rlynes, it sounds like that technician never opened a book on vehicles once in his life before. I'd ask for a new tech or find another dealership. I got so fed up with my local dealership's idiocy that I just fixed the damn thing myself. Come to Chicago and I'll fix it for you.
Also, these cars were built for the Autobahn. They'll cruise at 150 mph all day long without a single problem.