Bayerische Motoren Werke E39
OBC Procedures
Reset Oil/Inspection: Hold odometer reset button with key off. Keep button held while turning key to position 1. Release when you see Reset or Re SIA. Press and hold the reset button again until the display flashes. Release and press the button again and End SIA should be displayed shortly.If the minimum fuel consumption or time has not been reached, you may not be able to reset the Service Indicator. Change °C/°F: Turn key to position 1, press and hold odometer reset button, turn key off. Unlock the OBC: Hold the right tachometer button until you see "TEST-NR. 01" in the display. Press and release it twice more to display "TEST-NR. 03" then press the odometer reset button on the left. This should display "LOCK: ON" or the "SI-L: ????". If it is indeed locked, sum the last 5 digits of the VIN number and input this number by pressing the odometer reset button until the desired number is reached. Once the number is correct, press the right button to unlock then press it again until you get to test 03. Press the reset button there and you should see the "SI-L: ????". Considerably more information about this whole process is at Ideaphile's E39 OBC page.