I've noticed when the top was down an anoying rattle would come from the boot area. Turns out there is a cross wire support located between the headrests which the top rests on when open. That wire should have a foam cushion wrapped over it. My cushion was completely missing. So, I cut 2 pieces of soft silicon tubing, just long enough for each side of the wire, gave them a slice down one side and slid them on with a dab of adhesive to hold them in place. Rattle gone!