Checking and topping up fluids
exhaust system and cause damage to the
catalytic converter(s).
It is not sufficient to simply have AdBlue refilled
when the vehicle is serviced because this may be
necessary more often than services are due or be-
tween service intervals.
– Vehicles with diesel engine: When filling
the fuel tank after having run it completely
dry, the ignition must be switched on for at
least 30 seconds without starting the en-
gine. When you then start the engine it may
take longer than normal (up to one minute)
for the engine to start firing. This is because
air needs to be bled from the fuel system
while starting.
As soon as a message appears in the instrument
cluster display reminding you to refill AdBlue,
you must refill the AdBlue tank or have this done
by a qualified workshop ðpage 230.
Checking range
The AdBlue consumption depends on the ambi-
ent and operating temperature and on how the
vehicle is driven. The estimated remaining range
can be viewed in the instrument cluster display
For the sake of the environment
– Do not try to put in more fuel after the au-
tomatic filler nozzle has switched off; this
may cause the fuel to overflow if it becomes
warm.
ðpage 17, Instrument cluster controls and
ðpage 17, Fig. 3.
1
Legal information
– Never pour fuel down drains or into the
ground.
– It is not permitted to make technical changes
to the emission control system which have an
effect on the exhaust gas treatment using
AdBlue.
Having the fuel tank flap released
manually
– Audi has approved this vehicle for use only with
AdBlue corresponding to ISO-22241-1, for
which the Certificate of Conformity for this type
of vehicle has been issued.
►
If you cannot open the fuel tank flap, seek pro-
fessional assistance.
Then drive to a qualified workshop and have the
fault rectified.
►
– It may be a crime to operate the vehicle without
the AdBlue which corresponds to ISO-22241-1.
– If the emission control system is not operated
as intended, the exhaust emissions may wor-
sen.
Selective catalytic
reduction (AdBlue/DEF)
Introduction
– The use of AdBlue for the operation of this vehi-
cle is required by law.
On vehicles with selective catalytic reduction, a
urea solution (AdBlue/DEF) is injected into the
exhaust system upstream of a NOx catalytic con-
verter in order to reduce nitrogen oxide emis-
sions. The catalytic converter changes nitrogen
oxides into nitrogen and water with the help of
the urea solution AdBlue/DEF. The urea solution
is known as AdBlue or DEF (Diesel Exhaust Fluid).
The term AdBlue is used below.
Information on AdBlue
– The instrument cluster display will tell you how
far you can drive before the tank runs dry
ðpage 230, Low AdBlue level. If the AdBlue
tank runs dry, the engine cannot be started
again after you switch off the ignition. Never
run the AdBlue tank completely dry.
– Please follow the AdBlue manufacturer's in-
structions for storage and use.
The AdBlue is held in a separate tank in the vehi-
cle. AdBlue consumption is normally between
1.0 ltr. – 2.5 ltr./1000 km. In individual cases,
the consumption may be different as a result of
how the vehicle is driven along with the operat-
ing and ambient temperature.
– Restrictions may be encountered when refilling
in very cold temperatures, because the freezing
point of AdBlue is -11 °C.
229
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