How to enter hidden menu in BMW E90 E91 E92 E93 (3 Series service test mode)

Hidden diagnostic menu in BMW 3 Series (E90, E91, E92, E93) hive you access to tests and diagnostic readouts of your car.
Perform needle sweep, LCD and indicator test, check fuel level, battery voltage, board computer data and more interesting information that can be useful when troubleshooting electronic issues with your vehicle.

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