From your description, I'd think it's pull the transmission time.

Maybe the shaft has broken inside the case?

On my '84, the speedometer gear is on the output shaft. There is a splined shaft back there and the adaptor for the flex disc is on that shaft.

The clicking when you put it in park is probably the parking pawl clicking on the still spinning shaft.

Best of luck. Please let us know what you find.

If it turns out to be something to do with the flex disc, I'll be amazed that it didnt destroy anything when it let go.

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My first Mercedes Benz. 4/6/07.

1984 190E (201 024) 2.3L four.