My S60 MY04 has been having the following problem for a few weeks now. If I’m driving with Tempo80 or higher on a federal road or highway, I always hear a kind of “flatten” out of the trunk. (or behind the back seat) It sounds to describe it more precisely, like a sheet of paper, which is blown up and then gives a kind of “flat” sound of itself… only I actually have nothing in the trunk. All windows are closed – only the climate. Do you have any idea what can be there? I already get on my nerves – hopefully there is nothing broken. Thank you already in advance for the information 🙂 merci, PinocchioS60 PS: the elk now has about 38000km down.