I almost forgot about this post!

To recap I ended up going to Pepboys and bought an electric fuel pump they had it in there parts catalog for my car.

It worked totally fine, when I returned home I ordered the parts to rebuild mechanical fuel pump. Which was a breeze, it had none of the crimped valves seen in other threads.

Just want to thank everyone on here for there sage advice on the thumbs up for going with the electric fuel pump.

The fuel system is back to stock now.

What happened was one of the valves was totally destroyed and was not holding pressure, anecdotally I was having signs of this problem before complete failure happened. But I was unable to diagnose it at the time. The symptom was a drop in RPM's at idle speed.

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'84 190D 2.2 OM601.911 144K