Congrats on your new car. You made the right choice ! M3 V8 is already a ///M legend with its super design and epic engine (last n/a ///M engine)
Carbon Roof is a great choice.
As for the first service, I just got mine done a few weeks ago.
They make the oil service, brake fluid, and differential oil services. Some people also had experienced a transmission fluid service, but a number of them had problems. My dealer did not apply a transmission service to my car.
And please find a trustful dealer to take your car to service