It's totally doable. Slightly larger in size but should mount the same and fit. You'll need the tank and the hoses to connect the tank and you'll have to Fabricate a bracket to mount the tank. zyrex g-05 coolant is the stuff.

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Current fleet
2006 E320 CDI
1992 300D - 5speed manual swapped

former members
1984 300D "Blues Mobile"

1978 300CD "El Toro"