I'm trying to diagnose my 1989 300E's non-functional cruise control. Given the way the cruise control stick feels, I'm fairly sure it's broken.

I attempted to remove the steering wheel to check and was unable to do so. The part I got stuck on was unscrewing the countersunk screw. I couldn't get it to budge. I tried using some goose-neck pliers on the allen wrench for leverage and still had no success.

Any suggestions?


-Hope