All 13 of them apparently got melted when whoever replaced the catalytic convertors didn't replace the heat shield. I cut, and resoldered each one and replaced them.

I'm thinking all of those wires shorting on each other may have destroyed the TCM, but when I disconnect that particular box, the instrument cluster shift readout disappears, and reappears when plugged back in. So it is definitely doing SOMEthing, but it's hard to say if it's working 100%. Is there a way to test the TCM other than looking for specific codes?

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Current cars:
2000 ML55 AMG, 174k miles
2003 C240 T-Modell, 202k miles
1995 S320, 207k Miles