However, it seemed like sometimes as I was trying to start the engine, with the shut off vacuum line connected, the stop lever would seem to be pulled down slowly with vacuum, if the engine didn't start right away. That is why I tested with the shut off disconnected to prevent shuting off the fuel by accident, when my problem is I'm not getting enough pressure in the first place. But I'm not certain if that was actually happening because one day I just happened to notice that at the very moment the ignition switch is turned off, the STOP lever went all the way to the bottom and as the vacuum released, it came back up on it's own. I don't know if it was gradually going down or just went down each time I turned the ignition switch off, since I'm almost always working alone. I even thought that it was a "safety" measure that Mercedes incorporated to prevent too much fuel from being discharged into the engine cylinder in a NO START situation, which would help to eliminate the "run away" condition because of too much fuel in the cylinders, which is one hell of a scary thing! The car sounded like an AIRPLANE on take off. I just disconnected the fuel at the small fuel pump, after the shock wore off after I just stood there momentarily and looked at this monster AWAKEN and it shut off, eventually with a big CLOUD of white smoke rolling just like in the Smoky Mountains in Tennessee on a foggy, cool, winter morning. The smoke was hanging in the air as if it was alive. I didn't get scared until I went to bed that night and started thinking all of the "WHAT IFS" as I was about to try to go to sleep. And that is why I left the "electrical" control functions questions on the table to find definitive answers to.

About that Alda thing, I'm not that sophisticated, yet, but am willing to check it out, since I've been through everything else.

BenzDiesel