The Mercedes-Benz OM640 engine is a 2.0 liter inline-four cylinder diesel engine manufactured by the Mercedes-Benz division of Daimler AG.
[1] The OM640 is the basis for the Thielert Centurion 2.0 aircraft engine.
Also used as the basis for the Austro Engine AE-300/330 aircraft engine in Diamond DA-42 and DA-62 aircraft.
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