Thank you Chuck.

I bought this MB in Aug-07 from the Manassas, VA area. Checked the
service records and the Ing Control Unit had been replaced twice in the
recent past. ( 2/6 years ).

The Fuel Pump relay has the numbers ' 85 ' on it. I assume, then it's original.
This device appears clean and w/o any visible corrosion. The sockets it
goes into appear clean. However, on the bottom edge of the relay, there
appears to be some cracked glue or bits of glue that are along the edge
of the case. Maybe this is the problem. It's not fully encased or air-tite ?
Is there a way to test this relay on the car or off the car ?
I will swiftly replace it, if I am convinced it is faulty.
Today the mech is replacing the Fuel Pressure Regulator.
I expect this replacement to 'fix' the stalling issue.

I'll ask him to check the wires for/on the tach.

I'll be baaccckkkk...........

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THANK YOU. CONRAD