How to unlock hidden menu in BMW E38 & Range Rover OBC (on-board computer service mode)

Hidden menu (service mode) in BMW 7-series (E38) & Range Rover III (2002-2004) on-board computer gives you access to coolant temperature, fuel consumption, battery voltage, oil temperature and menu more useful information. You can also trigger test modes for gauges (speedometer needle sweep and cluster bulb test), chime and adjust the average fuel economy readout.
Simply turn on the ignition, press and hold button on the right of dashboard OBC, enter TEST NR. 1 and add up 6 digits (this is part of your VIN), then navigate to TEST NR. 19 and enter summed number. After you confirm the value, you have full access to this hidden factory mode.

Full description available at http://mr-fix.info/bmw-e38-obc-hidden...

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