I am selling a few of my A3 double din bits.
I have the following ESP switch, Tyre pressure monitor switch + passenger airbag switch. Tyre pressure monitor switch is used instead of the blank switch and you don't need the system as it's connected as blank switch.
I also have the double din card tray and the trim that surrounds all buttons, plus the button holder, as in pics.
These parts are over £90 at Audi.
I am doing them for £45 inc delivery.
PM me if interested.