I just took delivery of a 2015 A3 Prestige with the B&O sound system. Every time I restart the car the volume lowers from my average of 18 or 19 down to 12.

I have researched this as much as I could here and on other forums but cannot find an answer as to how I can change this. I do have a VAG-COM cable and can't find any codings that will affect this.
There is no "Radio" module at address 56. Why?

Does anyone know the solution?