CITROEN C-ZERO Handbook page 23

Doors
Opening
From outside
F After unlocking the vehicle using the
remote control or the key, pull the door
handle.
From inside
F Pull the front or rear door control to open
the door.
If the doors are locked:
- opening the driver's door unlocks the other
doors,
- the front passenger door or the rear doors
must first be manually unlocked using the
lock control before being opened.
Closing
If a door or the boot is not properly
closed, this warning lamp comes
on in the instrument panel until the
relevant door or the boot is closed.
Locking/unlocking from
inside
F Push the driver's door button forwards
to lock or rearwards to unlock the entire
vehicle.
https://www.automotive-manuals.net/
The front and rear passenger door buttons
lock/unlock only the corresponding door.
Boot
Opening
F After unlocking the vehicle using the
remote control or the key, press the
handle A, then raise the tailgate.
Access
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