My 1994 E220 Wagon has an annoying rattle that comes from the latch the holds up the folding rear seat back. When the seat is down the rattle is gone. Also, if I reset the seat, the rattle disappears for about a minute and then restarts. I'm pretty sure that the rubber latch is loose and rattles and squeaks when going over bumps. I've tried various strips of foam with varying degrees of success but I just can seem to silence that damn rattle. Any ideas?