2016 GTI S DSG 5th through 6th grinding.
Although I traded my car in, I do have to mention that literally on the day of the trade in the car experienced unbelievably loud 5th and 6th gear whooshing/rattling sound while driving on the highway and switching between gears.
At 60,000 miles I started to experience this strange air sucking noise at around highway speeds but I didn't make much of it till a few years later at 90,000 miles above occurred. Needless to say when I had VW take a look they said all was fine and operated as normal even post DSG flush. Well, all I can say there is a definite issue and it does get a lot worse.
I recently read a clutch pack replacement might do it but at this point, I am in a Toyota and the car is out of my life sad but tis what it is.