The Mercedes-Benz OM612 engine is a straight-5 diesel engine produced by Daimler AG, today Mercedes-Benz.

It was introduced in 1999 for the 2000 model year in a 170 PS (125 kW; 168 hp) version in the W210 E-Class, W211 E-Class, W163 ML-Class, W203 C-Class and W209 CLK-Class in 2000.

Also used in the Austrian built Jeep WG Grand Cherokee (ENF in Jeep catalogues), equivalent to the petrol WJ.

The OM612 DE 30 LA is a 2950 cc version with 231 PS (170 kW; 228 hp), developed by Mercedes-AMG, was used in the C 30 CDI AMG versions of the W203 C-Class and CL203 C SportCoupé.

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