I am getting a rattle behind driver side… sounds like its inside the door or perhaps where the top goes down. It happens when I hit a bump, but is otherwise not present. Doesn’t seem mechanical, more like loose trim? Is there a way to find this?
Yes, start removing parts until you find the loose one or the rattle goes away. Duct tape works to temporaily hold things that you think might be rattling.
I would suggest putting the car on a lift and checking underneath for loose exhaust shields or stab bar links first before digging into the door.