I have a new 2017 XC90-T6 Inscription. I noticed I was getting as much output from the center driver vent when fully open as compared to the passenger center vent. When I checked the vent control roller ****, I found out that if I fully open and back off a little, I get full output. Also, when fully closed it makes more noise and almost a whistle compared to the passenger one. I had the dealer look at it they compared to two other vehicles and found the same. They said getting a new vent will not help since others worked like that. They also said it would have to be a change from Volvo to fix if they acknowledge the problem. Anyone else experiencing this?