Mine too, except that it is a wagon. I have read something about a "parking pawl" or something like that a long time ago. I also have a sound like something is shifting and/or rolling from the shifter area when I turn back and forth. May be related to my front shifter bushing needing to be replaced.

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1987 300TDT - 195,000 (Original #14 head)
1993 190E 2.3 - 105,000
1981 300D - 250,000