Quote:
Originally Posted by Benz Mondi
Unless you are so confident that you've fixed the issues with the MAS, that you are willing to go through all the trouble with draining the fuel and fiddling around with the fuel pump system, I would first get another matching MAS and see what happens. They are not expensive as a good, used, with warranty part. It's also good to have another one for the in-car emergency fix kit anyway, since a bad one will strand you. Remember these parts are over 25 years old now.
For my 90 300E, my MAS went out and my a/c clutch wouldn't engage. Spent $30 for a matching one and all was cold again. It even had a more stable idle!
Good luck.
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Been there, done that. I found a bad primary pump, and just got finished draining the tank. I will probably replace the hose and filter while the tank is empty. I did use the hose pinch method to start with while I hooked up a hose to drain the gas into containers. I am off to the wrecking yard after lunch to get another pump. I will bring a cordless tool battery to check it while I am there. The pump off of my wrecked 280E was a little larger in diameter, so it will not work....Rich