Hello, I have a 2007 Volvo s40 and I’m trying to figure out what it’s wrong with it. We were told it was the fuel tank needing to be cleaned and the fuel pump needing to be cleaned. However, I cannot find the fuel pump. I know it’s in the gas tank technically but how do I gain access? Do I drop the tank? Or is there an easier way? I was told by other sources that it was under the back seat but there isn’t anything there that I can see.