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Fuel and Refueling
"' Loosen the strap from its bracket and pull on it
¢ fig. 191 . Now you can open the fuel filler flap
as usual.
Selective
catalytic
reduction
(AdBlue/DEF)
General information
Applies to: veh icles with selective catalyt ic reduction
In vehicles with selective catalytic reduction, a
urea solution (Ad Blue/DEF) is injected into the
exhaust system before a nitrogen oxide catalytic
converter to reduce nitrogen emissions. The urea
solution is known as Ad Blue or DEF (Diesel Ex-
haust Fluid). AdBlue is used in the following.
The AdBlue is carried in a separate tank in the ve-
hicle. The Ad Blue usage accounts for approxi-
mately 0 .5% to 2.5% of the diesel fuel that is
used.
When a message about refilling the Ad Blue ap-
pears in the instrument cluster display, you must
refill the Ad Blue yourself or have it refilled by an
authorized Audi dealer or authorized Audi Service
Facility ¢ page 215.
(D}
Tips
- The display indicates the distance remaining
that can be driven¢ page 214. 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
Applies to: vehicles with 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 if the Ad Blue in the tank
drops below a certain level.
Ad Blue /9
Refill Ad Blue. See owner's manual
214
This message appears when there is only enough
Ad Blue left to drive the distance indicated in the
instrument cluster. Fill the Ad Blue.
AdBlue
/9
Refill Ad Blue! No restart in x mi
(x km)! See owner's manual
This message appears when there is only enough
Ad Blue left to drive the distance indicated in the
inst rument cluster. Fill the Ad Blue. Otherw ise
the engine will not start again if you stop it once
the distance indicated has been driven.
Refill Ad Blue! No restart! See own-
er's manual
This message appears when the Ad Blue tank is
empty . Fill the Ad Blue. Otherwise you will not be
able to start the engine again once you stop it.
The Ad Blue must be refilled when the amount in
the tank has reached the minimum level
¢
page 215, Filling AdBlue .
Incorrect filling/system
malfunction
A message appears if the Ad Blue tank was filled
with a fluid other than Ad Blue and the system
has detected that the tank was filled incorrectly,
or if there is a system malfunction .
Ad Blue
-I'
AdBlue: Fault! No restart in x mi
(x km)! See owner's manual
This message appears when it is on ly possible to
drive the distance indicated in the instrument
cluster. Drive to the nearest authorized Audi
dealer or authorized Audi Service Facility to have
the malfunct ion corrected. Otherw ise the eng ine
will not start again if you stop it once the dis-
tance indicated has been driven.
AdBlue: System fault No restart!
See owner's manual
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 authorized Audi dealer or authorized Audi
Service Facility to have the ma lfunction correct-
ed . Otherwise you will not be able to star t the en-
gine again once you stop it.
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