You clearly have a problem with either the sending unit, wiring, or gauge cluster. The problem is the fuel level indication, not the fuel pump, or air/fuel ratio, or fuel filter, none of which have anything to do with the fuel level indication.

Just fill it up, reset the trip odo, and don't drive more than 400 miles (or 350, or 300, or whatever you pick) as a limit before you fill it again.

Or put a can of fuel in the luggage compartment.

And then take it to a shop to get it fixed.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
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