Sometimes the old ways are the best ways .Im suggesting a wrap around idea of how Mercedes could sell their durability features of the 617 motor into what has now become attractive to most US buyers and that is to revisit past car designs.The mustang ,camaro ,charger .All have been restyled to reinvent their popularity.If Mercedes could build on those ideas of how the 617 was a leader for its stable of diesel powered vehicles,it could rise interest in the diesel engine for buyers here in the US.