Some ideas -
Two-part epoxy is probably the best choice to reattach the broken pin.
If the remaining pad is thick enough, it may be possible to center-drill the pin & pad to repair it with a thin screw.
If the pin is missing, the same screw could support a bit of vacuum-hose or be wrapped with electical-tape as a substitute.
The wood in one of my 240Ds is so poor, if the above fails, I'd probably just put a screw in from outside.

Happy Motoring, Mark

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DrDKW