Quote:
Originally Posted by Captain Scott
OK, I think I need some more skooling. My car is a 1974 107, the mechanical FI kind. I did test it and the pressure began to fall off as soon as she was shut off. In a few minutes, it fell a few pounds and kept going to zero eventually.
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Either your year is incorrect or your assessment of your fuel system is. MB used D-Jet through 75 and 76 was the changeover year.
Either way, your fuel pump's check valve sounds at fault.