The fluid got into the connector from a leaking conductor plate. There is a real good chance that your trans control module is full of fluid also. The .6 trans are bad about wicking fluid up the wiring harness. Whether or not this will cause a problem is questionable. Some will claim that the fluid will short out the control unit, I'm not 100% sold on that idea though.
It would be best to get a genuine MB conductor plate though.

I'm glad you figured out your issue.

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Mercedes Benz Master Tech - Retired