i would make shure you have at least two different sets of lock nuts on them rims. You really cant be too carefull, my neighbours BMW M5 rims where stolen along with the suspension right outside there doorstep and they DID have lock nuts !!
Unless they have Brabus or AMG stamped onto them then they are copies.
AMG normally mark the wheel on the face , either round the nuts at the hum or on one of the spokes. Brabus tend to mark the wheels with the brabus logo on the rim