How do you change door lock on Citroen Picasso?

To change the door lock on a Citroën Picasso, first, remove the door panel by unscrewing any screws and gently prying it off. Disconnect the electrical connectors and the lock mechanism from the door. Replace the old lock with the new one, reattach the connectors, and then reassemble the door panel. Ensure everything is securely fastened and test the new lock before finishing.