CITROËN DS 4 Handbook page 304

Recommendations on storage
freezes at about -11°C and
®
AdBlue
deteriorates above 25°C. It is recommended
that bottles be stored in a cool area and
protected from direct sunlight.
Under these conditions, the additive can be
kept for at least a year.
If the additive has frozen, it can be used once it
has completely thawed out.
Never store bottles of AdBlue
vehicle.
Procedure
Before topping-up, ensure that the vehicle is
parked on a flat and level surface.
In wintry conditions, ensure that the
temperature of the vehicle is above -11°C.
Otherwise the AdBlue
so cannot be poured into its tank. Park your
vehicle in a warmer area for a few hours to
allow the top-up to be carried out.
F Switch off the ignition and remove the
® in your
key, or if your vehicle has one, press the
START/STOP button to switch off the
engine.
may be frozen and
®
F Raise the boot floor for access to the
F Unclip the black plastic blanking plug using
F Insert your fingers into the aperture and
F Carefully lift off the cap, without dropping it.
tank.
AdBlue ®
Secure the boot floor by attaching its cord
to the hook on the parcel shelf support.
its tab.
turn the blue cap a 6
th of a turn anti-
clockwise.