On my relatively new V70 2.5T, I've started to hear a noise coming from the back tailgate area. It's a noise that would suggest the tailgate being partially open, which of course it's not (I've checked). The noise is out of sync with bumbs in the road, turning, stopping etc. and seems to randomly occur every five to ten seconds or so unless in cruising on a smooth highway. It sounds like plastic against plastic. The dealer tried fixing it by tightening the tailgate latch, but to no avail.

Thanks,

Michael