At the end of 2009, new models were introduced to the Agrotron M series. The M 410 and 420 were the series' first four-cylinder models. In terms of power, they were positioned above the smallest six-cylinder model. New additions also included the M 615 and 625, which were six-cylinder models equipped with four-valve technology and, according to their model designations, were positioned in terms of power between the two-valve models. The two-valve models received a slight increase in torque. The control armrest was updated in both the basic and Profiline models. There were still 24+24 gears, and the Profiline models featured quick shift automation. DF still did not specify noise levels for the cabins by model, but a noise level of 70-73 dB was now reported for the M series.

The Agrotron 6100 series models replaced the M series in autumn 2012. For markets with lower emission requirements, production of models 600, 615, 620, and 650 continued.

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