I need to replace at least one of my fuel pumps on a 1995 E320 wagon. I have replaced the fuel filter, so I know of the pump underneath in the rear seat area. The mystery is where the second pump is located and is it the same pump (part #) as the pump located by the fuel filter. I have heard rumors of being by the fuel tank to as far fetched as being "in" the fuel tank....

Please help.....