BMW Onboard Computer (OBC) Functions
BMW X5 - Access the Hidden Onboard Computer (OBC) Functions Summary: X5 dash cluster can display show some onboard computer system valves but more fun to explore than provide any real information that action can be taken on. The dash cluster (speedometer, RPM, etc display) can be used to view some of the BMW X5's onboard computer (OBC) data. To access OBC data: You will need the vehicle identification number (VIN), your ignition key and a pad of paper if you wish to record any displayed data. There are two buttons associated with the dash cluster: the one on the left resets trip mileage and one on the right is only used to access OBC data. Push in and hold the button on the right and then insert the key into the ignition and move the key to position 1. Do no start the X5. The cluster display will now show "Test NR 1." Release the right button. Each Test Number (Nr) can have multiple sub displays, which you access by depressing and releasing the re...