Intestesting
as once apon a time they said it couldn't be done

was looking over the internet as you do and stumbled across a genuine Audi smartphone interface retrofit

and the funny thing is this kit is being sold by a genuine Audi dealership

this will suit the Audi Q7 4M MY16

its not cheap at £270 plus you have to fit it and it don't say how much work is involved
but glad to see as far as I can see it can be done

M