Hey I feel your pain. If you search under C230, I think you'll find lots of information. I had a similar issue on mine that turned out to be a bad relay that controls the engine auxiliary cooling fan. There are other things that could cause your problem, too. My totally uneducated guess is that your problem is not the big and expensive variety. If you can't figure it out and fix it yourself, and you're outside the warranty, I'd go to non-dealership repair specialist. Good luck and enjoy!

__________________
Michael

1988 300 SL (5 Speed)
1994 E320 Wagon
1997 C230