To reset the 2015 BMW 3 Series service interval, please follow these instructions:
1. Press the start/stop button once (do not start the engine)
2. Press and hold the Set/Reset button until the service indicator light appears. Press the Set/Reset button repeatedly to scroll the service menu.
3. With the oi change interval highlighted, press and hold the Set/Reset button. When Reset appears, release the Set/Reset button and press and hold again.
4. Reset complete when OK and new mileage appears.
5. Turn the ignition off. Start the engine to verify the indicator has been reset.