CITROËN C3 PICASSO Handbook page 82

Visibility
Rear wiper
If a significant accumulation of snow or
ice is present, or when using a tailgate
bicycle carrier, deactivate the automatic
rear wiper via the multifunction screen
configuration menu.
80
B. Rear wiper selection ring:
park,
intermittent wipe,
wash-wipe (set duration).
Reverse gear
When reverse gear is engaged, the rear wiper
will operate if the windscreen wipers are
operating.
Programming
The function is activated or deactivated via the
multifunction screen configuration menu.
This function is activated by default.
Wiping zone
The curved shape of the rear screen results in
a smaller wiping zone.
Windscreen wash
Pull the wiper stalk towards you. The
windscreen wash, then the windscreen wipers,
operate for a pre-determined time.