2015 AUDI S3 engine

210 Checking and Filling
Checking and Filling
Gasoline
Fuel supply
Applies to vehicles: with gasoline engine
Using the right fuel helps keep the environ­
ment clean and prevents engine damage .
Fuel recommendation
The fuel recommended for your vehicle is un­
leaded premium
grade gasoline . Audi recom­
mends using TOP TIER Detergent Gasoline
with a minimum octane rating of91 AKI (95
RON) . For more information on TOP TIER De ­
tergent Gasol ine, please go to the official
website (www .toptiergas.com).
The recommended gasoline octane rating for
your engine can also be found on a label locat­
ed on the ins ide of the fuel filler flap. This rat­
ing may be specified as AKI or RON .
Your vehicle may also be operated using un­
leaded regular gasoline with a minimum oc ­
tane rating of 87 AKI/91 RON . However, using
87 AKI/91 RON octane fuel w ill slightly re­
duce engine performance.
Use unleaded gasoline only. Unleaded gaso­
line is available throughout the USA, Canada,
and in most European countries. We recom­
mend that you do not take your vehicle to
areas or countries where unleaded gasoline
may not be available.
For more information on refueling your vehi­
cle, see
~ page 212.
Octane rating
Octane rating ind icates a gasoline's ability to
res ist engine damaging "knock" caused by
premature ign ition and detonation . Therefore,
buying the correct grade of gasoline is very
important to help prevent possible engine
damage and a loss of engine performance.
Gasoline most commonly used in the United
States and Canada has the following octane
r atings that can usually be found on the filler
pump : - Premium Grade: 91
-96 AKI
- Regular Grade: 87 -90 AKI
Explanation of the abbreviations:
AKI= Anti Knock Index= (R+M)/2 = (RON
+MON)/2
RON= Research Octane Number
MON = Motor Octane Number .
@ Note
-Do not use any fuel w ith octane ratings
lower than 87 AKI or 91 RON otherwise
expensive engine damage w ill 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
Applies to vehicles: with gasoline engine
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 AK I or higher.
- Blend must contain no more than 3% meth-
anol.
- Blend must contain more than 2% co-sol-
vents.
Blend of gasoline and ethanol (grain alcohol
or ethyl alcohol)
-Anti-knock index must be 87 AKI or higher.
- Blend must not contain more than 15%
ethanol.
Blend of gasoline and MTBE
-Anti-knoc k index must be 87 AK I or higher.
- Blend must contain not more than 15%
MTBE.
Seasonally adjusted gasoline

Many gasoline grades are blended to perform
especially well for winter or summer driving. During seasonal change-over, we suggest that
you fill up at busy gas stations where the sea­ sonal adjustment is more likely to be made in
time.
Q;) Note
- Methanol fuels which do not meet these requirements may cause corrosion and
damage to plastic and rubber compo­ nents 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 particular fuel blend meets the
specificat ions, ask your service station or
i ts fuel supp lier.
- Do not use fuel for which the contents cannot be identified.
- Fuel system damage and performance
problems resulting from the use of fuels
different from those specified are not
the responsibility of Audi and are not
covered under the New Vehicle or the
Emission Control System Warranties.
- If you experience a loss of fuel economy
or driveability and performance prob­
lems due to the use of one of these fuel
blends, we recommend that you switch
to unblended fuel.
Gasoline additives
A major concern among many auto manufac­
turers is carbon deposit build-up caused by
the type of gasoline you use .
Although gasoline grades differ from one manufacturer to another, they have certain
things in common. All gasoline grades contain substances that can cause deposits to collect
on vital engine parts, such as fuel injectors
and intake valves. Although most gasoline
brands include additives to keep engine and
M
N fuel systems clean, they are not equally effec-o
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Checking and Filling 211
Audi recommends using TOP TIER Detergent
Gasoline . For more information on TOP TIER
Detergent Gasoline, please go to the official
website (www.toptiergas .com).
After an extended period of using inadequate
fuels, carbon deposit build-ups can rob your engine of peak performance.
CJ) Note
Damage or malfunction due to poor fuel
quality is not covered by the Audi New Ve­
hicle Limited Warranty.
Diesel fuel
App lies to vehicles : wit h diese l eng ine
Always use ULSD (Ultra Low Sulfur Diesel)
No. 2 . The ULSD No. 2 meets the ASTM D975.
Diesel fuel with concentrations of biodiesel
higher than 5
% such as B11, B2O or B1OO are
strictly prohibited.
Service station fuel pumps are labeled with
the correct fuel information for easy recogni­
tion by the user.
If the diesel fuel pump is not
labeled ask the station operator what fuel is
being dispensed before filling up your vehicle.
ULSD No. 2 may not be available outside the
USA and Canada. Be sure to check before trav­
eling to other countries.
ULSD No. 2 can become thicker in very cold
temperatures, and this can impair the en­
gine's starting and running. Depending on the
season, gas stations provide ULSD No . 2 that
flows better in cold temperatures so that you
can continue operating your vehicle as usual.
(D Note
- Your vehicle's diesel engine was de­
signed solely for use with ULSD No. 2.
Therefore, never use gasoline, heating
oil, other fuels or flow improvers. These
contain substances that will severely
damage the fuel system and the engine.
Such damage will not be covered by your
New Vehicle Limited Warranty.
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212 Checking and Fill in g
- If you put any amount of incorrect fue l in
the fue l tank, do not start the engine un­
der any circumstances. Immediately con­
tact the nearest authorized Audi dealer
or authorized Audi Service Facility for as­
sistance. These fuels contain substances
that can severely damage the fuel sys­
tem and the engine if the engine is start­
ed.
- If the diesel fuel quality is poor, it may
be necessary to have the water drained
from the water sepa rator in the
f ue l fi l­
te r
more often than specified in the
maintenance schedu le . This can help re­
duce engine ma lfunctions
Q page 24.
Fuel tank
Fuel filler neck
The fuel filler neck is located on the right rear
side panel behind the fuel fi ller flap.
If the power locking system should fail, you
can st ill open the flap manually- for detailed
instructions
seer:::.> page 214.
You can find the fuel tank capacity of your ve­
hicle in
Qpage 288.
The label on the inside of the fuel filler flap
tells you the correct fuel for your vehicle. For
more information about fuel specifications,
see
c;,page 210.
Your veh icle fuel tank has an onboard refue l­
ling vapor recovery system . This feature helps
to prevent fuel vapors from escaping from the
tank and polluting the environment while you refuel your vehicle . In order to fill the tank
properly while protect ing the env ironment,
p lease follow t his refueling procedure careful­
ly.
.&_ WARNING
Under norma l operating conditions, neve r
carry additiona l fuel containers in your car .
Gas can isters and other containers used to
transport fue l can be dangerous. Such con­
tainers, full or empty, may leak and cou ld
cause a f ire in a collision. If you must transpo
rt fuel to use for your lawn mower,
snow b lower, etc., be very careful and al­
ways observe local and state laws regard­ ing the use, transportation and storage of
such fuel containers. Make certa in the con­
tainer meets industry standa rds (ANSI/
ASTM F8S2 -86).
(D Note
Neve r drive your veh icle until the fue l tank
i s completely empty. The irregular supply
of fue l can cause misfir ing. Gasoline cou ld
enter the exhaust system and damage the
catalytic converter.
Fueling procedure
F ig. 15 1 Righ t rear side of the vehicle: opening the
fuel filler flap
Fig . 1 52 Fue l filler door w ith attached fuel cap
Read and follow the information and warn­
ings when filling Ad B lue
c;, page 215.
T he fue l filler door is u nlocked or locked by
the centra l locking sys tem.
Openin g the fuel c ap
" Press the left side of the fuel f iller door to
open it -arrow-
Q fig. 151.
"Unscrew the tank cap counterclockw ise .
-;:;
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~ Place the cap from above on the open fuel
filler door
¢ fig. 152.
Closing the fuel cap
~ Turn the fuel cap clockwise until you hear it
lock.
~ Close fuel filler door until it latches.
Once the pump nozzle switches off, the fuel
tank is "full". Do not fill the tank more. Other­
wise the expansion space in the tank will be
filled.
The correct fuel type for your vehicle can be
found on a label located on the inside of the
fuel filler door. For additional information on
fuel, refer to ¢
page 210.
The fuel tank capacity of your vehicle is in the
Technical Data ¢ page 288.
To avoid fuel spilling or evaporating from the
fuel tank always close fuel filler cap properly
and completely. An improperly closed fuel fill­
er cap may also cause the MIL lamp ¢
page 30
to come on .
A WARNING
Not paying attention when fueling or han­
dling fuel incorrectly can lead to fires, ex­
plosions or serious injuries.
- Fuel ignites easily and can cause serious
burns and other injuries.
- If you do not switch the engine off when
fueling and/or do not insert the fuel noz­
zle completely into the tank opening,
fuel can leak out or run over. Leaked fuel
can ignite and start a fire.
- Do not use the telephone while fueling.
The electromagnetic rays can cause
sparks, which can ignite fuel vapors and
start a fire .
- Do not sit in your vehicle while fueling. If
you must make an exception and enter
your vehicle again while fueling, close
the door and touch metal to discharge
static electricity before touching the fuel
nozzle. Static electricity can create
sparks, which can ignite vapors when fu­
eling.
Checking and Filling 213
- Do not smoke or have an open flame in
the area when fueling your vehicle or fill­
ing a fuel container because this increas­
es the risk of an explosion .
- For your safety, carrying fuel containers
in your vehicle is recommended. Wheth­
er full or empty, the container can leak
and cause a fire in the event of an acci­
dent.
- If you must make an exception and
transport a fuel container, note the fol­ lowing:
- Never fill the fuel container with fuel
while it is in or on the vehicle. Static
electricity is discharged when filling
which can cause the fuel vapors to ig­ nite and increases the risk of an explo­
sion.
- Always place a fuel container on the
ground before filling.
- Always hold the fuel nozzle completely
in the fuel container when filling .
- If the fuel container is made of metal,
the fuel nozzle must always be in con­
tact with the container when filling it
with fuel. This prevents static electrici­
ty from discharging.
- Never spill fuel in the vehicle or the
luggage compartment. Evaporated fuel
is explosive and increases the risk of
serious injury or death.
- Follow legal requirements when using,
storing and transporting fuel contain­
ers.
- Make sure the fuel container conforms
to industry standards (ANSI/ASTM
F8S2-86).
@ Note
- Remove spilled fuel from vehicle paint
immediately, because it can damage
paint.
- Never drive until the fuel tank is com­
pletely empty . The irregular supply of
fuel that results from that can cause the
engine to misfire. Uncombusted fuel will
enter the exhaust system and increase
1111-
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214 Checking and Fill in g
the risk of damage to the catalytic con ­
verter .
- If the fuel tank runs comp letely empty in
a vehicle with a
die sel en gine , the igni­
tion must remain switched on for at l east 30 seconds after refueling before
starting the engine.
It may take longer
than usual for the engine to start, even up to a minute . Th is is because the air
must fi rst b leed out of the fuel system
when starting the eng ine.
@) For the s ake of the environment
- If the fuel nozzle is used correctly , it will
indicate that the tank is full the first
time it switches off automatically. Do
not t ry to add more fuel, because it can
spill over. Also , the expansion space in
the tank will fill, which can resu lt in fuel
spilling out when it becomes warm and po lluting the environment .
@ Tips
-If the engine is runn ing whi le fueling, va­
pors can escape or the fuel can spi ll over.
Because of this , the fuel nozz le switches
off before the tank is full.
- Do not fuel the vehicle when the ignition
is switched on. Otherwise, the fuel
gauge may not show the correct level af­
ter fueling the vehicle.
- Diesel vehicles are equipped with a diesel misfueling guard
ll. It allows the vehicle
to be fueled only with a diese l fuel pump
nozzle.
- A worn or damaged nozzle or a nozz le
that is too small may not be able to open
the d iesel m isfueling protector . If this is
the case, try t urni ng the nozzle before
i nserting it in the f uel filler neck, use a
different fuel p ump or see you r a uthor­
i zed Audi dealer or author ized repair fa­
cility for assistance .
- The m isf ueli ng guard does not open
when adding fuel from a fuel container .
ll Market-sp ec ifi c
You can bypass it by adding the diesel
fuel s lowly.
- The fuel fi ller door on your vehicle does
not lock when you lock the vehicle from
the inside.
· Fuel filler door emergency release
If the central locking system is faulty, the
fuel filler door can be unlocked manually.
Fig. 153 Right re ar lugg age compa rtm ent : eme rgency
re lease
T he emergency release mechanism is located
behind the right side trim panel in the lug­
gage compartment .
" Remove the cover i n the side pane l.
" Loosen the loop from the retaine r and then
pull on the loop carefu lly-arrow-
¢ (D . The
fue l filler door is released .
" To open the fue l filler door, press on the left
side
r=> page 212, fig. 151 .
(D Note
Only pull on the loop until yo u feel resist­
ance. You w ill not hear it re lease. Other­
wise you could damage the emergency re­
lease mechanism.

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Selective catalytic reduction
General information
Applies to vehicles: with diesel e ngine
In vehicles with se lective cata lytic reduction, a
urea solut ion (Ad Blue) is injected into the ex­
haust system before a nitrogen oxide catalytic
converter to reduce nitrogen -emissions .
Ad Blue is the marketing name for Diese l Ex­
ha ust Fluid (DEF) .
The AdBlue is carried in a separa te tank in t he
vehicle . The AdBl ue usage accounts for ap­
proximately 0.5% to 1.2% of the diese l fuel
that is used .
When a message abo ut refil ling the Ad Blue
appears in the inst rume nt cl uste r dis play, you
must refi ll the Ad B lue yourse lf or have it refil­
l ed by an authorized Audi dealer or aut horized
Aud i Service Facility
Q page 216.
A WARNING
Failure to heed Ad Blue refill information in
the inst rume nt cluste r can p revent the
ve­
hicle from being started and driven . If the
veh icle cannot be driven and an eme rgency
ar ises, perso na l inju ry can occur.
- Always have the Ad Blue tank refilled well
before the tank r uns d ry.
(!) Tips
- The instrument cluster display indicates
the d istance remaining that ca n be dr iv ­
en
Q page 215. If the AdBlue tank is
complete ly empty, the engi ne will not
sta rt again after the ign ition is switched
o ff.
- Ad B lue is requ ired by law to operate this
vehicle.
Che cking and Fillin g 215
Indicators in the instrument cluster
d isplay
Appl ies to vehicles: with diesel engine
Th e display indicates if th e Ad Blue lev el is low
or if there is a system malfunction.
Fi g. 1 54 Ins trum ent cluster : indicator in the display
AdBlue level low
You w ill be informed if t he AdBlue in the ta nk
drops below a certain leve l.
Ad Blue /9 Please refill Ad B lu e. Range
1500 mi (2400 km)
T his ind icator appea rs whe n there is only
eno ugh Ad Bl ue left to d rive the distance i ndi­
cated in the driver information system. F ill
the Ad Blue .
AdBlue /9 Refill AdBlue! No re start in
600 mile s (1000 km )! See owner' s manual
This indicator appears when there is only
enough AdBlue left to drive the distance indi ­
cated in the dr iver information syst em. F ill
the Ad Blue. Otherwise the eng ine will not
star t again if you s top it o nce the dis tance in­
dicated has been drive n. As long as the
AdBlue /9 ind icator light is on, yo u can
check the remaining range in the trip comput­
er* .
Refill AdBlue! Engine start not
po ssible! See owner' s manual
This message appears w hen the Ad Blue tank
i s emp ty. Fill the AdB lue. Othe rw ise you w ill
not be able to sta rt the engine ag ain on ce you
stop it .
T he Ad Blu e mu st be refilled when the amount
i n the tank has rea ched t he minim um level
Q poge 216.

216 Checking and Filling
¢..ij Incorrect filling /sy stem malfunction
A message ap pears if the Ad Bl ue tank was fil­
l ed with a fluid other t han Ad B lue and the sys ­
tem has detected t hat the tank was fi lled in­
correctly, or if the re is a system malfunction .
Ad Blue/ Ad Blue: Sy stem fault! No re start
in 600 miles (1000 km ). See owner' s man­
ual.
This message appears whe n it is only poss ible
to drive the distance i ndi cated in the dr iver in­
formation system. Drive to the neares t au­
thorized A udi dealer or author ized A udi Se rv­
ice Facility to have the ma lfunction co rrected.
Otherwise the engine will not start again if
you stop it once the distance i nd icated has
been drive n.
AdBlue: system fault . Engine
start not possible! See owner 's manual
This message appears if the system has de ­
tected t hat the ta nk was fi lled incorrectly or
that the re is a ma lfunction . Drive immediate ly
to the nearest authorized A udi dealer or au­
thor ized Audi Serv ice Facility to have the ma l­
function corrected . Otherwise you will not be
ab le to start the engine aga in o nce you stop
it .
Filling the Ad Blue
App lies to vehicles: with selective cata lyt ic reduction
A special refill bottle must be used to fill the
AdBlue .
Fig. 155 R ig ht re ar s id e of th e v ehi cle: re mov ing the
Ad Blue cap
F ig . 1 56 AdBl ue f ille r tube: i nse rtin g the ref ill bottl e
The Ad Blue tank ope ning is located near the
di ese l ta nk open ing . A lways ad d 1 gallon (3.8
li te rs) of AdB lue ( two bottles). This is the min­
i mum amo unt req uired to ensure the system
de te ct s the refilling and to s tart the engine .
T he Ad Blue tank holds approximately
4 gal ­
lo ns
(1 5 liters) .
Opening the filler tube and adding
AdBlue
Req uirement : The request to add Ad Blue mus t
appea r in the instrument cluster disp lay.
" Switch th e ignit io n off.
.. Open the tank door¢
page 212.
.. Tur n the cap on the tank opening to the left
to remove
¢ fig . 155 .
.. Remove the cap from the ref ill bott le.
.. Posit ion the refill bottle on the filler tube
and tur n the bottle clockwise until it stops
turn ing (D ¢fig .156 .
" Press lightly aga inst the bottom of the bot­
tle @to empty it . Continue pressing the
bo ttom of the bottle unt il it is empty or un ­
t il f lu id stop s flow ing in to the ta nk.
" Turn the bottle to t he left w it h out pressing
on t he bot tom.
Closing the filler tube
" Tur n the Ad B lue cap to the right on the filler
t ube until the cap clicks into pla ce.
" Clo se the tank cover.
After filling
The vehicle must be driven. The system may
ta ke up to two m inutes to detect that the
AdBl ue has been f illed . .,.

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~ If there was no Ad Blue left in the tank and a
range of
O mi (0 km) was displayed in the
instrument cluster, switch the ignition on
for about 15 seconds before starting the en­ gine.
_& WARNING
Ad Blue can irritate the skin, eyes and res­piratory system. If there is contact with
the fluid, flush immediately with plenty of
water. Consult a physician if necessary.
(D Note
- Only use Ad Blue that conforms to the standard ISO 22241-1. Do not mix any
additives with the Ad Blue and do not di­lute it with water .
- Do not add Ad Blue to the diesel tank or
add diesel fuel to the Ad Blue tank. Mix­
ing can lead to damage to the engine
and the Ad Blue tank system. Warranty
does not cover damage caused by this.
- AdBlue attacks surfaces such as painted
vehicle components, plastic and carpet.
Remove the fluid as quickly as possible
with a damp cloth and plenty of cold wa­
ter. If the Ad Blue has already crystal­ lized, use warm water and a sponge .
AdBlue residue that is not removed will
crystallize and can damage the affected
surface .
- Do not store the refill bottle in the vehi­ cle. If it leaks, the escaping Ad Blue could
damage the vehicle interior.
- Do not allow AdBlue to come into con­
tact with clothing . If there is contact
with the fluid, flush immediately with
plenty of water.
@ Tips
- You can obtain refill bottles from an au­
thorized Audi dealer or authorized Audi
Service Facility.
- Follow the AdBlue manufacturer's in­
structions for use and storage.
Checking and Filling 217
Hood
Working in the engine compartment
Special care is required if you are working in
the engine compartment
For work in the engine compartment such as
checking and filling fluids, there is a risk of
injury, scalding, accidents, and burns. For
this reason, follow all the following listed
warnings and general safety precautions.
The engine compartment is a dangerous
area.
c::> .&. .
_8 WARNING
To reduce the risk of injuries, complete the
following steps before opening the hood:
- Turn the engine off.
- Switch the ignition off.
- Set the parking brake.
- Place the selector lever in the P position.
- Let the engine cool down.
- Never open the hood when you see that
steam or coolant drips from the engine
compartment- there is a danger of burns! Wait until no steam or coolant
flows out .
- Keep children away from the engine com­
partment.
- Never spill fluids on a hot engine . These
fluids (such as the freeze protection con­
tained in the coolant) can catch fire .
- Avoid short circuits in the electrical sys­
tem, especially the battery .
- When working in the engine compart­
ment, remember that the radiator fan
can switch on even if the ignition is
switched off, which increases the risk of
personal injury.
- Never open the cap on the coolant ex­
pansion tank when the engine is warm.
The cooling system is under pressure.
- To protect your face, hands, and arms
from hot steam or coolant, cover the cap
with a large cloth when opening.
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