I think that you need to find the specs for a 104 Standard version.
But absent that, the 103.980 specs would seem (at least to me) to be more relevant than a KAT/lambda car.

Thinking about it last night, pretending it was in my garage with my less than state-of-the-art diagnostics and training:

I am suspicious of your KOEO reading. What happens if you clear the fault, and do KOEO without starting the engine? Does the fault reappear?

What is the current reading at hot idle? I couldn't tell from your first post. I think 11 mA at hot idle could generate a fault of some sort.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe