Selective Catalytic Reduction - Audi Q7 2015 Owner's Manual

252 Fuel supply and filling your fuel tank
addition, the expans ion space in the fuel
tank will be filled - causing the fuel to
overflow when it becomes warm and pol-
lute the environment.
@
Tips
- Running your engine while refuelling
may cause vapors to escape or even
cause fue l to spill out of the tank. This
would then shut off the fuel nozzle be-
fore the tank is full.
- Do not refuel your vehicle w ith the igni-
tion turned on. The fuel gauge may oth-
erwise not ind icate the correct fuel level
after refuell ing.
- Diesel veh icles* are equipped with a die-
sel misfueling protector. It allows the
vehicle to be fueled only w ith a diesel
fuel pump nozzle. A worn or damaged
nozzle or a nozz le that is too small may
not be able to open the diesel misfueling
protector. If this is the case, try turning
the nozz le before inserting it in the fue l
filler neck, use a different fuel pump or
see your authorized Audi dealer or au-
thorized repair facility for assistance.
Unlocking the fuel filler flap by hand
You con open the fuel filler flop by hand if the
power locking system should foil.
•
e
Fig. 235
Luggage compartment: Prying cover open
Fig. 236 Luggage compa rtment: Emergency opening
of fue l fille r flap
.. Remove the right-side trim panel with the
aid of a screwdriver ¢ fig. 235.
.. Pull the loop down in the direction of the ar-
row to unlock the fuel filler flap ¢ fig. 236.
Selective catalytic
reduction
General information
Applies to vehicles: with diesel engine
On vehicles with selective catalytic reduction,
an urea solution (AdBlue) is injected into the
exhaust system before a nitrogen oxide cata-
lytic converter to reduce nitrogen emissions.
The Ad Blue 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 ref illed
by your authorized Audi dealer or qualified
workshop as soon as the Ad Blue refill mes-
sage appears in the instrument cluster
¢ page 254 .
&_
WARNING
~
Failure to heed AdBlue refill info rmation in
the instrument cluster can prevent the ve-
hicle from being started and dr iven. If the
vehicle cannot be driven and an emergency
arises, personal injury can occur.
- Always have the AdBlue tank refilled we ll
before the tank runs dry. .,.