Still haven't looked into this further. Too many customers cars to repair before I can get to my own. I will post once I have more information.

It is likely there are more codes now that it has been driven, will have to recheck later. I have been in contact with iCarsoft and I have to say, they are very helpful, but haven't been able to provide a solution for me. Will see what their engineering department has to say within a few days hopefully.

I checked the 13-pin connector, it looks perfectly fine.

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