I would be surprised if all of this tech is developed internally by Mercedes. I would expect a lot of it to be purchased (and then suitably integrated/branded,

I would be surprised if all of this tech is developed internally by Mercedes. I would expect a lot of it to be purchased (and then suitably integrated/branded, of course) products from automotive safety technology developers such as Autoliv (http://www.autoliv.com/ProductsAndInnovations/Pages/default.aspx http://www.autoliv.com/ProductsAndInnovations/Pages/default....). That should mean that the QA is not solely done by whoever puts the tech in a car, but first by the dedicated technology development company, which feels nice.