I unlocked my car earlier and opened the rear door for something, and heard the speakers hissing very faintly. I naturally looked to see if the radio was on for some reason, but it wasn't. I locked the car and tried it again, and it did it again.
I then sat in the drivers seat, and locked the car. The hissing stopped just after the hazard switch dimmed. I unlocked it again, and it started again. Is this normal?
Car has RNS-E with Bose