cooling AUDI A5 CABRIOLET 2015 User Guide

Checking and F ill in g
blink until you add coo lant and the level has been
restored to normal. Even though there is an e lec­
tr ic coo lant level sensor, we still recommend you
check the coo lant level from t ime to time.
Coolant los s
Coolant loss may indicate a leak in t he cooling
system. In the event of coolant loss, the cooling
system should be inspected immediately by your
authorized Audi dealer. It is not enough merely
to add coolant.
I n a
s e a led 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 engine and allow it to coo l
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-clockw ise d irection while applying
light, downward pressure on the top of the
cap.
- To avoid being burned, do not spill ant i­
freeze or coolant on the exhaust system or hot eng ine parts . Under ce rtain conditions,
the ethy lene g lycol in engine coolant can
catch fire.
{il) Note
Do not add any type of rad iator leak sealant
to your veh icle's engine coolant . Adding radia­
to r repair f lu id may adverse ly affect the func­
tion and performance of your cooling system
and could resu lt 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 compart­
ment,
alway s re ad an d heed all WARN ING S
202
¢ A in Working in the engine compartment on
page 195.
Req uirement: There must be a res idual amo unt
of coo lant in the expans ion tank
~CD-
.,,. Turn off the engine .
.,,. Let the engine cool down.
.,,. Place a thick rag ove r the coolant expansion
tank ¢
page 201, fig. 175 and car efull y turn
the cap counter-clockwise
~ .&_ .
.,,. Add coo lant mixed in the correct ratio
~ page 200, Coolant up to the MAX marking .
.,,. Make sure that the flu id level remains stab le.
Add more coolant if necessa ry .
.,,. Twist the cap on aga in
tightly .
Replacement engine coo lant must conform to ex­
act specifications ¢
page 200, Coolan t.
We recommend using only coo lant additive Gl2 +
+ , 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 additive and can
restore the correct ratio. This should be done as
soon as possible .
If you have lost a considerab le amount of cool­
ant, then you should add cold antifree ze and cold
water only when the engine is cold.
Always use
new engine coo lant when refilling.
Do not fil l coolant above the "MAX " mark. Excess
coolant will be forced out through 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 eng ine and allow it to coo l
down.
- Protect you r 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 ve ry carefully in a
counter-clockw ise direction wh ile app ly ing
li ght, downward p ressu re on the top o f
the cap. ..,,.

M N
ci LL co
rl I.O
"' N
"' rl
-To avoid being burned, do not spi ll 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 conta iner and well out
of the reach of ch ildren .
-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 eng ine .
If this is the case,
do not continue driving. Seek profess ional
ass istance.
- Coolant pollutes the env ironment and could
cause an eng ine fire . Excess coolant will be
fo rced out through the pressure relief valve
i n the cap when the eng ine becomes hot.
- If, i n an emergency , only water can be add­
ed, the correct ratio between wa ter and an­
tifreeze
~ page 200 must be restored as
soon as possib le .
@) For the sake of the environment
Drained coolant should not be reused. Always
dispose o f used coolant while observ ing 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
be lt . The viscous clu tch regulates the speed of
the fan ac cording to the temperature of the cool ­
ant.
An auxiliary e lectr ic rad iator fan* switches on and
off depend ing on coolant temperat ure and othe r
veh icle operati ng conditions.
Afte r you switch the engine off, the auxiliary fan
can continue runn ing for up to 10 minutes -even
Ch eck in g and Fillin g
with the ignition off . It can even switch on again
later by itself¢& , if
- the temperatu re of the engine coo lant rises due
to the heat build- up from the engine in the en­
gine compartment, or
- the engine compartment heats up because the
veh icle is parked in intense sun light .
A WARNING
-To reduce the risk of persona l injury never
touch the radiator fan .
- The auxiliary electric fan is temperature con­ trolled and can switch on suddenly even
when the engine is not running.
- The a uxiliary radiator fan sw itches on auto­
matica lly 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 brake fluid level can be checked with a quick
glance .
Fig. 17 6 Engine compar tment : Cove r on the b rake fl uid
r e servoir
Before you check anyth ing in the engine compart ­
ment,
al way s read and h eed all WARNIN GS
¢ _.& in Working in the engine compartment on
page 195 .
.,. Read the brake fluid level from the b rake fluid
reservoir ¢
fig. 176, ¢ page 197, fig . 172 . The
brake fluid level must be between the
"MIN "
and "MAX " markings.
20 3

Index
Lower anchorages . . . . . . . . . . . . . . . . . . . 166
Mounting and releasing the anchorage
hook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
167
Ch ild safety seats
Booster seats . . . . . . . . . . . . . . . . . . . . . . .
160
Convertible child seats . . . . . . . . . . . . . . . 158
Danger of using child restraints in the front
seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
133
How do I properly install a child safety seat
in my vehicle? . . . . . . . . . . . . . . . . . . . . . . .
155
Infant seats . . . . . . . . . . . . . . . . . . . . . . . . 157
LATCH system . . . . . . . . . . . . . . . . . . . . . . . 167
Safety instructions . . . . . . . . . . . . . . . . . . . 155
Unused safety belts on the rear seat . . . . 157
Child seats . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Cigarette lighter . . . . . . . . . . . . . . . . . . . . . . . 64
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Cleaning/removing ice from windows . . . . . 186
Cleaning Alcantara . . . . . . . . . . . . . . . . . . . . 187
Cleaning artificial leather . . . . . . . . . . . . . . . 187
Cleaning carbon parts . . . . . . . . . . . . . 186, 187
Clean ing controls . . . . . . . . . . . . . . . . . . . . . 186
Cleaning decorative parts/trim . . . . . . . . . . 186
Cleaning decorative parts and trim . . . . . . .
186
Cleaning displays . . . . . . . . . . . . . . . . . . . . . 186
Cleaning exhaust tail pipes . . . . . . . . . . . . . 185
Clean ing plast ic parts . . . . . . . . . . . . . . . . . . 186
Cleaning rims . . . . . . . . . . . . . . . . . . . . . . . . 185
Cleaning seat covers . . . . . . . . . . . . . . . . . . . 187
Clean ing textiles . . . . . . . . . . . . . . . . . . . . . . 187
Cleaning the tail lights . . . . . . . . . . . . . . . . . 185
Cleaning the wind deflector . . . . . . . . . . . . . 186
Climate control system . . . . . . . . . . . . . . . . . 68
Automatic recirculation . . . . . . . . . . . . . . . . 71
Supplementary heater............. .. .. 71
synchron izing . . . . . . . . . . . . . . . . . . . . . . . . 71
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Closing/opening
at the lock cylinder . . . . . . . . . . . . . . . . . . . .
34
by remote contro l . . . . . . . . . . . . . . . . . . . . 32
with the central locking switch . . . . . . . . . . 33
with the convenience key . . . . . . . . . . . . . . . 32
Coming home . . . . . . . . . . . . . . . . . . . . . . . . . 51
Compact spare t ire . . . . . . . . . . . . . . . . . . . . 229
also refer to Spare tire . . . . . . . . . . . . . . . . 229
254
Compass in the mirror . . . . . . . . . . . . . . . . . . 57
Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Consumer information . . . . . . . . . . . . . . . . . 248
Consumer Information ............... . .
Contacting NHTSA
Convenience key 120
120
Ind icator lights . . . . . . . . . . . . . . . . . . . . . . 77
Starting engine (START ENGINE STOP but-
ton) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
75
Stopping the engine (START ENGINE STOP
button) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
76
Switching on ignition . . . . . . . . . . . . . . . . . . 75
unlocking/locking . . . . . . . . . . . . . . . . . . . . 32
Convenience opening/closing
Convertib le child safety seats
Convertible locking retractor 37
158
Activating . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Deact ivating . . . . . . . . . . . . . . . . . . . . . . . . 164
Using to secure a child safety seat . . . . . . 163
Coolant system . . . . . . . . . . . . . . . . . . . . . . . 200
Cooling mode (automatic climate control) . . 69
Cooling System
Expansion tank . . . . . . . . . . . . . . . . . . . . . .
201
Cornering light . . . . . . . . . . . . . . . . . . . . . . . . 50
Cruise control
Changing speed . . . . . . . . . . . . . . . . . . . . . .
81
Presetting your speed . . . . . . . . . . . . . . . . . 82
Switching off . . . . . . . . . . . . . . . . . . . . . . . . 82
Switching on . . . . . . . . . . . . . . . . . . . . . . . . . 81
Cruising range . . . . . . . . . . . . . . . . . . . . . . . . . 24
(upholder . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
D
Data recorder . . . . . . . . . . . . . . . . . . . . . . . . 169
Date display . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Daytime running lights ............... SO , 51
Declaration of compliance
Adaptive cruise control . . . . . . . . . . . . . . .
251
Audi side assist . . . . . . . . . . . . . . . . . . . . . 251
Cell phone package . . . . . . . . . . . . . . . . . . 251
Convenience key . . . . . . . . . . . . . . . . . . . . . 251
Electronic immob ilizer . . . . . . . . . . . . . . . . 251
Homelink universal remote control ..... 251
Remote control key . . . . . . . . . . . . . . . . . . 251
Defective light bulb warning . . . . . . . . . . . . . 21
Defrosting (windows) . . . . . . . . . . . . . . . . . . . 70