The X5 doesn't really have any off-road capabilities, the most it ever encounters is potholes and small puddles. Even if it did have some sort of extreme off-road capabilities, I doubt the owner of one would take it through the Sahara or anything. Personally I think SUVs are useless unless you really need one. It rides like a boat, it's huge, it blocks 80% of everything in sight. Also, one end of the gas hose is connected to the tank, and the other to your wallet.
The commercial is pretty dumb, I have to admit BMW makes the dumbest commercials when it comes to all the German brands. I think the best commercials are made by Volkswagen, they're pros at advertising. The dumbest commercials arre made by Cadillac, they make no sense and they play that idiot music at the end of every single one.