MJScore

I just bought a used 2009 C350 w/ Harmon Kardon Comand system in it. The display is not working(it comes up but the screen is black) and the CD player won't load. With no screen, I can't set up my Bluetooth phone. Has anyone had the repaired? If so about how much was it? I talked with one Mercedes repair shop and they quoted me around $1300 just for the display unit. I would like to stay with the factory system but if it is to expensive I might have to see about aftermarket. I've searched here and googled about aftermarket stereo replacement but have not seen pics of any installed units. My local stereo dealer has not done any. If anyone near the Bay area here in California has any recommendations for a stereo shop, I would appreciate it.