Thank goodness that no class B's (to my knowledge) use the VW diesel platform! Hopefully, as well, that Mercedes hasn't been playing any dirty tricks with the Sprinter's emissions.:S
When the Mercedes Sprinter 2500 first went from the 5 cylinder turbo diesel to 6 cylinders with exhaust gas recirculation, miles per gallon went from 20 to 17. I that expect VW will change exhaust gas recirculation by updating the software and experience a similar reduction in efficiency.