CITROEN DS3 Owner's Handbook Manual page 214

Changing the number plate lamp
bulbs (W5W)
Insert a thin screwdriver into one of the
outer holes of the lens.
Push it outwards to unclip.
Remove the lens.
Pull the bulb out and change it.
Third brake lamp (4 W5W bulbs)
Open the boot.
Remove the plugs A on the inner panel.
Push on the centre of the lamp using
two screwdrivers to lever it outwards.
Disconnect the connector and if necessary
the screenwash pipe from the lamp.
Turn the bulb holder for the faulty bulb a
quarter of a turn.
Pull out the bulb and change it.
To refit, carry out these operations in reverse
order.
Third brake lamp (LEDs)
For the replacement of this type of LED lamp,
contact a CITROËN dealer or a qualified
workshop.