2009 AUDI A4 CABRIOLET fuel

Fuel supply and filling your fuel tank
Fuel supply and filling your fuel tank
Gasoline
Fuel supply
Using the right fuel helps keep the environment clean and
prevents engine damage.
Fuel recommendation
Th e fuel recommended for your vehicle is unleaded premium grade
gasoline. See also=>
page 314, "Data". Audi recommends using TOP
TIER Detergent Gasoline with a minimum octane rating of 91 AKI (95
RON). For more information on TOP TIER Detergent Gasoline, please
go to the official website (www .toptiergas.coml.
The recommended gasoline octane rating for your engine can also be found on a label located either on the driver's side B-pillar (visible
when the door is open) or inside the fuel filler flap. This rating may
be specified as AKI or RON.
Your vehicle may also be operated using unleaded regular gasoline
with a minimum octane rating of 87 AKl/91 RON. However, using 87
AKl/91 RON octane fuel will slightly reduce engine performance.
Use unleaded gasoline only. Unleaded gasoline is available
throughout the USA, Canada, and in most European countries. We
recommend that you do not take your vehicle to areas or countries
where unleaded gasoline may not be available.
For more information on refueling your vehicle, see=>
page 245.
Octane rating
Octane rating indicates a gasoline's ability to resist engine
damaging "knock" caused by premature ignition and detonation.
The refore, buying the correct grade of gasoline is very important to
help prevent possible engine damage and a loss of engine perfor ­
mance. Gasoline most commonly used
in the United States and Canada has
the following octane ratings that can usually be found on the filler
pump:
• Pr emium Grade: 91 -96 AKI
• Regular Grade: 87 -90 AKI
Explanation of the abbreviations:
AKI = Anti Kno ck Ind ex= (R+Ml/2 = (RON+MON)/2
RON= Research Octane Number
MON = Motor Octane Number .
0 Note
• Do not use any fuel with octane ratings lower than 87 AKI or 91
RON otherwise expensive engine damage will occur .
• Do
not use leaded gasoline. The use of leaded gasoline will
severely damage your vehicle's catalytic converter and its ability to
control exhaust emissions. •
Blended gasoline
Use of gasoline containing alcohol or MTBE (methyl
tertiary butyl ether)
You may use unleaded gasoline blended with alcohol or MTBE (commonly referred to as oxygenates) if the blended mixture meets
the following criteria:
Blend of gasoline methanol (wood alcohol or methyl alcohol)
• Anti-knock index must be 87 AKI or higher.
• Blend must contain no more than 3% methanol.
• Blend must contain more than 2% co-solvents.

•
Ble nd o f gas oline and eth ano l (gr ain al coh ol o r eth yl a lcoho l)
• Anti -knock index must be 87 AKI or higher.
• Blend must not contain more than 10% ethanol.
Blend of gasoli ne a nd MTBE
• Anti-knock index must be 87 AKI or higher.
• Blend must contain not more than 15% MTBE.
Seasonall y ad ju ste d ga solin e
Many gasoline grades are blended to perform especially well for
winter or summer driving . During seasona l change -over, we suggest
that you fil l up at busy gas stations where the seasonal adjustment
is more likely to be made in time.
0 Note
• Methanol fuels which do not meet these requirements may
cause corrosion and damage to p lastic and rubber components in
the fuel system.
• Do not use fuels that fail to meet the specified criteria in this
chapter .
• If you are unable to determine whether or not a particu lar fuel
blend meets the specifications, ask your service station or its fuel
suppl ier.
• Do not use fuel for which the contents cannot be identified.
• Fuel system damage and performance problems resu lting from
the use of fuels different from those specified are not the responsi ­
bility of Audi and are not covered under the New Vehicle or the
Emission Control System Warran ties.
• If you experience a loss of fue l economy or driveability and
performance problems due to the use of one of these fue l b lends,
we recommend that you switch to unblended fuel.•
Fue l supply and fillin g yo ur fu el tank
Gasoline additives
A major concern among many auto manufacturers is carbon
deposit build-up caused by the type of gasoline you use.
Although gasoline grades d iffer from one manufacturer to another,
they have certain things in common. A ll gaso line grades contain
substances that can cause deposits to collect on vita l engine parts,
such as fuel injectors and intake valves. Although most gaso line
brands inc lude additives to keep engine and fue l systems c lean,
they are not equally effective.
Audi recommends using TOP T IER Detergent Gasol ine. For more
information on TOP TIER Detergent Gaso line, please go to the offi­
cial website (www.toptiergas .coml.
After an extended period of using inadequate fue ls, carbon deposit
build -ups can rob your engine of peak performance.
(D Note
Damage or malfunction due to poor fuel qua lity is not covered by
the Audi New Vehic le Limited Warranty .•
Fuel tank
Fuel filler neck
The fuel fi ller neck is located on the right rear side panel behind the
fue l filler f lap.
If the power locking system should fail, you can still open the flap
manually - for detailed instructions see~
page 248.
You can find the fuel tank capacity of your vehicle in Tech nic al Dat a
~ page 314 . _,.
Ve hic le care

Fuel supply and filling your fuel tank
The labe l on the inside of the fuel filler flap tells you the correct fuel
f o r your vehicle . Fo r m ore inf ormatio n about f uel specifica tions, see
~ page 244.
Y our vehicle fuel tank has an on -b oard refuelling vapor recove ry
system. This feature he lps to preve nt fuel vapors from escap ing
from the tank and polluting the environment while you refue l you r
veh ic le . I n o rder t o fill the tank properly while protec ting the envi ­
ronmen t, please follow this re fueling procedure carefully .
L1}. WARNING
Under normal operating conditions , never carry additional fuel
containers in your car. Gas canisters and other containers used to
transport fuel can be dangerous . Such containers , full or empty,
may leak and could cau se a fire in a collision . If you must transport
fuel to use for your lawn mower , snow blower , etc ., be very careful
and alway s ob serve local and state laws regarding the u se , tran s­
portat ion and storage of su ch fuel container s. Make certain the
c ontainer meets industry standard s (ANSI/ASTM F852 -861 .
0 Note
Never d rive your vehic le un til the fue l tank is co mpletely empty . The
irregular supply of fuel can cause misfiring . Gasoline could enter
t he exhaus t system and damage the catalytic converter . •
Refuelling
Fi g. 191 Rig ht v ehi cle
si de , st andi ng beh ind
the rear whe el:
opening the fuel filler
flap ,
F ig . 19 2 Fuel cap
s itting on th e opened
fuel filler f lap
W hen a dding fuel, th e i gnit io n a nd any ce llular ph ones in
th e v ehicl e m ust be sw itch ed off.
Taking the fuel cap off
Press the rig ht side o f the f uel fi ller fla p to ope n it
=> fig .19 1.
Unsc rew fuel filler cap co unter-clock wise and han g it o n
t h e fuel fille r flap .
~

•
Refuelling procedure
-Insert the fue l nozzle from the gaso line pump i nto the
fue l fi ller neck as far as it w il l go.
- Select a medium refue lling rate so that the nozzle
swi tches off automatica lly w hen the tank is ful l.
Putting the fuel cap back on
-Aft er fillin g yo ur ta nk, twist th e fue l fille r cap clockw is e
unt il you hear a de finit e cli ck .
- Cl ose the fue l fille r flap.
To avo id fu el sp illing or evapora ting from the fuel tan k always close
fu el filler cap p rop erly and co mplet ely . An i mprope rly clo sed fue l
fi ller cap may a lso cause a messa ge in the dr iver in fo rm ation display
=>
page 27 or cause the MIL lamp=> page 27 to come on.
,& WARNING
Improper refueling or handling of fuel can cause fire, explosion
and severe burns .
• Fuel is highly flammable and can cause severe burns and other
injuries .
• Failure to shut the engine off while refueling and /or to insert
the pump nozzle fully into the fuel filler ne ck could cause fuel to
spray out of filler neck or to overflow. Fuel spray and overflowing
fuel can cause a fire .
• Never use a cellular telephone while refueling . The electromag ­
netic radiation can cause sparks that can ignite fue l vapors and
c ause a fire .
• Never get ba ck into your vehicle wh ile refueling . If in e xcep ­
tional circumstan ces you must get ba ck in your vehicle while refu­
eling , make certain that you close the door and touch metal to
di scharge static electricity before touching the filler nozzle again.
Fu el supply and filling your fu el tank
& W ARNING (continued )
Static electricity can cause sparks that can ignite fuel vapors
released during refueling .
• Never smoke or have an open flame anywhere in or near your
vehicle when refueling or filling a portable fuel container.
• For your safety , we strongly recommend that you do not travel
with a portable fuel container in your vehicle. The container , full or
empty may leak and could cause a fire , especially in a crash .
• If, under e xcept ional circumstances , you must transport a
portable fuel container, please observe the following:
-Never fill a portable fuel container while it is anywhere
in or
on the vehicle (for example , in the luggage compartment , or on
the trunk) . Static electricity can build up while filling and can
ignite fuel vapors causing a fire.
- Always place a portable fuel containe r on the ground before
filling.
- Always keep the filler nozzle completely inside the portable
container before and during filling .
- If filling a portable container made of metal , the filler nozzle
must always be in contact with the container. Thi s will help
prevent static ele ctricity from discharging and cause a fire.
- Never spill fuel inside the vehicle or luggage compartment .
Fuel vapors are h ighly flammable .
- Always observe local and state/provincial laws regarding the
use , storage and transportation of fuel conta iners.
- Make certain the fuel container meets indu stry standards
(ANSI / ASTM F852-86).
0 Note
If any fuel has spil led onto the car , it should be removed immedi -
ate ly to prevent da mage to the pa int. _,.
Vehic le care

Fuel supply and filling your fuel tank
ffi For the sake of the environment
As soon as the correctly operated nozzle switches off automatical ly
for the first time, the tank is full. Do not try to add more fuel because
fuel may spill out. In addi tion, the expansion space in the fuel tank
will be filled -causing the fuel to overflow when it becomes warm
and po llute the environment.
[ i ) Tips
• Running your engine while refuelling may cause vapors to
escape or even cause fuel to spill out of the tank. This would then
shut off the fue l nozzle before the tank is full.
• Do not refuel your vehicle with the ignition turned on. The fuel
gauge may otherwise not indicate the correct fuel level after
refuelling. •
Unlocking the fuel filler flap by hand
You can open the fuel filler flap by hand if the power
locking system should fail .
Fig. 193 Inside the
luggage compartment:
Opening the fuel filler
flap
by ha nd
If the power locking system should fail, you can still open
the flap manually:
- Open the rear lid. -
Open the round cover in the side trim panel on th e right
side.
- Pull the actuator in the direction of arrow to release the
fuel filler flap~ fig. 193.
- Open the fuel filler flap. •

-~_C_ h_e _c _ k_ i_ n ...:::g:;..._ a_n_ d_ f_ i_ll _in ....;g:::;.._ ___________________________________________ _
Closing the engine hood
-Pull t he hood down until the pressure from the strut is
reduced.
- Let t he hood
drop down and latch in place. Do not try to
push it shut;
it may fai l to engage ~& .
& WARNING
A hood that is not completely latched could fly up and block your
view while driving.
• When you close the engine hood, check it to make sure the
safety catch has properly engaged. The hood should be flush with
the surrounding vehicle body parts.
• If you notice while driving that the hood is not secured prop­
erly, stop at once and close it. •
Working in the engine compartment
Be especially careful whenever you work in the engine
compartment.
Whenever you must perform any work in the engine compartment,
for example checking and filling different fluids, there is a risk of injury, burns and accidents. To prevent personal injury always
observe the following WARNINGS. The engine compartment of any
vehicle is a hazardous area
~ 6 .
& WARNING
To help avoid injury, before you check anything under the hood :
• Turn off the engine.
• Remove the ignition key.
• Apply the parking brake.
& WARNING (continued)
• Move selector lever of automatic transmission to "P" (Park);
put manual transmission 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 compart­
ment. Wait until no steam or coolant can be seen or heard before
carefully opening the hood .
• Keep children away from the engine compartment.
• Never spill fluids on hot engine components. They can cause a
fire.
• Never touch the radiator fan. The auxiliary electric fan is
temperature controlled and can switch on suddenly.
• Never open the coolant reservoir cap when the engine is still
warm. The coolant system is pressurized and hot coolant 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.
• If work on the fuel system or the electrical system is necessary :
- Always disconnect the battery .
- Never smoke or work near heaters or open flames. Fluids in
the engine compartment could start a fire.
- Keep an approved fire extinguisher immediately available.
• To avoid electrical shock and personal injury 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:
~

-~_C_ h_e _c _ k_ i_ n ...:::g:;..._ a_n_ d_ f_ i_ll _in ....;g:::;.._ ___________________________________________ _
the form of Service or Repair Orders that all scheduled maintenance
was performed in a timely manner. •
Engine oil consumption
The engine in your vehicle depends on an adequate
amount of oil to lubricate and cool all of its moving parts.
In order to provide effective lubrication and cooling of internal
engine components , all internal combustion engines consume a
certain amount of oil. Oil consumption varies from engine to engine
and may change significantly over the life of the engine. Typically,
engines with a specified break -in period (see~
page 219) consume
more oil during the break-in period than they consume after oil
consumption has stabilized.
Under normal conditions, the rate of oil consumption depends on
the quality and viscosity of the oil, the RPM (revolutions per minute)
at which the engine is operated, the ambient temperature and road
conditions. Further factors are the amount of oil dilution from water
condensation or fuel residue and the oxidation level of the oil. As
any engine is subject to wear as mileage builds up , the oil consump­
tion may increase over time until replacement of worn components
may become necessary .
With all these variables coming into play, no standard rate of oil
consumption can be established or specified. There is no alternative
to regular and frequent checking of the oil level, see
Note.
If the yellow engine oil level warning symbol in the instrument
cluster lights up, you should check the oil level as soon as
possible
with the oil dipstick~ page 254. Top off the oil at your
earliest convenience~
page 255.
& WARNING
Before you check anything in the engine compartment, always
read and heed all WARNINGS
~ & in "Working in the engine
compartment" on
page 250.
0 Note
Driving with an insufficient oil level is likely to cause severe damage
to the engine.
[ i] Tips
• The oil pressure warning display 't!::r. is not an indicator of the oil
level. Do not rely on it. Instead, check the oil level in your engine at
regular intervals, preferably each time you refuel, and always before
going on a long trip.
• If you have the impression your engine consumes excessive
amounts of oil, we recommend that you consult your Audi dealer to
have the cause of your concern properly diagnosed . Keep in mind
that the accurate measurement of oil consumption requires great
care and may take some time . Your Audi dealer has instructions
about how to measure oil consumption accurately. •
Checking the engine oil level
Fig. 198 Illustration of
principle 1: Markers on
oil dipstick ..,_

Checking and filling -_____________ _______::;____;;:;;____...j
Fig. 199 Illustration of
principle 2: Markers on
oil dipstick
Before you check anything in the engine compartment,
always read and heed all WARNINGS=> & in "Working in
the engine compartment" on
page 250.
Determining oil level
Park your vehicle so that it is horizontally level.
- While at operating state temperature, briefly let the
engine run at idle and then shut it off.
- Wait approx. two minutes.
- Pull out the oil dipstick. Wipe off the oil dipstick with a
clean cloth, and slide it back in as far as it will go.
- Pull it back out and read off the oil level
=> page 254,
fig. 198 or:::> fig. 199. Top off the engine oil, if applicable
=> page 255.
Oil level within range @
- Do not add oil.
Oil level within range G)
- You con add oil. Afterwords, the oil leve l should be within
range @.
Oil level within range ©
-You must add oil. Afterwords, the oil level should be
within range @.
The oil level needs to be checked at regular intervals . The best times
to do this are whenever you refuel and prior to long trips.
Depending on the way the vehicle is driven and the operating condi­
tions, oil consumption can be up to 1 quart p er 1.200 miles (1 liter
per 2.000 km). Consumption may be higher within the first 3.000
miles (5.000 km). •
Adding engine oi l 'e::1':
Vehicle care
Fig . 200 Oil filler cap
loc ation: 2.0 liter, 4-
cylinder turbo engine
Fig . 201 Oil filler cap
location: 3.2 liter , VG-
engine _,,
irechnical data