So, like many my rear wiper failed.  I found it quite easy to remove the panels in the boot so that bit done, however I am unable to remove the wiper arm from the motor, got the nut off, that was tight !, apparently the arm should then "pull" off from what i read, but i have tried everything and cant get it off. Any idea ? looking at the replacement motor its on some form of push and click system, but how do you get it off mine wont budge and ive pulled as hard as i can.

Another option is using a wiper arm puller such as this:

http://www.ebay.co.uk/itm/380978299549