Caterpillar Energy Solutions GmbH, is a mechanical engineering company based in Mannheim, Baden-Württemberg, Germany.

The construction of diesel engines in particular used to be the core business of MWM, amongst others for utility vehicles and agricultural machines.

For quite a long time, combines by Claas, tractors by the French manufacturer Renault, and by the German companies Fendt, Lanz, Bautz, Holder and Ritscher, were equipped with MWM engines.

[8] Today, Caterpillar Energy Solutions offers mainly gas engines for cogeneration units and biogas plants.

[10][8] Subject to the consent of prudential authorities MWM will then become part of Caterpillar's Electric Power Division.