OM906

Mercedes-Benz produced a full line of single, two, three, straight-4 -5 and -6, V4, V6, V8, V10, V12, V16, and V20 engines and even Wankel engine.

All Mercedes-Benz V6/V8 engines are manufactured in Stuttgart-Bad Cannstatt, Germany. The 4-cylinder versions (M266, M266 Turbo and M271) are assembled in Stuttgart-Untertürkheim. The V12 engine plant is in Berlin.

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Wikipedia