Quote:
Originally Posted by mercifiknow
Disclaimer (again): I’m new to Mercedes and mechanics so be gentle :-)
From my previous posts my fuel system is full of trash and I’m not able to take off my gas tank yet. There is a micro fuel pump in the engine bay. I will run the fuel line to my makeshift gas tank and run a little fuel through it and clean the micro fuel pump out with new filters before and after the pump.
But my questions are what is normally in the gas tank (Bosch fuel pump?) and why would they put that micro pump in the engine bay?
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The OEM fuel pump was a mechanical pump, mounted on the left side of the engine block, below and roughly in line with the distributor. It was actuated by an eccentric on the oil pump drive shaft.
The electric(?) pump you have discovered is used as a substitute for the original mechanical pump.