As Army said, check the hinges and the support structure for them. I haven't seen them escape this problem undamaged.

Here is a pic of an '87 300SDL that suffered the same fate. Not only did it damage the sunroof, but the roof around it. My indie is cobbling this together for one of his customers in his spare time. The car is yellow, and now, with a brown hood. It's not a quick task.

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Chief

1991 350SD