It appears the Germans are covering all the bases. Diesel has been a big thing in Europe and world wide for some time. Now we’re starting to see them more in the USA. But along with the diesel is coming hybrid. So it appears that BMW and all the other German builders are covering all bases. If you test drive both, it may be diffcult to make a choice as both are more than acceptable alternatives. How about this!! They’re talking about a diesel/hybrid as well. So now you have the advantage of both technologies giving you the best mileage possible. This means that luxury German builders could deliever cars giving in excess of 70 mpg and still provide superior performance and comfort. count me in!!