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Autonomous cars already exist, why should anybody these days spend manual time on mesh preparation? This is a task for a machine, not for a human being. This paper shows a one-click way to prepare the mesh for multi-bodies or complex topological objects for CAX application and how to obtain autonomously suitable data cleaning and output qualities of complex multi object geometries. The underlying software is already in use for data cleaning, surface mesh generation and 3D mesh generation: here it prepares a body in white (BIW) starting from a CAD geometry to surface mesh, including data cleaning fully automatically with 5-8 hours computational time on a desktop machine, while requiring less than 15 minutes of manual work. Firstly, during the import process the object gets subdivided and differentiates each part as sheet or solid. Each of these parts are moved to the global coordinate system. The user can review if the input data is the correct one.