cooling AUDI RS7 SPORTBACK 2014 User Guide

220 Check ing and filling
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 ant icorros ion 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 a lso raises the boil­
ing point of the coo lant.
D o not reduce the concentration o f the coo l­
ant in the summer by adding plain water .
The
proportion of coolant add it iv e mu st be at
lea st 50 % but not mo re than 60 %
to main­
tain antifree ze protection and cooling efficien­
cy. If the coolant frost protect ion is too low,
the coolant could freeze and damage the veh i­
cle heating and eng ine cooling system .
For year-round driving, antifree ze is added at
the factory for temperatures down to:
- -31° F(-35°C)USA
- - 40 ° F ( -40 °C) Canada.
I f you must add coo lant, use a m ixture of wa­
ter and coolant addit ive. Mixing the coolant
addit ive wi th dist illed wate r is recommended.
_& WARNING
Before yo u check any thing in the engine
compartment, always read and heed all
WARNINGS
¢ &. in Working in the engine
compartment on page 213.
(D Note
- Before winter se ts in, have the coolant
checked to see if the coolant additive in
-
your vehicle is sufficient to meet the cli­ mate conditions . This is especia lly impor ­
tant if you live in a reg ion where the win­
ter is extreme ly cold. If necessary, in­
crease the proportion of coolant add itive
to 60% .
- When adding coolant additive to your
cooling system , remember :
- We recommend us ing on ly coolant ad­
d it ive G12 ++ or G1 3 (check the labe l)
for your vehicle . This coolant additive is
avai lable at autho rized Audi dea lers .
Other types of antifreeze can signifi­
cantly reduce corrosion protection. The
resu lting corrosion can cause a loss of
coolant and serious engine damage .
- Do not add any type of rad iator leak seal­
ant to your vehicle's engine coolant.
Add ing radiator repa ir flu id may adverse ­
ly affect the function and performance of
your cooling system and could resu lt in
damage not covered by you r New Ve hicle
Limited War ran ty.
Checking the engine coolant level
The engine coolant level can be checked with
a quick glance.
F ig . 1 91 Engin e compar tmen t: cover o n th e coolant
expans io n tank
Befo re you check anyth ing in the engine com­
partment,
always r ead and he ed all WARN­
INGS
¢ &_ in Working in the engine compart­
ment on page 213.
.,. Park your vehicle on a level surface .
.,. Switch off the ignition .
.,. Read the engine coo lant level from the coo l­
a nt expansion tank¢
fig . 191, ¢ page 215, ..,.

fig. 188. With a cold engine, the coolant
lev el should be between the "min" and
"max" markings. When the engine is warm,
the level may be slightly above the "max"
marking .
The location of the coolant expansion tank
can be seen in the engine compartment illus ­
t ration
<=> page 215.
To obtain an accurate reading , the engine
must be switched
off.
The expansion tank in your vehicle is equipped
with an electric coolant level sensor.
When the coolant level is too low, the warning
light in the Auto-Check System<=>
page 15 will
illuminate until you add coolant and the level
has been restored to normal. Even though
there is an electric coolant level sensor, we
still recommend you check the coolant level
from time to time .
Coolant loss
Coolant loss may indicate a leak in the cooling
system. In the event of coolant loss, the cool­
ing system should be inspected immediately
by your authorized Audi dealer. It is not
enough merely to add coolant .
In a
sealed system, losses can occur only if
the boiling point of the coolant is exceeded as
a result of overheating.
&_ 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 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 ap ­
plying light, downward pressure on the
top of the cap.
Checking and filling 221
-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 .
(D Note
Do not add any type of radiator leak seal­
ant to your vehicle 's engine coolant. Add-
ing radiator repair fluid may adversely af­
fect the function and performance of your
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 anything in the engine com­
partment,
always read and heed all WARN­
INGS <=>.&. in Working in the engine compart­
ment on page 213.
"'Turn off the engine.
"'Let the engine cool down .
"' Place a thick rag over the coolant expansion
tank
<=> page 220, fig. 191 and carefully
twist the cap counter-clockwise <=>_& .
"'Add coolant mixed in the correct ratio
<=> page 220, Coolant.
"'Twist the cap on again tightly.
Replacement engine coolant must conform to
exact specifications <=>
page 220, Coolant.
We recommend using only coolant addi-
tive G12++, G13 or in an emergency G12+. Do
not use a different additive. In an emergency
use plain water until 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 considerable amount of
coolant , then you should add cold antifreeze
and cold water only when the engine is cold.
Always use
new engine coolant when refilling.
Do not fill coolant above the "MAX" mark. Ex -
cess coolant will be forced out through the ..,.
•
•

222 Checking and filling
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
sca lding 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
escap ing flu id and steam by cover ing
the cap with a large , thick rag .
- Tu rn the cap slowly and
very carefully
in a counter -clockwise direction while
applying light, downward pressure 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 glycol in en­
g ine coolant can catch fire.
- Antifreeze is poisonous. Always store an­
t ifreeze 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
ta iner clearly marked "poison".
(D Note
- Coolant po llutes the environment and
could cause an engine fire. Excess coo l­
ant will be forced out through the pres­
sure relief valve i n the cap when the en­
gine becomes hot .
- If, in an emergency, only water can be
added, the correct ratio between wate r
and antifreeze ~
page 220 must be re­
stored as soon as possib le.
@) For the sake of the environment
Dra ined 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 .
An auxilia ry electric r adiator fan switches on
and off depending on coolan t tempera ture
and other vehicle operat ing condit ions .
After you switch the engine off, the aux iliary
fan can continue running for up to 10 minutes
- even w ith the ignition off . It can even swi tch
on aga in later by itself
c> .&. , if
- the temperature of the engine coo lant rises
due to the heat build-up from the engine in
the engine compartmen t, 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 sw itch on suddenly
even when the engine is not running .
- The auxiliary radiator fan sw itches on au­
tomatically when the engine coo lant
reac hes a certain t emperature and wi ll
continue to run until the coolant temper­
a ture drops.
Brake fluid
Checking brake fluid level
Fi g. 19 2 Engin e compart ment: cover on t he bra ke fluid
re servoir
Ill>

Child restraints
Dang er of using chi ld rest raints in th e
front seat . . . . . . . . . . . . . . . . . . . . . . . . 144
Where can I get addit ional information
about child restra ints and their use? . . 186
Ch ild restra int system anchors ... .. .. . 182
Ch ild safety .. ................ ... ... 168
Convertible locking retracto r . . . . . . . . . 179
I mportant safety instr uctions fo r using
ch ild safety seats ......... .. .. .. .. . 172
I mportant things to know when dr iv ing
with chi ld ren .... ..... ... .. .. .. ... 168
T ether anchors . . . . . . . . . . . . . . . . . . . . 185
Tether straps ............ .... .. .. . 185
C hild safety loc k
Rear doors ..... .. .... ... .. .. .. .... 4 0
Ch ild safety seats . . . . . . . . . . . . . . . . . . . 17 4
B ooste r seats . .. .. .... ... .. .. .. .. . 177
Conver tible c hild seats .... .. .. .. .. . 175
Conve rtible locking re tra cto r .. .. .. .. . 179
H ow do I properly ins tall a child safety
seat in my vehicle? ..... ... .. .. .. .. . 172
Infant seats . . . . . . . . . . . . . . . . . . . . . . 17 4
Instal ling .. ............. .... .. ... 179
Instal ling a child restraint us ing the
LATC H system ... .... ... .. .. .. .. .. . 184
LA TC H system ............... ... ... 184
L ower ancho rages ......... ... ... .. 183
M ount ing and releas ing the ancho rage
hook .. .. .. .. ............. .. .. ... 184
Safety ins truc tions ........ .. .. .. .. . 172
Unused safety belts on the rear seat .. 17 4
Cigarette lig hter . . . . . . . . . . . . . . . . . . . . . 59
C leaning ... . ............. .... .. .. . 203
Climate con trol (four-zone)
Operation . . . . . . . . . . . . . . . . . . . . . . . . . 70
Clock ..... ... ...... ............. ... 26
C losing
Rear lid . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Sliding/tilting su nroof ..... .. .. .. .. .. 42
Cold ti re inflat ion pressure ... .. .. .. .. . 23 2
Com ing home ..... .. ...... .. .. .. .. .. 4 6
Compartments . ........... .. .. .. .... 60
Com plian ce .. ............. .... .. .. . 276
Consume r Info rmation . . . . . . . . . . 131, 273
Consumption (fue l) . . . . . . . . . . . . . . . . . . 24
Contact ing N HTSA ......... .. .. .. .. . 13 1
Inde x 279
Controls
Cleaning . ... .. .... . ... ...... ... .. 205
Convenie nce key . . . . . . . . . . . . . . . . . . . . . 36
Star ting the engine ............ .. .. . 74
Stopping the eng ine (STAR T ENGIN E
STOP b utton) .. .... . ... ...... ... .. . 7S
Switching the ignition on .... ... .. .. . 74
U nlocking and loc king vehicle . ... .. .. . 36
Conve rtib le child sa fe ty seats ..... .. .. 17S
Convertib le locking retractor
Activati ng .... ... .. ..... .......... 181
Deact ivati ng .. ... .. ..... .......... 181
U sing to secure a child safety seat l.79, 181
Coolant
refer to Eng ine coolant ......... .. .. 220
Cooling mode (automatic climate control) 70
Cruise cont ro l
Changi ng speed .. ................. . 80
P rese tt ing your speed .......... .. .. . 80
S wi tching off .. .. .. . .. ... .... ... .. . 80
Switching on . . . . . . . . . . . . . . . . . . . . . . . 79
Warning/indicator lights ..... ... .. .. . 22
( upholder .. .. .. .. .... ........... .. . 60
Curve light .. .. .. .. .. ............... . 96
Cylinder on demand System ... ... .. .. . 26
D
Data recorde r . . . . . . . . . . . . . . . . . . . . . . 189
Date d isp lay .. .. .. .. . .. .. ..... ... .. . 26
Daytime running lights . ... .... ... .. .. . 44
Decla rat io n of compliance
Adaptive c ruise cont ro l ......... .. .. 276
A udi s ide ass ist ...... ......... .. .. 276
C e ll phone package ... ...... ... .. .. 276
Co nvenience key .... . .. ..... ... .. .. 276
E lectronic immobi lizer .. ..... ... .. .. 276
Homelink universal remote control . .. 276
Remote contro l key ............ .. .. 276
Tire pressure mo nitor ing system . .. .. 276
Decorative pa rts/trim
Cleaning . ... .... .. . .. .. ..... ... .. 205
D EF
Wh at does this mea n when it appears in
t h e tr ip odomete r display? ...... .. .. . 26
Defec tive light bu lb warni ng ......... .. 21
•
•

288 Index
Electromechanica l parking brake .... .. 15
Electronic power contro l . . . . . . . . . . . . . 20
Electronic Stabilization Control (ESC) . . . 18
Generator ............... .. .. .... .. 16
Instrument cluster .......... .. .... .. 10
Malfunct ion Indicator Lamp (MIL) . . . . . 20
Safety belt .... ... .... ..... .. .. .. .. 16
Turn signa ls .................. ..... 22
Warn ing/Ind icator lights
A irbag system . . . . . . . . . . . . . . . 1S4, 155
PASS ENGER AIR BAG OFF ........... 155
Warranty coverages ..... ... .. .. .... . 273
Washer rese rvoir .......... .. .. .... . 227
Wear ind icator .. .......... .. .. .... . 237
Weights ... .. .. . .. ..... ... .. .. .... . 270
What happens if you wear your safety belt
too loose? . .. ................ ... ... 13 7
What happens to unbelted occupants? .. 134
What impairs dr iving safe ty? . .. .. .... . 124
What should I do after chang ing a
wheel? .. ... ................... ... . 235
What should I do after rep lacing wheels? 235
Wheel bol ts
Torq ue ... .. ... ... .... ... .. .. .... . 244
Wheels .... ................... ... . 228
Check ing tire pressure ......... .. ... 234
C lean ing . ... ............ .. .. .. .. . 204
Cold t ire i nflat io n pressu re . .. .. .. .. . 232
Gene ral notes ............ .. .. .... . 228
Glossary of tire and loading termino lo-
gy . ..... .. ... .. ..... ... .. .. .... . 229
New tires and wheels ............... 239
Tires and vehicle load lim its .. .. ..... 235
When mus t a safety belt be rep laced? . . 136
When must the airbag system be inspect -
ed? . ....... ................... ... . 154
When should I ad just the tire pressures? 235
When shou ld I check the tire pressures? . 235
Where are lower anchorages located? ... 183
Where can I find the tire pressures for my
car? .. .. .. .. .. .. .. .... ... .. .. .. .. . 234
Why safety belts? . . . . . . . . . . . . . . 133, 134
W indows
C leaning/remov ing ice ...... ... .. ... 205
defrost ing (automatic climate contro l) . 71 Windsh
ie ld
Cleaning . ..... .. .. ... ..... ... .. .. . 48
defrosting (automatic cli mate control) . 71
Windsh ie ld washer sys tem ............ 48
W asher fl u id level . . . . . . . . . . . . . . . . . . 21
Washer reservo ir ... ... ..... ... .. .. 227
Windsh ie ld wipers
Cleaning .. .. .. .. .. ........... .. .. . 49
Folding up .... .. ............. .... . 49
Indicator light . ... ............ .. .. . 21
Rep lacing windsh ield wiper b lades . ... . 49
Switching on/off ... .... .... ... .. .. . 48
Winter operation Battery . .. .. .. .. .. ... ........ .. .. 223
Car washes .... .. ............. .... 203
Cooling sys tem ... .. ... ..... ... .. .. 220
Defrosting windows (automatic climate
control) . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Removing ice from windows ..... .... 205
Seat heating (automat ic climate control) 71
Steering wheel heat ing .............. 72
Tires ............................ 195
Winter tires ..... .. .. ... ..... ... .. .. 243
All-wheel drive . ... .............. .. 243