I've had my 2017 2SS Since September of 2016. Currently at approximately 56K miles. Here are my issues so far:
- A8 shudder at 17K miles. 3X flush lasted until 20K miles when shudder returned. Replaced torque converter under warranty. Shudder-free ever since.
- Brake vibration (repaired rotors and pads under warranty). This has happened twice.
- Replaced shifter assembly after micro-switch sensor failed. Would be in "Park" but DIC would say "Shift to Park."
- Recently replaced battery (it was time).
That's pretty much it! This car is a BEAST!