Pop off the gas cap, and you'll see a small oval metal door that the nozzle pushes on when you stick the pump hand in. Press on the flap with your finder until it's all the way up, and listen closely for a click sound. It may sound like it's coming from near the right headlight area. If you are sure you don't hear anything, check fuse E6 next.

 

OK, sorry for the delay... Yes - there is a click and you can even feel the valve opening. I'm guessing if there is no click - the gas won't go in either.