I've been looking for a benz to convert to wvo and ran across this 300sd turbo diesel with only 101,000 miles on it. It wasn't for sale but they said it runs and I know I can get it cheap,$ 800.00 cheap! I wanted to learn a little more about them before I bought it. Seems maybe early 80's? late 70's, I'm new to these cars how do I tell without going back and bugging the guy before I'm ready to buy it????