Welcome to the forum you'll find the members on here are a friendly and helpful bunch 🙂 nice looking A6.
I drive an old Audi which my dad bought new then passed to me. With older ones it's all about how well it's been maintained. Mines on 339k miles on the original engine and gearbox which have never been rebuilt. Second turbo mind, first blew at 75k. Anything mines needed it's had and has never missed a service in 20 years. Plus it's been on multiple road trips including to France, Belgium, nc500 and lands end to John O Groats. As well as doing track time at castle Combe and Santa Pod.