Hi Jim - Just bought an x320 also last month. Yes it's hard to see the fuel line. Interesting though,,,,because you can pull on the closed fuel tank cap and the tank rocks just enough that you can see the fuel move in the tank. I checked the other x320's at the dealer and they move slightly also. I think it was intended that way. I can't see the fuel either - but moving the tank lets me see where the fuel is.