Hi all. New to this forum & looking for some help. So, I have a 2010 A6 sline with mmi nav ( the one with the disc changer and dvd unit in the glove box ). I can be driving along for 5 minutes or 20 minutes and the screen, sound and the red lights on the control panel all go off. If I turn off the ignition and restart the car it all works again until it decides to randomly go off. This can happen at any point on a journey ( it's never within the same time frame). I've also sat stationary with the ignition on but engine not running and this still happens. Anyone else had this or know of anything to try?