This has happened on 2 occasions, 1 while starting the car 1 while driving. Both times the cars volume went to max with either radio or Bluetooth on and produced a static noise with it. The volume knob did not adjust the piercing noise unless set to 0 or mute. This was remedied by pulling the amp fuze and reseting the radio. I had no lights or warnings pop up, and have yet to have this inspected by a dealership. This instant volume switch to max output with static while driving almost caused an accident as I was distracted trying to turn down my radio as quickly as possible with pain in my ears on the interstate. While stationary even after turning down the radio I still have lingering pain from how loud it was. From what I can tell this is something with the radio unit or amp within the car.