When the CCC starts to get slow, it's often a sign that either your battery is low, or your alternator is not putting out enough voltage. I'd have both checked. If the car's battery is more than 2 years old, it would certainly be suspect.

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2014 BMW 328i Xdrive
2011 BMW 335i M-Sport
2008 BMW X5 4.8i Sport
2000 BMW 528i 5sp