YES, that 5-speed will fit and it's crazy rare! The only sold them in Euro cars in the early eighties as an option, so finding them here in the states is extremely difficult.

As far as stuff you will need:

Tranny
Pedal cluster
Shifter
Slave Cylinder
All clutch fluid lines
Shifter linkages
Clutch master cylinder

The Navy items are 5-speed specific

You'll need a custom-length driveshaft. You could just take the 240D shaft and have it shortened. The reason you need to do this is that the 5-cylinder in your car pushes the tranny further back than the 4-cylinder in the 240D. This is the same reason that you may need a different transmission crossmember, although IDK what would work or if your 300TD automatic mount might even work. The 240D automatic crossmember works with the 4-speed in a 300D, as the 240D automatic and 300D manual transmissions end up being about the same length.

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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."