Can you verify the pin by the wire color going into it? Per the diagram it should be blk/wht, but obviously it should be whatever color is at coil 2.
At this point I think once you verify your wiring is good, you're looking at the engine module, which probably means shop scan or swapout to confirm.
Crumbling harness on a replaced harness would be a big surprise.

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Prost!

I got sidetracked here for a couple of weeks but I'm back. I just measured the resistance of all three coils. Two of them are a year or two old and the third is brand new. All three coils measure 9.4Kohms (using a Fluke 88).

Can anyone answer how I'm getting 12 volts at the low voltage side of coil #3 but the plug isn't getting any power? I don't understand that one. The only thing in the way of the 12 volt supply and the plug, is the coil - and that's brand new. What is my next logical step?

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Remember, Bad Decisions Make For Good Stories

There are 3 measurements possible between 3 terminals of each coil, and you are only listing one.

The spark is triggered on the secondary (plug) side of the coil, when the ground is interrupted on the primary (low voltage) side.

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2004 E500 4Matic 138,000 miles

I hate these threads with NO resolution!!

The resolution was that he probably got rid of the car.

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1990 190E 3.0L