How do you change reversing light on c3 Picasso?

To change the reversing light on a Citroën C3 Picasso, first, ensure the vehicle is turned off and parked on a flat surface. Open the tailgate and access the rear light assembly by removing any necessary screws or clips. Disconnect the electrical connector, then twist the bulb holder counterclockwise to remove it. Replace the old bulb with a new one, reassemble the light unit, and reconnect the electrical connector.