I can say without a doubt that this is the reliable, most comfortable and best performing of the three MB I had owned. The "R" is more roomy than either the ML and, yes, even the GL. It also handles better and is more pleasant on the highway. How the minivan label became attached to this model is confusing. It is not styled or functions like one. The diesel is the only engine to have as it accelerates strongly and is very frugal for a vehicle of this size. The styling was not my favorite at first, but has grown on me. It is hard to find an "R" owner that does not love their car. It is very large and very comfortable with outstanding fuel economy for it's size because the diesel engine. Power and torque are amazing. I enjoy driving this car with my daily 45sh mile commute. We pay at the pomp average $2.50 for the fuel which averages 25 MPG overall and tops out at 27 with mostly highway travel. Good job Mercedes!