CITROËN C3 PICASSO 2012 Owner's Handbook Manual page 173

Boot lamps (W5W)
Detach the unit by pushing it rearwards.
Torch (Krypton 3.6V)
Open the tab.
Push with a flat screwdriver in the hole
under the tab and recover the bulb unit.
Open the bulb unit fully to change the bulb.
Practical information
Door mirror lamps (W5W)
Unclip the cover using a thin screwdriver to
access the faulty bulb.
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