2013 AUDI A5 COUPE radiator

210 Cleaning and protec tio n
Cor ro sion pr ote cti on
The engine compa rtment and transmiss ion
hav e been corrosion-protect ed at th e factory.
Good ant i-corrosion t reatme nt is very impor­
tant, particularly in the winter. If the veh icle
is frequently driven on sa lt treated roads , the
enti re engin e compartment and pl enum panel
should be thoroughly cleaned at the end of
wint er and retreated to pr eve nt salt damag e.
At the same t ime, the underside of the vehicle
should be washed as well.
If the engine compartment is cleaned at any
t ime with gr eas e re moving solutions
1>, or if
you have the engine washed, the anti -corro­
sion treatmen t is almost always removed as
well. It is therefore essential to have a long­
lasting corrosion protection reapplied to all
surfaces, seams, joints and components in the
engine compartment .
_& WARNING
Be aware: The engine compartment of any
motor vehicle is a potentially ha zardous
area .
- Before working in the engine compart­
ment, be s ure to read the in formation
Q page 216.
-Before reaching into the front plenum
pane l, always remove the ignition key .
Otherw ise, the windshield wiper system
cou ld unintentionally be switched on,
poss ibly causing personal injury from the
moving wiper linkage.
- Never reach into the area around or
touch the radiator fan. The auxiliary fan is temperature controlled and can switch
on suddenly -even when the ignit ion is
off .
- Do not wash, wax or dry the engine w ith
the engine running . Moving or hot pa rts
cou ld injure you .
- Do not clean the underside of the chas­ sis, fenders , wheel covers, or other hard
1l Use only th e correct clean in g so lu ti on s. Ne ver use ga s­
o lin e or diesel fue l.
to reach parts without protecting your
hands and arms . You may cut yourself on
sharp-edged metal parts.
- Always read and heed all WARNINGS and
other information
Q page 200.

-Apply the parking brake.
- Move selector lever of automatic trans-
mission to "P" (Park); put manual trans­
mission in Neutral.
- Always let the engine cool down . Hot
components will burn skin on contact.
- To reduce the risk of being burned, never
open the hood if you see or hear steam
or coolant escaping from the engine
compartment . Wait until no steam or
coolant can be seen or heard before care­
fully opening the hood .
- Keep children away from the engine com­
partment .
- Never spill fluids on hot engine compo­
nents. They can cause a fire.
- Never touch the radiator fan. The auxili­
ary electric fan is temperature controlled
and can switch on suddenly.
- Never open the coolant reservoir cap
when the engine is still warm. The cool­
ant system is pressurized and hot cool­ ant could spray out .
-Protect your face, hands and arm from
steam or hot engine coolant by placing a
thick rag over the cap when you open the
coolant reservoir .
- Do not remove the engine cover under
any circumstances. This increases the
risk of burns.
- If work on the fuel system or the electri­
cal system is necessary:
- Always disconnect the battery.
- Never smoke or work near heaters or
open flames. Fluids in the engine com­
partment could start a fire.
- Keep an approved fire extinguisher im­
mediately available.
- To avoid electrical shock and personal in­
jury while the engine is running or being
started, never touch:
- Ignition cables
- Other components of the high voltage
electronic ignition system.
-If you must perform a check or repair
with the engine running:
Checking and filling 217
- First, fully apply the parking brake,
move selector lever of automatic trans­
mission to "P" (Park); put manual
transmission in Neutral.
- Always use extreme caution to prevent
clothing, jewelry, or long hair from get­
ting caught in the radiator fan, V -belts
or other moving parts, or from contact­ ing hot parts. Tie back hair before
starting, and do not wear clothing that
will hang or droop into the engine.
- Minimize exposure to emission and
chemical hazards~,& .
.8, WARNING
California Proposition 65 Warning:
- Engine exhaust, some of its constituents,
and certain vehicle components contain
or emit chemicals known to the State of
California to cause cancer and birth de­
fects and reproductive harm. In addition,
certain fluids contained in vehicles and
certain products of component wear con­
tain or emit chemicals known to the
State of California to cause cancer and
birth defects or other reproductive harm.
- Battery posts, terminals and related ac­
cessories contain lead and lead com­
pounds, chemicals known to the State of
California to cause cancer and reproduc­
tive harms. Wash hands after handling.
(D Note
When adding fluids, always make sure that
they are poured into the proper container
or filler opening, otherwise serious dam­
age to vehicle systems w ill occur.
@ For the sake of the environment
To detect leaks in time, inspect the vehicle
floor pan from underneath regularly. If
you see spots from oil or other veh icle flu­
i ds, have your vehicle inspected by an au­
thorized Audi dealer . •
•

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 water and the manufacturer's gly ­
col-based coolant additive G13 antifreeze with
anticorrosion additives (50% for USA models;
60% for Canadian models). This mixture both
assures the necessary frost protection and
protects metal components in the engine's
cooling system from corrosion and scaling. It
also raises the boiling 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.
A WARNING
Before you check anything in the engine
compartment, always read and heed all
WARNINGS
¢ .&. in Working in the engine
compartment on page 216.
(D Note
- Before winter sets in, have the coolant
checked to see if the coolant additive in
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-
Checking and filling 223
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. 172 Engine compar tment: Cover on the coola nt
expansio n tank
-... ;;; ,; a, m
.. Before you check anything in the engine
compartment,
always read and heed all
WARNINGS ¢ & in Working in the engine
compartment on page 216.
"' Park your vehicle on a level surface .
"' Turn off the ignition .
"' Read the engine coolant level from the
coolant expansion tank¢
fig. 172 ,
¢ page 218, fig. 169 .
With a cold engine,
the coolant level should be between the
"MIN" and "MAX" markings . When the en­
gine is warm, the level may be slightly above
the "MAX" marking.
Iii>

224 Check ing and filling
The location of the coolant expansion tank
can be seen in the engine compartment illus­
tration
¢ page 218.
To obtain an accurate read ing, the eng ine
must be switched off .
The expans io n tank in you r vehicle is equipped
with an e lectr ic cool ant level sensor.
When the coolant level is too low, the warning light in the A uto-Check System
¢ page 18 w ill
b link until you add coo lant and the level has
been restored to no rm al. Even though the re is
an e lec tric coolant level sensor, we s till rec ­
ommend you check the coolant leve l from
time to time.
Coolant loss
Coolant loss may indicate a leak in the cooling
system. In the event of coolan t loss, the cool ­
i ng system should be inspected immedia tely
by your authorized A udi dealer. It is not
enough merely to add coolant.
I n a
s e aled system, losses can occur only if
the boiling poin t of the coolant is excee ded as
a result of overheating.
A WARNING
The cooling system is unde r pressure and
can get ve ry hot. Reduce the risk of sca ld­
ing from hot coolant by following these
steps.
- Turn off the engine and allow it to cool
down.
- 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 ve ry carefu lly in
a counter-clockwise direction wh ile ap­
plying light, downward pressure on the
top of the cap .
- To avoid being b urned, do not spill ant i­
freeze or coolant on t he exhaust system
or hot eng ine parts. Unde r certain condi­
tions, t he ethy lene g lycol in engine cool­
an t can ca tch fire .
(D Note
Do not ad d any type of radiator leak sea l­
ant to your veh icle's engine coo lant. Add­
i ng radiator repa ir fluid may adverse ly af­
fect the funct ion and performance of your
cooling system and could result in damage not cove red by your New Veh icle L imited
War ran ty .
Adding coolant
Be very careful when adding engine coolant.
Before you check anyth ing in the eng ine com­
partmen t,
always read and heed all WARN­
INGS ¢ &. in Working in the engine compart ­
ment on page 216.
.. Turn off the engine.
.. Let the engine cool down.
.. Place a thick rag over the coolant expansion
tank ¢
page 223, fig. 172 and carefully turn
the cap counter-clockwise ¢
,&..
.,. Add coo lant.
.. Twist the cap on aga in
t ightly.
Replacement engine coo lant must confo rm to
exact spec ificat ions ¢
page 223, Coolant. We
recommend using on ly coo la nt add itive G 12+
+ , G 13 or in an eme rgency G12+. Do
not use a
different additive. In an emergency use plain
water until yo u can get the correct additive
and can restore the correct ratio . This sho uld
be done as soon as possible .
If you have los t a considerab le amount o f
coolant , then you sho uld add cold antifreeze
and cold wate r on ly w hen the engine is cold.
Always use
new engine coo lan t when refilling.
Do not f ill coo lant abov e the
"MAX" ma rk . Ex­
cess coo la nt w ill be fo rced o ut through the
pressure relief 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 ..,.

scalding from hot coo lant by following
these steps.
- Turn
off the engi ne and a llow it to cool
down.
- Protect your face, hands and arms from
escapi ng fl uid and steam by cover ing
the cap with a large, thick rag .
- Turn the cap slowly and very ca refully
i n a cou nte r-clockw ise dir ect ion while
a pply ing lig ht, downwa rd p ress ure on
the top of the cap.
- T o avo id being burned, do no t sp ill an­
tifree ze o r coolan t on t he exh aust sys­
tem or ho t engine parts . Un der certain
conditions, the ethylene glyco l in en­
gine coolant can catch fire .
- Antifree ze is poisono us. Always store an­
tifreeze in its or iginal co ntainer and we ll
o ut o f the reac h of children.
- If you drain the coolant , it must be
caught and safely stored in a p roper con ­
tainer clear ly marked "poison".
(D Note
- Coolant po llutes the env ironment and
could ca use a n engine fire . Excess coo l­
ant wi ll be forced out through the pres ­
sure re lief va lve 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 223 must be re­
stored as soon as possib le .
@ For the sake of the environment
Drained coolant should not be re used . Al­
ways dispose of used c oolant while observ­
ing all envir onmental regulations .
Radiator fan
The radiator fan switches on automa tically by
itself
T he radiator fan is driven by the engine via the
V-be lt. The viscous clutch regulates the speed
of the fan according to the temperature of the
coolant .
Checkin g and fillin g 225
An auxiliary electric radiato r fan* sw itches on
and
off depending on coolant temperature
and othe r vehicle ope rat ing con ditions.
After yo u switc h the engi ne off, the aux iliary
f an can con tinue r unning for up to 10 minutes
- 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 b uild -up from the en gine in
the engi ne compartment, or
- the engine compartment heats up be cause
the vehicle is parked in intense sunlight.
A WARNING
- To reduce the risk of personal in jury nev­
er touch the radiator fan.
- The a uxiliary electric fan is temperat ure
contro lled and can switch on sud denly
even when the engine is not running.
- The a uxiliary radiator fa n 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 .
Brake fluid
Checking brake fluid level
The brake fluid level can be checked with a
qui ck glance.
Fig. 17 3 En gin e compar tment: Cover o n the brak e flu­
i d reservoi r
Before you check anyth ing in the eng ine com­
partment ,
always re ad and heed all WARN­
INGS c::> ,& in Working in the engine compar t-
ment on page 216 . .,..

28 2 Index
Eng ine
Compartment .. . ...... ... .. .. .... . 218
Coolant .. .. ... ... .... ... .. .. .... . 223
Hood .. .. ............... .. .. .... . 216
Starting . . . . . . . . . . . . . . . . . . . . . . 71, 74
Starting with jumper cables .. .. .. ... 263
Stopping . . . . . . . . . . . . . . . . . . . . . . 73, 75
Engine compartment Safety instructions . . . . . . . . . . . . . . . . . 216
Working the engine compartment 216
Eng ine coolant
Indicator light . .. ..... ... .. .. .... .. 18
E ng ine coolant system ............... 223
Adding coo lant ......... .. .. .. .. .. . 224
Chec king coolant leve l ..... .. .. .... . 223
Check ing the eng ine coolant leve l .. .. . 223
Radiator fan . .. .. ..... ... .. .. .... . 225
E ng ine coolant temperature
Tempe ratu re ga uge ................. 10
Eng ine data .... ........... ........ . 271
E ngine hood
C losing . . . . . . . . . . . . . . . . . . . . . . . . . . 216
How to release the hood ... .. .. .. .. . 216 Proper disposal of d
rained eng ine cool -
ant . ... .. .... .. .. ... ..... ... .. .. 224
Proper d isposal of drained eng ine
o il ... .... .... .. ............ 221,222
Recycling used engine oil ........ .... 221
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . 62
Unleaded fuel .. .. ... .. ....... ... .. 211
What shou ld I do with an o ld battery? . 230
EPC
refer to Electronic power control . . . . . . 20
E SC (Electronic Stab ilizat ion Con trol)
Warning/indicator lights ..... ... .. .. . 19
E thy l alcoho l (Fuel) . ... .......... .. .. 212
Event Data Recorder (EDR) ........ .... 185
E xhaus t tail pipes
Cleaning . ..... .. ... .. ..... .... . .. 205
E xpansion tank .. .. ................ . 223
Exterior lighting . .. ... .......... .. .. . 43
E xterior mirrors
Adjusting ..... .. .. ... ..... ... .. .. . 46
Dimm ing . ..... .. .. ... ..... ... .. .. . 47
Heating ... .... .. .. ... ..... ... .. .. . 46
E ng ine oil ... ... .......... .. .. .. .. . 218
F
Adding .. .. ............. ........ . 22 1
Addit ives ... ... .. ..... ... .. .. .... . 22 1
C hanging . .... .. ..... ... .. .. .... . 222
Check oil leve l ........... .... .... . 221
Consumpt ion ............ .. .. .. .. . 221
Indicator ligh t ............. .. .. 17,21
O il consumption ............... .... 220
O il grades .. .......... ........ ... . 218
O il level symbol .............. .. .... 21
Pr essu re malfunct ion ................ 17
Sensor defective . . . . . . . . . . . . . . . . . . . . 2 1
Specif ication and viscos ity . ... .... .. . 2 18
E ng ine speed limitat ion .......... ..... 21
Environment Break- in period ............... .... . 193
Cata lytic converter ............ .... . 194
Disposing of your vehicle battery .. .. . 230
Driving a t high speeds ......... .. ... 195
D riving to m inim ize pollution and no ise 195
F uel . .. ................. .. .. ..... 2 13
Fu el economy .......... .. .. .. .. .. . 195
L eaks under your veh icle ... .. .. .. .. . 216
L etting the vehicle stand and wa rm up . 195
Proper disposal of drained brake fluid . 226 F
an
Radiator
Fastening 225
Boos ter sea ts . . . . . . . . . . . . . . . . . . . . . 17 4
Co nvertib le child sa fe ty seats . . . . . . . . 173
Infan t seats
Flat tire 172
Chang ing . .. .. .. ............. .. .. 253
flexib le fuel . .... .. ... .......... .... 212
Floor mats . ..... .. .. .... .... ... .. .. 129
Fog lights/rear fog light(s) ...... ....... 43
Fo lding the rear seats .... ..... ... .. .. . 63
Foot peda ls . ....................... 129
For the sake of the environment
Gasoli ne fumes and the env ironme nt .. 213
L etting the engine warm up . . . . . . 71, 74
Ref ueling . .. .. .. ............. .. .. 213
Sav ing f uel by early u pshi fting . .. .... . 11
Front a irbags
Description . . . . . . . . . . . . . . . . . . . . . . . 146
How they work ........ ........... . 151
Frontal coll is ions and the laws of phys ics 135

28 6 Index .:..:..:..::....::.. ...:..._ ___________________________ _
Parking system ........... ... .. .... .
C leaning se nsors/camera . ... ... ... .
Rear 112
202
112
Rea r, with rear view camera ... .. .... . 113
Park ing system (rear) ................ 112
Adjusting the warning tones .. .... .. . 113
Park ing system (rear, w ith rear view cam-
e ra)
Q
Quartz clock . . . . . . . . . . . . . . . . . . . . . . . . 12
quatt ro ®
refer to all-wheel drive ........... .. 190
Question Wha t happens to unbelted occupants? 135
Why safety belts? ................. 134
Parking mode 1 .......... .. .. .... . 116
Park ingmode2 ........ .. .. .. .. .. . 117
R
Safety precautions ......... ... .... . 114
Switching on/off .......... ... .... . 115
Switching rear view camera on/off ... . 118
Parts rep lacement .................. 275
Pass-through . . . . . . . . . . . . . . . . . . . . . . . . 65
PASSENGER AIR BAG OFF light ....... . 153
Passive safety system ........ ... .. ... 124
Pedals .. .. ... ............ .. .. .. .. . 129
Phys ica l pr inc iples of a frontal coll is ion . 135
Polishing .. .. ................ ... ... 202
Pollutant filter (automatic AC system) ... 67
Powe r
seat adjustment . . . . . . . . . . . . . . . . . . . . 54
Power locking system . . . . . . . . . . . . . . . . . 32
Emergency locking ......... .... ..... 37
Panoramic tilting sunroof ...... .. .... 40
Powe r windows .......... .. .. .. .. .. 40
Rear lid .. .. ... .......... .. .. .. .. .. 39
Selec tive unlock feature ... .. .. .. .. .. 37
Se ttings ... ................ ..... .. 37
Power steering
refer to Electro-mechan ical power as-
sist . .. .. .. ............. .. .. .. .. . 189
Power window Conven ience opening/closing ... .. .... 40
Power windows .. . ...... ... .. .. .... .. 40
Malfunctions .............. .. .... .. 41
Pregnant women Specia l considerations when wearing a
safety belt . . . . . . . . . . . . . . . . . . . . . . . 139
Proper occupant seating posit ions .. ... 125
Proper safety belt pos it ion ..... .. .... . 138
Prope r seat ing pos it ion
F ront passenger . . . . . . . . . . . . . . . . . . . 126
Occupants . .... .. ..... ... .. .. .... . 125
Rear passengers ....... ... .. .. .... . 127 Radiator fan
225
Rain/light sensor Headlights .... .. .. ... ......... ... . 43
Intermittent (windshield wipers) ... .. . 49
Sensor defective . . . . . . . . . . . . . . . . . . . . 22
Reading lights . .. .. .. ........... .. .. . 46
Rear fog lights .. .. .. ... ....... ... .. . 43
Rear lid Escape handle ... ... .. ..... ... .. .. . 39
Open ing and closing ........... .... . 39
Rear l ight
De fective . . . . . . . . . . . . . . . . . . . . . . . . . 21
Rear view camera Parking mode 1
Pa rking mode 2 116
11
7
Rear view mirror . .. ............. .. .. . 47
Rea r window heating .. .. ..... .... . .. . 69
Rea r window su n shade ......... ... .. . 48
Recirc ulation mode (automatic climate
control) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Ref uelling .. .... .. .. .... .... ... .. .. 213
Release lever for hood ............... 216
Remote contro l
Homelink ..... ... ................ 119
Remote contro l key . ... .......... .. .. . 33
Personalizing .... .. .... .... ... .. .. . 33
unlocking/locking . .. .. ..... .... . .. . 35
Remote rea r lid re lease .......... .. .. . 39
Repair manuals .. .. ... .......... .... 273
Repairs Airbag system ... ... .. ..... ... .. .. 155
Replacement key . . . . . . . . . . . . . . . . . . . . 33
Replacing Windsh ield wiper blades ............ . 50
Replacing b ulbs ... ... .. ..... ... .. .. 262
Replacing tires and wheels ............ 243