chattering windshield wipers? How to fix

[shogun]

http://www.bimmerboard.com/forums/posts/292534/

[Rory535i]

http://www.bimmerboard.com/forums/posts/292534/

excuse my ignorance, but how do you adjust the angle of the arm?

[shogun]

it is mentioned in the link, see here
http://www.bimmerboard.com/members/shogun/original/windshield_wiper_adjustment1.gif