Fuel filter O-ring

[toddyvol]

Tomorrow I plan on changing bolt fuel filters for the first time since I've owned the car.(6 months)

Every morning when I start the car I've had a slight miss until the car is warmed up. I've let the glow plugs glow two glow cycles but that has not fixed the problem. I have replaced and reamed all glow plugs with new Bosch glow plugs since I had no idea how old the were. The rest of the day, at lunch for example, car starts and runs beautifully. Just the miss in the morning after it has sat over night.

I now suspect air in the lines. I have noticed a slight sheen of diesel fuel on to of the spin on filter housing. I have tried to tighten the bolt up and feel that has helped some but still have the miss.

The O-ring or washer on the fuel filter bolt may be the problem. The other fuel lines look okay. Cigar hose is not a cigar hose, It's just a 5/16 fuel line. No other signs of a fuel leaking. The primer pump is brand new too. It leaked badly when I bought the car.

Does my '82 300D have both a copper washer and a rubber o-ring on the fuel filter bolt? And if so is there a specific size for both?

Sorry for the long post.