I think that the nav screen placement could be improved. I don't think the stuck on look is good from a design standpoint. Things should look integrated with eachother, as if they are all part of the whole. The screen looks like it doesn't actually belong. There is enough room with the three vents underneath for Benz to improve upon the design.
I think this set-up would be cool if it was a mount for your iPad or tablet. you could take it with you and then put it back when you get in the car. Then the design would have some type of purpose. Right now I think it is a glaring missed opportunity.