Your Bmw M utilizes Condition Based Service maintenance.

The computer system running your Bmw suggests a customized service list based on driving and drivers

CBS is a further development of the Service Interval Indicator System. Sensors and sophisticated algorithms take even more detailed account of the various conditions of vehicle use.
CBS tells us when your car needs service:

•  Engine oil service
• Brakes – front and rear separately
• Brake fluid
• Vehicle check
• Microfilter and Engine Air Filter

Read more about it here.

SERVICE NOTE

BMW utilizes a system of lights on each car which are designed to tell the car owner when services are needed. These lights and this service scheme WILL get the car through the warranty period, but are NOT reliable guides for the long-term health of the vehicle. The BMW Inspection system is a good system, especially when performed on a regular schedule. We strongly recommend more frequent oil changes than the lights will indicate, based on miles driven, and we further recommend Major Services at 15,000 mile or about one year intervals.

Oil Changes—recommended at 7,500 miles with synthetic oil
We reserve time every morning at 8:00 AM for oil changes while you wait! No appointment needed, just come on in.

Inspection I Checklist—recommended at 15,000 mile intervals, alternating with the Inspection II each 15,000 miles
The Inspection I checklist is a detailed look at all of the main systems of your car, as recommended by BMW. The checklist is a complete rundown of the engine, suspension, drivetrain, brake & electrical systems of your car. This checklist is typically performed by the factory along with an oil change and a microfilter replacement. We have separated the oil change from these services for flexibility. The price of this checklist does NOT include the oil change.

Inspection II Checklist—recommended at 30,000 mile intervals, alternating with the Inspection I each 15,000 miles

The Inspection II includes checking over the car from one end to the other: thoroughly checking for items of safety or reliability concern. These include hoses, belts, fluids, lights, horn, charging system and battery, etc. We also lubricate latches and hinges, check brakes, steering, suspension, driveshaft, wheel bearing play, and more—every little detail you would want checked before a trip, before you gave the car to your mother or kids, or simply to maintain your investment in its best possible, most reliable, condition. We have separated the Inspection II checklist from other services to give you greater flexibility. The price of this checklist does NOT include the major tune or the oil change.

Major Tune—recommended at 30,000 mile intervals
Includes replacement of spark plugs, air filter, and fuel filter, checking and replacing any vacuum hoses needed, checking mixture and idle, test driving.

Microfilter Replacement
The climate control system of these cars contains a microfilter designed to remove contaminants from the air before it enters the passenger compartment. When these replaceable filters become quite plugged, they reduce the air volume and hence the efficiency of the heater and air conditioner. We recommend they be replaced at each Inspection or about every year.