Originally Posted by forceflow2
This just happened to me and I sent an email to my dealer about it already, but I wanted to see if anyone might have some idea or have experienced it before. I'm just going to copy the email I sent as it's pretty detailed, but somewhat long. I'll had a tl;dr at the end though.
tl;dr: Unlocked the car, began making an extremely loud rumbling noise and shook. Opened the door and realized it was the speakers making the noise even though the radio wasn't on. It wasn't even playing music, it was just a rumbling static sound. Sound stopped by itself after a couple of minutes, after which the car cranked just fine.
I'm positive that has happened to another member, if you have the MFT system.