Fifth Gear: they "want to get it right"? This has got to be one of the simplest of the "hi-tech" features available, that any high schooler can install themselves (and do so quite often). What could the hold-up possibly be? Just word the regulations carefully so you don't have to re-word it when camera or display…

My g/f borrowed a diesel mercedes from a friend once, and when she pulled into the station to fill it with diesel, her passenger FORBID her to fill the tank until he checked with the owner, because he couldn't believe that a) mercedes made a diesel, and b) that a girl would know better than him.

They do, it's called the "Aventador"

Why wouldn't the rear vents be functional? They are on the C5/C6.