Do a google search. "They" have a mercedes based diesel aviation powerplant. All I remember is FADEC controls.

I love PA-28-140's. You can get them pretty cheap. Fuel prices will kill general aviation. Enjoy it while you can.

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08 R320 CDI current

Past
95 E420
87 300D Turbo 5spd
90 300TE
83 300SD
85 300TD
92 400E
85 190D