cooling AUDI RS5 CABRIOLET 2015 User Guide

202 Checking and filling
Checking the engine coolant level and
adding coolant
Be very careful when adding engine coolant.
Fi g. 1 77 En g in e c ompart men t: C over on the coola nt
ex pan sion ta nk
Fig. 178 Engine co mpar tment : ma rkin gs in th e coolant
ex pan sio n ta nk
Before you che ck anything in the engi ne com­
partment,
a lwa ys r ead and heed all WARN­
INGS c> A in Working in the engine compart ­
ment on page
195.
The "M IN " und "MAX " mark ings a re found o n
the bi -level disc in the in terior of the coolant
expansion tank
¢ fig . 178.
.,. Pa rk you r vehi cle on a level sur face .
.,. Turn off t he igni tion.
.,. Let the engine coo l down .
.,. Place a thick rag over the coolant expansion
tank and
c a refully turn the cap cou nte r­
clockwise
c> _&. .
.,. Read the eng ine coolant level inside the
coolant expans io n tank
c> fig . 177,
c>page 197 , fig. 174 . With a cold engine,
the coolant level sho uld be betwe en the
" M IN " and "MAX " ma rkings <=>
fig. 178
-arrows- . W he n t he eng ine is wa rm, the lev­
el may be slightly
above the "MAX" marking . .,.
Add coo lant mixed in the correct rat io, if
necessary
c> page 201 . Coolant may be a
maxim um of 1 mm above the MAX marking .
.,. Twist the cap on again
tightly.
The location of the coo lant expansion tan k
can be seen i n the engine compartment illus ­
tration
c> page 197.
T o obtain an acc urate reading, the engine
must be sw itched off.
T he ex pan sion ta nk in your vehicle is eq uipped
with an ele ctric coo lant level senso r.
When the coolant level is too low , the wa rn ing
li ght in the Au to-Check System <=>
page 17 will
blink u nti l yo u ad d coolant and the level has
been restored to normal. Eve n t hough t here i s
an e lectri c coo lant level senso r, we still rec ­
ommend you check the coola nt level from
time to t ime.
Coolant loss
Coolant loss may indica te a leak in the cooling
system. In t he event o f coolant loss, the coo l­
i ng system shou ld be inspected immediately
by your a uthorized Audi dea ler . It is not
eno ugh mere ly to add coolant.
In a
sealed sys tem, losses can occur on ly i f
the boili ng point o f the coo lant is exceeded as
a res ult of overheating.
Adding coolant
Rep la cement engine coo la nt must conform to
exact spe cificat ions
c> page 201, Cool ant .
We recommend using only coolant add it ive
Gl 2++ , Gl3 or in an emergency G 12 +. Do not
use a diffe rent add itive. In an emerge ncy use
plain w ater until yo u can get the correc t addi­
tive a nd can res tore the cor rect ra tio. T hi s
sho uld be done as soon as possib le .
If you have lost a considerab le amou nt of
c oolant , the n you shoul d a dd cold an tifreeze
and co ld wate r on ly w hen the e ng ine is cold.
Always use
n ew engine coo lant w hen refilling .
Do not f ill coo la nt
above the "MA X" mark. Ex-
cess coolant will be forced o ut through the .,,_

M N
er
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co ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
pressure relie f valve in the cap when the en­
gine becomes hot.
A WARNING
- The cooling system is under pressure and
can get very hot. Reduce the risk of
sca lding from hot coolant by following
these steps .
- T urn off the engine and a llow it to cool
down.
- Protect your face, hands and arms from
escap ing flu id and steam by cover ing
the cap with a large, thick rag.
- Tu rn the cap slowly and very ca refully
in a counte r-clockw ise d irection while
applying light, downward p ress ure on
the top of the cap.
- To avo id being burned, do not sp ill an­
tifreeze or coolant on the exhaust sys­
tem or hot engine parts. Under certain
conditions, the ethylene glyco l in en­
g ine coolant can catch f ire.
- Antifreeze is poisonous. Always store an­
t ifreeze in its or iginal container and we ll
out of the reach of children.
- If you drain the coolant, it must be
caught and safely stored in a proper con­
tainer clear ly marked "poison".
Q) Note
- Do not add any type of radiator leak sea l­
ant to your veh icle's engine coolant.
Adding rad iator repair fluid may adverse­
l y affect the function and performance of
you r cooling system and could result in
damage not covered by your New Vehicle Limited Wa rra nty.
- Coolant pollutes the env ironment and
could cause an engine fire. Excess coo l­
ant w ill be forced ou t through the pres­
su re re lief va lve in the cap when the en­
gine becomes hot .
- If, in an emergency, only water can be
added, t he cor rect ratio between wate r
and an tifreeze<=> page 201 must be re ­
stored as soon as possib le .
Checkin g and fillin g 203
'
@) For the sake of the environment
Drained coolant sho uld not be reused. A l­
ways d ispose of used coolant while observ­
i ng a ll environmental regulations.
Radiator fan
The radiator fan switches on automatically by
itself .
T he radiator fan is dr iven by the engine via the
V-belt. The viscous clutch regulates the speed
of the fan according to the temperature of the coolant.
An a uxiliary electric radiator fan* switches on
and off depending on coolant temperature
and othe r vehicle ope rat ing cond it ions.
After yo u switch the eng ine off, the aux iliary
f an can continue running for up to 10 m inutes
- even with the ignition off. It can even switch
on again later by itself<=>.&. , if
- t he temperatu re of the engine coo lant rises
due to the heat build -up from the engine in
the engine compa rtment, or
- the engine compa rtment heats up because
the vehicle is parked in intense sunlight.
A WARNING
=
- To reduce the risk of personal inju ry nev-
er touch the radiator fan.
- The a uxiliary electric fan is tempe rat ure
contro lled and can switch on suddenly
even when the engine is not running.
- The a uxiliary radiator fan switches on a u­
tomatically when the engine coo lant
reaches a certain temperature and will
continue to run until the coo lant temper­
ature drops.
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co ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Child safety . ... .... .... ... .. .. .. ... 152
Convertible locking retractor . ... .. .. . 162
Important safety instructions for using
chi ld safety seats .................. 155
Important things to know when driv ing
with children ..................... 152
Instal ling a child restraint us ing the
L ATC H system ................... .. 168
L ower ancho rages ........ .. .. .. .. . 167
M ounti ng and releas ing the ancho rage
hook . ..... .. .. ... ..... ... .. .. ... 168
Ch ild safety seats .... ... ... .. .. .. .. . 158
Booste r seats ..................... 160
Conve rtible c hild seats ............. 159
Conver tible locking retrac tor .. .. .. .. . 16 2
D anger o f using c hild restra ints in the
fro nt sea t . . . . . . . . . . . . . . . . . . . . . . . . 132
H ow do I properly install a child safety
seat in my vehicle? ........ .. .. .. .. . 155
Infant seats . . . . . . . . . . . . . . . . . . . . . . 158
Install ing .. ............. .... .. ... 162
LATCH system ................... .. 168
Safety instructions . ......... .. .. .. . 155
Unused safety belts on the rear seat .. 157
Cigarette lighter . . . . . . . . . . . . . . . . . . . . . 65
Cle aning .......................... 184
Climate controls . . . . . . . . . . . . . . . . . . . . . 69
Climate control system Automatic recirculation . . . . . . . . . . . . . . 72
synchron iz ing ............ .... .. .... 72
Clock ..... .. .. ... .. ..... ... .. .. .... 12
Closing Powe r windows . . . . . . . . . . . . . . . . . . . . 38
C losing/opening
at t he lock cylinder ........ .. .. .. .. .. 35
by remote contro l ..... ..... .. .. .. .. 33
with the cen tral locking switch . . . . . . . . 34
with the convenience key . . . . . . . . . . . . . 34
Cold tire inflat ion pressure ... .. .. .. .. . 217
Com ing home ............. .... .. .. .. 52
Compass in the mirror ................ 58
Compliance . ... ... ..... ... .. .. .. ... 267
Consume r In fo rmat ion . . . . . . . . . . 120, 264
Contact ing N HTSA .................. 120
Controls Cleaning ... .. .... .... ... .. .. .. ... 187
Inde x 271
Convenience key
Indicator lights .. .. . ... .... ... .. .. . 77
Starting engine (START EN GINE STOP
button) ... .. .. .. ................. . 76
Stopping the engine (START ENGINE
S TOP button) . . . . . . . . . . . . . . . . . . . . . . 77
Switch ing on ignit ion ... .. ... ..... .. . 76
u nlocking/locking .................. 34
Convenience opening/clos ing
C onvertib le child sa fe ty se ats
Convertib le locking retractor 39
159
Activati ng .............. .......... 164
Deact ivat ing . .. .. .... ........... .. 164
U si ng to secu re a child safety seat 1.6 2, 16 4
Coolant system .. .. ............... .. 201
Cooling mode (automatic climate control) 70
Cooling System Expansion tank . .. ................. 202
Cornering light .. .. ................. . 51
Cruise cont ro l
Changi ng speed .... . .. ..... ... .. .. . 82
Presetting your speed ... .... ... .. .. . 82
Switching off .. .. .... ............. . 82
Swit ching on . .. .. .. ............... . 81
Cruising range . . . . . . . . . . . . . . . . . . . . . . . 24
(upholder .. .. .. .. .. . .. .... ...... .. . 65
D
Data recorder . . . . . . . . . . . . . . . . . . . . . . 170
Date disp lay . ... .... . ... ...... ... .. . 12
Dayt ime runn ing lights . . . . . . . . . . . . 51, 52
Declarat ion of compliance
Adaptive cruise control ............. 267
Audi side ass ist .. .. . .. .. ... ..... .. 267
Cell phone package ................ 267
Convenience key ................... 267
El ectronic immob ilizer . ......... .. .. 267
Homeli nk unive rsal remote con trol . .. 267
Remote con tro l key .. .. ..... ... .. .. 267
Decorat ive pa rts/tr im
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . 186
Defective light bu lb warning ........... 21
Defrost ing (windows) ............ .... . 71
Determ ining correct load limit ....... . 226
Digital cloc k . . . . . . . . . . . . . . . . . . . . . . . . 12
Digi tal compass . . . . . . . . . . . . . . . . . . . . . 58
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