From Outside; From Inside - CITROEN DS3 Handbook

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 door lever to open the door; this
unlocks this vehicle completely.
closing
When a door is not closed correctly:
- when the engine is running, this
warning lamp comes on, accompanied
by a message in the multifunction
screen for a few seconds,
- when the vehicle is moving (speed
higher than 6 mph (10 km/h)), this warning
lamp comes on, accompanied by an
audible signal and a message in the
multifunction screen for a few seconds.