The automotive industry faces tremendous challenges in addressing decarbonization through electrification, developing future solutions for inclusive, safe and affordable mobility. Many of these changes require a radical re-thinking of existing development processes, with the share of software in modern mobility solutions continuously increasing. The rising importance of the software layer results in the so-called software-defined vehicle (SDV). Automotive software will be developed and adapted in continuous cycles. Therefore an abstraction from the underlying hardware needs to be implemented. As a result, the automotive industry is transitioning to an agile software development process. The dramatic increase of software and complexity, along with the advances of international competition in this domain, calls for an approach, in which non-differentiating software is developed jointly as open source. To address these challenges, the EU, together with industry, governments, and research institutions, have launched the European SDV Ecosystem. To turn this into reality, this proposal outlines the vision and activities for a Coordination and Support Action. FEDERATE (Software-Defined Vehicle Support and Coordination Project) aims to bring together all relevant stakeholders to accelerate the development of an SDV Ecosystem, to foster a vibrant European community and orchestrate the SDV R&D&I activities. The consortium of FEDERATE is formed by major European OEMs, automotive tiers, semiconductor companies, relevant industry associations and industrial SDV initiatives, including the Eclipse SDV WG, and supported by a scientific board. FEDERATE will work towards a common understanding on the vision of the SDV program and create an orchestrated advice for current and future projects in the SDV program. In addition, recommendations for future calls are prepared in alignment with a Roadmap and Joint Vision Document for accelerated SDV R&D&I, created as part of the CSA