Update: I located the rattle
Update: Tesla fixed it for free!
I dropped the car for this issue and another issue with the window regulator. Tesla fixed both issues for free.
I found where the noise is coming! The top window is slightly moving up and down when I push on it with my finger. And when it does, it makes the noise... Not sure if this is related but Tesla had to replace this window shortly after delivery because the front and rear roof windows were not flush.
I scheduled another appointment with Tesla SF but I'm worried they will tell me it's not covered by the warranty because it's considered a rattle. What do you guys think?
Update: Tesla fixed it for free!
I dropped the car for this issue and another issue with the window regulator. Tesla fixed both issues for free.