Glenn,
Already have a 5 speed manual tranny in my 230SL.
Mated with the 1985 190D 2.2L diesel motor, both came from the same car.
There are a lot of modifications to be made, but I do not know if the bell housing will mate up with the original motor. I highly doubt that it will fit.
Happy Pagodalidays to Everyone!
Walter Klatt
1967 220SL-diesel