From Outside; From Inside - CITROEN DS3 Owner's Handbook Manual

Doors

From outside

After unlocking the vehicle using the
remote control or the key, pull the door
handle.

From inside

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 on 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 on the
multifunction screen for a few seconds.