Mercedes SL R230 mysterious cracking / snoring back right

Good evening ladies and gentlemen, the joy of driving with my SL is clouded by non-localizable crackling sounds. I probably have the sound for about a year. When changing load cracks and crunches it. At first I thought a disguise is loose, everything checked, nothing better. Roof tested, and lubricated, everything ok guide vario roof went off, everything OK, the screw has not yet been changed. Uberrollbugel causes similar noises at the attacks, but hebli There were three or four emergency triggers because I like to move the vehicle in the border area (serpentines, riviera etc) after tank plate, no change. All mounts in the area and on the SAM etc tested, everything solid video, in which the noise seems much more extreme: https://youtu.be/7p_zg3y8kFw Do we find a fellow sufferer? Greetings and nitter-free ride