To my understanding and from some of the maintenance manuals,The external fuel filter is no longer located on underside of chassis. It is now an intergral par t of the fuel tank. I,m questioning where in the tank is all the sediment accumulating from the hundreths and hundredths of gallons of fueled that is pumped into the tank during the lifetime of the car and how is this accumulation of sediment removed. Thanks, Cags