Hi there. I have the same problem. did you solve it and how?THX sound problem
In the past week, when I start my (2015) MKC, the sound only comes out of the rear speakers. This happens most of the time, but not always. If you push the steering wheel button to say commands, the usual "Please say a command" is very muffled and barely audible. After about 5-10 minutes, suddenly the front speakers kick in and the sound is normal again. Turn the car off and then restart, and it happens again. Has this happened to anyone else? I want to collect information before I contact the dealer, since with my luck, it won't happen if I leave the car there and I'll waste my time. (I even recorded it happening with my cell phone on video, although I don't know if I captured the audio well.)
I'm thinking it's a problem with the amplifier, but I wanted more input from our community before I go in to ask for repairs.