Current literature provides many studies on the mechatronic design process. However, theyonly focus on one level of the design V-cycle. This study deals with the entire downwardside of the cycle in view to processing it globally. To achieve this, we propose a hybridmethodology based on several tools, languages and methodologies such as SADT, SysML,Modelica and CATIA Systems®. The method was validated successfully in aModelica/Dymola framework. It is now possible to partially automate the process.