Drive the 240D for a bit and then the 260E will feel like a rocket!
Last year my Uncle let me take his 500hp Vette for a ride. Going from a 300SDL to a 500hp Vette is a huge difference!
I was doing 80 down my street before I relized it!
Btw I checked out the new Shelby Mustang at the NY auto show. It is really nice, it is worth the wait!!