Reset procedure using the Reset Mode (possible from 9/99 onward for E46, MY2001 E52)
- Ignition key must be off
- Press and hold the trip odometer button in the instrument cluster (left button), and turn the ignition key to the FIRST position.
- Keep the button pressed for approximately 5 seconds until one of the following Words appear in the display: "OIL SERVICE" or "INSPECTION" with "reset". (E39 is slightly different)
- Release the button and press and hold it again until "reset" begins to flash, release the button.
- While the display is flashing, press the left button briefly to reset the service interval, the following will appear: "END SIA".
The system can only be reset again after 10L (2.5 gal) of fuel have been consumed.
