The relevance of automation in agricultural engineering is getting stronger. As well as machinery guidance of single machines is state of the art, the automation in agricultural processing is gaining in importance, as to be seen on the innovation products introduced during the 2009 Agritechnica. Until now the primary focus of automation is set up on single machines, but the automation of cooperative operations is lying idle. For example, a combine harvester and the logistic chain of transportation units are operating cooperatively. But the logistic decisions are still made upon first hand experience and - without any rating - human intuition. Therefore the benefit of the whole agricultural - e.g. harvesting - process may be linked to the condition of each human participant. Beside the automation of single operating machinery the optimization of cooperating machinery and agricultural processes may be one future challenge, the agricultural engineering has to meet in the next years. Concerning the synergies, the vision of field robotics is an integral part of cooperative operating machinery. With the experience of the last four Field Robot Events and the knowledge of different research projects the ILF has developed a mobile platform for developing, testing and demonstrating cooperating mobile machinery strategies. First objective of the development process was to realize a flexible hardware concept including chassis as well as computing and sensor hardware. As a next step a new middleware has been set up, to establish a specified access to sensor and actuator data and to facilitate the data processing and data distribution via Matlab/SIMULINK or other software projects like Visual C++. In a first project the platform is used for demonstrating two scenarios of cooperating machine behaviour. First scenario is the interaction between a forage harvester and a transportation unit and second scenario between a combine harvester and a transportation unit.