2015 AUDI A5 cooling

Checking and F ill in g
@ For the sake of the environment
- Under no circumstances can the oil come in
contact with the sewage network or the soil.
- Observe and fo llow lega l regu lations when
disposing of empty oil containers .
Changing the engine oil
We recommend that hove your oil changed by on
authorized Audi dealer or a qualified service sta­
tion.
Before you check anything in the engine compa rt ­
ment,
alway s read and heed all WARNINGS ¢ .&.
in Working in the engine comportment on
page 191.
The engine oil must be changed according to the
i n terva ls specified in yo ur Warranty
& Mainte­
nance booklet . This is very important because the
lubricat ing propert ies of o il diminish gradua lly
during normal vehicle use.
Under some circ umstances the engine oi l sho uld
be changed more frequent ly . Change oil more of­
ten if you drive most ly short distances, operate
the vehicle in dusty areas or under predom inantly
stop-and-go traffic condit ions, or have your vehi­
cle where temperatures rema in below freezi ng
for extended periods.
Detergent addit ives in the o il w ill make fresh oil
look dark after the engine has been running for a
short time. This is normal and is not a reason to
cha nge the oil mo re often than recommended .
Because of the problem of proper disposa l, along
with the special tools and necessary expertise re­
qu ired, we stro ngly recommend that you have
your oil changed by an autho rized
Aud i deale r or
a qualif ied se rvice stat ion.
If you choose to change your o il yourself, please
note the fo llowing important information :
A WARNING
To reduce the ris k of persona l inju ry if yo u
must c han ge the engine oil in your ve hicle
yo urself:
- Wea r eye p rotection .
196
-
-To reduce t he risk of burns from hot engine
oil, let the engine coo l down to the touch.
- W hen removing the o il drain p lug with your
fingers, stay as far away as possib le. Always
keep your forearm parallel to the ground to
he lp prevent hot oi l from running down your
arm .
- Dra in the oil into a c ontainer designed for
this purpose, one la rge enough to hold at
least the tota l amount of oil in your engine.
- Engine oil is poisonous. Keep it we ll out of
the reach of chi ld ren .
- Continuous contact w it h used eng ine oi l is
ha rmf ul to your skin. Always protect you r
skin by washi ng oil off tho roughly wi th soap
a nd wate r.
(D Note
Never mix oil additives with your engine oil.
These additives can damage your e ngine and
adverse ly affect your Audi Limited New Vehi­
cle Warranty.
@ For the sake of the environment
- Before changi ng your oil, first make su re
you know where you ca n prope rly dispose of
the used oil.
- Always dispose of used eng ine oil properly.
Do not d ump it on garden so il, wooded
areas, in to op en st reams o r down sewage
drai ns.
- Recycle used engi ne oil by taking it to a used
eng ine oi l collect ion fac ility in yo ur area, o r
c ontact a service station.
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 genera lly re­
q u ires little attention.
The cooli ng sys tem has been filled at the f actory
wi th a permanent coolan t which does not need to
be changed. The coolant consists of a mixtu re of
jll,,

M N
i? co ,...., \!) 1.1"1
N 1.1"1 ,....,
specially conditio ned water an d the manu fa ctu r­
er's glycol-basedcoolant additive Gl3 antifreeze
with anticorrosion additives (50% for USA mod­
els; 60% for Canadian models). This m ixture both
assures the necessary frost protection and pro­
tects meta l components in the engine's cooling
system from corrosion and scal ing . It also raises
the boiling point of the coolant.
Do not reduce the concentration of the coolant in
the summer by adding plain water .
The p ropor­
tion of coolant addit ive must be at l east 50 %
but n ot mor e th an 60 %
to maintain antifreeze
protection and cooling efficiency. If the coolant
frost protection is too low, the coolant cou ld
freeze and damage the vehicle heating and en­
gine cooling system.
F or yea r-round driving, antifreeze is added at the
factory fo r temperatures dow n to:
- -31°F(-35°C)USA
- -40 °F ( - 40 °C) Canada.
If you must add coo lant, use a mixture of water
and coolant addit ive. Mixing the coolant additive
with distilled water is recommended.
A WARNING
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 191.
(D Note
- Before winter sets in, have the coolant
checked to see if the coolant addit ive in your
vehicle is suffic ient to meet the cli mate con­
dit ions. This is especially important if you
li ve in a region where the win ter is extreme­
l y co ld. If ne cessary, i ncrease the proport ion
of coo lant add itive to 60%.
- When adding coolant a ddit ive to you r cool ­
i ng system, remember:
- We recommend using only coolant addi­
tive Gl2++ or Gl3 for your ve hicle. This
coolant additive is ava ilable at authorized
Audi dea lers. Other types of ant ifreeze can
significant ly reduce co rrosion protection.
Checking and Fillin g
The resulting corrosion can ca use a loss o f
coolant and serious engine damage.
- Do not add any type of rad iator le ak sealan t
to your vehicle's engine coolant. Adding ra­
diator repai r fluid may adverse ly affect the
function and performance of your cooling
system and could result in damage not cov­
ered by your New Vehicle Lim ited Warranty.
Checking the engine coolant level
The engine coolant level can be checked with a
quick glance.
Fi g. 164 Engine compartment: Cover on the coolant ex­
pa nsion tank
.. Before you check anything in the engine com­
partment,
alwa ys re ad and heed all WARN­
INGS ¢ A in Working in the engine compart­
ment on page 191.
.. Park your vehicle on a level su rface.
.. Tu rn off the ignition .
.. Read the engine coolant level from the coolant
expansion tank
¢fig . 164, ¢page 193,
fig . 161 .
With a cold engine, the coolant leve l
should be between the "M IN" and "MAX" mark­
ings. When the eng ine is warm, the level may
be slightly above the "MAX" marking.
The location of the coo lant expansion tank can be
seen in the engine compartment illustration
¢page 193.
To obtain an a ccur ate reading, the engine m ust
be switched off.
T he expansion tank in yo ur veh icle is eq uipped
with an electric coo lant level senso r.
When the coolant leve l is too low, the wa rn ing
light in the Auto-Check System¢
page 17 will
197

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
198
¢ A in Working in the engine compartment on
page 191.
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 197, fig. 164 and car efull y turn
the cap counter-clockwise
~ .&_ .
.,,. Add coo lant mixed in the correct ratio
~ page 196, 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 196, 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
0 l­oo
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
i::;, page 196 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 sw itch 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. 1 65 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 191 .
.,. Read the brake fluid level from the b rake fluid
reservoir
¢ fig. 165, ¢page 193, fig . 161 . The
brake fluid level must be between the
"MIN "
and "MAX " markings.
19 9

Index
Child safety sea ts
Booster seats . . . . . . . . . . . . . . . . . . . . . . . 159
Convertible c hild seats . . . . . . . . . . . . . . . 157
Danger of using ch ild restra ints in the front
sea t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
H ow do I proper ly install a child safety seat
i n my ve hicle? ... ... .. ... ..... .. .. .. . 154
I nfant seats . . . . . . . . . . . . . . . . . . . . . . . . 156
L A T CH sys tem . . . . . . . . . . . . . . . . . . . . . . . 165
S afety ins tructions . . . . . . . . . . . . . . . . . . . 154
Unused safety belts on the rear seat . . . . 156
Ch ild seats . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Secur ing . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Cigarette lighter . . . . . . . . . . . . . . . . . . . . . . . 60
C le ani ng . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Climate contro l system . . . . . . . . . . . . . . . . . 68
Automatic recirculation . . . . . . . . . . . . . . . . 7 1
Supp lementary heater . . . . . . . . . . . . . . . . . 7 1
synch ron izing . . . . . . . . . . . . . . . . . . . . . . . . 7 1
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
C losing
Sun blind . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
C losing/openi ng
at the loc k cylinde r. . . . . . . . . . . . . . . . . . . . 36
by remote con tro l . . . . . . . . . . . . . . . . . . . . 34
with the cen tral locking switch . . . . . . . . . . 35
with the convenience key . . . . . . . . . . . . . . . 34
Com ing home . . . . . . . . . . . . . . . . . . . . . . . . . 45
Compact spare t ire . . . . . . . . . . . . . . . . . . . . 225
also refer to Spare tire . . . . . . . . . . . . . . . . 225
Compartments . . . . . . . . . . . . . . . . . . . . . . . . 61
Compass in the mir ro r . . . . . . . . . . . . . . . . . . 52
Comp liance . . . . . . . . . . . . . . . . . . . . . . . . . . 247
Consumer informa tion . . . . . . . . . . . . . . . . . 2 44
Consumer I nformat ion . . . . . . . . . . . . . . . . . 119
Contacting N HTSA
119
Conven ience key
I ndic ator l igh ts . . . . . . . . . . . . . . . . . . . . . . 76
S tarting engine (STAR T ENGINE S TO P bu t-
ton) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Stopping the engine (S TAR T ENGINE STOP
button) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Sw itching on ignition . . . . . . . . . . . . . . . . . . 75
u nl ocking/locking . . . . . . . . . . . . . . . . . . . . 34
Conven ience opening/ closing . . . . . . . . . . . . 39
Convert ible ch ild safety s eats . . . . . . . . . . . 157
250
Convertib le locking retractor
Activating . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Deact ivat ing . . . . . . . . . . . . . . . . . . . . . . . . 163
U sing t o secure a child safety seat . . . . . . 162
C oolant system . . . . . . . . . . . . . . . . . . . . . . . 196
Cooling mode (automat ic climate control) . . 69
Cooling System Expansion tank... .. ............... .. 197
Corner ing l igh t . . . . . . . . . . . . . . . . . . . . . . . . 44
Cruise contro l
Changi ng speed . . . . . . . . . . . . . . . . . . . . . . 81
P resett ing your speed . . . . . . . . . . . . . . . . . 81
Swit ching off . . . . . . . . . . . . . . . . . . . . . . . . 81
Swi tchin g on . . . . . . . . . . . . . . . . . . . . . . . . . 80
C ruisi ng range . . . . . . . . . . . . . . . . . . . . . . . . . 24
( up holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
D
Data recor der . . . . . . . . . . . . . . . . . . . . . . . . 169
Date disp lay . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Daytime runn ing lig hts. . . . . . . . . . . . . . . 44 , 45
De clarat io n of compliance
Adap tive cruise control . . . . . . . . . . . . . . . 2 47
Audi s ide ass ist . . . . . . . . . . . . . . . . . . . . . 24 7
Ce ll phone package . . . . . . . . . . . . . . . . . . 247
Convenience key . . . . . . . . . . . . . . . . . . . . . 247
E lectronic immob ilizer. . . . . . . . . . . . . . . . 247
Homelink universal remote control . . . . . 247
Remote contro l key . . . . . . . . . . . . . . . . . . 247
Defect ive light bu lb wa rning . . . . . . . . . . . . . 21
Defrost ing (windows) . . . . . . . . . . . . . . . . . . . 70
Dete rm ining correct load limit .... .... .. 219
D igi tal cloc k . . . . . . . . . . . . . . . . . . . . . . . . . . 12
D igital compass . . . . . . . . . . . . . . . . . . . . . . . 52
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 242
D imm ing t he rearv iew m irror . . . . . . . . . . . . 48
Doors emergency lock ing . . . . . . . . . . . . . . . . . . . . 36
D river informat ion system . . . . . . . . . . . . . . . 23
En hanced shift indicator . . . . . . . . . . . . . . . 2 7
Open door or front lid warning . . . . . . . . . . 23
Outs ide tempe ratu re disp lay . . . . . . . . . . . . 23
Sound system display . . . . . . . . . . . . . . . . . 23
D river seat
refer to Seating position . . . . . . . . . . . . . . 113
D rivi ng econom ica lly . . . . . . . . . . . . . . . . . . 179