A system for an agricultural machine for displaying machine-specific information and inputting machine-specific commands comprising a programmable electronic control unit (1) comprises a microcontroller having an interface for connection to a bus system (2) belonging to the machine. The control unit (1) further comprises wired or wireless communication means for setting up a wireless or wired communication connection (4) to a mobile computer unit (3), such that the control unit (1) is connected for data exchange to the mobile computer unit (3). The control unit (1) is connected, on one hand, to a tractor control device (5) and other participants (6) of the bus system (2) by means of the machine's bus system (2), and on the other hand to the mobile computer unit (3). The mobile computer unit (3) is used for displaying machine-specific information and inputting machine-specific commands.
