A year ago a rattle showed up in the rear of the X. Sounds like a plastic bottle or filter or something, hanging on to one last thread, and 'bobbles' around inside the car cavity with even the slightest road imperfections. Indi Mechanic hears it too, and he's checked all rear suspension, wheel bearings, etc.. We still can't find it.

This weekend I had my wife drive around with me stuffed in back, and I've positively located the body panel area its coming from; Driver's side, cargo area behind the back seat, below the window (it's not in the 'C' post or roof), forward of the left rear mini cargo hatch, and 'above' the lower spare tire/battery well area. Its 'right there' behind the carpeted wheel well dome. I've pulled the back seat and side bolster, and opened the left rear mini cargo hatch, and was able to run my hands aaaallll around the area between the carpet panel and the car's metal wheel well. I can't feel ANYTHING that's loose. Certainly nothing 'big' like the rattling bottle sound I hear. I'm wondering if its between the metal wheel well shell, and the plastic wheel well liner on the outside of the car.

Anyway, I used to have a link to an online BMW technical website that you guys turned me onto. Does anybody have that link? I wanna see what kind of gear might be housed in that area.

Thanks!