http://members.aol.com/buckweeat/assembly2.jpg

There's a single screw where the yellow arrow points to. Past that i'm clueless. I tried to pry it open from there but no luck.

Thanks!

Paul

BTW: the blue line shows how far my hydraulic arm extends in the parked position (about '2 inches too far)which causes wiper to hit window molding on each side. I think something went haywire inside, so I wanna take a look.
(thanks MBenz for the pic)

Did you buy a new arm or using the old one.

On 124 there is the swf and bosch ones, its a half circle and they are opposite of each other so they much match. if you bought the wrong arm it will either not fit or cause the problem your describing.

The arm should just stick in and screw down. Other than that I cant help you.