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Electronic systems in vehicles characteristically consist of several distributed electronic control units (ECUs) from different suppliers. This situation hinders the integration of automotive systems and increases the overall costs due to individual solutions coming from each supplier. In order to get rid of these disadvantages, the French-German project OSEK/VDX was founded and is now drawing attention worldwide. OSEK/VDX worked out a respective specification to standardize services and protocols of communication, network management and a real-time operating system. An overview of the current state of OSEK/VDX including specifications and harmonization process with ISO is given. Furthermore a description of the Modistarc project working on methodologies and tools for conformance testing of commercial OSEK/VDX implementations is contained.