I've used these on benzs for years. Precision Fuel Pumps E16087 - Electric Fuel Pump | O'Reilly Auto Parts

Pass through when not on and easily available any where. Part e16087. My 2000 Chevy 6.5 diesel uses same pump as oem lift pump but it has screw fittings

You can just put it under the hood and jumper it to the battery when you need it. Or wire it up to the ignition.

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What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius