2017 AUDI A5 CABRIOLET cooling

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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.
T he cooling system has been filled at the factory
with a permanent coolant which does not need to
be changed . The coolant consists of a mixture of
specially condit ioned water and the manufactur ­
er's glycol-basedcoolant add itive G 13 antifreeze
with anticorrosion additives (SO% for USA mod­
e ls; 60% for Canadian mode ls). This m ixture
both ass ures the necessa ry frost protection and
protects metal components in the engine's coo l­
ing system from corrosion and scaling .
It also
raises the boiling point of the coolant.
Do not red uce the concent ration of the coolant in
the summer by adding p lain water.
The propor­
tion of coolant addit ive mu st be at least 50 %
but not more than 60 %
to mainta in antifreeze
protection and cooling efficiency. If the coolant
frost protection is too low, the coolant could
freeze and damage the vehicle heating and en­
g ine cooling system .
For year-round driving, antifree ze is added at the
factory for temperatures down to :
- -31° F(- 3S°C)USA
- - 40 ° F ( - 40 °C) Canada.
If you must add coolant, use a m ixture of water
and coolant addit ive. M ixing the coolant additive
with d istilled water is recommended .
_& WARNING
Before you check anythi ng i n t he engine com­
partment, always read and heed all WARN ­
INGS
¢ .&. in Working in the engine compart­
ment on page 193 .
(D Note
-Befo re winter se ts in, have the coo lant
checked to see if the coolant additive in your
vehicle is sufficient to meet the cl imate con -
Check ing and Filling
ditions. This is especially important 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 your cool­
ing system, remember :
- We recommend us ing only coolant add i­
tive G12+ + or G13 for yo ur vehicle. This
coolant addit ive is avai lab le at aut horized
A udi dealers . O ther types of antifree ze can
significantly reduce corrosion pro tect ion .
The resulting corrosion can cause a loss of
coolant and serious engine damage.
- Do not add any type of radiator leak sealant
to your vehicle's engine coolant. Adding ra ­
diator repair fluid may adversely affect the
function and performance of your cooling system and cou ld resu lt in damage not cov­
ered by your New Veh icle Limited Warra nty .
Checking the engine coolant level
The engine coolant level can be checked with a
quick glance.
Fi g. 1 74 Engin e compar tmen t: Cover o n the coo la n t ex ­
pansion tank
.. Before you check anything in the eng ine com­
partment,
always r ead and heed all WARN­
INGS ¢ ,A in Working in the engine compart ­
ment on page 193 .
.. Par k your veh icle on a leve l sur face.
.. Tur n off t he ignit io n .
.. Read the eng ine coolan t leve l from the coo lant
expansion tank
¢ fig . 174, ¢page 195,
fig. 171 .
With a cold engine, the coo lant level
should be b etween the "MIN" and "MAX" mark­
ings. When the eng ine is warm, the level may
be slightly above the "MAX" marking. .,..
199

Check ing and F illing
The location of the coolant expansion tank can be
seen in the engine compartment illustration
¢ page 195.
To obtain an accura te reading, the eng ine must
be switched off .
The expans io n tank in your vehicle is equipped
with a n elec tric coolant level sensor.
When the coolant level is too low, the war ning
lig ht in the Auto-Check System¢
page 15 will
blin k until you add coo la nt and the level has bee n
restored to normal. Even t hou gh the re is an e lec­
tr ic coolant level sensor, we still re commend you
check the coo lant level from time to time .
Coolant loss
Coolant loss may indicate a leak in the cooling
system. I n the event of coolant loss, the cooling
system should be inspected immediately by your
author ized Audi dealer. It is not enough me rely
to add coolant.
I n a
se aled system, losses can occur only if the
boi ling point of the coo lant is ex ceeded as a re ­
sul t of over heat ing.
A WARNING
T he cooling system is unde r pressure and can
get very hot . Red uce the risk of scalding from
hot coolant by following these steps.
- Turn off the eng ine and a llow it to cool
down .
- Protect your face, hands and arms from es ­
caping fluid and steam by cove ring the ca p
with a la rge, thick rag.
- Turn the cap s lowly and very ca refu lly in a
counter-clockwise direction w hile ap ply ing
light, downwa rd pressure o n the top of the
cap.
- To avo id being burned, do not sp ill anti­
freeze or coolant on the exha ust system or
hot eng ine parts. Under certain conditions,
the ethy lene g lycol in e ngine coolant can
catch fire.
(D Note
Do not add any type of radiato r leak sealant
to your veh icle's engine coolant. Adding radia-
200
tor repair fluid may a dverse ly affect the func ­
tion and performance of your coo ling system
and could result in damage not covered by
your New Vehicle Limited Warranty.
Adding coolant
Be very careful when adding engine coolant.
Befo re yo u check any thing in the engine compart­
ment,
always read and heed all WARNINGS
¢ A in Working in the engine compartment on
page 193.
Requireme nt: The re mus t be a res idual amo unt
of coolant in the expans ion tank ¢(!) .
""Tur n off t he engine .
"" Let the eng ine cool down.
"" Pla ce a thick rag over the coolan t ex pan sio n
tank ¢
page 199, fig. 174 and carefull y turn
the cap counter-clockwise ¢,&. .
"" Add coolant m ixed in the cor rect rat io
¢page 199, Coolant up to the MAX ma rking.
"" Make sure that the fluid level remains stab le.
Add more coolant if necessa ry .
"" Twis t the cap o n aga in
tightly.
Replacement eng ine coolant must conform to ex­
act specifications ¢
page 199, Coolant.
We recommend using only coo lant ad ditive G 12+
+ , G13 or in an emergency G12+. Do
not use a
different additive. In an emergency use plain wa­
te r unt il you can get the cor rect addit ive and ca n
r esto re the cor rect rat io. Thi s should be done as
soon as possib le.
If you have lost a considerable amount of coo l­
an t, then you s hou ld add co ld a ntifreeze and cold
water only whe n the engine is co ld.
A lways use
new engine coo lant when ref illing.
Do no t fill c oolant above the "MAX" mark . Excess
coolant will be forced out th rough the pressure
r elief valve in the cap when the engine becomes
hot.
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A WARNING ,~
- The cooling system is under 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 coo l
down.
- Protect you r face, hands and arms from
escaping fluid and steam by cover ing the
cap with a large, thick rag.
- Turn the cap slowly and very carefully in a
counter-clockwise d irection while applying
light, downward p ressure on the top of
the cap.
- To avoid being burned, do not spill anti­
freeze or coolant on the exhaust system or
hot engine parts. Under certa in cond i­
tions, the ethylene glycol in eng ine cool­
ant can catch fire.
- Antifreeze is poisonous. Always store anti­
freeze in its orig inal container and well out
of the reach of children.
- If you dra in the coolant, it must be caught
and safely stored in a proper conta iner
clearly marked "poison".
- Do not add coolant if the expansion tank is
empty. Air cou ld enter the cooling system
and damage the eng ine. If this is the case,
do not continue driving . Seek professional
ass istance.
- Coolant pollutes the env ironment and could
cause an eng ine fire. Excess coolant will be
fo rced o ut through the pressure relief valve
i n the cap when the e ng ine be comes hot.
- If, in an emergency, only wate r can be add­
ed, the co rrect r atio betwee n wate r and an­
tifree ze
Q page 199 must be res to red as
soon as possib le.
{® For the sake of the environment
Dra ined coolant sho uld not be reused. Always
disp ose of used coolant while obse rving all
env ironment al regulat ions.
-
Ch eck ing and Filling
Rad iator 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 th e speed of
the fan accord ing to the temperature of the cool­
ant .
An auxiliary e lectr ic radiator fan* switches on and
off depending on coo lant temperature and other
vehicle operating conditions.
After you switch the engine
off, the auxiliary fan
can continue running for up to 10 m inutes -even
with the ignition
off. It can even switch on aga in
later by itself
Q .& , 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 beca use the
veh icle is parked in intense sunlight.
A WARNING
- To reduce the r isk of persona l injury neve r
touch the radia to r fan .
- The auxiliary e lectr ic fan is temperature
controlled and can switch on s uddenly even
when the engine is not ru nning .
- The a uxiliary radiator fan sw itches on auto­
mat ically when the eng ine coolant reaches a
certa in temperature a nd will continue to run
until the coolant temperature d rops.
201

Index
Lower anchorages . . . . . . . . . . . . . . . . . . . 164
Mounting and releasing the anchorage
hook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
165
Child safety seats
Boost er seats . . . . . . . . . . . . . . . . . . . . . . .
158
Convertible child seats . . . . . . . . . . . . . . . 156
Dang er of using child restraints in the front
seat.... ... .. .. ................ ....
131
How do I properly install a child safety seat
in my vehicle? . . . . . . . . . . . . . . . . . . . . . . .
153
Infant seats . . . . . . . . . . . . . . . . . . . . . . . . 155
LATCH system . . . . . . . . . . . . . . . . . . . . . . 165
Safety instructions . . . . . . . . . . . . . . . . . . . 153
Unused safety belts on the rear seat . . . . 155
Child seats . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Cigarette lighter . . . . . . . . . . . . . . . . . . . . . . . 62
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Cleaning/removing ice from windows . . . . . 184
Cleaning Alcantara . . . . . . . . . . . . . . . . . . . . 185
Cleaning artificial leather . . . . . . . . . . . . . . . 185
Cleaning carbon parts . . . . . . . . . . . . . 184, 185
Clean ing contro ls . . . . . . . . . . . . . . . . . . . . . 184
Cleaning decorative parts/trim . . . . . . . . . . 184
Cleaning decorative parts and trim . . . . . . .
184
Cleaning displays . . . . . . . . . . . . . . . . . . . . . 184
Cleaning exhaust tail pipes . . . . . . . . . . . . . 183
Clean ing plast ic parts . . . . . . . . . . . . . . . . . . 184
Cleaning rims . . . . . . . . . . . . . . . . . . . . . . . . 183
Cleaning seat covers . . . . . . . . . . . . . . . . . . . 185
Clean ing textiles . . . . . . . . . . . . . . . . . . . . . . 185
Cleaning the tail lights . . . . . . . . . . . . . . . . . 183
Cleaning the wind deflector . . . . . . . . . . . . . 184
Climate control system . . . . . . . . . . . . . . . . . 66
Automatic recircu lation . . . . . . . . . . . . . . . . 69
Supplementary heater . . . . . . . . . . . . . . . . . 69
synch ronizing . . . . . . . . . . . . . . . . . . . . . . . . 69
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Closing/opening
at the lock cylinder. . . . . . . . . . . . . . . . . . . .
32
by remote control . . . . . . . . . . . . . . . . . . . . 30
with the central locking sw itch . . . . . . . . . .
31
with the convenience key . . . . . . . . . . . . . . . 30
Coming home . . . . . . . . . . . . . . . . . . . . . . . . .
49
Compact spare tire . . . . . . . . . . . . . . . . . . . . 227
also refer to Spare tire . . . . . . . . . . . . . . . 227
252
Compass in the mirror . . . . . . . . . . . . . . . . . . 55
Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Consumer information . . . . . . . . . . . . . . . . . 246
Consumer Information .. ............. . .
Contacting NHTSA
Convenience key 118
118
Ind icator lights . . . . . . . . . . . . . . . . . . . . . . 75
Starting engine (START ENGINE STOP but-
ton) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
73
Stopping the engine (START ENGINE STOP
button) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
74
Switching on ignition ............... .. . 73
unlocking/locking . . . . . . . . . . . . . . . . . . . . 30
Convenience opening/closing
Conv ertible child safety seats
Convertible locking retractor
35
156
Activating . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Deact ivating . . . . . . . . . . . . . . . . . . . . . . . . 162
Using to secure a child safety seat . . . . . . 161
Coolant system . . . . . . . . . . . . . . . . . . . . . . . 199
Cooling mode (automatic climate control) . . 67
Cooling System
Expansion tank. .. .. .. .. ........... ..
199
Cornering light . . . . . . . . . . . . . . . . . . . . . . . . 48
Cruise control
Changing speed . . . . . . . . . . . . . . . . . . . . . . 80
Presetting your speed . . . . . . . . . . . . . . . . . 80
Switching off . . . . . . . . . . . . . . . . . . . . . . . . 80
Switching on . . . . . . . . . . . . . . . . . . . . . . . . .
79
Cruising range . . . . . . . . . . . . . . . . . . . . . . . . . 22
(upholder . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
D
Data recorder . . . . . . . . . . . . . . . . . . . . . . . . 169
Date display . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Dayt ime running lights . . . . . . . . . . . . . . 48 , 49
Declaration of compliance
Adaptive cruise control . . . . . . . . . . . . . . .
249
Audi side assist . . . . . . . . . . . . . . . . . . . . . 249
Cell phone package . . . . . . . . . . . . . . . . . . 249
Convenience key . . . . . . . . . . . . . . . . . . . . . 249
Electronic immobilizer. . . . . . . . . . . . . . . . 249
Homelink universal remote control . . . . . 249
Remote control key . . . . . . . . . . . . . . . . . . 249
Defective light bulb warning . . . . . . . . . . . . . 19
Defrosting (windows) . . . . . . . . . . . . . . . . . . . 68