ctuna, thanks very much for the info. I tried to code those two values to nicht_aktiv, but it didn't disable the error warning. I haven't yet tried to remove 612 from the VO.
I'm thinking, if I don't anticipate getting any dealer-flashed software updates, diagnostics, etc, and don't plan on reconnecting my MOST radio, I could go to the MOST distribution block and shift the cables that go to the radio to the unused block. In theory, that would re-establish the MOST loop and eliminate the errors, right?