CITROËN DS5 Owner's Handbook Manual page 58

Boot
Opening from outside
 After unlocking the boot or the vehicle
using the electronic key - remote control,
press the opening control then raise the
tailgate.
Opening from inside
 Press this button until the boot is heard to
unlock.
Closing
 Lower the tailgate using the interior grab
handle.
If the tailgate is not closed correctly, engine
running or vehicle moving (speed above
6 mph (10 km/h)), a message appears in the
instrument panel screen for a few seconds.
Tailgate release
System allowing the mechanical unlocking
of the boot in the event of a battery or central
locking system malfunction.
Unlocking
 Fold back the rear seats to gain access to
the lock from inside the boot.
 Insert a small screwdriver into hole A of the
lock to unlock the tailgate.
 Move the latch to the left.
Locking after closing
If the fault persists after closing again, the boot
will remain locked.