Massive thanks to abominable doughnut, I'm having the same problem too. But does anyone know if the switch is the same one for the SD4?

Hello, anyone else experienced the rear wiper only going mid way? If I 'assist' it, it will do the full wipe, but left on its own it will only do half. It parks okay, so at least I can open the window. I see there are plenty 2nd hand motors on eBay, if replacement is the only option. But...