Mercedes Benz Monster 4x4: Expedition Ready (Reduced to 33,000!)

Wow that looks great. Do these do well at highway speeds of 70-75mph+? General MPGs for a vehicle like this?
It can go all-day at 60mph. If you drive a bit less, you get better mileage (thanks, Joe917 for sharing your expertise). You can put larger wheels/tires on to make it go faster...but I was never in a hurry!