Replace Rear Wiper Arm on 9-5 wagon

[xorlando]

Can someone post a link or how-to to replace the rear wiper arm on my '05 9-5 wagon?
Ideally I'll source the replacement and do it myself. My Haynes manual wasn't entirely clear.

Most of the arm is intact. It's the last part of the arm, which is meant to flex, that got cracked in half when I opened it to quick while a kayak was overhead.

[swisssaabist]

Lift the plastic cover from the aspersion system take out gently the part under the arm you will find a nut you can unscrew this for undo the arm

[swisssaabist]

I know GM parts are compatible for rear wiper and arm maybe less priced than SAAB
Opel in fact for Europe.