[crazyone64]

I sprayed some silicone on the bushings, no difference.
Stuck my head under the car to try and isolate it while another person pushed down on the trunk.
Seemed to be coming from the wheel well.

After removing the interior of the trunk, I crawled in and found a more specific area where the creeking was coming from.
It is almost right beside the mechanism for the seatbelt. Where it is rolled up.
Beside it was a layer of padding, then a layer of what felt like styrofoam?

It was impossible to see from within the trunk.
Any ideas ?