I have an intermittent rattle coming from behind the nav screen. Occurs at completely random times. Sometimes its after 2 hours of driving, other times it as soon as i pull away. It can also be on smooth or rough roads. I have removed the nav screen and have been driving around without it to try and isolate the rattle but it's difficult to see when it's dark outside. I will try again tomorrow but Im just wondering if anyone else has experienced a similar issue?