2014 AUDI S4 radiator

-To reduce the r isk of being burned, never
open the hood if you see or hear steam
or coolant escaping from the engine
compartment . Wait until no steam or
coolant can be seen or heard before ca re­
fully opening the hood .
- Keep children away from the engine com ­
partment.
- Never spill flu ids on hot engine compo­
nents. They can cause a fire .
- Never touch the radiator fan. The aux ili­
ary e lectr ic fan is temperature controlled
and can switch on suddenly .
- Never open the coolant reservoir cap
when the eng ine is still warm . The cool­
ant system is pressur ized and hot coo l­
ant could spray out.
- Protect your face, hands and arm from
steam or hot eng ine coolant by placing a
thic k rag over the cap when you open the
coolant reservoir.
- Do not remove the engine cover under
any c ircumstances. Th is increases the
risk of bu rns.
- If wo rk on the fuel system or the electri­
cal sys tem is ne cessary:
- Always disconnect the battery.
- Never smoke or work near heaters or
open flames . Fluids in the engine com­
partment co uld start a fire.
- Keep an approved fire extinguisher im­
mediately ava ilable.
- To avoid electrical s hock and persona l 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 repa ir
with the engine running:
- Fir st, fully apply the parking brake,
move se lector lever of a utomatic trans-
Checkin g and fillin g 215
mission to "P" (Park); put manual
transmission in Neutral.
- Always use extreme caution to prevent
clothing, jewe lry, or long hair from get­
ting caught in the radiator fan, V-be lts
or other moving parts, or from contact­ i ng hot parts . Tie back hair before
starting, and do not wear clothing that
will hang o r droop into the engine .
- Minimize exposure to emission and
chemical hazards~&. .
A WARNING
California Proposition 65 Warning:
- Engine exhaust, some of its const ituents,
a nd certain vehicle components contain
or emit chemicals known to the State of
Ca lifornia to cause cance r and birth de­
fects and reproductive harm. In addition, certain fl uids contained in veh icles and
certain products of component wear con­
tain or emit chemica ls known to the
State of California to cause cancer and
birth defects or other reproductive harm.
- Battery posts, terminals and related ac­
cessories conta in lead and lead com­
pounds, chemicals known to the State of
California to cause cancer and reproduc­
tive harms. Wash hands afte r handling.
Q) Note
When adding f lu ids, always make sure that
they are poured into the proper conta iner
or f iller opening, otherwise serious dam­
age to vehicle systems w ill occur .
@ For the sake of the environment
To detect leaks in time, inspect the vehicle
floor pan from underneath regular ly . If
you see spots from oil or other veh icle flu­
i ds, have your vehicle inspected by an au­
thorized Audi dealer. •
•

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 coolant which does not need to be changed. The coolant consists of a
mixture of specially conditioned water and the
manufacturer's glycol-based coolant addi-
tive G13 antifreeze with anticorros ion addi­
tives (50% for USA models; 60% for Canadian
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 also raises the boil ­
ing point of the coolant.
Do not reduce the concentration of 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 protection is too low,
the coolant could freeze and damage the vehi ­
cle heating and eng ine 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 you check anything in the engine
compartment, always read and heed all
WARNINGS
c::;, .&. in Working in the engine
compartment on page 214.
(D Note
- Before winter sets in, have the coolant
checked to see if the coolant additive in
Checkin g and fillin g 221
your vehicle is sufficient to meet the cli ­
mate conditions. This is especia lly impor­
tant if you live in a region where the win­
ter is extremely co ld. If necessary, in­
crease the proportion of coolant additive
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 radiator leak seal­
ant to your vehicle's engine coolant.
Adding radiator repair fluid may adverse­
ly affect the function and performance of
your cooling system and could result in
damage not covered by your New Veh icle
Limited Warranty.
Checking the engine coolant level
The engine coolant level can be checked with
a quick glance.
Fig. 185 En gin e compar tment: Cover on the coo la n t
expansio n tan k
"' Before you check anything in the engine
compa rtme nt,
always read and heed all
WARNINGS c::;, .&, in Working in the engine
compartment on page 214.
"'Park your vehicle on a level su rface .
.,. Turn off the ignition .
.,. Read the engine coolant level from the cool­
ant expansion tank
i=> fig . 185, c::;, page 216,
fig . 182. With a cold engine, the coolant Iii>

222 Check ing and filling
level should be between the "MIN" and
"MAX" markings. When the engine is warm,
the leve l may be slightly above the "MAX"
marking .
The location of the coolant expansion tank
can be seen in the engine compartment illus­
tration
c:> page 216.
To obtain an accurate reading, the engine must be switched
off.
The expansion tank in you r vehicle is equipped
with an e lectric coolant level sensor.
When the coolant level is too low, the warning light in the Auto-Check System
c:> page 17will
b link until you add coo lant and the level has
been restored to no rma l. Even though there is
an electric coolant level sensor, we still rec ­
ommend you check the coolant leve l from
time to time.
Coolant loss
Coolant loss may indicate a leak in the cool ing
system. In the event of coolant loss, the cool ­
ing system should be inspected immediately
by your authorized A udi dealer.
It is not
enough merely to add coolant.
I n a sealed system, losses can occur only if
the boiling point of the coolant is exceeded as
a result of overheat ing.
A WARNING
The cooling system is unde r 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
dow n.
- Protect yo ur 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 wh ile ap­
plying light, downward pressure on the
top of the cap .
- To avoid be ing burned, do not spill ant i­
freeze or coolant on the exhaust system
'
or hot engine parts. Under certa in cond i­
tions, the ethylene glycol in engine coo l­
ant can catch fire.
(D Note
Do not a dd any type of radiator leak sea l­
ant to your veh icle's engine coolant. Add ­
i ng radiator repa ir fl uid may adverse ly af­
fect the funct ion and performance of your
cooling system and could result in damage
not covered by your New Veh icle L imited
War ranty .
Adding coolant
Be very careful when adding engine coolant.
Before you check anyth ing in the eng ine com­
partment, always read and heed all WARN­
INGS
c:> A in Working in the engine compart­
ment on page 214 .
Requirement: There m ust be a res idual
amount of coo lant in the expans ion tank
c:> (]) .
.,.. Turn off the eng ine .
.,.. Let the engin e cool down.
.,.. Place a thick rag over the coo lant expansion
tank
c:> page 221 , fig. 185 and carefully turn
the cap counter-clockwise
c:> .&_ .
.,.. Add coo lant m ixed in the correct rat io
c:> page 221, Coolant up to the MAX ma rk­
ing.
.,.. Mak e s ure t hat the fl uid leve l remains sta-
b le. Add more coo lant if necessary.
.,.. Twist the cap on again
tightly .
Replacement engine coo lant must confo rm to
ex act spec ific at ions
c:> page 221, Coolant.
We recommend using only coolant add it ive
G12 ++, G13 or i n an emergency G 12+. Do
not
use a different add it ive. In an emergen cy use
plain wa ter until yo u can ge t the correct addi­
tive and can restore t he correct ratio. This
sho uld be done as soon as possib le .
If you have los t a cons iderab le amount o f
coolant, the n you sho uld add cold ant ifree ze
and co ld wate r on ly when the engine is cold.
Always use
n ew engine coo la nt w hen refilling . .,.

Do not fill coolant above the "MAX" mark. Ex­
cess coolant will be forced out through the pressure relief valve in the cap when the en­
gine becomes hot .
_& WARNING
-The cooling system is under pressure and
can get very hot. Reduce the risk of
scalding from hot coolant by following
these steps .
- Turn
off the engine and allow itto 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
applying light, downward pressure on
the top of the cap .
- To avoid being burned, do not spill an­
tifreeze or coolant on the exhaust sys­
tem or hot engine parts . Under certain
conditions, the ethylene glycol in en­
gine coolant can catch fire.
- Antifreeze is poisonous. Always store an­
tifreeze in its original container and well
out of the reach of children.
- If you drain the coolant, it must be
caught and safely stored in a proper con ­
tainer clearly marked "poison".
(D Note
- Do not add coolant if the expansion tank
is empty. Air could enter the cooling sys­
tem and damage the engine. If this is
the case, do not continue driving . Seek
professional assistance.
- Coolant pollutes the environment and
could cause an engine fire . Excess cool­
ant will be forced out through the pres­
sure relief valve in the cap when the en­
gine becomes hot.
- If, in an emergency, only water can be
added, the correct ratio between water
and antifreeze ¢
page 221 must be re­
stored as soon as possible.
Checking and filling 223
'
@) For the sake of the environment
Drained coolant should not be reused. Al­
ways dispose of used coolant while observ­
ing all environmental regulations.
Radiator fan
The radiator fan switches on automatically by
itself .
The radiator fan is driven by the engine via the
V-belt. The viscous clutch regulates the speed
of the fan according to the temperature of the coolant.
An auxiliary electric radiator fan* switches on
and
off depending on coolant temperature
and other vehicle operating conditions.
After you switch the engine
off, the auxiliary
fan can continue running for up to 10 minutes
- even with the ignition
off. It can even switch
on again later by itself ¢.&. , if
- the temperature of the engine coolant rises
du e to the h eat build-up from th e engin e in
the engine compartment, or
- the engine compartment heats up because
the vehicle is parked in intense sunlight.
_& WARNING ~
-To reduce the risk of personal injury nev-
er touch the radiator fan .
- The auxiliary electric fan is temperature
controlled and can switch on suddenly
even when the engine is not running.
- The auxiliary radiator fan switches on au­
tomatically when the engine coolant reaches a certain temperature and will
continue to run until the coolant temper­
ature drops. •
•

284 Index
Starting with jumper cab les . ....... . 266
Stopping . . . . . . . . . . . . . . . . . . . . . . 82, 84
E ng ine compartment
Safety instructions ...... .. .. .. .. .. . 214
Working the engine compartment 214
Eng ine coolant
Indicator light . . . . . . . . . . . . . . . . . . . . . 17
E ngine coolant system ...... .. .. .... . 221
Adding coolant ........... .. .. .. .. . 222
Checking coolant level ..... .. .. .. .. . 221
Check ing the eng ine coolant level .. .. . 221
Radiator fan .............. ... .. .. . 223
E ngine coolant temperature
Temperature gauge ....... .. .. .... .. 10
Engine hood
C losing ......... ......... ... .... . 214
How to release the hood ............ 214
E ng ine oil . .... ........... ........ . 216
Adding .. .. ............. .. .. .. .. . 219
Addit ives ... ................ ..... . 219
Changing . ................. ..... . 220
Check oil level ............ ... .... . 219
Consumption ............ .. .. .. .. . 219
Indicator light . . . . . . . . . . . . . . . . . 17, 21
Oil consumption ............ .. .... . 218
Oil grades .. ................ ... .. . 216
Pressure malfunction ...... .. .. .. .. . . 17
Sensor defective . . . . . . . . . . . . . . . . . . . . 21
Specification and viscos ity .. .. .. .... . 216
Engine speed limitation . . . . . . . . . . . . . . . 21
Environment Break- in period ............ ... .... . 195
Cata lytic converter ............ .. .. . 196
Disposing of your vehicle battery ..... 228
Driving at high speeds ..... .. .. .. .. . 197
Driving to minimize pollution and noise 197
Fuel ..... .. ..... ........... ... .. . 212
Fuel economy ............. ... .. .. . 197
L eaks under your veh icle . .. .. .. .. .. . 214
L ett ing the vehicle stand and wa rm up . 198
Proper disposal of drained brake fluid . 224
Proper disposal of drained engine coo l-
ant ..... .. ................ ..... . 222
Proper disposal of dra ined engine
oil . . . . . . . . . . . . . . . . . . . . . . . . . 219, 220
Recycling used engine oil ... .. .. .. .. . 219
Roof rack .. ... .... ...... .. .. .. .. .. 68 Unleaded fuel
.... ................ . 209
What shou ld I do with an o ld battery? . 228
EPC
refer to E lectronic power control . . . . . . 20
Ethyl alcohol (Fuel) . .. .. ...... ... .. .. 210
Event Data Recorder (EDR) ............ 186
Exhaust tail pipes
Cleaning .. .... .. ............. .... 205
Expansion tank .... ............. .... 221
Exterior lighting ... ................ .. 47
Exterior m irrors
Adjust ing . .. .. .. .. ........... .. .. . SO
Dimming .. .... .. ............. ..... 51
Heating . .. .. .. . .............. .. .. . SO
F
Fan
Radiator 223
Fastening Booster seats . . . . . . . . . . . . . . . . . . . . . 17 5
Convertib le child safety seats .. ... ... 174
Infant seats ... .. ... .......... .... 173
Fa stening eye s
refer to Tie-downs . . . . . . . . . . . . . . . . . . 72
Flat tire Changing ..... .. ................ . 255
flexib le fue l ....... ............. .... 210
Floor .. .... .... .. ................. . 74
Floor mats . ..... .. ................ . 133
Fog lights/rear fog light(s) ......... ... . 47
Folding the rear seats ............ .... . 69
Foot pedals . .... .. ............. .... 133
For the sake of the environment Gasoline fumes and the env ironment .. 212
Letting the engine warm up . . . . . . 80, 83
Refueling . .. .. .. ... .......... .... 212
Sav ing fuel by early upshifting . .. .. .. . 11
Front airbags Description .. .. .. .......... ...... . 150
How they work . .. .......... ...... . 155
Frontal collisions and the laws of physics 139
Front passenger's door emergency lock ing 38
Front seats Adjusting ... .. .. ....... ...... .. .. 130
Child restraints in the front seat .. .. .. 147

288 Index
Parking system 116
Rear .. .... ............... .. .... . 116
Rear, w ith rear v iew camera ... .. .... . 118
Parking system (rear) ..... .. .. .. .. .. . 116
Ad justing the warning tones .. .. .... . 117
Parking system (rear, w ith rear view cam-
era) Parking mode 1 ........ .. .. .. .. .. . 120
Parking mode 2 .......... .. .. .... . 121
Safety precautions ...... .. .. .. .. .. . 118
Switching on/off .......... ... .... . 119
Switching rear view camera on/off ... . 122
Partition net . . . . . . . . . . . . . . . . . . . . 70, 71
Parts replacement ......... .. .. .... . 277
Pass-through . . . . . . . . . . . . . . . . . . . . . . . . 73
PASSENGER AIR BAG OFF light ... .. .. . 157
Passive safety system ........ ... .... . 128
Pedals .. .. .. .. . .......... .. .. .. .. . 133
Physical principles of a frontal collision 139
Plastic parts Cleaning ... ................ ..... . 206
Polishing .. .... ............. .. .... . 206
Pollutant filter (automatic AC system) ... 76
Power seat adjustment . . . . . . . . . . . . . . . . . . . . 60
Power locking system . . . . . . . . . . . . . . . . . 32
E mergency locking ...... .. .. .. .. .. .. 38
Power windows .......... .. .. .. .. .. 43
Rear lid . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Selective unlock feature ......... .. .. 37
Settings ... ................ ..... .. 37
Sliding/tilting sunroof ....... .. .. .. .. 43
Power steering
re fer to Electro-mechanical power as-
sist .. ... ................. .. .... . 191
Power window
Conven ience opening/closing . .. .... .. 43
Power windows .............. .. .... .. 43
Child safety locks .......... ... .. .. .. 43
Malfunctions ............. ... .. .. .. 44
Pregnant women Special considerations when wearing a
safety belt . . . . . . . . . . . . . . . . . . . . . . . 143
Proper occupant seating positions .... . 129
Proper safety belt pos it ion . . . . . . . . . . . . 142 Proper seating position
Front passenger . ................. . 130
Occupants ... .. .. .. .............. . 129
Rear passengers .. ............. .... 131
Protecting ...... .. ............. .... 206
Protective liner .. .. ..... ........... .. 74
Q
Quartz clock . . . . . . . . . . . . . . . . . . . . . . . . 12
quattro
refer to all-wheel drive .......... ... 192
Question What happens to unbelted occupants? 139
Why safety belts? . . . . . . . . . . . . . . . . . 138
R
Radiator fan .. .. .. ............. .. .. 223
Rain/light senso r
Headlights .... .. ............. .... . 47
Intermittent (w indshield wipers) ...... 53
Sensor defective . . . . . . . . . . . . . . . . . . . . 22
Reading lights . . . . . . . . . . . . . . . . . . . . . . . 50
Rear door sun shade . . . . . . . . . . . . . . 52, 53
Rear fog lights ........... ......... .. 47
Rear lid
Automatic operation . . . . . . . . . . . . . . . . 40
Emergency release . . . . . . . . . . . . . . 41, 42
Escape handle . .. ............. .... . 42
Opening and closing ..... ...... .. .. . 39
Rear light Defective . . . . . . . . . . . . . . . . . . . . . . . . . 21
Rear view camera
Parking mode 1 .. ............. .... 120
Parking mode 2 .. ................ . 121
Rearviewmirror ... ..... ........... .. 51
Rear window heating ............ .... . 78
Rear window sun shade . . . . . . . . . . . . . . . 53
Rear window washer system ....... ... . 53
Recirculation mode (automatic climate
control) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Refuell ing .. .. .. .. .. ........... .... 212
Release lever for hood ........... .. .. 214
Remote control Homelink ..... .. ................ . 124