S55 Automatic Wipers

[Mmmm]

The automatic setting on my windscreen/windshield wipers, has stoppedworking, the car is an S55 (2003) W220.

Normallyyou twisted the stalk to the first setting and the ipers would go once and then work automatically depending on how much rain or snow there was, now twist the to position one and they just sweep once.

Can they be reset ?

Thanks for any help