Odd Static Duty Cycle Readings... Help Please!

[Merkey]

Trying to get Peachy, my 1990 190E 2.6 ready for smog...

I am confused by the STATIC KOEO readings I am getting from the X11 connector on the LH fender.
I will be referencing the "Duty Cycle" Holy Grail at the Landis site here somewhat..
BOSCH KE3-JETRONIC MIXTURE ADJUSTMENT


I will try to explain what I see and reading with pictures as I am really confused whether there is an issue or its me!

Car is a CA and Fed smog complient for 1991 MY according to the underhood sticker with the 16 pin diagnostic port near the battery...



Pushing the button on the Diagnostic for 3 seconds or so gives one flash from the LED... No codes.
Holding the button or doing anything else does nothing... I read on Landis site that holding the button in for longer puts the LED in solid and allows the X11 connector to output duty cycle... it does on my son's(Ps2cho) 1988 300TE, but not with this car.

So, KOEO, I plug in my Craftsman DMM...
I heard that the Craftsman DMM's can read backwards, but for a start..
Red into #3 and Black into #2...
I get a 69.9% reading...



Reversing the leads to the DMM so Black is in #3 and Red in #2, I get 30%..
I am gonna leave it like this for the following tests for clarity...



Now I read on Landis that deflecting the Air Flow Sensor Plate should reduce the reading to 10%...
I get no change..


However..
Moving the throttle linkage a small amout does reduce the reading to 10%.



And cranking the throttle to WOT gives me a 20% reading..



Starting the engine from cold it changes the static reading to 50% while its in Open Loop.



Once the engine drops into closed loop after a few minutes, the reading begins to cycle, and I have it set about 50%... so it varies between 45%/55% at idle and about the same at 2500rpm... so thats good!

so a quick recap..
Now aside from the 30% at KOEO, and no change when the air sensor plate is deflected, the 10% and 20% are correct...

Now it gets confusing....
After the engine was warmed and in closed loop...
I did not touch the ignition key, but stalled the engine by deflecting the Air Sensor Plate... the engine stopped, and I was back in KOEO... but now I am reading 70%!


I deflected the Plate more... and I hear a click from the battery area which I assume is the MASS, and the reading drops to !0%!



Now I move the throttle linkage... and I get no change from 70% at either throttle opening.

I go and turn off the ignition and turn it back on again...
Now its changed again...
KOEO I get 50%...



Deflecting the Air Plate I get 40%..



Moving the Throttle off idle I get 10%..



And WOT I get 20% again...