Odd noise-rear of 2017 A4 Quattro premium plus
 

Within the last 6 months our 2017 A4 has developed a noise which seems to emanate from the rear of the vehicle but only when it first starts down the road. My initial thought was maybe a wheel bearing because the sound pattern speeds up, but the speed is not nearly as fast as the wheel is turning. 10-15 minutes down the road or at highway speeds or warmed up there is no noise. Very odd. Might have the dealer take a listen by leaving the car overnight in the cold and have them drive it to listen for. The car has around 35,000 miles on it. Just baffling.