cooling AUDI S4 2016 User Guide

Check ing and F illing
blink until you add coolant and the level has been
restored to normal. Even though there is an e lec ­
tr ic coolant level sensor, we still recommend you
check the coo lant level from time to time.
Coolant los s
Coolant loss may indicate a l e ak in the cooling
system. In the event of coolant loss, the cooling
syst em should be insp ected immediately by your
authorized Audi dealer. It is not enough merely
to add coolant.
I n a
s e aled system, losses can occur only if the
boiling point of the coo lant is exceeded as a re­
sult of overheating.
A 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 eng ine and allow it to cool
down .
- Protect your face, hands and arms from es­
caping 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 apply ing
l ight, downward pressure on the top of the
cap .
- To avo id being burned, do not sp ill anti ­
freeze or coolant on the exhaust system or
hot eng ine parts . Under certain conditions,
the ethy lene g lycol i n engine coolant can
catch fire.
{Q) Note
Do not add any type of radiator leak seala nt
to your veh icle's engine coolant . Adding radia­
to r repa ir fluid may adversely affec t the func­
tion and performance of yo ur 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 anyth ing in the eng ine compart­
ment,
a lwa ys re ad an d heed all WARNINGS
210
¢ A in Working in the engine compartment on
page 203.
Requireme nt: The re must be a res idual amount
of coo lant in the expans ion tank
~CD-
.,,. Turn off the engine .
.,,. Let the engine cool down.
.,,. Place a thick rag over the coolan t expa nsion
tank ¢ page 209, fig. 184 and
carefull y turn
the cap counter-clockwise ¢.&_ .
.,,. Add coo lant mixed in the correct ratio
~ page 208, Coolant up to the MAX marking.
.,,. Make sure that the fluid level remains stab le.
Add more coolant if necessary .
.,,. Twist the cap on aga in tightly.
Replacement engine coolant must conform to ex­
act specifications ¢ page 208, Coolan t.
We recommend using only coo lant additive
G l2 +
+ , Gl3
or in an emergency Gl2+. Do not use a
different additive . In an emergency use plain wa ­
ter unt il you can get the correct addit ive and can
restore the correct rat io. Th is should be done as
soon as possible.
If you have lost a considerable amount of cool­
ant, then you should add cold antifreeze and cold
water only when the engine is cold.
Always use new engine coo lant when refilling .
Do not fi ll coolant above the "MAX " mark. Excess
coolant will be forced out th rough the pressure
relief valve in the cap when the engine becomes
hot.
A 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 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 s low ly and very ca refully in a
counter-clo ckwise direction wh ile app ly ing
li ght, downward pressure on the top o f
the cap.
~

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N
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I.Cl U"I ,....,
I.Cl ,....,
-To avoid being burned, do not spill anti­
freeze or coolant on the exhaust system or hot engine parts. Under certain condi­
tions, the ethylene glycol in engine cool­ ant can catch fire.
- Antifreeze is poisonous. Always store anti­
freeze 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 container
clearly marked "poison".
(D Note
-Do not add coolant if the expansion tank is
empty . Air could enter the cooling system
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 coolant will be
forced out through the pressure relief valve
in the cap when the engine becomes hot.
- If, in an emergency, only water can be add­
ed, the correct ratio between water and an­
tifreeze
c::> page 208 must be restored as
soon as possible.
@) For the sake of the environment
Drained coolant should not be reused. Always
dispose of used coolant while observing all
environmental regulations.
Radiator fan
The radiator fan switches on automatically by it­
self.
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 cool­
ant.
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
Checking and Filling
with the ignition off. It can even switch on again
later by itself
c::> & , if
- the temperature of the engine coolant rises due
to the heat build-up from the engine in the en­
gine compartment, or
- the engine compartment heats up because the
vehicle is parked in intense sunlight.
A WARNING
-To reduce the risk of personal injury never
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 auto­
matically when the engine coolant reaches a
certain temperature and will continue to run
until the coolant temperature drops.
Brake fluid
Checking brake fluid level
The broke fluid level con be checked with o quick
glance .
Fig. 185 En gi ne compartmen t: Cover on the b rake fl uid
reservoir
Before you check anything in the engine compart ­
ment,
always read and heed all WARNINGS
c::> _.& in Working in the engine comportment on
page 203.
.,. Read the brake fluid level from the brake fluid
reservoir
c::> fig. 185, c::> page 205, fig . 181 . The
brake fluid level must be between the "MIN"
and "MAX" markings.
211

Index
Child safety locks Power windows . . . . . . . . . . . . . . . . . . . . . .
41
Rear doors . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Ch ild safety seats
Booster seats . . . . . . . . . . . . . . . . . . . . . . .
166
Convertible child seats . . . . . . . . . . . . . . . 164
Danger of using child restraints in the front
seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
139
How do I properly install a child safety seat
in my vehicle? . . . . . . . . . . . . . . . . . . . . . . .
161
Infant seats . . . . . . . . . . . . . . . . . . . . . . . . 163
LATCH system . . . . . . . . . . . . . . . . . . . . . . 172
Safety instructions . . . . . . . . . . . . . . . . . . . 161
Unused safety belts on the rear seat . . . . 163
Child seats . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 67
Cigarette lighter . . . . . . . . . . . . . . . . . . . . . . . 64
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Cleaning/removing ice from windows . . . . . 195
Cleaning Alcantara . . . . . . . . . . . . . . . . . . . . 196
Cleaning artificial leather . . . . . . . . . . . . . . . 196
Cleaning carbon parts . . . . . . . . . . . . . 195, 196
Clean ing contro ls . . . . . . . . . . . . . . . . . . . . . 195
Cleaning decorative parts/trim . . . . . . . . . . 195
Cleaning decorative parts and trim . . . . . . .
194
Cleaning displays . . . . . . . . . . . . . . . . . . . . . 195
Cleaning exhaust tail pipes . . . . . . . . . . . . . 194
Clean ing plast ic parts . . . . . . . . . . . . . . . . . . 195
Cleaning rims . . . . . . . . . . . . . . . . . . . . . . . . 194
Cleaning seat covers . . . . . . . . . . . . . . . . . . . 196
Clean ing textiles ... ............ .... .. . 196
Cleaning the tail lights . . . . . . . . . . . . . . . . . 194
Climate control system . . . . . . . . . . . . . . . . . 76
Automatic recirculation . . . . . . . . . . . . . . . . 79
Supplementary heater . . . . . . . . . . . . . . . . . 79
synchroni zing . . . . . . . . . . . . . . . . . . . . . . . . 79
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Closing/opening
at the lock cylinder. . . . . . . . . . . . . . . . . . . .
36
by remote control . . . . . . . . . . . . . . . . . . . . 34
with the centra l locking sw itch . . . . . . . . . . 35
with the convenience key . . . . . . . . . . . . . . . 34
Coming home . . . . . . . . . . . . . . . . . . . . . . . . . 49
Compact spare tire . . . . . . . . . . . . . . . . . . . . 237
also refer to Spare tire . . . . . . . . . . . . . . . 23 7
Compartments . . . . . . . . . . . . . . . . . . . . . . . .
66
264
Compass in the mirror . . . . . . . . . . . . . . . . . . 57
Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Consumer information . . . . . . . . . . . . . . . . . 258
Consumer Information . . . . . . . . . . . . . . . . . 128
Contacting NHTSA . . . . . . . . . . . . . . . . . . . . 128
Convenience key
Ind icator lights . . . . . . . . . . . . . . . . . . . . . .
84
Starting engine (START ENGIN E STOP but-
ton) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
83
Stopping the engine (START ENGINE STOP
button) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
84
Switching on ignition . . . . . . . . . . . . . . . . . . 83
unlocking/locking . . . . . . . . . . . . . . . . . . . . 34
Convenience opening/closing
Convertible child safety seats
Convertible locking retractor 42
164
Activating . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Deact ivating . . . . . . . . . . . . . . . . . . . . . . . . 170
Using to secure a child safety seat . . . . . . 169
Coolant system . . . . . . . . . . . . . . . . . . . . . . . 208
Cooling mode (automatic climate control) . . 77
Cooling System
Expansion tank . . . . . . . . . . . . . . . . . . . . . .
209
Cornering light . . . . . . . . . . . . . . . . . . . . . . . . 48
Cruise control
Changing speed . . . . . . . . . . . . . . . . . . . . . .
89
Presetting your speed . . . . . . . . . . . . . . . . . 89
Switching off . . . . . . . . . . . . . . . . . . . . . . . . 89
Switching on . . . . . . . . . . . . . . . . . . . . . . . . . 88
Cruising range . . . . . . . . . . . . . . . . . . . . . . . . . 24
(upholder . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
D
Data recorder . . . . . . . . . . . . . . . . . . . . . . . . 176
Date display . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Dayt ime running lights . . . . . . . . . . . . . . 48 , 49
Declaration of compliance
Adaptive cruise control . . . . . . . . . . . . . . .
261
Audi side assist . . . . . . . . . . . . . . . . . . . . . 261
Cell phone package . . . . . . . . . . . . . . . . . . 261
Convenience key . . . . . . . . . . . . . . . . . . . . . 261
Electronic immobilizer. . . . . . . . . . . . . . . . 261
Homelink universal remote contro l . . . . . 261
Remote control key . . . . . . . . . . . . . . . . . . 261
Defective light bulb warning . . . . . . . . . . . . . 21
Defrosting (windows) . . . . . . . . . . . . . . . . . . . 78