The following project is based on IoT technologies and Global Connectivity Services of Automotive systems. In particular, it is concentrated on Testing and Validation activities directed to the overall features and functionalities that characterize the onboard and offboard connection in vehicles and its related control units. The presented work highlights the difference between manual and automatic testing procedure, implementing a software solution that replaces manual methods reducing cost, time and resources. First of all, the activity of E2E testing and validation is illustrated. It is a manual diagnosis, dedicated on different software versions of the two main control units of Global Connectivity in vehicles, the TCU or Telematic Control Unit and the HU or Head Unit.