There is a 3mm allen at the end of the door that must be backed-off to remove that "tumbler"... Most of the time a small rolled split-pin falls out.

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MERCEDES Benz Master Guild Technician (6 TIMES)
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44 years foreign automotive repair
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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