I have noticed that the rubber membrane on the roof has air pockets under it. I can only guess the glue has come loose. Has anyone else had the same problem.
Jim - I was up scrubbing the roof of my 2006 x139 yesterday and noticed the same thing! 2 saucer sized spots over the door area. Nothing notable inside (at least not in THAT spot!). Did you ever get any insight on this issue? Is it a problem?