Welcome to the forum you'll find the members on here are a friendly and helpful bunch 🙂
I'd recommend a diagnostic check to see if any fault codes flag up.
I think dealer would say no, but I'd recommend you speak to autologics or Audi retrofits as members have used them for retrofits and been happy with the results
I'd say it wouldn't be worth the extra in my opinion. Let's be honest you could buy a cheap one, loose it or similar and replace it with the same one cheaper than an Audi one.
Easiest option is to just replace it with stock. I know with the Bose system once it's messed about with the amp can decide not to allow speakers to work etc. Not sure if the b&o system is the same
Who's up for simply Audi next year?
My A6 should be back on the road by then and I'll bring my daughter along to her first ever car show.
Like this year's show,
Meet point is:
Tesco Esso Express
Hythe Esso Express
Beaulieu Rd
SO45 4JH