CITROEN DS3 Owner's Handbook Manual page 210

Changing direction indicator
bulbs
Rapid flashing of the direction indicator
warning lamp (right or left) indicates the
failure of a bulb on that side.
Turn the bulb holder a quarter of a turn and
extract it.
Pull out the bulb and change it.
To refit, carry out these operations in reverse
order.
Amber coloured bulbs, such as the
direction indicators, must be replaced
with bulbs of identical specifications
and colour.
When refitting, close the protective
cover carefully to preserve the sealing
of the headlamp.
Changing dipped beam headlamp
bulbs
Remove the protective cover by pulling on
the tab.
Disconnect the bulb connector.
Spread the springs to release the bulb.
Extract the bulb and change it.
To refit, carry out these operations in reverse
order.