2011 AUDI A5 COUPE engine

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- Unscrew the cap~ to the engine oil filling hole
=>
page 279, fig . 207.
- Carefully top off with the app ropriate oil in 0.5 liter doses.
- Check the oil le v e l again after two minutes=>
page 2 79.
- Top off the oil aga in , if necessary .
- S crew the cap bac k on th e fi lling hole.
& WARNING
• While topping off, the oil must not come in contact with hot
engine parts -fire hazard!
• The oil filler cap must be properly secured to prevent oil from
being sprayed on the hot engine and e xhaust system when the
engine i s running · fire hazard!
• If your skin has come in contact with the engine oil , you mu st
s ub sequently cleanse it thoroughly .
0 Note
• Check the oil level using the radio or MMI*. If the message Please
reduce oil level
appears, contact your authorized Audi dealer or other
qualified wo rkshop to have excess o il extra cted if necessary.
• Audi does not recommend the use of oil additives. They may
damage the engine and adversely affect your New V ehicl e
Warranty.
<£> For the sake of the environment
• Under no circumstances can the o il come in contact with the
sew age netwo rk or the so il.
• Observe and fo llow legal reg ulat ions when dispos ing of empty oil
conta iners. •
Changing the engine oil
We reco mmend tha t ha ve your oil chan ged by an auth o ­
ri zed Audi deal er or a qualified s erv ic e sta tion.
Before you check anything in the engine compartment, always read
and heed all WARNINGS=>
& in "Working in the engine compart­
ment" on
page 275.
Th e en gine oi l must be changed a ccording to the i nte rvals spe cifi ed i n
your Warranty
& Maintenance booklet. This is very important because
the lubricating prope rties of oil diminis h gradually during normal
veh icle use.
Under some circumstances the engine o il should be changed more
frequently . Change o il more often if yo u drive most ly sho rt dista nces,
operate the vehicle in dusty areas or under predom inant ly stop-and­
go tra ffic condi tions , or have your vehi cle where tempera tures rem ain
be low freezing for extended per iods.
Detergent ad ditives in the oi l will make fresh oil look dark after the
eng ine has bee n ru nning fo r a short t ime . This is normal a nd is not a
reason to change the oil mo re often than recommen ded .
B eca u se of the prob lem of pro per disposal, along with the s peci al
too ls and necessary expertise required, we strong ly recommend that
you have your o il changed by a n autho rized
Audi dealer or a qualified
serv ice stat io n.
If you choo se to change your oil yourself , please note the following
i m po rtant informat ion:
& WARNING
To reduce the risk of personal injury if you must change the engine
oil in your vehicle yourself :
• Wear eye protection.
• To reduce the risk of burns from hot engine oil, let the engine
cool down to the touch.
~

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& WARNING (co ntinued )
• When removing the oil drain plug w ith your fingers , sta y as far
away as possible . Alway s keep your forearm parallel to the ground
to help p revent hot oil from running down your arm.
• Drain the oil into a container de signed for this purpose, one
large enough to hold at least the total amount of oil in your
engine .
• Engine oil is poisonous. Keep it well out of the reach of chil­
dren.
• Continuous contact with u sed engine oil is harmful to your
skin. Always protect your skin by washing oil off thoroughly with
soap and water.
0 Note
N ever mix o il additives wi th you r engine oil. These a dditives can
damage your engine and adversely affect your Audi L imited New
Vehicle Warranty.
ffi For the sake of the environment
• Before changing your oil, first ma ke s ure you know w here yo u can
prope rly dispose of the used o il.
• Always dispose of used engine oil properly . Do not dump it on
garden so il, wooded areas , into open streams or down sewage drains .
• Recy cle used e ngine o il by taking it to a used eng ine oil colle ction
facili ty in your area, or contact a service statio n.•
Safety first
Engine cooling system
Coolant
The engine coolant performs two functions: it keeps the
engi ne f rom over heat in g and it prote cts the engine fro m
free zing in the winter .
The coo ling system is sealed and generally requires little attention.
Th e cool ing sys tem h as been filled a t the f actory w ith a permanent
coo lant wh ic h does not need to be changed . The coolant consists of a
mi xtu re of water and the manufacturer 's glyco l-basedcoo lant add i­
t ive Gl2++ antifreeze w ith anticor ros ion addit ives (50% for USA
mode ls ; 60% for Ca nadian mode ls). This mixture both ass ures the
necessa ry frost protect ion and p rotects meta l components in the
engine's cooling system from corrosion and scaling. It also raises the
boiling poin t of the coo lant.
Do not red uce the concentrat io n of the coolant in t he summer by
adding p lain wate r. The proportion of coolant additive must be at
least 50 % but not more than 60 %
to maintain antifreeze protection
and coolin g efficiency. If the coolan t fros t pro tection is too low , the
coo la nt cou ld freeze and damage t he veh icle heat ing and engine
cooling system .
For year-ro und d riving, a ntifree ze is adde d at the fac to ry fo r tempe r­
atures down to:
• - 31°F(-3 5°C) USA
• -40°F ( -40°() Canada.
Yo u can mix the Gl2 ++ coo lant add itive with other additives (G12 + or
Gl2) . A lways check wi th yo ur auth o rized Audi dealer .
& WARNING
Before you check anything in the engine compartment, always
read and heed all WARNINGS =>
& in "Working in the engine
compartment " on
page 275.
Vehicle care Technical data

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0 Note
• Before w inter sets in, have the coolant checked to see if the
coolant additive in your vehicle is sufficient to meet the climate
conditions. This is especially important if yo u live in a region where
the winter is extremely cold.
If necessary, increase the proportion of
coolant additive to 60% .
• When adding coolant additive to your cooling system, remember :
- We recommend using only coolant additive G12++ (check the
label) for your vehicle. This coolant additive is available at autho­
r iz ed Audi dealers. Other types of antifreeze can s ignificantly
reduce corrosion protection. The resulting corrosion can cause a
loss of coolant and serious engine damage.
• Do not add any type of radiator leak sealant to your vehicle 's
engine coolant. Adding radiator repair flu id may adversely affect the
function and performance of your cooling system and cou ld 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. 208 Engine
co mpartment : Coolant
expansion tank
Before you check anything in the engine compartment,
always read and heed all WARNINGS~ & in "Working in
the engine compartment" on
page 275.
-Turn off the ignition.
- Read the engine coolant level from the coolant expansion
tank~ fig. 208 . With a cold engine, the coolant level
should be between the "MIN" and "MAX" markings. When
the engine is warm, the level may be slightly above the
"MAX" marking.
The locat io n of the coolant expansion tank can be seen in the engine
compartment illustration~
page 276.
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 34 will blink until you add coolant and the level has
been resto red 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 coo ling 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.
In a
sealed system, losses can occur only if the boiling point of the
coo lant is exceeded as a result of overheating .
& 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.

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& WARNING (co ntinued )
• Prote ct your face , hands and arms from escaping fluid and
st eam by covering the cap with a large, thick rag.
• Turn the cap slowl y and very carefully in a counter-clockwise
d irection while applying light, downward pressure on the top of
the cap.
• To avoid being burned, do not spill ant ifreeze or coolant on the
exhaust system or hot engine part s. Under certain conditions , the
e thylene glycol in engine coolant can catch fire .
0 Note
Do not add any type of radia tor leak sealant to your vehicle 's eng ine
coo la nt. Adding radiator repair fluid may adverse ly affect the func­
t ion and pe rforma nce o f yo ur cooling system and could result in
damage not covered by yo ur New Vehicle Limited Warranty. •
Adding coolant
Be very careful when adding engine co olant.
Before you c heck anythi ng in the eng ine co mpart men t,
always read and heed all WARNINGS~ & in "W ork ing in
the e ngine compartm ent" on
page 2 75.
- Turn o ff t he engine.
- Let t he engine cool dow n.
- Place a thi ck rag over the coolan t expans io n tank
~ page 282 , fig . 2 08 a nd carefully turn the ca p cou nter­
clockw ise
~ & .
- Ad d cool ant .
- Twist t he ca p on again
tightly.
Safety first
Replaceme nt eng ine coolant must conform to exact spec ifications
=> page 281, "Cool an t". Even in an emerge ncy, i f coolan t additive
Gl2 ++, Gl2+ or Gl2 is not available, do not use a different add itive .
U se plain water instead until you can get the correct additive and ca n
restore the correct ratio . This should be done as soon as possible .
If you have lost a considerable amount of coolant, then you shou ld
add co ld antifree ze and co ld wate r only w hen t he e ng ine is co ld .
Always use
new engine coo la nt w hen refi lling.
Do not fill coolant a bove the "M AX" mark . Excess coolant will be
forced ou t thr ough t he pr ess ure relief va lve in t he cap when the
engine becomes hot.
& WARNING
• The cooling system i s 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 pre ssure on the top
of the cap .
- To avoid be ing burned, do not spill antifreeze or coolant on
the exhaust system or hot engine parts. Under certain condi­
tions, the ethylene glycol in engine coolant can catch fire.
• Antifreeze i s poisonous . Always store antifreeze in its original
c ontainer and well out of the reach of children .
• If you drain the coolant, it must be caught and safely stored in
a proper container clearly marked "poison ". ..
Vehicle care Technical data

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0 Note
• Coolant pollutes the environment and could 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 a nd antifreeze ::::>
page 281 must be restored as soon
as possible.
ci> For the sake of the environment
Drained coolant should not be reused. Always dispose of used coolant
wh ile observ ing all environmental regulations.•
Radiator fan
The radiator fan switches on automatically by itself.
The radiator fan is driven by the engine v ia the V-belt. The viscous
clutch regulates the speed of the fan according to the temperature of
t he coo lant.
An auxiliary electr ic radiator fan* sw itches on and off depending on
coolant temperature and other vehicle operating conditions.
After you switch the engine off, the auxiliary fan can cont inue running
for up to 10 minutes- even with the ignition off. It can even switch on
again later by itse lf::::>
/1 , if
• the temperature of the engine coolant rises due to the heat build­
up from the engine in the engine compartment, or
• the engine compartment heats up because the veh icle is parked in
intense sunlight.
& WARNING
• To reduce the risk of personal injury never touch the radiator
fan.
/1 WARNING (continued)
• The auxiliary electric fan is temperature controlled and can
switch on suddenly even when the engine is not running.
• The auxiliary radiator fan switches on automatically 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 . 209 Engine
co mpartm ent : Brake
fluid reservoir
Before you check anything in the engine compartment,
always read and heed all WARNINGS=> & in "Working in
the engine compartment" on
page 275.
-Read the brake fluid level from the brake fluid reservoir
=> fig. 209. The brake fluid level must be between the
"MIN" and "MAX" markings.
The brake fluid reservoir is located at the rear partition of the engine
compartment on the left side=>
page 276. .,

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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 a irbag deployment, the battery is disconnected
from the vehicle e lectrical system for safety reasons=>
& in "Repair,
care and disposal of the airbags" on
page 204.
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 aga in . To
prevent this, the battery should only be disconnected from the
vehicle electrical system when absolutely necessary for repairs.
Vehicles not driven for long periods
If you do not dr ive 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 243.
Take into consideration that when you unlock you r vehicle, some
convenience functions, such as the master key remote function or
power seat adjustment, may not be available. The convenience func­
tions will be available again when you turn on the ign ition and start
the engine.
W inter operation
During the w inte r months, battery capacity tends to decrease as
temperatures drop. This is because more power is also consumed
wh ile 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 dealer
check the capacity of the vehicle battery before winter sets in
=> page 288. A well charged battery will not only prevent starting
problems when the weather is cold, but will also last longer.
W 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 anyth ing in the lu~gage compart­
ment,
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 "" ------------------~::....::..:..._~---=---
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 rea ch 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 l~ad
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 open­
ings.
- If you get battery acid in your eyes or on your skin, imm~di­
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.
Safety first
& WARNING (continued)
• When working on the battery, be sure not to short-circuit the
terminals with tools or other metal objects. This would cause the 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. I! 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°C).
• 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. .,,_
Vehicle care Technical data

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& WARNING
California Proposition 65 Warning:
• Battery post s, terminal s and related ac cess orie s co ntain lead
and lead compounds, chemicals known to the State of California
to caus e cancer and reprodu ctive pr oblem s. Wa sh hand s after
handling .
0 Note
• Do not disconnect the vehicle battery when the ignition is
switched on or when the engine is running, otherwise, you wi ll
damage electro nic components in t he e lectr ical system .
• If your ve hicle is go ing to st and for a long per iod of time witho ut
being d riven, protect the battery from "freezing", ot herw ise it will be
damaged and will then have to be replaced. •
Battery charging
Starting the engine requires a well charged battery .
Fig. 21 0 En gine
c om partme nt: C on nec­
t or s fo r ch arge r and
jump er ca bles
Always read and heed all WARNINGS below ~ & and ~ &
i n "Work ing o n the batte ry" on
page 286 .
-Turn o ff t he ign it ion and all electrica l cons umers. -
Make sure the area is well vent ilate d wh en you c harge the
ba ttery .
- Open t he e ngi ne hood =?
page 274.
- O pen the red cover on the positive pole =? fig. 21 0.
- Con nect the charger con nectors accordi ng to the instruc-
tions to the
jump start bolts . (B olts un der the red cover =
"positive" , Bo lts w it h hex head = "negative") .
- Only now p lug t he ma ins lead for t he c har ging equipme nt
i n to t he wall outlet and tu rn it on ~ & .
-Make sure the charging rate is not over 30 amps /14 .8
Volt.
- When t he batte ry is fu lly c harged: Tu rn the cha rg ing
eq uipment o ff an d
remov e the main s le ad from the wa ll
out let.
- Now remove the clamps for the charging equipment.
- Close the re d cover on the positive pole .
Cl ose the hood ~
page 2 75.
A d ischa rged b atte ry can freeze at t empe ra tures of only 3 2 °F (0 °( ).
Allow a fro zen ba ttery to thaw comp letely before attempt ing to
c harge it =:, & . H owever, we recomme nd not using a thawed b attery
again because the battery casing ca n be cracked due to ice formation
and can leak b attery a cid.
Battery charging (Ma ximum charging rate of 30
amp s/14.8 Volt)
When charging at low vol tages (e.g. w ith a trickle charger ), the
b attery cables do not have to be disconnected first. The batte ry caps
should
not be opened when charging a batte ry .
It is not necessary to remove the battery from the luggage compart-
ment.
~