2020 AUDI A8 catalytic converter

Checking and Filling

Checking and Filling
Fuel
Types of gasoline
The correct gasoline grade is stated on the inside
of the fuel filler door.
The vehicle is equipped with a catalytic converter
and must only be driven with unleaded gasoline.
Audi recommends using TOP TIER Detergent Gas-
oline. For additional information on TOP TIER De-
tergent Gasoline, visit www.toptiergas.com.
The individual gasoline grades are differentiated
by octane ratings. This value is given with (R
+M)/2 equating to AKI or in RON.
The headings below match the sticker in the fuel
filler door (examples):
UNLEADED FUEL ONLY MIN. (R+M)/2 87
Regular / MIN. RON 91 Regular
Use regular gasoline with minimum 87 AKI /
91 RON > ©.
Audi recommends using premium gasoline with
minimum 91 AKI / 95 RON to achieve the rated
horsepower and torque.
UNLEADED FUEL ONLY PREMIUM MIN. (R
+M)/2 91 / SUPER MIN. RON 95
Using premium gasoline with minimum 91 AKI /
95 RON is recommended.
If premium gasoline is not available, you can also
use regular gasoline 87 AKI / 91 RON. However
this does reduce the engine power slightly.
() Note
— Filling the tank just one time with leaded
fuel or other metallic additives will cause
permanent deterioration to the catalytic
converter function.
— When gasoline with an octane rating that is
too low is used, high speeds or heavy engine
load can lead to engine damage.
270
G) Tips
The vehicle may be filled with fuel that has a
higher octane rating than what is required by
the engine.
Gasoline mixture
Gasoline with alcohol or MTBE (Methyl-Tert-
Butyl-Ether)
You can use unleaded gasoline mixed with alco-
hol or MTBE (generally labeled as oxygenated
compounds) as long as the fuel meets the follow-
ing conditions:
Gasoline with methanol content (methyl alco-
hol
or methanol)
— Anti-Knock Index is at least 87 AKI
—No more than 3% methanol
— More than 2% solvent
Gasoline with ethanol content (ethyl alcohol or
ethanol)
— Anti-Knock Index is at least 87 AKI
—No more than 15% ethanol
Gasoline with MTBE content
— Anti-Knock Index is at least 87 AKI
—No more than 15% MTBE
Gasoline adapted to the season
Many gasoline fuels are adapted to the seasons.
When the season changes, we recommend refu-
eling at high-traffic gas stations. It is more likely
that the gasoline will be suitable for the season
there.
() Note
— Gasoline with methanol content that does
not meet the specified conditions may cause
corrosion damage and damage to plastic or
rubber components in the fuel system.
— Do not use gasoline that does not meet the
specifications.
— If you are unable to find out if a specific gas-
oline mixture meets the specifications, ask
the gas station operator or their fuel suppli-
er.

Checking and Filling



— When using fuel containers made of met- — You must vent the tank system again if you
al, the fuel pump nozzle must always re- press on the fuel filler door opener. The fuel
main in contact with the container to re- pump nozzle can stay in the fuel filler neck
duce the risk of static charge. when doing this. Vent the tank system by
— Insert the fuel pump nozzle as far as pos- pulling the E) switch in the driver's door
sible into the filler opening while refuel- again.
ing. — If the engine turned off because the fuel
— Follow the applicable legal regulations in level was too low, then you may need to re-
the country where you are driving when fuel with up to 4.0 gallons (15 liters) of fuel
using, storing and transporting fuel con- in order for the vehicle to detect the new
tainers. fuel level. Otherwise, the engine may not
— Make sure that the fuel container meets restart.
the industry standards, for example ANSI — Fuel can age and may lead to problems
or ASTM F852-86. when starting. Audi recommends replacing

4N0012721BD
the fuel in your vehicle within six months.
@) Note
— Remove fuel that has overflowed onto any Fuel filler door emergency release
vehicle components immediately to reduce Applies to: vehicles with manual fuel filler door release
the risk of damage to the vehicle. If the central locking system malfunctions, the
— Never drive until the fuel tank is completely fuel filler door can be unlocked manually.
empty. The irregular supply of fuel that re-
sults from that can cause engine misfires.
Uncombusted fuel may enter the exhaust
system and increase the risk of damage to
the catalytic converter.

@ For the sake of the environment
— Do not overfill the fuel tank, or fuel could
leak out when the vehicle is warming up.
— Fuel should never enter the sewer system or
come into contact with the ground.
@ Tips
The fuel filler door on your vehicle does not
lock if you lock the vehicle from the inside us-
ing
the central locking switch.
G@) Tips
Applies to: vehicles with plug-in hybrid drive


Fig. 179 Right cover in the luggage compartment: remov-
ing the cover
— When inserting the fuel pump nozzle, make
sure that you do not press on the fuel filler
door opener @) with the fuel pump nozzle.



Fig. 180 Luggage compartment: fuel filler door emergency
release
See the label in the fuel filler door @)
> fig. 178. Otherwise, a valve will close in The emergency opening mechanism is located
the fuel filler neck and fueling will stop even behind the right cover in the luggage compart-
if the tank is not full. ment.
273

Checking and Filling

> Remove the screwdriver from the vehicle tool
kit > page 316.
> Carefully insert the flat side of the screwdriver
from below into the center of the top slot in the
cover > fig. 179.
> Use the screwdriver to pull the cover toward the
center of the vehicle and remove the cover.
> To unlock the fuel filler door, loosen the red
loop from the retainer and then pull on the
loop carefully > fig. 1802 ©.
> Press on the left side of the fuel filler door to
open it > page 271, fig. 177.
@ Note
Only pull on the loop until you feel resistance.
You
will not hear it release. If you continue to
pull, you could damage the emergency re-
lease mechanism.
@ Tips
Applies to: vehicles with plug-in hybrid drive
— The tank will not be vented if the emergency
release function was used on the fuel filler
door. You can only fill a small amount of
fuel in the tank. Fill only until the fuel pump
nozzle turns off for the first time. Drive to
an authorized Audi dealer or authorized
Audi Service Facility immediately to have
the malfunction corrected.
— Pressure can escape if you open the tank cap
after using the emergency release. This can
create noises.
Emissions control
system
General information
Z\ 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.



1) Depending on the engine and country
274

— Do not park your vehicle over flammable
materials such as grass or leaves because
the high temperature of the emissions sys-
tem could start a fire.
— Do not apply underbody protectant in the
exhaust system area, because this increases
the risk of fire.
Catalytic converter
Follow the safety precautions > page 274, Gener-
al information.


The vehicle may only be driven with unleaded
gasoline, or the catalytic converter will be de-
stroyed.
Never drive until the tank is completely empty.
The irregular supply of fuel that results from that
can cause engine misfires. Uncombusted fuel
could enter the exhaust system, which could
cause overheating and damage to the catalytic
converter.
Malfunction Indicator Lamp (MIL)
If the [J indicator light blinks or turns on, there
is a malfunction that is causing poor emissions
quality and that could damage the catalytic con-
verter. Drive slowly to an authorized Audi dealer
or authorized Audi Service Facility to have the
malfunction corrected.
The indicator light can also turn on if the fuel fill-
er cap is not closed correctly page 271).
Engine compartment
General information
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 in-
jury, scalding, accidents, and burns. For this
reason, follow all the warnings and general >

Checking and Filling

dealer or authorized Audi Service Facility. Have
the oil changed by an authorized Audi dealer or
authorized Service Facility.

Audi recommends
Slastrol) (ZDIGE Prorzssional
Audi recommends using the LongLife high-per-
formance engine oil from Audi Genuine Parts.
WEE Tel
Engine oil pressure


=] Turn off engine. Oil pressure too low
Stop driving and switch the engine off. Check the
engine oil level > page 278.
— If the engine oil level is too low, add engine oil
=> page 279. Only continue driving once the in-
dicator light turns off.
— If the engine oil level is correct and the indica-
tor light still turns on, turn the engine off and
do not continue driving. See an authorized Audi
dealer or authorized Audi Service Facility for as-
sistance.
Engine oil level
= Please add oil immediately
Stop driving and switch the engine off. Check the
engine oil level > page 278 and add engine oil
immediately > page 279.
3 Add max. x qt (x J) oil. You can continue
driving
Add the amount of oil shown immediately
=> page 279.
Reducing the oil level
3 Please reduce oil level
There is too much oil in the engine and there is a
risk of damaging the catalytic converter or en-
gine. Drive to an authorized Audi dealer or au-
thorized Audi Service Facility immediately to have
engine oil extracted if necessary. Avoid high en-
gine speeds, full acceleration, and heavy engine
loads.
278
Engine oil sensor
=) Oil level sensor: oil change necessary. Please
contact Service
Fuel has entered the engine oil. This will cause
the engine oil level to rise slowly and the engine
oil quality to decrease. Do not extract engine oil
to reduce the level, because this will increase the
risk of engine damage. Drive to an authorized
Audi dealer or authorized Audi Service Facility im-
mediately to have engine oil extracted.
& Oil level system: malfunction! Please con-
tact Service
The sensor that checks the engine oil level has
malfunctioned. Drive immediately to an author-
ized Audi dealer or authorized Audi Service Facili-
ty to have the malfunction repaired.
2 Oil pressure sensor: malfunction! Please
contact Service
The sensor that checks the engine oil pressure
has malfunctioned. Drive immediately to an au-
thorized Audi dealer or authorized Audi Service
Facility to have the malfunction repaired.
Engine warm-up request
i Please drive to warm up engine
Fuel has entered the engine oil, either due to low
outside temperatures or frequent short drives.
Drive until the engine is warm so that the fuel in
the engine oil will evaporate. Avoid high engine
speeds, full accelerating, and heavy engine loads
when doing this.
@) Tips
The oil pressure warning B is not an oil level
indicator. Always check the oil level regularly.
Checking the engine oil level
The engine oil level can be checked in the MMI.
Follow the safety precautions > A\ in General in-
formation on page 275.
> Park the vehicle on a level surface.
> Shut the engine off when it is warm.
> Switch only the ignition back on.

Index

Auxiliary climate control................ 108
Average consumption. . . vico.. s sccwe oe ein 16
Average'speed 5. 5 i cess ecu s eceen sc eae 16
B
Bag: HOOKS’: « sexs « v saves 5 & wee + ¥ ewe & & eee 99
Battery
Charge levelindicator.................. 12
Charging (12 Volt vehicle battery)....... 286
High-voltage battery..............000- 136
Vehicle battery (12 Volt)............... 284
Winter operation (12 Volt vehicle battery) . 285
Battery (vehicle)
refer to High-voltage battery........... 136
Block route... 2.6.6... cece eee eee eee 234
BLOWERS. «cress uv sence 0 « samen e « coneaae « o scatings 105
Bluetooth
Audio player..............0 0-00 e ee eee 252
Connecting acell phone............... 200
Deleting adevice.......... cece ee ee eee 268
Device overview...............0.0000. 268
Disconnecting a device................ 268
Displaying profiles.................... 268
Searching foradevice..............05. 268
Selecting adevice...............-.00. 268
Specifying’a favorite weiss e scsive os sues e 268
BOOS: s ¢ wars 5 = ova 6 2 sue ye HeUR oe EGE 16
Boost function sacs ss sees 3 ¢ cepa yo vees oe 116
Boost
pressure indicator................. 16
Brake fluid
Checking the brake fluid level........... 283
Brak@Siovn: + « seuss ¥ x sus ¢ 2 ees 2 o eae Fe ee 123
Brakeiassist's cscs 2 sscmws ve asco sw aan 3 133
Brake fluid... 0... eee eee eee eee 283
Emergency braking function............ 125
AO Becca a a commas oo a amasoes wx atoms amare © Se 126
New brake pads.............0-. eee ee 123
Break-in security feature..............0.. 46
Breaking in
New brake pads..............---0000- 123
NGWtIRGS:: « x zaxus x x soups 4 ¥ eons Fe eee ge 296
Browser
refer to Media center..........0.eee0us 256
Bulb'replacement cs + « sews a 2 exis xe ewe 3 330
Business: address): s « can x s gem as caw aca 234
344
C
California Proposition 65 Warning........ 275
Battery Specific-ces s cose sv eam 2s wees s 285
CALLLISt®s « meee ¢ 9 ewan & Hatem & E Rae gS 204, 206
Cameras... 2... eee eee 155
Locations wis « ¢ caren 5 ¢ sare se eee es ews 156
Capacities
Puteltanike. « swasaue x ancasnsos e anomees 2 a anawnme @ x a 342
Washer fluid reservoir................. 342
Cargo net... .. cece cece eee ee eee eee 101
Caw ROY ies cosens ao eveaiee a © crear « @ eames @ aoe 47
Car phone
Serial number (IMEI) ...............005 211
SWItChING GN: cen « = scum ¢ : neue & 5 woe e ge 211
Carwash... . 2... eee eee eee eee 309
Catalytic converter..............-00000- 274
Cell phone
refer to Telephone............00eee 00 200
Cell phone compartment
refer to Audi phone box............... 202
Central lOCKING ss « « saves 5 « eee sy eee 2 ees 43
AUtOLOGKS. & accu + anasies x wee + coum oe oem 43
Convenience key............0e ee eeeeeee 48
Convenience opening and closing......... 54
Luggage compartment lid............... 50
Mechanically unlocking and locking....... 46
M@SSAQES « sees i eee8 bv ose ey Pe 8s ee 45
Remote control key.... 20... . eee seen eee 48
Setting ..... 6... eee cece eee eee 44
NGNICLE-KEY scien & & gece s & ets 3 ¢ Saree & x eae 48
Central locking switch............0e ee eee 45
Ceramic brakes............ 0.0 .00000005 123
Certification... 0... eee eee eee 339
Changing light bulbs................... 330
Charging
refer to Power SOUrCES...... eee ee eee ee 97
Charging clip
refer to Wall mount clip............... 150
Charging display............... 0.0 ee 140
Charging the battery (mobile devices) . 202, 254
Charging time............. cee eee eee ee 137
Child safety lock
Climate control system controls inthe rear. 53
POWEr WIN OWS: 5 & exes 5 2 awe se cee & 6 53
Rear GOONS isi: 3 © cee 2 o cena + wave eo ete 53