A8 tech is right. Airbag is 30 and steering wheel nut triple square 12mm. Make sure you have some small torx like 10 or 15; you need them to remove a module to insert the cc switch.
You also need the lower panel that goes behind steering wheel since the 1 on your car now don't have the "hole" for the cruise control switch
Also, as A8 tech said, make sure you have access to vag-com to turn the function on(and to clear falut codes)
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