I've fitted a GTI wheel into my 'normal' Golf without issues (just had to use VCDS to enable the new DSG shifters). If the stock wheel in your car is the same as the stock wheel for Golf's then I dare say you'd be ok. Not being familiar with the CC I wouldn't know if th eairbag is the same but I can tell you mine was a different shape.
Have a look through this thread: Flappy paddles steering wheel in Tiguan.
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