Fuel level sensor(s)

[RenaissanceMan]

Just filled up my 3.0's at the pump last night and now my fuel gauge is 'stuck' on 1/4 tank with the low fuel light on, as well. I was looking at the tank and related components on realoem and noticed that it looks like there is a float attached to the fuel pump assembly, as well. Am I correct in assuming that there are 2 fuel level sensors on my X5? Is one associated with the gauge and one with the low fuel light? I'm also assuming that the OBC gets its info from these sensors, as well, as it's telling me I only have 6 miles to go before empty. Last question: Can you access the pump and senders from under the rear seat?

Thanks, y'all-