CITROEN Grand C4 PICASSO Owner's Handbook Manual page 206

Visibility
Model with front and rear
foglamps
204
Foglamps
The foglamps operate with the dipped and main
beam headlamps.
Rear foglamps
To switch on the foglamps, turn the ring C
forwards.
To switch off the foglamps, turn the ring C
rearwards.
When switching off dipped beam
manually, the rear foglamps also go off.
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 foglamps,
rearwards a first time to switch off the rear
foglamps,
rearwards a second time to switch of the
front fog lamps.
When the headlamps switch off with automatic
illumination of headlamps or when the dipped
beam headlamps are switched off manually, the
foglamps and sidelamps remain on.
Turn the ring rearwards to switch off the
foglamps, the sidelamps will then switch
off.