Sorry for the thread bump, but I found this thread when I had this issue a week ago, and I just wanted to update it with my experience in case it's of any help to anybody who finds this in future.
Kwik Fit (in the UK) fitted 4 new tyres to my e-tron and corrected the wheel tracking. They then recalibrated the ADAS (because of the change to the tracking), but made a complete mess of it. I ended up with 3 permanent warnings on the car: faulty distance warning, faulty pre-sense, and air suspension stuck in service mode. Kwik Fit couldn't fix it, even at another branch, so they said they'd pay for Audi to sort it (and also gave me a hire car in the meantime).
Anyway, Audi fixed the three warnings but then I was stuck with "Adaptive cruise assist not available right now. Please see owner's manual." every time I tried to use ACC. I took my car to them a second time, and they sorted it. They said the software was "massively out of date" for the ACC, and that later e-tron models now have self-calibrating ACC. So they updated my 2019 e-tron to the latest self-calibrating software. I'm assuming they meant software specific to the ACC, as the "main" car software was already fully up to date. I already know from getting my virtual wing mirrors sorted that lots of individual components of the car have their own software/firmware, it isn't a single centralised piece of software.