If the tranny on the 190 is like any of the other MB trannies I've seen, the tube goes straight into the lower portion of the tranny and the dipstick goes straight to the pan. The broken tip is most likely laying in the pan and the filter should prevent it from being sucked into the inner workings.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.