What does "turn the car on and turn start the car ..." mean ??
Turn the key to on and turn the key to start.. turn on ignition... But it has spark and no gas..

Okay.
The pressure is remaining the same at all key positions: off, on, start. It runs until gas is gone: 2 seconds..

I just drained all of the pressure using the pressure kit.. And did the test over.. All 3 positions: no pressure... and no run this time...

What do you think is going on? Im not experienced with MB's. But Im willing to learn. Im taking off work tomorrow and hopefully fix this (while the MB parts shop is still open). So, what are your recommendations...