catalytic converter AUDI A7 2018 Owners Manual

a co .... N
" N .... 0 00 \,;J ' Checking and Filling Fuel
Gasoline grade
A pplies to: ve hicles with gasoline engines
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. Additiona l information on TOP TIER Deter­
gent Gasoline can be found on the official web­
site (www .topt iergas.com).
The individual gasoline grades are differentiated
by
octane ratings. T his value is given with (R +M)/
2 equating to AKI or in RON.
The following headings match the corresponding
sticker in the fuel fi ller door.
UNLEADED FUEL ONLY MIN. (R+M)/2 87
Regular/ MIN. RON 91 Regular
Use regu lar gasoline with minimum 87 AKI/
91 RON
i::> (@ .
The maximum engine power is only reached if
premium gasoline 91 AKI/ 95 RON is used.
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.
({D) Note
-Fill in g 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 eng ine damage.
Checking and Filling
(D Tips
The vehicle may be filled with fuel that has a
higher octane rating than what is required by
the engine .
Blended gasoline
Applies to : vehicles wi th gasoli ne e ngi ne
Use of gasoline containing alcohol or MTBE
(methyl tertiary butyl ether)
You may use unleaded gasoline blended with al ­
coho l or MTBE (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 AKI 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
fill up at busy gas stat ions where the seasonal
adjustment is more likely to be made in time .
@ Note
-Methanol fuels which do not meet these re­
quirements may cause corrosion and dam­
age to plast ic and rubbe r components in the
fuel system.
- Do not u se fuels that fail to meet the speci-
fied criteria in this chapter.
.,.
189

Checking and Filling
Fuel filler door emergency release
If the central locking system is faulty, the fuel
filler door can be unlocked manually.
Fig . 17 6 Right side trim in the luggage compartment: re­
mov ing the tr im
Fig. 177 Luggage compartment: fuel filler door emergency
release
The emergency opening mechanism is located
behind the right side trim pane l in the luggage
compartment.
Removing th e side trim
• To remove the right side trim, first remove the
retaine r from the mounts
Q fig. 176.
• Turn both locking mechanisms 90° to the left
us ing a coin or a similar object and remove the
locking mechanisms.
• Tilt the retainer upward and pull the trim out.
Lay the trim down on its side, because there is
an electrical w ire for the socket* on the back .
Fuel filler door em ergenc y relea se
• Loosen the strap from its bracket and pu ll on it
Q fig. 177 c:t,(I). The filler door is released.
•Presson the left side of the fuel f iller door to
open it
<=:>page 190, fig. 174.
192
(D Note
Only pu ll on the loop until you feel resistance .
You will not hear it re lease . Otherwise you
could damage the emergency release mecha­
nism.
Emissions control
system
Cat alytic converter
The vehicle may only be driven w ith unleaded
gaso line, otherwise the catalytic converte r will be
dest royed.
Never dr ive until the tank is completely empty.
The irregular supply of fuel that results from that
can cause engine misfires. Uncombusted fuel will
enter the exhaust system, which can cause over­
heating and damage to the catalytic converter.
&_ WARNING
The temperat ure of the exhaust system is
h igh, both when drivi ng and a fter stopp ing
the engine.
-
- Never tou ch the exhaust tail pipes once they
have become hot. This cou ld resu lt in burns.
- Do not park your vehicle over flammable
materials s uch as grass or leaves because
the hig h temperature of the emissions con­
trol system could start a fire .
- Do not apply unde rbody protectant in the
exhaust system area, beca use this increases
the risk of fire.