Well that's nice from you
I've inspected the top mounts as the noise started after replacing those. Nothing wrong there. Then I looked from below for anything, couldn't find anything wrong. Then I discovered a missing screw that should hold the bumper and the exhaust thermal shield together, leaving the shield move around. Refitted that screw, but it turned out not to be the cause for the rattle.
I can actually hear the rattle somwhere behind me on the left and a little lower, like if it was coming from the trunk area.
It's also interesting that I can't hear the rattle if the roof is down. I also looked at the roof frame and pipes (relocated motor) but nothing.
It's confusing and annoying!