I have noticed over the last few weeks a rather annoying rattle coming from the boot area on the drivers side. More noticeable going over uneven road surfaces and stopping. Took into BMW today who want £140 for an hours investigating to try and find the problem, and obviously further money for the fix. Have looked online and the common feeling is either the roof mechanism or a suspension issue. Has anyone had this issue and been able to fix it? If so, how much did it cost you? The noise only happens when the roof is up.