Hi all,

The windshield wipers on my '74 240d suddenly seem to have a mind of their own. Sometimes they work fine, other times they come on and I can't turn them off. When this happens I'm also unable to change the speed - they're stuck in the middle setting. Really annoying. I assume it's a switch issue. Is the solution to replace the entire wiper/turn signal arm from the steering column? Or is there a switch inside the arm or somewhere else that I need to replace?

Thanks,
Brian