I own two 124's, and often drive my mechanics '88 300E. Of the bunch, to me, the most refined of the bunch is the '95 E320. Performance-wise, the car is no slouch, it has a great balance between handling/ride, and in no way feels any way compromised to the other to w.r.t. quality. Most that have the opportunity to drive my E320 are surprised at the responsiveness and driving experience of the car. I wouldn't hesitate to own another.

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John Gillespie
1988 560sec - 192k miles
2006 CLK500 - 40K miles
1995 E300 - 202k miles