If you think that the E320 is uninspiring on the highway, you haven't driven it's diesel cousin. I have the E300D, non-turbo. Once up to speed it is fine, but getting there is a whole different story.

Mind you, I really like the car. To me, the fuel mileage that it gets is worth the slowness. I do have to start accelerating earlier on an entrance ramp than I would in a gas car or even in our Jetta TDI.