Noise sounds like a loud "creaking" type sound. You can push down on the body of the car right behind the passenger side rear door to recreate it.
Does anyone have any idea what the cause could be?
Thanks

Check rear sway bar bushings and links. Most time its links

Just repaired same problem on my S-500 coupe last week. Mine sounded as if the tail pipe was hitting the body. Turned out to be the front swaybar link. Cost me about 40 bucks for piece. A little work to replace. Had to remove caliper and disk to get at top mounting bolt on link.Be sure to place a jack under sway bar to relieve pressure before removing bolts all the way. It was a crazy kind of set up. You will need to hold an allen wrench while removing bolt you will see not to tough and will made great improvment I will be doing other side and frame bushing when weather brakes here in Jersey. Good luck Voz