I bought a 82 300SD off eBay and should have walked away from the deal as there we lots of things that made me suspicious about the deal that I won't get into here. While I did finally get the car and drove it 600 miles home, it's rarely ran for more than a week at a time since. I think I might be getting close on the electrical and cooling issues, but the car still suffer from a very, very, very rough idle and hard start. After it's going or above 1500 rpm it's smooth as glass. I read that air in the fuel lines could cause this but haven't a clue how to check it out.

I need the name of a good mechanic in the Michigan Thumb Area (Midland, Bay City, Saginaw, etc) and some straight advice.

Thanks
Jim