The twin-cam straight six has always been a great engine, and the variable cam version has to rate as one of MB's best engines. It pulls like a V8 and roars when told to do so. The engine is also bullet proof, as is the transmission, brakes, and suspension. All work like new after 112k miles. BUT, the car is best suited to milder climates -- like San Fran -- because the HVAC is total crap. I've lost heat in the winter and seldom had cold air in the summer, despite spending lots and lots of money on constant repairs. The locks are also a weak spot.
As mentions: superb engine. Good ergodynamics. Classic styling.
Electrical and HVAC reliability should be up to Kia standard rather than at par with Yugo.