[etr2016]

I've had this issue intermittently, but I was thinking that it was from using the AUX jack (it took me 1.5 years of ownership to realize the car had a USB port! In my defense, I have no idea why BMW put a trap door to hide the plug). Anyway, while having my phone connected through the USB and playing music for about 45 minutes (relatively loud), the sound just stops. the radio operates, but there is just no sound. I turn it off for a bit and then its fine. The dealer previously mentioned that the car threw a code for an over heated amp. At least I think that's what they said as the last time this came up was about a year ago. Anyone ever have this? I'm debating replacing the amp.

Thanks