Doesn't BMW make stretched versions of the 5 and 7 series?
Why not a stretched option for the X5?
You still may not be able to fit adults in the third row, but at least it would give better leg clearance for adults in the back seats (throw the kids in the 3rd row!
). Add to that a rear bench (back seats) that can be adjusted/slide back and forth, and you have a much more versatile people hauler.
Rui