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Hello I may beable to help you.
Please try this procedure.Press and hold the trip button / While doing this, turn the ignition key into the on position / Let go of both, and you will see the words "service reset" on the drivers instrument panel screen / Now press the silver knurled roller switch "OK" on the right side of the steering wheel controls by the menu button. This will confirm the request.
Here is also the procedure http://www.fixya.com/cars/t12114309-reset_service_light_2004_bentley