Gas sensor drops to empty on a Mercedes C320

Question

Everytime I pass through a certain area by my work, the gas needle in my car drops to the bottom. Then sometimes when I pass through again at some point it jumps back to normal. I heard I can reset fuse #5 and just wondered...where is that?

Answer 1

The same thing happens to my 2003 C230. The needle always drops after I gas up, but when I restart it, it goes back up. Im not sure where the fuse is though. Im taking it to the dealership next week.