Personally I only get Audi to do a service so the car to has a full service main dealer history- i get all the other repairs - brakes, tyres etc at a local garage that I have used for years - far more reasonable pricing.
I spoke to Audi earlier- got nowhere! I'm to reach out to thier Press office - this often works faster to get answers and esclate to the right person(s). I'll keep you posted when I hear back.
My Audi Q3 2018 has the same issue - tried everthing- can't get LBC and few other stations. Volume control faded out whe trying to up volume. Other stations are ok ! Has anyone else had any luck with a solution? any help greatly appreciated. Thanks - Audi Q3 2018.