I have a 2013 C-Max Hybrid SEL and the entire audio system wouldn't turn on. The oddest thing was that the last radio station I listened to remained ON at low volume whether the engine was on or not. No entertainment buttons worked at all. I read thru the postings here. This happened at night and luckily had a flashlight on me. I pulled out fuse 79 from the box under the glove compartment. After checking that the inside wire wasn't broken, I put it back in and that fixed the problem. My device was still synched and I didn't have to reset anything. Nothing out of my ordinary daily driving routine had changed. Weird.
