As the owner of a 300TD id have to say that any of the mercedes diesels stand out as most reliable. As for most stylish, the 198 gullwing coupes stand out in front followed closely by the 107 coupes and roadsters then a distant 3rd the elegant 109s. The 6.9 SEL 116 is a great road car, the 5 cylinder turbo diesel arguably the best all-round M-B engine (power,economy,maintenance, and longevity)and the 109 being the most practical body style. If you could put all this together you'd have a car M-B unfortunately never built. My opinion everybody: the 1978-80 116 300SD. Classic body style and tough engine with good fuel economy. Just my $0.02, but why the W124???