A self-propelled harvesting machine, specifically a combine harvesterfeaturingmultiple working units for processing the crop collected from a field, as wellas a driverassistance system for the sensor-assisted control of the working units,wherein the driverassistance system comprises a memory for storing data and a computing unit forprocessingthe data stored in the memory, and wherein an environmental sensor system isprovided forrecording at least one piece of environmental information influencing theharvestingprocess, with a geographic scope located within the surroundings of theharvesting machine.It proposes that a functional system model be stored in the memory for atleast one part ofthe harvesting machine； that the computing unit operates as a parametercontrol systembased on the system model and determines the machine parameters of at leastone workingunit, specifically in an autonomous fashion, and then feeds them to thecorrespondingworking unit； and that the computing unit, when determining the machineparameters,defines or modifies the system model based on at least one piece ofenvironmentalinformation； and/or that the computing unit overlays the parameter controlsystem with acontrol circuit based on at least one piece of environmental information.
