i-
tive Gl3 antifree ze with ant icorros ion addi-
Checking and Fillin g 225
tives (50% for USA mode ls; 60% fo r Canadian
models) . This mixture both ass ures the neces­
sary frost protection and protects metal com ­
ponents in the eng ine's cooling system from
corros io n and scaling. It also raises the bo il­
ing point of the coolant .
Do not reduce the concentration of the cool ­
ant in the s ummer by adding p lain water.
The
proportion of coolant additive must be at
least 50°/o but not more than 60 %
to main­
ta in antifreeze protect io n and cool ing eff ic ien­
cy . If the coo lant frost p rotection is too low ,
t he coo lan t could freeze and damage the vehi ­
cl e heating and engine cooling sys tem.
Fo r year- round drivi ng, a ntifreeze is added at
the factory fo r temperatures down to:
- -31 °F
< -3s0c) u sA
- -40°F ( - 40°C) Canada.
If you must ad d coo lant, use a mixture o f wa ­
te r and coolant additive. Mixing the coo lant
additive with dist illed water is recommended.
A WARNING
Before you chec k anything in the engine
compartment, always read and heed all
WARNI NGS
c:> page 217.
-
(D Note
- Before winter sets in, have the coo lant
checked to see if the coolant additive in
your vehicle is sufficient to meet the cli­ mate condit ions. This is especially impor­
t ant if you l ive i n a region where the win-
t er is extremely cold. If necessary, in-
c rea se t he p ropo rtion of coo lant add itive
t o 6 0% .
- Whe n ad d ing coolant addi tiv e to yo ur
c ooling sys te m , reme mbe r:
- We recommend using on ly coo lant ad­
d itive Gl2 ++ or Gl3 (check the labe l)
for your vehicle. This coolant additive is ava ila ble at autho rized Aud i dea le rs .
Othe r ty pes of antifreeze ca n sig nifi­
cantly reduce cor ros io n protec tion . The
r esu lting co rrosion can cause a lo ss of
c o o lant a nd serio us e ng ine da mage.
IJI,,
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226 Checking and Fill in g
- Do not add any type of radiator leak sea l­
ant to your ve hicle's engine coolant.
Adding rad iator repair fluid 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.
Adding coolant
Fig . 164 Engine co mpa rtment: mark in gs on the coo l­
ant expans ion tank
R ea d a nd f ollow ing th e W ARNING S before
checking anything in the eng ine compartment
¢ page 217.
Ch eck ing t he e ngi ne coolant level
"Park your vehicle on a level surface .
.. Switch the ign ition off .
" Read the coo lant level on the coolant expan­
s ion tank ¢
fig. 164. The coo lant level must
be between the markings when the eng ine
in cold. When the engine is warm it can be
sl ightly above the upper marking .
Adding coolan t
Requirement : There must be a residual
amount of coolant in the expansion tank ¢(D .
.. Let the engine cool down.
" Place a cloth over the coolant expansion
tank cap and unscrew the cap counterclock­
wise ¢&_ .
.. Add coolant mixed in the correct ratio
¢ page 225 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
c ility and have the cooling system inspected.
If the cooling system is not leaking, a loss can
come from the coolant boiling through over­
heating and being pushed out of the cooling
system.
A WARNING
The cooling system is press urized and can
become very hot. To reduce the r isk of
b urns from hot coolant:
- Do not open the coolant expansion tank
cap with the engine ho t. T here is a risk of
burns.
- Stop the eng ine and a llow it to cool.
- Protect your face, hands and arms from
escaping coolant and steam by covering
the coolant tan k cap with a large, th ick
cloth.
- Turn the coolan t tank cap counterclock­
wise slowly and keep light pressure on
the cap .
- To reduce the risk of burns, do not allow
any antifreeze or coolant to drip onto the
exhaust system or hot engine compo ­
nents. The ethy lene g lycol in engine
coo lant can catch fire under certain cir­
cumstances.
- The coolant additive 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 rad iator fan
can switch on even if the ignition is
sw itched off, which increases the risk of
pe rsonal injury.
(D Note
Do not add coolant if the expansion tank is
empty . Air could enter the cooling system
and damage the eng ine .
If this is the case,
do no t continue dr iving. See a n author ized
A udi dealer or authori zed Aud i Service Fa­
cility for assist ance.

2 78 Fuses and bulbs
No . Equipment Ampere
Door/front passenger's side
F39 doors (for example, 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 Starter, clutch sensor, head-
s light
relay coil
FS3 Rear window defogger
30
The power seats* are protected via
circuit
breakers
that automatically switch on after a
few seconds after the overload has been re­
duced.
@ Tips
Note that the following table was accurate
at the time of print ing and is subject to
change.
Left engine compartment fuse
assignment
Fig. 189 Engine compartment : fuse assignment
No.
Fl
F2
F3
F4
F5
F6
F7
F8
F9
FlO
Fll
Fl2
Fl3
Fl5 Fl6
Fl7
Fl8 Fl9
F20 F22
F23
F24
F3 1
F32
Equipment Ampere
ESC control modu le 40
ESC cont rol module 40
Engine control module (gas-
15/30
oline/diesel)
Engine cooling, engine com-
ponents, auxiliary heater 5/10
coil relay (1+2), secondary
air injection pump relay
Engine components, tank 7.5/10/
system 15
Brake light sensor
5
Engine components, water 7.5/10/
pumps 15
Oxygen sensor 10/15
Engine components, ex-
haust door, glow t ime con-
5/10/20
trol module, SU LEV valve
Fuel injectors, fuel control
15/20
module
Auxiliary heater heating ele-
40
ment2
Auxi lia ry heater heating ele-
40
ment 3
Automatic transmission con- 15/30
trol 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)
Windshield wipers 30
Horn 10
Terminal SO diagnosis 5
Starter 30
Auxiliary heater heat ing ele-
40
ment 1
Vacuum pump 15
LED headlights 5

296 ~l :..:.: nd ~e ~x :._ ______________________________ _
Closing
Hood . ..... ... . ...... ... .. .. .... . 219
Panorama s unroof ..... ... .. .. .... .. 44
W indows ............... .... ...... 43
C losing/open ing
by remote con tro l . . . . . . . . . . . . . . . . . . 3 7
with the central locking switch ...... . . 39
with the convenience key . . . . . . . . . . . . . 38
with the door lock ........ .. .. .... .. 39
Cockpi t (ove rview) . . . . . . . . . . . . . . . . . . . . 8
Cold ti re i nflat ion pressure ....... .. .. . 240
Com ing home . .. .. ..... ... .. .. .... .. 48
Compartmen ts .......... .. .... .. .. .. 6 1
Compass in the mirror .......... .. .. .. 54
Comp liance .. ... .. ..... ... .. .. .... . 292
Consumer Info rmation . . . . . . . . . . 133, 289
Consumpt ion (fue l) . . . . . . . . . . . . . . . . . . 28
Cont acting NH TSA ......... .. .. .... . 133
Conve nience key
Eme rgency operation . . . . . . . . . . . . . . . . 79
I nd icator light . . . . . . . . . . . . . . . . . . . . . 79
St arti ng the eng ine (START ENG INE ST OP
b utton) .. .. ............. .. .. .. .. .. 77
S topping the engine (S TAR T EN GIN E
STO P button) .. . ...... ... .. .. .... .. 78
Switching the ign ition on . ... .. .... . . 77
un locking/locking ........ .. .. .. .. .. 38
Conve nien ce opening/closing .. .. .. .. . . 43
Convertible c hild safety seats .. .. .... . 177
Conve rtible locking retracto r
Activating .. ... .. ..... ... .. .. .... . 183
Deactivating . . . . . . . . . . . . . . . . . . . . . . 184
Using to secure a c hild safety seat l81, 183
Coolant
refer to Engine coo la nt . ... .. .. .... . 225
Cooling mode (automatic climate control
sys tem) . .. .... ............. .. .... .. 70
Cooling mode (manua l cl imate control sys-
tem) ........ .......... ...... ... .. .. 69
Cooling system Adding coolant . ... .... ... .. .. .. .. . 226
Coolant leve l check ing ....... .. .... . 226
Coolant temperature indicator .. .. .... 12
Ind icator light . . . . . . . . . . . . . . . . . . . . . 20
Cornering light .. .. ..... ... .. .. .... .. 4 7
C rash data recorde r (ED R) ... .. .. .. .. . 189 Cruise cont
ro l system
Changing speed . ... ... ..... ... .. .. . 84
Desc ription . ... .. ... .. ..... ... .. .. . 83
Preselect ing speed ............. .... . 84
Switching off .. .. ............. .... . 85
switching on . . . . . . . . . . . . . . . . . . . . . . . 84
C u p ho lde rs ..... .. ... .. ..... ... .. .. . 61
C ur rent co nsu mption . . . . . . . . . . . . . 27, 28
D
Data recorde r . . . . . . . . . . . . . . . . . 189, 195
Date disp lay . ..... .. ... ..... ... .. .. . 10
D ayt ime run ning lights ........... .... . 46
Declarat ion of compliance
Adaptive cruise control ............. 292
Audi s ide ass ist .. ... .. .. ... ..... .. 292
Cell phone package ... ...... ... .. .. 292
C onvenience key ... .......... .... .. 29 2
El ec tronic immob ilizer ...... .... .. .. 292
Homelin k unive rsal remo te con trol ... 2 92
Remote contro l key .. .. ..... ... .. .. 292
Defect ive light bu lb wa rni ng
I n di cator lig ht . .. ............. .... . 25
Defrost ing (windshie ld)
automatic climate control system . . . . . 71
ma nual cl imate co ntrol system ....... . 69
DEF (instr ument cluster) . ..... ... .. .. . 11
Del uxe a utomat ic cli mate control
refer to Clima te con trol sys tem ( auto -
matic) . ... .... .. ... .. .. ..... ... .. . 70
Dete rm ining co rrect load limit .. .. .. .. 250
Diesel Indicato r light . .. ... ...... .... .... . 23
Prewarm ing (bu tton) ......... .... .. . 77
P rewarm ing (key) . .......... ...... .. 74
Diesel f uel .. .... .. .. .... .... ... .. .. 211
D iesel pa rticula te filter ... ... .... .. .. 1 99
Digital compass . . . . . . . . . . . . . . . . . . . . . 54
D imens ions ..... .. .. .... .... ... .. .. 287
D im ming the rearview m irror ... .. .. .. . 53
Distance ... .. .. .. ............. .... . 28
D oor/re ar lid w arning ............ .. .. . 27
Door contact sw itch . . . . . . . . . . . . . . . . . . 49
Doors Child safety lock (mechanical) . ... .. .. . 42

306 Index
Winter operation Battery .... ................ ..... . 228
Cooling system ............ ... .... . 225
W inter t ires .. ...... ....... .. .. .. .. . 261
All -wheel drive ........... .. .. .... . 261
W inter use
Car washes . .............. ... .. ... 205
defrost ing the w indshield (automatic cl i­
mate control system) . . . . . . . . . . . . . . . . 71
Remov ing ice from windows .. .. .. ... 207
Seat heating . . . . . . . . . . . . . . . . . . . . . . . 72
X
Xenon-Lights .............. .. .. .. .. . 279
Xenon headlights . . . . . . . . . . . . . . . . 46, 49