How big do you really need the screen to be though. Is that screen in the A4 'retractable' or the merc'esq tablet style?
B&O is more like a £6k upgrade that a £2k upgrade, on the A6, and you need to have the Tech pack to spec it too.
I had B&O in my 2012 A4 Black Edition A4. I'm quite sure it was a completely different spec of B&O though. It did sound good though. Not sure if it was worth any extra over the HK in my 5 series though.
S-Tronic (DSG) is an auto-clutch box (well twin auto-clutches to be precise).
Never heard the term "auto clutch box" as a marketing name though.
What's the context of the question? Where did you get "auto clutch box" from?
The only non s-tronic "automatic" gearbox available in 2016 A6's is the 8-speed tiptronic available only on the 3.0BiTDI.
That advert is for an S-Tronic box equipped car.