NBTBRV8 there is no such thing as inspection 1 and 2 for the E92 M3. Its called condition based servicing...
why the hell would you change plugs at 30,000kms? What does the car say you should do in the vehicle status on the iDrive? Do you even know ur car has an iDrive system?
All you need at 30,000 is oil change, brake fluid and thats it! maybe air filter if you can be bothered.
Gearbox fluid doesnt need to be done til ages and spark plus dont need to be changed until around 60,000kms.