I had a similar problem yesterday. Thw 240D died pulling out of the garage and wouldn't restart. I couldn't get it to pump fuel with the hand pump...no fuel coming from the tank. Took the line loose from the prefilter and no fuel coming out the line. Blew into the fuel line until the I heard the air bubling into the tank. Let it drain and had good flow...so I put it back together and pumped some fuel into the filter and it started up and I ran it all day today without a problem.
I have tried to get the tank strainer out before, but it is really froze on. It's really a pain getting all the fuel out of the tank also. However, I'm probably going to have to try again before long....my days are probably numbered.