2014 AUDI A5 CABRIOLET cooling

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
quires 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 anticorrosion 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 cool­
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 antifreeze protection and cooling efficien­
cy. If the coolant frost protection is too low,
the coolant could freeze and damage the vehi­ cle heating and engine cooling system.
For year-round driving, antifreeze is added at
the factory for temperatures down to:
- -31°F(-35°C)USA
- -40 °F ( - 40 °C) Canada.
If you must add coolant, use a mixture of wa­
ter and coolant additive. Mixing the coolant
additive with distilled water is recommended.
& WARNING
Before you check anything in the engine
compartment, always read and heed all
WARNINGS¢ .&.
in Working in the engine
compartment on page 206.
(D Note
- Before winter sets in, have the coolant
checked to see if the coolant additive in
Checking and filling 213
your vehicle is sufficient to meet the cli­
mate conditions. This is especially impor­
tant if you live in a region where the win­
ter is extremely cold. 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 Vehicle
Limited Warranty.
Checking the engine coolant level
The engine coolant level can be checked with
a quick glance.
Fig. 178 Eng ine compartment: Cover on the coolant
expansion tank
"' Before you check anything in the engine
compartment,
always read and heed all
WARNINGS ¢ .&, in Working in the engine
compartment on page 206.
"'Park your vehicle on a level surface .
.,. Turn off the ignition.
.,. Read the engine coolant level from the cool­
ant expansion tank ¢
fig. 178, ¢ page 208,
fig. 175.
With a cold engine, the coolant Iii>

214 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 208.
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 t he 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
sea led 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 206 .
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 213 , fig. 178 and carefully turn
the cap counter-clockwise
c:> .&_ .
.,.. Add coo lant m ixed in the correct rat io
c:> page 213, 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 213, 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 213 must be re­
stored as soon as possible.
Checking and filling 215
'
@) 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. •
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Child restraints
Dang er of using chi ld rest raints in th e
front seat . . . . . . . . . . . . . . . . . . . . . . . .
141
Where can I get addit ional information
about child restra ints and their use? . .
178
Child restra int system anchors ... .. .. . 175
Ch ild safety .. ................ ... ... 16 1
Convertible locking retractor . . . . . . . . . 17 1
Important safety instr uctions fo r using
ch ild safety seats ......... .. .. .. .. .
164
Important things to know when dr iv ing
with chi ld ren .... ..... ... .. .. .. ...
16 1
Instal ling a chi ld restraint using the
LATCH system ............ .... .. .. .
177
Lower anchorages ........ .. .. .. .. . 176
Mounti ng and releasing the anchorage
hook .. .. ... ............. ...... ..
177
Ch ild safety seats ... .... ... .. .. .. ... 167
Booster seats ............ .... .. ... 169
Convertible c hild seats .... .. .. .. .. . 168
Convertible locking retracto r . . . . . . . . . 171
Danger of us ing ch ild restra ints in the
front seat . . . . . . . . . . . . . . . . . . . . . . . .
141
H ow do I proper ly install a child safety
· h' l 7 164 se at in my ve 1c e ......... .. .. .. .. .
I nfant sea ts ............. .. .. .. .. .
167
Ins tal ling .. .... .. .... ... .. .. .. ... 17 1
LA TCH system .. .. ..... ... .. .. .. ... 177
Safety inst ructions ..... ... .. .. .... . 164
Unused safety belts on the rear seat . . 166
Cigare tte lig hte r . . . . . . . . . . . . . . . . . . . . . 65
C lea ning .................... ... ... 195
Climate controls . . . . . . . . . . . . . . . . . . . . . 69
Climate con trol sys tem
Automatic recircula tion . . . . . . . . . . . . . .
72
Supp lementary hea ter . . . . . . . . . . . . . . . 72
synchron izing ... ...... ... .. .. .. .... 7 2
C lock ..... ... ...... ............. ... 12
Closing
Power windows .......... .. .. .. .. ..
39
C losing/opening
at t he lock cylinder ..... ... .. .. .. .. ..
36
by remote contro l . . . . . . . . . . . . . . . . . . 34
with the central locking switch .. .. .. .. 35
with the convenience key ... .. .. .. .. .. 35
Cold ti re in flat ion pressure ... .. .. .. .. . 22 6
Com ing home .............. ... ... ... 52 Inde
x 271
Compact spa re tire .... .. ..... ... .. .. 2 4 3
also refer to Spare tire ... .... ... .. .. 243
Compass in the m irror ............... . 58
Compliance ... .. .. ................. 267
Cons umer Information . . . . . . . . . . 129, 264
Contacting NHTSA . .. ... ....... .... . 129
Controls
Cleaning .. .. .. .. .................
197
Convenience key
Ind icator lights .. .. . ... .... ... .. .. .
78
Starting engine (S TART E NGINE STOP
button) ... .. .. .. .. .. .. ...... ... .. .
77
Stopping the eng ine (START ENGINE
STOP button) . . . . . . . . . . . . . . . . . . . . . .
78
Switching on ignition .............. .. 77
unlocking/lock ing .. . .. .... ... ... .. . 35
Convenience opening/clos ing
Co nve rtib le child safety se ats
Convertib le locking retractor .. ... .. .. . 40
168
Activating . . . . . . . . . . . . . . . . . . . . . . . . 173
Deact ivating . .. .... ... ....... ..... 173
U sing to secu re a child safety seat 1.71, 173
Coolant system .. .. ................. 213
Cooling mode (automat ic climate control) 70
Cooling System Expansion tank ... .. ...............
213
Cornering light .. .. ................. . Sl
C ruise cont ro l
Changi ng speed ..... .. ..... ... .. .. .
8 3
Presett ing your speed .. ..... ... .. .. . 84
Switching off . ..... . .. .. ..... ... .. . 84
Switching on . .. .. ................. . 83
Cruising range . . . . . . . . . . . . . . . . . . . . . . . 25
(upholder ........ .. ..... ........... 66
D
Data recorder
Date d isp lay 179
. . .. .... .. .. ...... ... .. . 12
Daytime runn ing lights . . . . . . . . . . . . 51, 52
Decla rat ion of compliance
Adaptive cruise control ........... ..
267
Audi s ide ass ist ...... ............. 267
Cell phone package .. .. .. .. ... ... .. 267
Co nvenience key .................. . 267
Electronic immob ilizer ......... .... . 267
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