Selective Catalytic Reduction - Audi A8 2015 Owner's Manual

.. Loosen the loop
C?
fig. 193 from the retaine r
and then pull on t he loop carefully
~CD-
.. Press on the left side of the fuel filler door
to open C? page 223, fig. 190.
(D
Note
Only pull on the loop until you feel resist-
ance. You will not hear it release. Other-
w ise you could damage the emergency re-
lease mechanism .
Selective catalytic
reduction
General information
Applies to vehicles: with diesel eng ine
On vehicles w ith select ive catalytic reduction,
an urea solut ion (Ad Blue) is injected into the
exhaust system befo re a nitrogen oxide cata-
lytic converter to reduce nitrogen emiss ions.
The AdBlue is stored in a separate tank in the
vehicle. The Ad Blue usage accounts for ap-
proximately 0 .5% to 1.2% of the diesel fuel
that is used.
You must refill the Ad Blue or have it refilled
by your authorized Audi dealer or qualified
workshop as soon as the Ad Blue refill mes-
sage appears in the instrument cluster
C? poge 226.
,&
WARNING
Failure t o heed Ad Blue refi ll information in
t he inst rument cluste r can prevent the ve-
hicle from being st arted and driven. If the
vehicle cannot be driven and an emergency
arises, persona l injury can occur.
- Always have the Ad Blue tank refilled well
before the tank runs dry .
@
Tips
- The inst rument cluster display indi cates
the distance remaining t hat can be driv-
en
C?
page 225 . If the Ad Blue tank is
complete ly empty, the engi ne will not
start again after the ignition is switched
off.
Fu e l s uppl y and filli n g your fuel t a nk 225
- Ad Blue is required by law to operate this
vehicle .
Indicator in the instrument cluster
display
Applies to vehicles: wit h diesel engine
The display indicates if the Ad Blue level is low
or if it was filled incorrectly.
Fig. 194 I nstrume nt cluste r: indicator in the displ ay
AdBlue level low
You w ill be informed if t he Ad Blue in the tank
drops below a certa in level.
Please refill Ad Blue. Range 1500 miles
(2400 km)
This indicator appears when there is on ly
enough AdBl ue left to drive the distance indi-
cated in the driver information system. Please
add AdBlue.
AdBlue /;
Refill AdBlue! Cannot start en-
gine in 600 miles ( 1000 km) ! See owner's
manu al
This indicator appears when there is only
enough Ad Blue left to drive the distance indi-
cated in the driver information system. Please
add AdBl ue. Otherwise the engine will not
start again if you stop it once the distance in-
dicated has been driven.
Refill AdBlue! No restart! See
owner's manual
This message appears w hen the Ad Blue tank
is empty. Please add Ad Blue. Otherwise you
will not be able to start the engine again once
you stop it. ..,.