i have the kenwood KDC-MP225. it is NOT the stock one the mp3 came with. My problem is that when my car is not running and only the stereo is on, it wnt play cds over volume 18, it just keeps shutting the stereo off and on repeatedly until i switch to radio or turn the volume down low. But when the car is actually running, stereo is all fine. Any ideas here? Stereo goin bad? Car battery goin bad? thanks