Wrong oil. It needs to be 236.10 or 236.12-236.14

MB 236.10 - Automatic transmission fluids (ATF, Specification 236.10) - Mercedes-Benz Specifications for Operating Fluids

http://bevo.mercedes-benz.com/d/d/en/Spec_231_0.pdf, p13ff

I would correct it before any other steps.

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Prost!