Studder or Shaking
 

2015 A8L wheel turned hard left or right in forward or reverse serious shaking.
Does anyone experience this and if so did you get this resolved. this started at 25,000 miles.

Sounds like a CV joint going bad. Especially when you turn them all the way to one side or the other. But you'd figure that they'd last longer than that. Are you getting feedback through the steering wheel?