I had a similar problem with my CCC (I have E92 2008); the CCC would freeze all the time, sometime I would need to restart the vehicle to have the system working. Sometimes the screen would turn completely black. It was horrible. From what I read, CCC seems to be unreliable and outdated system. I tried to fight it for a few months, and then I decided to scrap it and update it to CIC (the newer version of nav). Did not install it yet, but can tell you how it is after I do the installation.
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