Most birds cannot move their eyes within their sockets. In order to stabilize the retinal image when moving, a bird has a head that is kept steady via what is called an optokinetic response.
It's a nice option but I'm going to guess it's expensive to fix like active body control which was what magic body control replaced. It's on the 2014+ S550 so only on their high end line for now.
Originally Posted By: Kestas
There was even a third video where MB responded to Jaguar.
I had to look that up- pretty funny too. I like that they seem to have a good natured, friendly rivalry going on. It says a lot that they can promote themselves without getting petty.