I'm sure rattles are part of the deal with the Disco Sports. It's a reminder of the LR heritage, a farm vehicle! JLR wanted to cut out my B pillars, pull out the interior lining, and re-weld them back again and re-spray, no thanks! After three years something must have fallen off because it's now quieter from that quarter and I'm looking for a spare bolt or screw on the floor. Now the dash rattles on anything but a mirror surface. You will find that because of the amount of plastic used, rattles and ticks transfer from all locations. For ages it sounded like my rear or front passenger doors weren't closed. I keep some tools under the spare wheel and had to insulate the whole cavity with 12mm thick rubber foam and that fixed it. A tick in the drivers door came from the pull ring of a fire extinguisher in the boot. Its worth taking absolutely everything out of the car, see if it still rattles and gradually replace items to see what sets of the rattles.