Yes, well like you I was able to get about a gallon and a 1/2 out with fuel pump initially. thru disconnected fuel line at engine, then pulled the line from tank to pump and only drops came out screen was clean....since theres virtually no free info and questionable pay for info I felt I was only guessing and there could be some M.B. high tech reason for gas not to pour out.Thanks big time to eclass for posting the real benz diagrams and info of fuel system... I have done pretty much the same with fittings on hand however I did also open schrader(s) by hand and propped both sides open with small screwdriver and only got drips...I bought this car halfway thru abandoned accident repairs and have no idea what may have been in the tank in the first place but if opening the schrader lets gas out.... Mines empty...I'll see what the gas gauge says after I get it running...hopefully TODAY!......thanks again for the help!...Cliff