For myself the complexity of the turbo is a negative. Also they originally came from the factory with trap oxidizers which were sort of catalytic converters which were located between the turbocharger and the intake, so if the converter came apart (and they did) the fragments would destroy the turbo. Mercedes replaced all that at no cost to the owner. The model seems sort of jinxed to me because of that.

The na engine seems like a simple nearly 616 in its simplicity and powerful enough.

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.