hi, I've got 1964 W111 220se coupe and I've got couple questions.
My car has fuel injection system that I have never faced before. Fuel pump has red cap with "oil" written on it. Do I have to add oil to fuel pump? if so, how much and what kind of oil?

Tried to pass smog test, but my CO2 is over 10, it has new spark plugs, timing is checked, valve clearances are also good, could someone tell me what else could couse such bad CO parameter? is it time to replace injectors?

thank you