[W126 Coupe] Fuel Leak

[Henry Viveiros]

My wife's 1986 560 SEC has a fuel leak where a black plastic device is
attached to the fuel distributor (the metal piece that has 8 lines going to
the cylinders). The Fuel distributor ( ? ) is a remanufactured Bosch that
has a tag 0438 101 018, and the plastic piece with an electrical connection
has a cast-on number -2437020007. There is a leak where the plastic piece
mounts to the side of the fuel distributor with 2 screws. There doesn't seem
to be a gasket, and the screws are tight (I don't want to ruin it by over
tightening). There is fuel under pressure at that connection.

Anyone have any idea what I should do. Do I replace the plastic thing or
what?
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