The Return of the ML320

We have been driving the 240D as our only vehicle for the last month due to the absense of our other Mercedes, the ML320. The ML was in an unfortunate collision at a stoplight - we were stopped, but a truck in a lane to the left rear-ended another truck and side-swiped the ML. With the return of the ML, we still will use the 240D for almost all of our about-town errands, but Sue and I have concluded that the 240D would be torturous on a vacation since it will not maintain a steady 75 MPH on the highway in our mountainous part of the USA.