I owned an '87 300TDT. Very nice car. The problem you will have is finding one in decent condition and with acceptable mileage. And price, did I mention price? These cars are highly sought after.

I also had a '99 E320 wagon from new. I keep reading here that the W210 was "great", but no, it wasn't. It may be that I live where there's lots of snow and road salt. I see that most of the W210 boosters are in warm weather places. The Diesels obviously have a different motor, but the motor was never a problem with my car. It was the body, a/c, electrical wiring, window lifters, chassis mechanicals, electronic transmission control, etc. I wouldn't touch another one. Not if it was given to me.