I was thinking of buying a '85 Mercedes, I think 300 series, and I was wondering how reliable it is. My dad says Mercedes are crap and it's gonna break down and it's gonna cost thousands for me to fix, but other people say its super reliable. I'm 16, and it's a 2 door Mercedes with 22' rims, simply irresistible for $3500. How reliable are old Mercedes, in your opinion?