So I have 2008 S model and this story begins when I was dropping food off at my friends appt and left my car with the windows down, hazard lights on for a couple mins. When I come back and start the car up the was a constant "beep beep" coming from the stereo unit that was unlike any sound it's made before. Nothing I could do made it stop I put the key in the ignition (convenience package), turned the car off, got out locked the doors, rolled the windows up, popped the trunk, and numerous combinations of the above. It beeped all the way home and I got out locked the car to go inside and could hear it still beeping as I came in. Car operated perfectly normal and there were no warning lights on; I looked online and have found other people having beeps but didn't find anything for a constant one like this. Anyone have some wisdom for this matter??
Thanks!