Everytime I make a turn or accelerate or slow down - theres this rolling noise in the back seat area (like a marble on metal surface). Best I can figure is that its near the shelf area and sounds like a nut or bolt that fell off and is rolling around. Its very annoying and I've taken the back seat out and part of the shelf and even went in the trunk to bang around and even used a hanger with magnet to see where it is and tried to grab it - but to no avail and does not make noise when I'm banging around. Does anyone else have or has this problem and can help pin point what this may be and how to best correct it ?? Thx for your help Guys !!!

 

Did you check the area near the spare tire?

Under the rear seat cushions by the belts?