2015 AUDI S3 SEDAN engine

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The catalytic conve rter is an efficient "clean -up"
device bui lt into the exhaust system of the vehi ­
cle. The catalytic converter burns many of the
pollutants in the exhaust gas before they are re­
leased into the atmosphere.
The exclusive use of unleaded fue l is critically im­
portant for the life of the catalytic converter and
proper functioning of the engine .
A WARNING
The temperature of the exhaust system is
high, both when driving and after stopping
the engine.
- Never touch the exhaust tail pipes once they
have become hot. This could result in burns.
- Do not park or operate the vehicle in areas
where the hot exhaust system may come in contact with dry grass, brush, fue l spill or
other material which can cause a fire .
- Do not apply additional undercoating or
rustproofing on o r near the exha ust man i­
fold, exhaust pipes, catalyt ic converte r or
heat s hields. Dur ing driv ing, the subs tance
u5ed for undercoating could overheat and
cause a fire .
(D Note
-Be awa re that just one tank f illing wit h lead­
ed
f uel will a lready se riously degrade the
performance of the c ata lytic conver ter.
- Do not exceed the co rrect engine oil leve l
9page203.
-Do not d rive until the fuel tank becomes
complete ly empty. The eng ine could misfi re.
U nburned f uel co uld also ge t in to the e x­
haust system and this could ca use the cata ­
l ytic converter to overheat.
- Do no t sw itch off the ignition wh ile the vehi­
cle is moving.
- Do not con tinue to oper ate yo ur vehicle un­
der these cond itions, as o therwise fue l can
r each the catalytic converte r. This cou ld re­
su lt in overheating of the converter, requir­
i ng its replacement.
- To assure efficient ope ration of the Emission
Control System:
Checking and Fillin g
- Have your vehicle maintained properly and
in accordance with the serv ice recommen­
dat ions in yo ur Warranty
& Maintenance
booklet.
- Lack of prope r maintenance as we ll as im­
p roper use of the vehicle will impair the
f u nction of the emission control system
and could lead to damage.
@ For the sake of the environment
Even when the Emission Control System is op­
erating properly, the exha ust gas can have a
su lfur-like exhaust gas sme ll under some op­
erating states. Th is depends on the s ulfur
content of the fuel b eing used. Us ing a diffe r­
ent bra nd of fue l may he lp, or fi lling the tank
wi th lead-free su per grade gaso line.
Diesel particulate filter
App lies to vehicles: wit h diese l eng ine
T he diese l part icu late filter filters nearly all of
the soot pa rticles ou t of the exha ust. The filter
cl ea ns itself a utoma tic all y unde r no rm al driving
con dit ions. If the filte r cannot clean itse lf (for ex­
amp le, because yo u are only driving sho rt distan ­
ces), th e fi lter becomes clogged with soot and
the
II symbol for the diese l partic ulate filter il­
l uminates
9page 22.
A WARNING
-Do not park your veh icle over flammable
materials such as grass or leaves because
the high temperature of the diesel part icu­
la te filte r could sta rt a fi re.
-
- Do not app ly an underbody protectant in the
exhaust system area or a fire cou ld start.
Selective catalytic
reduction
General information
App lies to vehicles: wit h diese l eng ine
In veh icles with selective catalytic reduction, a
u rea solution (AdBlue) is injected into the ex­
haust system before a nitrogen oxide cata lytic
conve rter to redu ce nitrogen emissions.
195

Checking and Fill in g
Ad Blue is the market ing name for Diese l Exhaust
Fl uid (DEF) .
The AdBlue is carried in a separate tank in the ve ­
h icle. The AdB lue usage acco unts for approxi­
mately 0.5% to 1.2% of the diesel fuel that is
used .
When a message about refil ling the Ad Blue ap­
pea rs in the instrument cluster disp lay, yo u must
refill the AdBlue yourself or have it refilled by an
authorized Aud i dealer or authorized Audi Se rvice
Facility ¢
page 197 .
A WARNING
Failure to heed Ad Blue refill information in
the instrument cluster can prevent the vehicle
from be ing started and driven. If the veh icle
cannot be driven and an emergency arises,
personal in ju ry can occur.
-Always have the Ad Blue tank refilled well before the tank runs d ry.
(D Tips
-
- The instrument cluster display indicates the
distance remaining that can be driven
¢ page 196. If the AdBlue tank is com ­
plete ly empty, the engine w ill not start
again after the ig nition is switched off.
- Ad Blue is required by law to operate this ve­
hi cle.
Messages in the instrument cluster display
Applies to vehicles: with diesel engine
The display indicates if the Ad Blue level is low or
if there is a system malfunction .
Fig. 1 52 In stru ment cl uste r: ind ic a tor in th e disp la y
196
AdBlue level low
You w ill be informed if the Ad B lue in the tan k
drops below a certa in leve l.
Ad Blue /;, Please refill AdB lue . Range
1500 mi (2400 km )
This message appears when there is only enough
AdBl ue left to d rive the distance ind icated in the
drive r information system. Fill the Ad Blue.
AdBlue /9 Refill AdBlue! No restart in
600 mile s (1000 km )! See owner' s manu al
T his message appears when there is only eno ugh
Ad B lue left to drive the distance ind icated in the
dr iver information sys tem. Fill the Ad Blue. Other­
wise the engine w ill not start again if you stop it
once the distance indicated has been driven . As
l ong as the indicator light is on, yo u
can check t he remain ing range in the tr ip com­
p uter*.
Refill Ad Blu e! Engine start not po s­
sible! See owner 's m anual
This message appears w hen the Ad Blue tank is
empty . Fill the Ad Blue. Otherwise you will not be
able to start the eng ine again once you stop it .
The Ad Blue must be refilled when the amount in
the tank has reached the minimum level
¢ page 197, Filling theAdBlue .
¢4 tncorrect filling /system malfuncti on
A message appears if the Ad Blue ta nk was fi lled
with a f lu id other than Ad Blue and the system
has detected that the tank was filled incorrect ly,
or if there is a system malfunction.
AdBlue ./' AdBlue: System fault! No restart in
600 miles (1000 km ). See owner's manual.
This message appears when it is on ly possible to
drive the distance indicated in the driver informa ­
tion system . Drive to the nearest authorized Aud i
dealer or author ized A udi Service Facility to have
the malfunct ion corrected. O therwise the engine
will not sta rt again if you stop it once the dis­
tance indicated has been d riven .
Ad Blue: system fault . Engine start
not possible! See owner 's manual

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This message appears if the system has detected
that the tank was filled incorrectly or that there
is a malfunction. Drive immediately to the near­
est authori zed Aud i dealer or authori zed Audi
Service Facility to have the malfunction correct­
ed . Otherwise you will not be able to start the en­
g in e again once you stop it.
Filling the Ad Blue
Applies to vehicles: with selective catalyt ic red uctio n
A special refill bottle must be used to fill the
AdBlue.
Fig. 153 Right rear vehicle s ide: removing the Ad B lue cap
Fig. 154 Ad Blue filler tube: inserting the refi ll bott le
The Ad Blue tank opening is located near the die­
sel tank opening. Add at least 1 gallon (3.8 lit ­
ers) of AdBlue (two bottles). This is the minimum
amount required to ensure the system detects
the refilling and to start the engine. You can add
a maximum of approximately 4 gallons (15 lit­
ers) .
Opening the filler tube and adding AdBlue
Requirement: the request to add Ad Blue must
appear in the instrument cluster display.
• Park your vehicle on a level surface.
• switch the ignition off .
Checking and Filling
• Open the tank door q page 192.
• Tur n the cap on the tank opening to the left to
remove
q fig. 153.
• Remove the cap from the refill bottle.
• Position the refill bottle on the filler tube and
turn the bottle clockwise until it stops turning
@ qfig. 154.
• Press lightly against the bottom of the bottle
@ to empty it. Con tinue pressing the bottom
of the bottle unti l it is empty or until flu id
stops flowing into the tank.
• Turn the bottle to the left without pressing on
the bottom.
Closing the filler neck
• Turn the Ad Blue cap to the right on the filler
tube until the cap clicks into place.
• Close the tank cover.
After filling
The vehicle must be driven. The system may take
up to two minutes to detect that the AdBlue has
been filled.
• If there was no Ad Blue left in the tank and a
range of
O mi (0 km ) was displayed in the in­
strument cluster, switch the ignition on fo r
about 30 seconds before start ing the engine.
_& WARNING
=
Ad Blue can irritate the skin, eyes and respira-
tory system . If there is contact with the fluid,
flush immediate ly with plenty of water. Con­
sult a physician if necessary.
(D Note
- Only use Ad Blue that conforms to the
standard ISO 22241-1. Do not mix any addi­
tives with the Ad Blue and do not dilute it
with water.
- Do not add AdBlue to the diese l tank or add
diesel fuel to the Ad B lue tank. Mixing can
lead to damage to the engine and the Ad Bl­
ue tank system. Warranty does not cover
damage caused by this .
- Ad Blue attacks surfaces such as painted ve­
hicle components, plastic and carpet. Re-
move the fluid as quickly as possible with a ..,.
197

Checking and F ill in g
damp cloth and plenty of cold water. If the
AdB lue has already crysta llized, use warm
water and a sponge. AdBl ue res idue that is
not removed will crysta lli ze and can damage
the affected s urface.
- Do not store the ref ill bottle in the vehicle.
If it leaks, the escaping Ad Blue cou ld dam­
age the veh icle inter ior.
- Do not allow Ad Blue to come into contact
with clothing. If there is contact with the
flu id, flush immed iate ly w ith plenty of wa­
ter .
@ Tips
-You can obtain refill bott les from an author­
i zed Audi dealer or authorized Audi Service
Facility .
- Follow the Ad Blue manufacturer 's instruc­
tions for use and storage .
Engine compartment
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
c h ecking and filling fluid s, there i s a risk of in ­
jury, scalding , accid ents, and burns. F or thi s
rea son, follow all the following li sted warning s
and general safety precautions. The engine
c ompartment is a dangerous area!
~ &
A WARNING
To reduce the risk of injur ies, complete the
following steps before opening the hood :
- Turn the eng ine off.
- switch the ignit ion off .
- Set the parking b rake.
- Pla ce the sele ctor leve r in the P pos ition.
- Let the engine coo l down .
- Never open the hood when you see that
steam o r coolan t drips from the engine
compartment- there is a da nger of burns!
Wait un til no steam o r coolant flows ou t.
- Keep children away from the engine com­
partm ent.
198
-
- Never sp ill fluids on a hot engine . These fl u­
ids (such as the freeze protection conta ined
in the coolant) can catch fire.
- Avoid short circ uits in the e lectrica l system,
especially the battery.
- When working in the engine compa rtment,
remember that the radiator fan can switch
on even if the ignition is switched off, wh ich
increases the risk of pe rsonal injury.
- Never open the cap on the coolant expan­
si on tank when the engine is warm . The
cooli ng system is under p ress ure .
- To protect yo ur face, hands, and a rms from
hot steam or coolant, cover the cap with a large cloth when o pening.
- Do not remove the engine c over under any
circumstances . T his i ncreases the r isk of
burns.
- If tests need to be per formed with t he en­
gine running, there is additional danger due
to mov ing components (such as the rib bed
be lt , a lternator a nd radiator fan) a nd from
the high v olt age ignit io n sy stem.
-Never reac h into the radiato r fan . The e lec­
tric aux iliar y fan i s controlled by tempera­
ture and can swi tch on sudden ly.
- Pay attention to t he fo llow ing warnings list­
ed when w ork on the fue l system o r on the
elec tric al equipmen t is requ ired .
- Always d isconnect the vehicle battery
from the vehicle electrical system
- Do not smo ke
- Never work near open flames
- Always have a work ing fire exting uis her
near by
- To reduce t he risk of e le ct ric shock and in­
jury, never touch the following components
when t he engine is running or is bein g start­
e d :
- Ign ition cable
- Other components in the electronic h igh
vo ltage ignition system
- If you must check or perform work o n the
e ngine whi le it is running:
- S et t he parki ng bra ke and pla ce the selec­
t or lever in the P (park) posi tion first .

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-Always proceed with extreme caution so
that clothing, jewelry or long hair do not
become caught in the radia tor fan, fan
belt or other moving components or do not come into contact with hot compo­
nents . T ie back long hair before beg inning
work and do no t wear cloth ing that can
hang down into the eng ine.
- limit your exposure to exhaust and chemi­
cals to as short a time as possible
q ,& .
..&, WARNING
California Propos ition 65 Warning:
- Engine exhaust, some of its constituents,
and certai n veh icle components conta in or
em it chemicals known to the State of Cali­
forn ia to cause cancer and birth defec ts and
reproductive harm. In addition, certai n flu ­
ids contained in vehicles and certain prod­
ucts of component wear contain or emit
chemicals known to the State of California
t o cause cancer and birth defects or other
reproductive harm .
- Battery posts , terminals and related acces­
sories contain lead and lead compounds,
chem icals known to the State of California
to cause cancer and reproductive harms .
Wash hands after hand ling.
(D Note
When filli ng flu ids, be sure not to m ix the flu­
ids up . Otherwise seve re malfunctions and en ­
gine damage w ill occur .
@ For the sake of the environment
You should regu larly check the grou nd under
your veh icle in order to detect leaks quickly . If
there are visible spots from oil or other f luids,
b ring yo ur vehicle to an autho rized Aud i dea l­
er or authori zed Audi Se rv ice F acili ty to be
checked.
Ch eck in g and Fillin g
Opening the hood
The hood is released from the in terior .
Fig . 155 Se ctio n from t he dr iver' s footwe ll: re le a se le ve r
Fig . 156 Ro cke r swit c h un der t he hoo d
Make sure the wiper arms a re not raised up from
the windsh ie ld . Oth erwise the paint cou ld be
damaged.
.,. W ith the driver's door open, pull the lever be­
low the instr ument pane l in the d irect ion of the
arrow
<=> fig. 155.
.,. Raise the hood slightly r:!> ff::.. .
.,. Press the rocker switch unde r the hood upward
q fig. 156 . This re leases the catch .
.,. Open the hood .
..&, WARNING
-=
Never open the hood when you see that steam
or coolant drips from the engine compart­
ment- there is a da nger of bu rns! Wait unt il
n o steam or coolant flows out .
- Never open the hood when you see that
s team or coo lant dr ips from the e ngine
comp artment- the re is a dange r of burns !
Wait until no steam or coo lant flows o ut .
199

Checking and Fill in g
Closing the hood
.. Push the hood down until the force of the strut
is overcome.
.. Let the hood fall light ly into the Latch.
Do not
press it in.
c::> _&. .
A WARNING
If the hood is not latched completely, it cou ld
fly up while you are driving and obstruct your
vision.
Gasoline engine compartment overview
The most important check points .
-For safety reasons, the hood must always be
closed securely wh ile d riving. Because of
this, always check the hood after closing it
to make sure it is Latched correctly . The
hood is Latched if the front corne rs cannot
be Lifted.
- If you notice that the hood is not Latched while you are dr iving, stop immediately and
close it, because this increases the risk of an
accident.
F ig . 1 57 Typica l locat io n of th e reservo ir, eng ine oil dipstick, a nd engine o il filler opening
(D Coolant expansion tank (_L) .....
@
@
©
®
®
0
®
Eng ine oil dipstick ......... ... .
E ng ine oil filler opening
("!:::r.) .. .
Brake fluid reservoir((())) ...... .
Ba ttery(+) under a cover
Body ground point(-)
Washer fluid reservoir
(W) ... .. .
Fu se housing ... ......... .... .
200
206
203
203
207
209
212
248
The engine oil filler opening and the dipstick
( items @and
@) c::> fig. 157 may be Located in a
different area depending on engine vers io n.
A WARNING -
Read and following the WARNINGS before
checking anyth ing in the eng ine compartment
c::> pag e 198.

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Checking and Filling
Diesel engine compartment overview
The most important check points .
Fig. 158 Typical locat ion of the reservoi r, eng ine oil dipstick, and engine o il filler opening
CD Coolant expansion tank (-L) .....
@
®
©
®
®
(J)
®
Engine oil dipstick ... ...... ... .
Engine oil filler opening (~) .. .
Brake fluid reservoir
(0))
Battery(+) under a cover
Body ground point(-)
Washer fluid reservoir
(O) ..... .
Fuse housing .......... ...... .
206
203
203 207
209
212
248
The engine oil filler opening and the dipstick
(items ® and @)¢
fig . 158 may be located in a
d ifferent area depending on engine version.
A WARNING
-
Read and following the WARNINGS before
checking anything in the engine compartment
¢page 198.
Engine oil
Engine oil specifications
The engine oil used must conform to exact speci­
fications.
T he service interval display in the instrument
cluster of your vehicle will inform you when it is
time for an oi l change. We recommend that you
have your oil changed by an authorized Audi Serv­
ice Advisor.
If you have to top off the oil between o il changes,
use the Audi oil qua lity standard specified in the
table .
Audi oil quality standard
Gasoline
VW 502 00 or
engine vw 504 00
Diesel VW 507 00
engine
201

Checking and F ill in g
Using the proper engine o il is important for the
functionality and service life of the engine. Your
engine was factory-fi lled w ith a high-quality o il
which can usually be used throughout the ent ire
year.
@) Note
Your L imited New Vehicle Warranty does not
cover damage or malfunctions due to failure
to follow recommended ma intenance and use
requ irements as set forth in the Audi Ow ne r's
Manual and Wa rranty
& Ma intenance booklet .
- Use only a high quality eng ine oil t hat ex-
pressly comp lies w ith the Audi o il quality
standard specified for your vehicle's e ngine .
Using a ny other oil can cause se rious engine
damage.
- Do not mix any lubricants o r othe r addit ives
i nto the engine oil. Doing so can cause en ­
g ine damage.
(D Tips
If you need to add oil and there is none availa­
ble that meets the Audi o il quality standard
y o ur eng ine requires, you m ay add a total of
no more than 0.5 quart/li ter o f a h igh-quali ty
"synthet ic"oil that meets the fo llowing speci ­
fications .
- V ehicles wi th gasoline engine: AC EA A3 o r
API SM with a viscosity grade of SAE 0W- 30,
SAE SW -30 or SAE SW-40 .
- Vehicles with d iesel engine: ACEA C3 o r
API CF with a viscosity g rade of SAE 0W-30
or SAE SW-30.
- Fo r more information abo ut engine oi l t h at
has been approved for your vehicle, please
contact either your a uthorized Audi dea ler
or Audi Customer Relations at
1 (800) 822-2834 or visit ou r web site at
www.aud iusa.com or www .aud icanada .ca.
Engine oil consumption
The engine in your vehicle depends on an ade­
quate amount of oil to lubricate and cool all of
its moving parts .
In order to provide effective lubrication and cool­ ing of in ternal engine components, all internal
202
combust ion engines consume a certa in amoun t
of oil. Oil consumptio n varies from engine to en­
gine and may change sign ificant ly over the li fe of
the engine . Typically, eng ines with a specif ied
break-in period (see
¢ page 70) consume more
o il dur ing the break-in per iod than they consume
after oil consumption has s tabilized .
Under normal cond itions, the rate of oil con­
sump tion depends on the quality and viscos ity of
the oil, the RPM (revolutions per minute) at
wh ich the engine is operated, the ambie nt tem­
perature and road cond it ions . Furthe r facto rs a re
t h e amo unt of o il di lution from water conde nsa­
t ion or fue l residue and the ox idat ion leve l o f the
o il. As any engine is s ubject to wear as mileage
builds up, the oil consumption may increase ove r
time unt il rep lacement of wo rn components may
become necessary.
With a ll these va riab les coming into p lay, no
standard rate of oil consumption can be estab ­
li shed or spec ified. There is no alte rnative to reg­
ul ar and frequent checking o f the oil leve l, see
Note .
If the yellow engine oi l level warning sym bo l Ill
in the instrument cluster lights up, yo u should
check the o il level as soon as possible
¢ page 203. Top off the oil at your earliest con­
venience
¢ page 203.
A WARNING
Before you c heck anythi ng in the eng ine com ­
partment, always read and heed al l WAR N­
IN GS ¢page 198.
(D Note
Driving w it h an insufficient o il level is likely to
cause severe damage to the engine.
(D Tips
- The oil pressure warning d isplay. is not
an indicator of the oil level. Do not rely on
it. Instead, check th e oil level in your en­
gine at regular intervals, preferably each
time you refuel , and alway s before going
on a long trip.