2015 AUDI S3 SEDAN cooling

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Trailer mode Driving with a trailer
General information
Your Audi was designed primarily for passenger
transportation .
If you plan to tow a tra iler, p lease remember that
the additiona l load will affect d urability, econo­
my and performance .
T railer towing not on ly places more stress on the
vehicle, it a lso calls for more concentrat ion from
the dr iver .
F or this reason, a lways fo llow the operating and
d riving instructions 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 suitable
for your vehicle and trai ler and must be mounted
securely on the veh icle 's chassis at a technically
sound
location . Use on ly a tra iler hitc h with a re­
movable ba ll mou nt. Always chec k w ith the t ra il­
e r hitch m anu fac tur er to make sure that you a re
using the co rrec t hitch.
Do not use a bumper hitch .
The hitch must be installed in such a way that it
does not i nterfere wit h the impact -absorbi ng
bumper system. No mod ificat ions should b e
mad e to the vehicle exhaust and brake systems .
Fr om time to t ime, c hec k t hat a ll h itch mou nti ng
bo lts remain sec urely fastened .
When you are no t tow ing a trailer,
remove the
trai ler hitch ball mount . Th is prevents the hitc h
fr om caus ing damage should you r vehicle be
s truck from behind~,&. .
Trailer brakes
If yo ur tra iler is equipped w it h a braking system,
check to be s ure that it conforms to all regu la­
tions.
Trailer mode
T he trailer hyd raulic brake system must not be di ­
rect ly connected to the ve hicle's hydraulic b rake
system .
Safety chains
Always use s afe ty chains be tween your ve hicle
and the tra ile r.
Trailer lights
Tra ile r li ghts must meet all regulations. Be sure
to check w it h your Aud i dea le r fo r corr ect w irin g,
swi tches and relays.
Mirrors
If you a re unable to see the traffic behind you us­
i ng the regular o uts ide mirrors, then you
must in ­
sta ll extended mirrors .
It is importa nt that you
always have clea r vision to the rea r.
_&. WARNING
Afte r removing the trailer hit ch, d o no t store
i t in yo ur vehicle. In ca se of sudden br akin g,
the hitch could fly fo rward and inju re you or
your 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 raile r is held secure ly in
pla ce to p revent it from shift ing forward, back­
ward or sideways .
Never allow a pas senger to ride in a trailer~.&.
in Driving instructions on page 92.
Engine cooling system
Towing a trailer makes the engine work harder . It
is important tha t the cooling system 's pe rform­
ance is up to the additional load. Make s ure that
the coo ling system has enoug h flu id.
Tire pressure
When towing a trailer, inflate the tires of your ve-
hicle to the cold tire pressure listed under "Full
lilJJ..
91

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-Drain th e oi l into a container desi gned for
this purpose, one large enough to ho ld at
least the total amount of oil in your engine .
- Engine oil is poisonous . Keep it well out of
the reach of children.
- Continuo us contact with used engine oil is
harmful to your sk in. A lways protect your
sk in by washing oil off thoroughly w ith soap
and water.
(D Note
Never mix oi l addit ives with your engine oi l.
These additives can damage your eng ine and
adversely affect your Audi Limited New Veh i­
cle Warranty .
@) For the sake of the environment
-Before changing your oi l, f irst make sure
you know where you can properly dispose of
the used oil.
- Always d ispose of used engine oil proper ly.
Do not dump it on garden soil, wooded
areas, into open streams or down sewage
d rains .
- Recycle used e ngine oi l by taking it to a used
engine oil collection facility in your area, or
contact a service 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 and generally re ­
q ui res lit tle atten tion.
The cooling system has been filled at the factory
w ith a pe rma nen t coolan t which does no t need to
be ch anged . T he coolant consists o f a mixture o f
specia lly condit ioned wa ter and the man ufactu r­
er's glycol -based coolant additive Gl3 antifreeze
with anticor rosion add itives (SO% for USA mod­
e ls · 60% for Canadian models) . Th is m ixture bot h
'
assures the nece ssary fros t protection and p ro-
tects meta l components in the engine 's cooling
Checking and Fillin g
system from corrosion and scaling . It also raises
t h e boiling point of the coo lant .
D o no t redu ce the con cen tra tion of the coolan t in
the summer by ad ding plain water.
The prop or­
tion of coolant additive mu st be at least 50%
but not more than 60%
to maintai n antifr eeze
protection and cooling efficiency . If the coo lant
frost pro tec tion is too low, the coo lant co uld
freeze and damage the vehicle heating and en­
gine cooling system .
For year- ro und driving, antifreeze is added at the
factory for temperatures down to :
-- 31°F(-3S° C)USA
- -40 °F ( - 40 ° C) C anada.
If you must add coolant, use a mixture of water
and coolant additiv e. Mix ing the coo lant add it ive
with dis tilled wa te r is recommended .
A WARNING
Befo re you c hec k anythi ng i n the engi ne com ­
partment, always re ad and heed a ll WA RN­
IN GS
~page 198.
(D Note
- Befor e wi nter sets in , have the coo la nt
c hecke d to see if the cool an t additive in you r
vehicle is sufficient to meet the climate con ­
ditions . This is espec ia lly impo rtant if you
live in a region where the winter is extreme ­
ly cold . If necessary, increase the proportion
of coolant additive to 60%.
- When adding coolant additive to yo ur cool ­
ing system, remember:
- We recommend us ing o nly coo la nt addi­
tive G12 ++ o r G13 ( che ck the label) fo r
your ve hicl e. This coolant addi tive is av ail­
a ble at autho rized Aud i dea le rs . Othe r
types of ant ifreeze can significant ly re­
d uce corrosion protection. The resulting
corrosion can ca use a loss o f coolant and
serious engine damage.
- Do not add any type of rad iator leak sealant
to y our vehicle's engine coolant. Adding ra­
diator repa ir fluid may adversely affect the
function and perfo rmance of your cooling .,,.
205

Checking and Fill in g
system and could result in damage not cov­
ered by your New Vehicle Limited Warranty.
Adding coolant
Fig. 162 Eng ine compartment: ma rkings on the coola nt
expans ion tank
Read an d follo wing the WARNINGS before
checking anything in the engine compartment
r::;,page 198.
Checking the engine coolant level
.. Park your vehicle on a level surface.
.. switch the ignition off.
.. Read the coolant level on the coolant expansion
tank
r::;, fig . 162 . The coolant level must be be ­
tween the mark ings when the engine in cold .
When the engine is warm it can be slightly
above the upper marking .
Adding coolant
Requirement: there must be a residual amount of
coolant in the expans ion tank
c> Q).
.. Let the engine cool down.
.. Place a cloth over the coolant expansion tank
cap and unscrew the cap counterclockwise
<=>& .
.,. Add coolant mixed in the correct ratio
r::;, page 205 up to the upper marking .
.. Make sure that the fluid level rema ins stable.
Add more coolant if necessary.
.. Close the cap secure ly.
A coolant loss s uggests a leak. Immediate ly drive
your veh icle to an authorized A udi dealer or au­
thor ized Audi Service Facility and have the cool­
ing system inspected.
If the cooling system is not
leaking, a loss can come from the coolant boiling
206
thro ugh ove rheating and being pushed out o f the
cooling system.
A WARNING
The cooling system is pressurized and can be­
come very hot. To reduce the risk of burns
from hot coolant:
- Do not open the coolant expansion tank cap
w ith the engine hot. There is a risk of burns .
- Stop the eng ine and a llow it to cool.
- Protect your face, hands and arms from es-
caping coolant and steam by covering the
coo lant tank cap with a large, thick cloth.
- Turn the coolant tank cap counterclockwise
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 e x­
haust system or hot engine components.
The ethy lene glycol in engine coola nt can
catch fire under certa in circumstances.
- The coolant additive and the coolant can be
dangerous to your health. For this reason,
keep the coolant in the o riginal container
away from ch ildren . The re is a risk of poison­
ing .
- W hen working in the engine compartment,
remember that the rad iator fa n can switch
on ev en if the ignition is switched off, wh ich
increases the risk of pe rsonal injury.
@ Note
Do not add coolant if the expans ion tank is
empty . Air cou ld enter the cooling system and
damage the eng ine. If this is the case, do not
continue driving. See an author ized Audi deal ­
er or a uth ori zed Audi Service Facility for a ssis­
ta nce .
. Radiator fan
The radiator fan switches on automatically by it­
self
An a uxiliary electric radiato r fan switches on and
off depending on coolan t temperature and other
vehicle ope rat ing cond itions .
After yo u sw itch the engine off, the aux ilia ry fan
can continue running for up to 10 m inutes -even .,,.

Fuses and bulbs
No. Equipment
F49 Starter, clutch sensor,
headlight relay coil
F53 Rear window defogger
The power seats* are protected via
circuit break­
ers
that automatically switch on after a few sec­
onds after the overload has been reduced.
(0 Tips
Note that the following table was accurate at
the time of printing and is subject to change.
Left engine compartment fuse assignment
Fig. 187 Engine compartmen t: fuse assig nme nt
No. Equipment
Fl ESC control module
F2 ESC control module
F3 Engine control module (gasoline/diesel)
Engine cooling, engine components, auxili-
F4 ary heater coil relay (1+2), secondary a ir
injection pump relay
FS Engine components, tank system
F6 Brake light sensor
F7 Engine components, water pumps
F8 Oxygen sensor
250
No. Equipment
F9 E
ngine components, exhaust door, glow
time control module, SULEV valve
Fl0 Fuel injectors, fuel control module
Fll Auxiliary heater heating element 2
F12 Auxiliary heater heating element 3
F13 Automatic transmission control module
FlS Horn
F16 Ign ition coil
F17 ESC
control module, engine contro l mod-
ule
F18 Terminal 30 (reference voltage)
F19 Windshie
ld wipers
F20 Horn
F22 Terminal 50 diagnosis
F23 Starter
F24 Auxiliary heater heating element 1
F31 Vacuum pump
F32 L
ED headlights
(!') Tips
Note that the following tab le was accurate at
the time of printing and is subject to change.
Bulbs
Replacing light bulbs
For your safety , we recommend that you have
your authorized Audi dealer replace burned out
bulbs for you.
It i s becoming increasingly more and more diffi­
cu lt to replace vehicle light bulbs s ince in many
cases, other parts of the car must first be re­
moved before you are able to get to the bulb.
This applies especially to the light bulbs in the
front of your car which you can only reach
through the engine compartment.
Sheet meta l and bulb holders can have sharp
edges that can cause serious cuts, and pa rts
must be correctly taken apart and then properly
put back together to help prevent breakage of
parts and long term damage from water that can .,,_

with the convenience key. . . . . . . . . . . . . . . 36
with the door lock . . . . . . . . . . . . . . . . . . . . 3 7
Cockpit (overview) . . . . . . . . . . . . . . . . . . . . . . 8
Coming home . . . . . . . . . . . . . . . . . . . . . . . . . 45
Compartments . . . . . . . . . . . . . . . . . . . . . . . . 58
Compass in the mirror . . . . . . . . . . . . . . . . . . 51
Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . 265
Consumer information . . . . . . . . . . . . . . . . . 262
Consumer Information . . . . . . . . . . . . . . . . . 138
Consumption (fuel) . . . . . . . . . . . . . . . . . . . . 28
Contacting NHTSA . . . . . . . . . . . . . . . . . . . . 138
Convenience key Emergency operation . . . . . . . . . . . . . . . . . . 77
Indicator light . . . . . . . . . . . . . . . . . . . . . . . 77
Starting the engine (START ENGINE STOP button) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Stopping the engine (STAR T ENGIN E STOP
button) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Sw itching on the ignit ion . . . . . . . . . . . . . . 75
un locking/locking . . . . . . . . . . . . . . . . . . . . 36
Convenience opening/closing . . . . . . . . . . . . 41
Convertible child safety seats . . . . . . . . . . . 179
Convertible locking retractor
Activating . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Deact ivating . . . . . . . . . . . . . . . . . . . . . . . . 185
Using to secure a child safety seat . . . . . . 184
Coolant
refer to Engine coolant . . . . . . . . . . . . . . . 205
Cooling mode (automatic climate control sys-
tem) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Cooling mode (manua l climate control sys -
tem)................................. 65
Cooling system Adding coolant . . . . . . . . . . . . . . . . . . . . . . 206
Coolant leve l checking . . . . . . . . . . . . . . . . 206
Coolant temperature indicator . . . . . . . . . . 12
Indicator light . . . . . . . . . . . . . . . . . . . . . . . 19
Cornering light . . . . . . . . . . . . . . . . . . . . . . . . 43
Cruise control system Changing speed . . . . . . . . . . . . . . . . . . . . . . 95
D escr iption . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Preselecting speed . . . . . . . . . . . . . . . . . . . . 95
Sw itch ing off . . . . . . . . . . . . . . . . . . . . . . . . 95
~ switching on . . . . . . . . . . . . . . . . . . . . . . . . . 95 0
iii Cup holders . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 ,....,
~ Current consumpt ion ................ 27, 28
Vl
Vl
,....,
Index
D
Data recorder . . . . . . . . . . . . . . . . . . . . . . . . 122
Date display . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Daytime running lights. . . . . . . . . . . . . . . . . . 43
Declaration of compliance
Adaptive cruise control . . . . . . . . . . . . . . . 265
Audi side assist . . . . . . . . . . . . . . . . . . . . . 265
Cell phone package . . . . . . . . . . . . . . . . . . 265
Convenience key . . . . . . . . . . . . . . . . . . . . . 265
E le ctronic immobili zer . . . . . . . . . . . . . . . . 265
Homelink universal remote control . . . . . 265
Remote control key . . . . . . . . . . . . . . . . . . 265
Defective light bulb warning
Indicator light . . . . . . . . . . . . . . . . . . . . . . . 24
Defrost ing (windshield)
automatic climate control system . . . . . . . 67
manual climate control system . . . . . . . . . . 65
DEF (instrument cluster) . . . . . . . . . . . . . . . . 11
Deluxe automatic cl imate control
refer to Climate control system (automatic) .66
Determining correct load limit . . . . . . . . . . 228
Diesel
Indicator light . . . . . . . . . . . . . . . . . . . . . . . 22
Preheating (button) . . . . . . . . . . . . . . . . . . . 75
Preheating (key) . . . . . . . . . . . . . . . . . . . . . . 73
Diesel fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Diesel particulate filter . . . . . . . . . . . . . . . . 195
Digital compass . . . . . . . . . . . . . . . . . . . . . . . 51
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Dimming the rearview mirror . . . . . . . . . . . . 48
Distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Door/luggage compartment lid warning . . . 27
Door contact sw itch . . . . . . . . . . . . . . . . . . . . 46
Doors Child safety lock (mechanical) . . . . . . . . . . . 40
Driver informa tion system . . . . . . . . . . . . . . . 27
Boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
CD/rad io display . . . . . . . . . . . . . . . . . . . . . . 27
Door/luggage compartment lid warning . . 27
Efficie ncy program . . . . . . . . . . . . . . . . . . . . 29
Engine oil temperature indicator . . . . . . . . 30
Indicator lights . . . . . . . . . . . . . . . . . . . . . . 13
Lap timer . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
On -board computer . . . . . . . . . . . . . . . . . . . 28
Outside temperature display . . . . . . . . . . . . 27
269

Index
w
Warning/ indicator lights
System indicator light (MIL) . . . . . . . . . . . . 22
Warn ing/Ind icator lights
A irbag system . . . . . . . . . . . . . . . . . . . . . . 160
PASSENG ER AIR BAG OFF . . . . . . . . . . . . . 160
Warn ing lights
refer to Indicator lights . . . . . . . . . . . . . . . . 1 3
Warranty coverages . . . . . . . . . . . . . . . . . . . 262
Washer fluid level (indicator l igh t) . . . . . . . . 24
Washing matte finish paint . . . . . . . . . . . . . 235
Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
What happens if you wear your safety belt too
loose? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
What happens to unbelted occupants? . . . . 141
What impairs driving sa fety? . . . . . . . . . . . . 13 1
Wheel bolts . . . . . . . . . . . . . . . . . . . . . . . . . 229
Wheels . .. .. .. ................. .. ... 214
All wheel dr ive . . . . . . . . . . . . . . . . . . . . . . 127
Clea ning . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Glossa ry of t ire and load ing terminology . 216
Replacing . . . . . . . . . . . . . . . . . . . . . . . . . . 24 1
Ti res and vehicle load limits . . . . . . . . . . . 227
Wheel wrench . . . . . . . . . . . . . . . . . . . . . . . . 241
When mus t a safety belt be rep laced? . . . . 1 42
When must the airbag system be inspected? 1.60
Where are lower anchorages located? . . . . . 186
W indows
C lea ning/remov ing ice ................ 237
W indshield
cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
defrosting (automatic climate cont rol sys-
tem) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
defrosting (man ual climate contro l system) .65
also refer to Windshield . . . . . . . . . . . . . . . 4 9
W indshield washe r system .......... 49, 212
Fil ling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
Reservoir capacity . . . . . . . . . . . . . . . . . . . 260
W indshield wipers
Clea ning wipe r blades . . . . . . . . . . . . . . . . . 50
Folding up . . . . . . . . . . . . . . . . . . . . . . . . . . 50
I ndicato r light . . . . . . . . . . . . . . . . . . . . . . . 24
Replacing w indshield wiper blades . . . . . . . 50
Sw itching on and off . . . . . . . . . . . . . . . . . . 49
278
Win ter driving
Snow chains . . . . . . . . . . . . . . . . . . . . . . . . 230
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Win ter operation
B att ery . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Cooling system . . . . . . . . . . . . . . . . . . . . . . 205
Windshie ld washer system . . . . . . . . . . . . 212
Winter t ires . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Winter use
Car washes . . . . . . . . . . . . . . . . . . . . . . . . . 235
defrost ing the windsh ield (automat ic cli -
mate control system) . . . . . . . . . . . . . . . . . . 67
Remov ing ice from windows . . . . . . . . . . . 237
Seat heating . . . . . . . . . . . . . . . . . . . . . . . . . 68
X
Xenon-L ights . . . . . . . . . . . . . . . . . . . . . . . . . 250
Xenon headlights . . . . . . . . . . . . . . . . . . . 43, 46