From your above post about how the roof is acting it sounds like there may be an issue with the switch. What I would suggest would be to have it tested with an SDS tester to see if there are any relevant fault codes present and go from there. Sometimes just the presence of codes can have an effect on how some systems function. Also it is possible to normalize the sunroof with the SDS as well.

The dealer can do all this as well as some independent shops.

Best of luck, Robert

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Mercedes Benz Master Tech - Retired