2018 AUDI S4 catalytic converter

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Checking and Filling
Gasoline
Fuel supply
Applies to: veh icles with gaso line engine
Using the right fuel helps keep the environment
clean and prevents engine damage .
Fuel recommendation
The fuel recommended for your vehicle is unlead­
ed premium
grade gasoline. Audi recommends
using TOP TIER Detergent Gasoline with a mini­
mum octane rating of 91 AKI (95 RON). For more
information on TOP TIER Detergent Gasoline,
p lease go to the official website
(www.toptiergas .com) .
The recommended gasoline octane rating for
your engine can also be found on a label located
on the inside of the fuel filler flap . This rating
may be specified as AKI or RON.
Your vehicle may also be operated using unlead­
ed regular gasoline with a min imum octane rat ­
ing of 87 AKl/91 RON. However, using 87 AKl/91
RON octane fuel will slightly reduce engine pe r­
formance.
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 un leaded gasol ine may not be available.
For more information on refueling your vehicle,
see
c::> page 317 .
Octane rating
Octane rating indicates a gasoline's ability to re­
sist engine damaging "knock" caused by prema­
ture ignit ion and detonation . Therefore , buy ing
the correct grade of gasoline is very important to
h e lp prevent possible engine damage and a loss
of eng ine performance.
Gasoline most commonly used in the United
States and Canada has the following octane rat­
ings that can usually be found on the filler pump:
- Premium Grade: 91
-96 AKI
Checking and Filling
-Regu lar Grade: 87 -90 AKI
E xplanation of the abb reviations:
AKI =
Anti Knock Index = (R +M)/2 = (RON +MON)/
2
RON = R esearch Octane Number
MON = Motor Octane Number.
(D Note
- Do not use any fuel w ith octane ratings low­
er than 87 AKI or 91 RON otherwise expen­
sive engine damage w ill occur .
- Do
not us e leaded gasoline. The use of lead­
ed gasoline will severe ly damage your vehi­
cle'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 al­
cohol or MTB E (commonly referred to as oxygen ­
ates) 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% metha-
nol.
- Blend must contain more than 2% co-solvents.
Blend of gasoline and ethanol (grain alcohol or
ethyl alcohol)
- Anti-knock index must be 87 AKI or higher.
- Blend must not conta in more than 15% etha-
nol.
Blend of gasoline and MTBE
- Anti-knock 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 es­
pecially well for winter or summer dr iving . Dur-
ing seasonal change-over, we suggest that you
..,.
315

any circumstances. Immediately contact the
nearest authorized Audi dealer or author­
ized Audi Service Facility for assistance.
These fuels contain substances that can se­
verely damage the fuel system and the en­
gine if the engine is started.
Refueling
Fuel filler neck
The fuel filler neck is located on the right rear
side panel behind the fuel filler flap.
If the power locking system should fail, you can
still open the flap manually
-for detailed instruc­
tions see
¢page 319.
You can find the fuel tank capacity of your vehicle
in
¢page 381.
The label on the inside of the fuel filler flap tells
you the correct fuel for your vehicle. For more in­
formation about fuel specifications, see
<=?page 315.
Your veh icle fuel tank has an onboard refuelling
vapor recovery system. This feature he lps to pre­
vent fuel vapors from escap ing from the tank and
polluting the environment while you refuel your
vehicle . In order to fill the tank properly while
protecting the environment, please follow this
refueling procedure carefully.
A WARNING
Under normal operating conditions, never car­
ry additional fuel containers in your car. Gas
canisters and other containers used to trans­
port fuel can be dangerous. Such containers,
full or empty, may leak and could cause a fire
in a collision. If you must transport fuel to
use for your lawn mower, snow blower, etc.,
be very careful and always observe local and
state laws regarding the use, transportation
and storage of such fuel containers. Make cer­
tain the container meets industry standards
(ANSI/ASTM F8S2
-86).
(D Note
Never dr ive your vehicle until the fuel tank is
completely empty. The irregu lar supply of
Checking and Filling
fuel can cause misfiring. Gasoline could enter
the exhaust system and damage the catalytic
converter.
Fueling procedure
Fig. 260 Right rear side of the vehicle: opening the fuel
f ilte r door
Fig. 261 Fuel filler door with attached fuel cap
The fuel filler door is unlocked or locked by the
central locking system.
Opening the fuel cap
.,. Press the left side of the fuel filler door to open
it¢
fig. 260 -arrow-.
.,. Unscrew the tank cap counterclockwise.
.,. Place the cap from above on the open fuel filler
door¢
fig. 261.
Closing the fuel cap
.,. Turn the fuel cap to the right until it stops.
.,. Close the fuel filler door until it latches.
Once the pump nozzle switches off, the fuel tank
is "full". Do not fill the tank more. Otherwise 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
.,.
317

Checking and Filling
filler door. For additional information on fuel,
see
<=> page 315.
The fuel tank capacity of your vehicle is listed in
the
Technical Data section <=> page 381.
To avoid fuel spilling or evaporating from the fuel
tank always close fuel cap properly and com­
pletely . An improperly closed fuel filler cap may
also cause the MIL lamp
<=>page 24 to come on.
A WARNING
Not paying attention when fueling or han­
dling fuel incorrectly can lead to fires, explo­
sions or serious injuries.
- Fuel ignites easily and can cause serious
burns and other injuries .
- If you do not switch the engine off when fu­
eling and/or do not insert the fuel nozzle
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 electric­
ity before touching the fuel nozzle . Static
electricity can create sparks, which can ig­
nite vapors when fueling.
- Do not smoke or have an open flame in the
area when fueling your vehicle or filling a
fuel container because this increases the
risk of an explosion .
-For your safety , carrying fuel containers in
your vehicle is not recommended. Whether
full or empty, the container can leak and
cause a fire in the event of an accident.
-If you must make an exception and trans­
port a fuel container, note the following:
- Never fill the fuel container with fuel
while it is in or on the vehicle . Stat ic elec ­
tricity is discharged when filling which can
cause the fuel vapors to ignite and in­
creases the risk of an explosion.
- Always place a fuel container on the
ground before filling.
318
-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 contact with
the container when filling it with fuel. This
prevents static electricity from discharg­
ing .
-Never spill fuel in the vehicle or the lug­
gage compartment . Evaporated fuel is ex­
plosive and increases the risk of serious in­
jury or death .
- Follow legal requirements when using, storing and transporting fuel containers .
-Make sure the fuel container conforms to
industry standards (ANSI/ASTM F8S2 -86).
{(D Note
- Remove spilled fuel from vehicle paint im­
mediately, because it can damage paint.
- Never drive until the fuel tank is completely
empty. The irregular supply of fuel that re­
sults from that can cause engine misfires.
Uncombusted fuel will enter the exhaust
system and increase the risk of damage to
the catalytic converter.
- If the fuel tank runs completely empty in a
vehicle with a
diesel engine, the ignition
must remain switched on for at least 30
seconds after refueling before starting the
engine.
It may take longer than usual for
the engine to start, even up to a minute.
This is because the air must first bleed out
of the fuel system when starting the engine.
@ For the sake of the environment
Do not overfill the fuel tank, otherwise fuel
can leak out when the vehicle is warming up.
@ Tips
Diesel vehicles are equipped with a diesel mis­
fueling guard.
It allows the vehicle to be fu­
eled only with a diesel fuel pump nozzle. A
worn or damaged nozzle or a nozzle that is
too small may not be able to open the diesel
misfueling guard. If this is the case, try turn­
ing the nozzle before inserting it in the fuel
filler neck, use a different fuel pump, or see
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an authorized Audi dealer or authorized Audi
Service Facility for assistance.
Fuel filler door emergency release
If the central locking system is faulty, the fuel
filler door can be unlocked manually.
Fig. 262 Luggage co mpartment: opening the side trim
panel
Fig . 263 Luggage compartment: fuel filler door e merge ncy
r elease
The emergency opening mechanism is located
behind the right side trim panel in the luggage
compartment.
... Open the cover in the side panel ¢fig. 262.
... Loosen the loop c;, fig. 263 from the retainer
and then pull on the loop carefully
¢(D . The
filler door is released .
... Press on the left side of the fuel filler door to
open it
¢ page 317, fig. 260.
(D Note
Only pull on the loop until you feel resistance.
You will not hear it release . Otherwise you
could damage the emergency release mecha­
nism.
Checking and Filling
Selective catalytic
reduction (AdBlue/DEF)
General information
Applies to: vehicles with selec tive catalytic reduction
In vehicles with selective catalytic reduction, a
urea solution (AdBlue/DEF) is injected into the
exhaust system in front of a nitrogen oxide cata­
lytic converter to reduce nitrogen emissions. The
urea solution is known as Ad Blue or DEF (Diesel
Exhaust Fluid). The information that follows w ill
use the name AdBlue.
The Ad Blue is carried in a separate tank in the ve­
hicle. The AdBlue usage accounts for approxi­
mately 1.0% to 4 .0% of the diesel fuel that is
used .
When a message about refilling the AdBlue ap­
pears in the instrument cluster display, you must
refill the AdBlue yourself or have it refilled by an
authorized Audi dealer or authorized Audi Service
Facility
c;, page 320 .
{D Tips
-The display indicates the distance remaining
that can be dr iven
c;, page 319. If the Ad Bl­
ue tank is completely empty, the engine will
not start again after the ignition is switched
off.
-Ad Blue is required by law to operate this ve­
hicle.
Messages in the instrument cluster display
Appl ies to: vehicles wi th selective catalytic reduction
The display indicates if the Ad Blue level is low or
if there is a system malfunction.
AdBlue level low
You will be informed in the instrument cluster
display if the AdBlue in the tank drops below a
certain level. Add at a minimum the amount of
AdBlue shown in the message:
II Refill with at least x qt (l) Ad Blue. Range
x mi (km )
319

Check ing and F illing
"' Position the bottle on the filler tube and turn
the bottle clockwise unti l it stops turning.
"' Press lightly aga inst the bottom of the bott le
to empty it. Continue pressing the bottom of
the bottle until it is empty or unti l fluid stops
flowing into the tank .
"' Remove the bottle and seal the filler neck
¢ page 322, Completing AdBlue refill .
0 Note
Only use refill bottles that are approved for
your vehicle. Us ing other systems can ca use
Ad Blue to leak.
-You can obta in refill bottles from an author­
i zed Audi dealer or authorized A udi Service
F ac ility.
- A pe rm itted refill bottle conta ins approxi­
mately 0 .5 gallon ( 1.9 liters) of Ad Blue.
Completing AdBlue refill
Applies to: vehicles with selective catalytic reduction
Closing the filler neck
"'Turn the Ad Blue cap to the r ight on the filler
tube unti l th e cap cl ic k s into
p lace ¢.&. in
Prepara tion on page 320,
¢ (Din Preparation
on page 320 ..
"' Then press on the left side of the tank door un-
ti l it latches.
After filling
The vehicle must be driven so tha t the system
recognizes t hat the Ad B lue was refilled. This can
t ake severa l m in utes.
"' If there was no Ad Blue left in the tank and a
r ange of O mi (0 km) was shown in the d isplay,
swi tch the ign ition on fo r abo ut 30 seconds be­
f ore star ting the engine .
(D Tips
Ad Blue in the tank can free ze at very low tem­
pera tures. If this happens, the system will
not detect that the AdB lue was refilled and it
w ill contin ue to inform you of the low AdBlue
322
leve l. The message tu rns off as soon as the
tank thaws out again .
Emissions control
systems
Cat alytic converter
Applies to: vehicles with gasoline engines
T he vehicle may only be driven w ith un leaded
gaso line, otherwise the catalytic converter will be
destroyed .
Never drive unti l the tan k is comp lete ly empty .
T he irregu lar supply of fuel that resu lts from that
can cause eng ine misfires. Uncombusted fuel will
enter the exhaust system , which can cause over­
heating and damage to the catalytic converte r.
Di esel particulate filt er
Applies to: vehicles with diesel engines
The diese l particulate filter filters nearly all of
the soot part icles out of the exhaust. The filter
cleans itself automat ica lly under norma l dr iv ing
cond it io ns. If the filter cannot clean itself (for ex­
amp le, because yo u are on ly driving short distan ­
ces), the filter becomes clogged with soot and
the
1111 i ndicato r light for the diese l particulate
filte r tu rns
on ¢ page 33.
_&. WARNING
The tempera ture o f the e xhaust sys tem is
h igh, both when driving and a fter stopping
the engine.
-
-Never tou ch the e xhaus t tail p ipes o nce they
have become hot. This cou ld resu lt in burns.
-D o not p ark your vehicle over flamm able
materials such as grass or leaves because
the hig h temperature of the emissions con­
trol system (catalyt ic converter or d iese l
pa rticu late filter) co uld start a fire.
- Do not apply underbody protectant in the
exhaust system area, beca use this increases
the risk of f ire.

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(D Note
Driving with an insufficient oil level is likely to
cause severe damage to the engine.
@ Tips
-The oil pressure warning display. is not
an indicator of the oil level. Do not rely on
it. Instead, check the oil level in your en­
gine at regular intervals, preferably each
time you refuel, and always before going
on a long trip.
-If you have the impression your engine con­
sumes excessive amounts of oil, we recom­
mend that you consult an authorized 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. An authorized Audi dealer has instruc­
tions about how to measure oil consump­
tion accurately.
Checking the engine oil level and adding
engine oil
The engine oil level can be checked in the Info ­
tainment system
Fig. 269 Engine compa rtment: eng ine oil filler opening
cove r
Checking the engine oil level
- Park the vehicle on a level surface.
- Shut the engine off when it is warm.
0 N
-N
" 00 IX)
-Switch only the ignition back on. Wait approxi-
mately two minutes so that the engine oil can
flow back into the oil pan .
Checking and Filling
- Select in the Infotainment system: the !MENUI
button > Vehicle > left control button > Service
& checks > Oil level.
-Check the oil level in the Infotainment system
display. Add engine oil if the bar in the oil level
indicator is just before "min".
Adding engine oil Follow the safety precautions
~&. in Working in
the engine compartment on page 323.
- Stop the engine and open the hood
~page 324 .
-Unscrew the cap~ on the engine oil filling
opening
~ fig. 269, Qpage 325.
- Carefully add O .S quart (O .S liter) of the correct
oil
~ page 325.
- Close the engine oil filler opening cap.
- Close the hood, restart the ignition after two
minutes and read the current oil level in the In ­
fotainment system.
A WARNING ...__ --When adding oil, do not let oil drip onto hot
engine components. This increases the risk
of afire.
-You must secure the cap on the oil filler
opening correctly so that oil does not leak
out onto the hot engine and exhaust system
when the engine is running, because this is
a fire hazard.
-Always clean skin thoroughly if it comes into
contact with engine oil.
0 Note
- The engine oil level must not be under the
"min" marking, because this increases the
risk of engine damage.
- If the message II Please reduce oil level
appears, there is too much oil in the engine
and there is a risk of damaging the catalytic
converter and engine. Do not start the en­
gine. Contact an authorized Audi dealer or
authorized Audi Service Facility to have ex­
cess engine oil extracted if necessary.
- Do not mix any additional lubricants into
the engine oil. Damage caused by such addi-
tives is not covered by the warranty.
IJJ>
327

Index
Menu language
refer to Setting the language 248
Menus/symbols . . . . . . . . . . . . . . . . . . . . . . 165
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Mirrors Adjusting exterior mirrors . . . . . . . . . . . . . . 58
Compass ... .... ................ ..... 63
Dimming .................... ........ 59
Vanity mirror . . . . . . . . . . . . . . . . . . . . . . . . 60
MMI
refer to Multi Media Interface . . . . . . . . . . 155
MMI search
refer to Free text search . . . . . . . . . . 164, 238
MMI touch . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
MODE button . . . . . . . . . . . . . . . . . . . . . . . . . 16
Monitor ing the Advanced Airbag System 283
MP3
refer to Jukebox . . . . . . . . . . . . . . . . . . . . . 229
Multifunction steering wheel
Changing views . . . . . . . . . . . . . . . . . . . . . . 13
Operating . . . . . . . . . . . . . . . . . . . . . . . . 13, 16
Switching tabs . . . . . . . . . . . . . . . . . . . . 13, 16
Voice recognition system . . . . . . . . . . . . . . 15
Multi Media Interface . . . . . . . . . . . . . . . . . . 155
Music collection
refer to Jukebox . . . . . . . . . . . . . . . . . . . . . 229
Mute
refer to Muting . . . . . . . . . . . . . . . . . . . . . . 252
Muting ... ..... .................. .... 252
myAudi . . . . . . . . . . . . . . . . . . . . . . . . . 188, 208
Logging in in the vehicle . . . . . . . . . . . . . . 188
PIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
N
Natural leather care/cleaning . . . . . . . . . . . 357
NAV/MAP button . . . . . . . . . . . . . . . . . . . . . 204
Navigating (instrument cluster) . . . . . . . 21, 22
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Announcements . . . . . . . . . . . . . . . . . . . . . 213
Better route . . . . . . . . . . . . . . . . . . . . . . . . 220
Driver information system . . . . . . . . . . . . . . 23
also refer to Map . . . . . . . . . . . . . . . . . . . . 214
Navigation (instrument cluster) . . . . . . . . . . 21
Net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Network connection (W i-F i) . . . . . . . . . . . . . 194
394
NH TSA
Contacting
N itrogen oxide (NOx) catalytic converter 261
refer to Ad
Blue. .. .. .. ............... 319
Number of seats . . . . . . . . . . . . . . . . . . . . . . 263
0
Occupant protection . . . . . . . . . . . . . . . . . . . 120
Occupant seating positions . . . . . . . . . . . . . 255
Octane rating ........................ 315
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Offroad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Offroad mode . . . . . . . . . . . . . . . . . . . . . . . . 147
OFF (button) . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Oil
refer to Engine oil . . . . . . . . . . . . . . . 325, 327
On-board computer . . . . . . . . . . . . . . . . . . . . 17
On-Board Diagnostic System (OBD) Data Link Connector (DLC) . . . . . . . . . . . . . . 25
E lectronic speed limiter . . . . . . . . . . . . . . . 102
Malfunction indicator lamp (MIL) . . . . . . . . 24
On/Off knob (MMI) . . . . . . . . . . . . . . . . . . . . 155
Online destinations
refer to Point of interest search . . . . . . . . 208
Online map . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Online map update . ................... 218
Online media . . . . . . . . . . . . . . . . . . . . . . . . . 232
Online roadside assistance Audi connect emergency call and service 203
Online serv ices
refer to Aud i connect ( Infotainment) . . . . 188
Opening...... .... .... ..... .... ....... 37
Fuelfillerdoor ...................... 317
Operating Multifunction steering wheel . . . . . . . . 13, 16
Multi Media Interface . . . . . . . . . . . . . . . . 157
Voice recogn ition system . . . . . . . . . . . . . 168
Options menu ... .. .. .. ........ 14, 157, 161
Other consumers . . . . . . . . . . . . . . . . . . . . . . 18
Outside temperatu re display . . . . . . . . . . . . . 10
Overv iew (Cockp it) . . . . . . . . . . . . . . . . . . . . . . 8
p
Paint damage
Paint number 356
379