A lot of your decision will depend on your physical size too!! I am 6 ft tall and weigh 250 lbs. We have a 92 190-E (my wife's) that I am not comfortable in. It's a bit "snug" for me.
I waited two years and just recently bought an 89 300E. This car works really nicely for me (and my size).
Keep that in mind when making your decision. Having good mechanicals / cosmetics is nice, but you have to SIT INSIDE THE CAR!
1989 300 E
1992 190-E 2.3