I bought my car used about two years ago in 2019 for my birthday. That has happened to me twice! Once earlier this year and again a few days ago. Scared me to death!!! I pulled over to get my bearings. The last time I held the volume down on the steering wheel and it worked for a while and them the volume went back up. I tried to turn the thing off and it wouldn't. All of this was going on just as I was entering the freeway. Talk about ANGRY! What is the problem with this vehicle? 2013 MKZ
FCIM as stated in this thread.