It seems to me that white vehicles are easier to see in most conditions and therefore have some safety advantage. For those concerned about global warming they reflect more solar heat back up. Add with less cleaning requited to stay looking nice they could be much quite a bit easier on the environment. Historically white has been the longest lasting and easiest to repair. My blue E350 needed a paint job in a bad way at 10 years old but the white one that replaced it still had good paint at 13 years when I let it go. All in all a very practical color.