I've grown pretty frustrated with my "death rattle." Have had car booked at SC twice, each time in part to show them the rattle issue. In both instances, the car was silent with tech in car. I did have an iphone recording of the rattle to show them at my second appointment, but they didn't care. If car isn't making the sound when it's at SC, they disregard it. Since last visit, the sound has come and gone. I really think it's more likely to happen in cooler weather. Really annoying to have this on a newer car!