I have the same problem in my 2018 A4; started noticing very loud clicking noise when turning left or right with the signal on, approx 1.5 years after I bought the car. I took it to two different dealerships and both told me that it's "normal" and refused to do anything about it. How common is this issue and was anyone able to get their dealer to repair it successfully?

at least I've found solace
 

I'm not even an AUDI owner but I'm appreciative this thread exists because I just purchased a used 2018 Jeep Wrangler and have this issue. Numerous searches on google returned no one experiencing or reporting this issue until I found this thread once I stopped searching for Jeep specific problems. It is annoying, but I appreciate one of the posts hear that stresses accepting it and enjoying the ride. Thank you. :)