Persistent rattle in rear passenger C pillar

[GreenMountainRaptor]

I have the same rattle, only notice it going less than about 45mph

 

[Burt]

I also have that rattle - driving me absolutely nuts - wonder if there is a TSB on it?

 

[shigman]

I kept having stuff come up on the weekend, and the rattle kinda sorta went away. It is now back with a crystal clear vengeance. I have a Friday off this week which I plan on messing with this. If I find it ill try to take a couple pictures if it works out that way, Im hoping its incredibly obvious behind that panel.

 

[Burt]

I recently latched my passenger side seat belt to see if that helped. There seems to be some play in the shoulder adjustment but I can't really locate the noise. I had my wife drive and I was in the back seat attempting to locate the rattle and it seemed like the sound was bouncing off the hard surfaces and I couldn't figure out where it was coming from. At one point I thought it was the sunroof, I would open it up all the way and close it and it seemed to stop it at first but it's not anymore, probably a placebo effect. Can't wait to figure this out. I did just get my 24 RR this week but haven't driven it more than the 3 miles home so will be interesting to see if it has the same rattle.