I have an annoying rattling or shuffling sound, coming from around the rear seats, whenever I drive over bumps. I've tracked it down to the split between the two parts of the rear seat. The sound is caused by the fabric of each half of the seat split rubbing against each other. Putting the rear armrest down stops the sound as the fabric isn't in contact any more, but I don't want to leave the arm rest down all the time. Not sure if this could be the rattle you guys are reporting too? Unfortunately, I havnt worked out how to stop the sound more permanently. Any help much appreciated!