2010 AUDI A5 COUPE Owners Manual

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& WARNING
The cooling sy stem i s under pre ssure and can get very hot . Redu ce
the risk of scalding 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
ste am by cover ing the cap with a large , thick rag .
• Turn the cap slowly and very carefully
in a counter -clockwise
dire ction while applying light , downward pressure on the top of
the cap .
• To avoid being burned, do not spill antifreeze or coolant on the
e x haust system or hot engine parts . Under certain conditions, the
ethylene glycol in engine coolant can catch fire .
0 Note
Do not add any type of radiator leak sea lant to your vehicle's engine
coolant. Adding radia to r repa ir flu id may advers ely affect the fu nc­
tion and performance of your coo ling system and could res ult in
damage not covered by y our New Vehic le Lim ited War ra nty .•
Adding coolant
B e very care ful when ad ding e ngine cool ant.
Be for e you check a nything in the engine com partmen t,
always read and heed all WARNINGS~ & in "Work ing in
t h e eng ine compa rtment" on
page 271 .
-Tur n o ff th e en gine.
- Let the e ng in e cool d own.
- Plac e a thi ck rag over the coo la nt expansion tank
~ page 2 78 , fig. 2 25 and carefully tur n t he cap coun te r­
cl ockwi se
~ &.
Add coo lan t.
- Twist the cap on aga in
tightly.
Replacement engine coolant must conform to exact specifications
~ page 2 77, "C oolant". Even in an eme rgency, if co olant addi tive
G12+ +, G12 + or G12 is not availab le, do not use a different additive.
U se pla in water ins tead until you can ge t the c orrect add itive and
can res tore the correc t rat io. Th is shou ld be done as soon as
p os sible.
I f y ou hav e los t a co ns ide rab le amou nt of coo la nt, then y ou should
add cold antifreeze and cold water only when the engine is cold .
A lways use
new e ngine c oolant w he n r efil ling .
D o not fill coolant a bove the " MAX" mark. Excess coola nt w il l be
forced out through the pressure relief va lve in the cap when the
eng ine becomes hot.
& 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 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 applying light, downward pressure on the top
of the cap.
- To avoid being burned, do not spill antifreeze or coolant on
the exhau st system or hot engine parts. Under certain condi ­
tions, the ethylene glycol in eng ine coolant can catch fire .
• Antifreeze is poisonous. Always store antifreeze in its original
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 container clearly marked "poison ".
~
Vehicle care I t •

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0 Not e
• Coolant pollutes the environment and cou ld cause an engine
fire. Excess coolant will be forced out through the pressure relief
valve in the cap when the engine becomes hot.
• If, in an emergency, only water can be added, the correct ratio
between water and antifreeze ~
page 277 must be restored as soon
as possible .
ci> For the sake of the environment
Dra ined coolant should not be reused . Always dispose of used
coolant whi le observing all environmental regulations. •
Radiator fan
The radiator fan switches on automatically by itself.
The rad iator fan is driven by the eng ine v ia the V-be lt . The v iscous
clutch regulates the speed of the fan according to the tempera ture
of the coo lant .
An auxiliary electric radiator fan * swi tches 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 minut es -even with th e igni tion o ff. It can even
switch o n again later by itself~ & , if
• the temperature of the engine coo lant rises due to the heat
bui ld -up from the engine in the engine compartment, o r
• the engine compartment heats up because the vehic le is parked
in intense sun light.
& WARNING
• To reduce the ri sk of per sonal injury never tou ch the radiator
f a n.
& W AR N ING (continu ed )
• The auxiliary e le ctri c fan i s temperature controlled and can
s w itch on suddenly even when the engine is not running .
• The auxiliary radiator fan swit ches on automatically when the
engine coolant reache s a ce rtain temperature and will con tinue to
run until the coolant t emperatur e drop s. •
Brake fluid
Checking brake fluid level
Th e brake fluid level c an be checked with a quick glance.
Fig . 22 6 En gin e
co mp art m ent : B ra ke
fl uid re servoir
Befo re yo u c heck anything in th e en gin e compar tme nt,
always read and heed all WARNINGS~ & in "Working in
the eng ine compartment" on
page 271 .
Read the brake fl uid level from the bra ke fluid reservoir
~ fig . 226. T he b rake fluid leve l must be betwee n the
" M IN " and "MAX" markings.
The brake fluid reservoir is located at the rear partition of the engine
compartment on the left side~
page 272 . .,_

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The fluid level may drop slightly after some time due to the auto­
m atic adjustment of the brake pads. This is not cause for alarm .
If the brake fluid level fal ls
considerably below the "MIN" mark , the
brake warning/indicator light (U.S. models :
BRAKE, Canadian models:
{(j))) will come on=> page 16 and => page 29. Do not continue to
operate the vehic le. The complete brake system should be thor ­
oughly checked by an author ized Audi dealer or qualified workshop
and the cause corrected . If the brake fluid level is too low, the brak e
warning/ind ica tor light will illuminate. Contact an authorized Audi
dea ler
immediatel y.
[ i J Tip s
The brake fluid reservoir is located underneath the cover. •
Changing brake fluid
Have the brake fluid changed by an experienced techni ­
cian.
Brake fluid absorbs moisture from the air . If th e water content in the
brake fluid is too h igh, corrosion in the brake system may result
after a period of time. The boi ling point of the brake fluid will also
decrease considerably and decrease braking performance .
Therefore , the brake fluid must be changed
ev ery tw o ye ars. Always
use new brake fluid which conforms to Federa l Motor Veh ic le Stan ­
dard "FMVSS 116 DOT 4".
T he brake fluid res ervoir can b e difficul t to reach, therefore, we
recommend that you have the brake fluid changed by your autho ­
rized
Audi de ale r. Your dealer has the correct tools, the right brake
fluid and the know -how to do this fo r you .
& WARNING
• Brake f luid i s poi sonou s. It mu st b e stored on ly in the clo sed
o riginal cont aine r out of the r eac h of childr en!
& WARN ING (c ontinued )
• Brake f ailur e can re sult fr om old or inappropriate bra ke fluid .
Ob se rve these p recauti ons:
- Use on ly brake fl uid that meet s SAE specification
J 17 03 and
c on fo rm s to Feder al Mot or Vehicle Sta ndard 11 6. Always c heck
with your authorized Audi de ale r to m ake sur e you are u sing
th e c orre ct b rake flu id . T he cor re ct t ype of br ake fluid is als o
indi cated on the brake fluid r eservoir.
- The br ake f luid mu st be ne w. H eavy u se of the b rake s can
c au se a vapor lock if the brake fluid i s left in the system to o
long. Thi s c an seriou sly affe ct the effi ciency of the brake s as
well as your safety . This could re sult in an a ccid ent .
0 Note
Brake fluid will damage the paint of your vehicle .
ffi For the sake of the environment
Because of the problem of proper disposal of brake fluid as well as
the special too ls required and the necessary expertise, we recom­
mend that you have the brake fluid changed by your authorized Audi
dea ler .•
Battery
General information
Under normal operat ing conditions, the battery in your Audi does
not need any maintenance. With
high outside temperatures or long
daily drives we recommend that you have the electrolyte level
checked by an authorized Audi dealer or qualified workshop. The
e lectrolyte level should a lso be checked each time the battery is
charged
=> page 284 . ~
Vehicle care I t •

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Have the battery checked when you take your vehicle in for service.
You are well advised to replace a battery that is older than 5 years.
With certain types of airbag deployment, the battery is discon­ nected from the vehicle electrical system for safety reasons=>
& in
"Repair, care and disposal of the airbags" on
page 202.
Disconnecting the battery terminals
Some vehicle functions (power window regulators, for example) are
lost if the battery terminals are disconnected. These functions have
to be relearned after the battery terminals are connected again . To
prevent this, the battery should only be disconnected from the
vehic le electr ical system when absolute ly necessary for repairs .
Vehicles not driven for long periods
If you do not drive your vehicle over a period of several days or
weeks, electrical components are gradually cut back or switched off.
This reduces energy consumption and maintains starting capability
over a longer period=>
page 241.
Take into consideration that when you unlock your vehicle, some
convenience functions, such as the master key remote function or power seat adjustment, may not be available. The convenience
functions will be available again when you turn on the ignition and start the engine .
Winter operation
During the winter months, battery capacity tends to decrease as
temperatures drop . This is because more power is also consumed
while starting, and the headlights, rear window defogger, etc., are
used more often.
Avoid unnecessary power consumption, particularly in city traffic or
when traveling only short distances . Let your authorized Audi dea ler
check the capacity of the vehicle battery before winter sets in
=>
page 284 . A well charged battery will not only prevent starting
problems when the weather is cold, but will also last longer.
[ i ] Tips
If your vehicle is left standing for several weeks at extremely low
temperatures, the vehicle battery should be removed and stored
where it will not freeze. This will prevent it from being damaged and
having to be replaced. •
Working on the battery
Be especially careful when working on or near the battery.
The battery is located in the luggage compartment under
the floor. Before you check anything in the luggage
compartment,
read and heed all WARNINGS =:>& .
Always heed the safety warnings, when working on the vehicle
battery or the vehicle electrical system to prevent injury.
The following WARNINGS are very important when
working on the battery:
Always heed the following WARNING SYMBOLS and safety pre­
cautions when working on the battery.
Always wear eye protection .
Battery acid contains sulfuric acid. Always wear
gloves and eye protection.

Checking and filling 111111
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•
®
No
-sparks
- flames
- smoking .
When a battery is charged, it produces hydrogen
gas which is explosive and could cause personal
injury .
Always keep the battery well out of reach of chil­
dren .
_& WARNING
Whenever working on the battery or on the electrical system ,
there is the risk of injury , accident and even fire . Read and heed the
following WARNINGS:
• Always wear eye protection . Do not let battery acid or any lead
particles get on your skin or clothing. Shield your eyes. Explosive
gases can cause blindness or other injury.
• Battery acid contains sulfuric acid . Sulfuric acid can cause
blindness and severe burns .
- Always wear gloves and eye protection . Do not tilt the
battery because acid could leak out of the ventilation openings .
- If you get battery acid in your eyes or on your skin, immedi ­
ately rinse with cold water for several minutes and get medical
attention.
- If you should ingest any battery acid , seek medical attention
immediately.
• Do not expose the battery to an open flame, electric sparks or
an open light.
• Do not smoke .
• Do not interchange the positive and negative cables .
• When working on the battery , be sure not to short -circuit the
terminals with tools or other metal objects . This would cause the
& WARNING (continued)
battery to heat up very quickly, which could lead to damage or
explosion and personal injury.
• When a battery is charged , it produces hydrogen gas which is
explosive and could cause personal injury .
• Always keep the battery well out of the reach of children. • Before work is done on the electrical system, disconnect the
negative ground cable .
• Before performing any work on the electrical system , switch off
the engine and ignition as well as any electrical equipment. The negative cable on the battery must be disconnected. If you are just
going to replace a light bulb, then it is enough to switch off the
lights.
• Before disconnecting the battery , switch off the anti -theft
alarm system! Otherwise you will set off the alarm .
• When disconnecting the battery , first disconnect the negative
cable and then the positive cable .
• Before reconnecting the battery, make sure all electrical
consumers are switched off . Reconnect the positive cable first and
then the negative cable . Never interchange the cables -this could
start a fire !
• Never charge a frozen or a thawed -out battery. It could
explode! If a battery has frozen, then it must be replaced . A
discharged battery can freeze over at 32 °F (0 °CI.
• Make sure the vent hose is always attached to the opening on
the side of the battery.
• Never use batteries which are damaged . There is the danger of
an explosion! Always replace a damaged battery .
_& WARNING
California Proposition 65 Warning:
Vehicle care
I t •

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& WARNING (c ont in ued)
• Batte ry po sts, te rmi nals a nd re late d accessor ies c ontain l ead
and l ead co mp ound s, chem ica ls know n to the S ta te o f Ca liforni a
to cause c ancer and repr odu ctive prob lems. Wa sh hands after
h andling.
0 Note
• Do not disconnect the vehicle battery when the ignition is
sw itched on or when the engine is running , otherwise, you wi ll
damage e lectron ic components in the e lectrical system .
• If your vehic le is going to s tand for a long period of time withou t
being driven, protect the battery from "freez ing", otherwise it will
be damaged and will then have to be replaced . •
Battery charging
Starting the engine requires a well charged battery.
Fig . 227 E ngin e
co mp artm ent : Co nnec­
tors for charger and
jump er cab les
Alw ay s re ad and h eed all WARNINGS below => & and=> &
in "Worki ng o n the batte ry" on
page 282 .
-Turn off the ign it io n and all electrical consumers . -
Make s ure the area is well ven tilated when y ou charge
the battery .
- Open the eng ine hood =>
page 270.
- Open the red cover on the pos itive pole => fig . 227.
- Connect the charger connectors accord ing to the ins truc-
t ions to the
jump start bolt s. (Bolts under the red cover=
"positive", Bolts with hex head= "negative").
- Only now pl ug the mains lead for t he charging equi p­
me nt in to the wa ll ou tlet and turn i t on =>& .
-Make sure the ch arging rate is not over 30 amp s/14.8
Volt .
-When the battery is fully charged: Turn the charging
equipment off and remove the mains lead from the wall
outlet .
- Now remove the clamps for the charging equipment .
- Close the red cover on the positive pole.
- Close the hood
=> page 271 .
A d ischarged battery can freeze at temperatures of only 32 °F (0 °C).
Allow a fro zen bat tery to thaw completely befor e attempting to
cha rge it=> & . However , we recommend not using a thawed battery
again because the ba ttery c asing can be cra cked due to ice forma ­
tion and can leak battery acid .
Batt ery c harg ing ( Max imum cha rg ing r ate of 3 0
amp s/14.8 Volt )
When charging at
/ow voltages (e .g . with a trickle c harger ), the
battery cables do not have to be disconnected first . The battery caps
should
not be opened when cha rging a battery .
I t is not necessary to remove the battery from the luggage compart -
ment. _..

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Fast charging the battery {charging rate above 14 .8
Volts )
For technical reasons do not use a battery charger that uses vo ltage
greater than 1 4.8 Vo lts to charge y our ve hic le 's battery.
& WARNING
Charging a battery can be dangerous .
• Always follow the operating instruct ions provided by the
battery charger manufacturer when charging your battery.
• Never charge a frozen battery. It may explode because of gas
trapped in the ice . Allow a frozen battery to thaw out first.
• Do not reuse batteries which were frozen. The battery housing
may have cracked and weakened when the battery froze .
• Charge the battery in a well ventilated area. Keep away from
open flame or electrical spark . Do not smoke . Hydrogen gas gener ­
ated by the battery is explosive.
• To redu ce the danger of e xplos ion , never connect or disconnect
charger cables while the charger i s operating.
• Fast charging a battery is dangerous and should only be
attempted by a competent technician with the proper equipment.
• Battery acid that may spill during charging should be washed
off with a solution of warm water and baking soda to neutralize
the acid .
0 Note
Never use a fast charger as a booster to start the engine . T his wil l
se rious ly da mage sen sit ive elec tronic componen ts, such a s control
un its, re lays, radio, etc., as well as the battery charger. •
Battery replacement
Th e ne w batt ery must hav e the sam e speci ficat ions and
d im en sions as t he o rigin al equi pmen t b att ery.
Intel ligent energy management in your vehicle is respons ib le for
d istr ibut ing t he e lectr ica l energy t hro ugh out your ve hicl e
~ page 241. The intelligent energy management syste m wil l keep
t h e eng ine ba ttery charge d better then veh icles without t his system .
T o make sure the additional electrical energy is available once again
af te r you hav e cha nged the battery, w e re co mmend tha t you in sta ll
batteries of the same type and manufacture on ly (the same as those
i nsta lled at t he time your vehic le was delive re d ). S pecifi cations a re
listed on the battery housing . Your authorized Audi dea ler wi ll then
code the batter y ma nageme nt control u nit.
If it is not poss ible to use a batt ery o f this ty pe, the new ba ttery must
have the same capacity, voltage (12 vo lts) , amperage, constr uction
and p lug sea lin g.
W hen installing the batter y, ma ke sure the ignition and all electrical
c o nsumers are tur ned off .
0 Note
Make sure the ven tilat io n hose on t he side o f the ba ttery is
conn ected, otherwise fumes or b att ery ac id can leak out .
<£' For the sake of the environment
Because of the proble m of proper d isposal o f a ba ttery, we recom ­
mend your authorized Audi dealer change the battery for you.
B at teri es co nt ain sulf uric acid a nd lead an d mu st alwa ys be
disposed of proper ly in comp liance with a ll environmental regula ­
t ions. Dispos ing o f v ehicle bat ter ie s i mproper ly is very danger ous to
the environment .•
Vehicle care I t •

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Windshield/headlight * washer
container
F ig . 228 Engi ne
co mpa rtm ent: Wi nd­
s hiel d and hea dlight*
w ash er flui d cont ain er
The washer fluid containe r is marked with the symbol¢ on
its cap .
- Before you check anything in the engine compartment,
always r ead and heed all WARNINGS ~
& in "Working
in the engi ne compartment" on
page 271.
- Lift the filler cap tongue to add washer fluid. You can fill
the container to the top.
- Press the cap back onto the filler neck after filling the
container.
You can find the reservoir ca pacity in the table in=> page 337.
To prevent lime residue from building up on the spray jets, use
distilled water when refil ling . Always add a glass cleaner solution
(with frost protection in the winter).
(D N ote
Do not mix engine coolant antifreeze or any other additives to fill up
the windshield washer reservoir. •