Just wondering if anyone else has experienced this issue and if they fixed without taking to dealer. I had taken a few ripped cd's and a purchased CD and downloaded to the HDD the other night and worked great, last night I tried again and every CD I had tried, I would get a reading error? Thanks for any help, new to the forum and new to Cadillac ownership purchased a used 2008 CTS4 low mileage car and love it.