Americans, what u see so far as Diesel is very old tec. (mostly because of the poor quality of Diesel in the US) You cant get all the quality Diesel have in Europe with 2nd class fuel. I do own two Diesels (Rabbit TDI and Benz C220 CDI) and there is no shaking and no noise INSIDE that is much different from a gasoline vehicle. With Bluetec added the NOx Problem is gone. With particle filters (standard on a lot ofe European cars) the smog problem is limeted. So upgrade to the best avail tec and try it!