Hello together, unfortunately for some time now have a problem with my darling, which I can not quite assign. It is extremely like this. In normal driving everything is normal. Also on the driving behavior has changed nothing. Currently 18 inch winter bikes still mounted. But with unevenness I hear under the car a very loud poltern, resp. beat. Sounds like metal on metal. Very dull. So no heat protection sheet or something light. Since I already much of the chassis pole I have of course tried all the chassis options. This did not result in any change. The noise also arises rather at the height, under the rear seat, so I would almost exclude it. Maybe someone had the same problem or are there experience values here? It is about a GP0 with now 182000km. For advice I would be grateful. Greeting Lars