I fitted this
Benefit from Screen Mirroring, Waze, Google Maps, Spotify, Apple Music, WhatsApp and more with our Audi Wireless Apple Carplay & Android Auto Interface Kit. Compatible with most Audi's 2010-2019. We are UK Based and offer a 1 Year Guarantee. These MMI interfaces are Plug and Play - no coding...
bavarian-automotive.co.uk
It took about an hour to fit then you have apple carplay, you can then use apple maps, Google maps or Waze through an iPhone. This obviously gives you google search for destinations and bang upto date maps and traffic. My a6 is 2013, I understand newer ones don't need the hardware just activation.
It just brings the whole infotainment system upto date, it's just a shame the a6 doesn't have a touchscreen.