The 1995 will be the most reliable because it was the last year for the 124 chassis, and all the "bugs" were worked out. The OM606 engine is great. The 96/97 and 98/99 should be about the same, but I've heard horror stories about the W210 chassis. For that matter I've also heard bad things about the later engines but it's been quite rare... more issues with the tranny than engine. I'd assume all 96-99 are basically equal, but I'd prefer the 98/99 due to the awesome POWER. Otherwise I'd take the 1995, why get a 96/97 with the same engine but a less reliable chassis - for more money?
