[Jplath]

Hi all, I have a 2014 BMW 535i m sport. The sound stopped working I checked the fuses replaced the amplifier and still no sound. My car sat for a week while we were on vacation, I started the car and I had sound, sterio worked, warning chimes worked and I had communication to my cluster again. Everything worked perfectly for a week then the sterio started cutting out now it stopped working again I'm absolutely stumped. Could this be the head unit itself? Also my nav does work but doesn't show up in the cluster anymore.