As you may know, the fuel level sensor is not connected to the M800 PNP. So you should be able to wire this sensor into the ADL. If it is a resistive sensor then you will need to measure the resistance with different fuel levels and use an AT input into the ADL with the appropriate input calibration... If it is a varaiable voltage sensor then you will use an AV input... you will need a wiring diagram of the car and multimeter... hope this helps