ive had a couple rattles at different times.. nothing that sticks around long enough to bug you or feel the need to track down. Certainly not a reason to avoid purchasing a gt350.
Having a 2018, I don’t have the B&O sound system. When I was in the market for a pre owned R, I noticed that option on the new model years and it intrigued me for 2 seconds until I remembered how I never listened to music in the car when I had a 2017 350. I find it somewhat refreshing and peaceful to have just the sound of the car and my thoughts.No rattles what so ever in my 2016 with just under 13K miles. The sound of the vooooooodoooo will make you forget about noises. A radio is pretty much useless once you put your foot in it.