CITROEN DS3 Owner's Handbook Manual page 114

Model with front foglamps and
a rear foglamp
C. Foglamp selection ring.
The foglamps operate with the dipped and main
beam headlamps.
Front and rear foglamps
Rotate and release the ring C :
forwards a first time to switch on the front
foglamps,
forwards a second time to switch on the
rear foglamp,
rearwards a first time to switch off the rear
foglamp,
rearwards a second time to switch of the
front fog lamps.
When the lighting is switched off automatically
(with AUTO model) or when the dipped
headlamps are switched off manually, the
foglamps and sidelamps will remain on.
Turn the ring rearwards to switch off the
foglamps, the sidelamps will then switch off.
In good or rainy weather, by both day
and night, the front foglamps and the
rear foglamp are prohibited. In these
situations, the power of their beams
may dazzle other drivers.
Do not forget to switch off the front
foglamps and the rear foglamp when
they are no longer necessary.
Lighting on audible warning
When the ignition is switched off, all
of the lamps switch off automatically,
unless guide-me-home lighting is
activated.
If the lighting is switched on manually
after switching off the ignition, there
is an audible signal when a front door
is opened to warn the driver that
they have forgotten to switch off the
vehicle's lighting, with the ignition off.