I am just wondering what is the correct size of the windshield wiper for my car 260E? I just bought one from the hardware store and its 24", I had a hell of a time trying to put it on, I had to flip it up-side down before the lock mechanism will go in correctly and then I flip the wiper blade back into the correct position. Anyway it still doesn't appear to fit. The edge still touches the edge of the windshield (where windshield meets teh metal frame.). So i guess I must have picked up a wrong size blade.

What is teh correct size blade. How do you know that you installed properly. Looks like I didn't.