Hi Tackleberry
Rear Wipers can be a nightmare!
A pin is often your best friend with the water jet, before you fork out for a new motor.
Here are links to our removal videos if you didn't get lucky!
https://www.youtube.com/watch?v=hNQyllvy4SQ#action=share
and
https://www.youtube.com/watch?v=ppSE7JnhAfc#action=share
Total Technik