My wife drives a 2005 mini cooper, and she recently havent been able to listen to CDs. Every time we try to put CD in, it displays a "CD error" message. I was wondering if the lens that reads the CDs is dirty and needs to be cleaned, or if the CD playing mechanism is broken? Is it better to get it fixed a mini dealer, or just a regular stereo place? I would really appreciate the help, and input. Thanks in advance.