You're right, it doesn't matter. But I wonder how it would be financed and who would be the owner? If the car is pre-registered it must be a dealer or some finance company. Usually it's bought by MB Finance directly from dealer and they are the owner.
Deals are back on the 4 door saloons as they are the ones still in the system. They don't make them anymore so there will be good deals to be had on the remaining few before the w205 c63 replacement comes out.