I have a w123 230ce 1984 manual 135,000 miles, I'm the second owner from new. I despair about the rain water leaks (everything tried - sunroof, heater, battery box, windows etc). White paintwork rather tired now partially as a result of my trying to trace the leaks. Should I try to sell it (if so how much?) or get it sorted out professionally. I rather fancy a W208 CLK to replace it. Any advice gratefully received.