Deutz-Fahr Agrotron M 640 ProfiLine Initially considered to be futuristic and radical, the bubble-cab Deutz-Fahr Agrotron is now a well-established member of the global tractor mainstream. Which is not wholly surprising, as the basic Agrotron profile has been on the market for more than a decade. Its latest incarnation, represented here by the 122kW/ 164hp (ECE R24) M 640 model, incorporates a new common-rail engine, four-valve technology and external gas recirculation