Trust me everyone on here will be able to confirm that you must get a running in service done at 1200 miles.
The BMW dealer should have told you as its essential.
From memory the diff, engine and maybe the gearbox oils are fitted with specific running in oil that must be replaced by a maximum of 1200miles.
The rear diff has 1M only oil so its worth notifying the dealership a week in advance so they can order it in for you.
Im sure if you do a search there is alot of info on here that will confirm it.
"Awaits a hundred people confirming the above" lol