bmw sedan 3d model

BMW 520i sedan car, simplified exterior shell only, no interior, no wheels, no separate parts, single solid object windows fully solid and filled, no transparent parts, no hollow sections, fully watertight mesh, manifold and closed volume, clean topology, no intersecting geometry optimized for FDM 3D printing, thick and sturdy structure, minimum wall thickness above 1.2mm, no thin parts, no small details, no tiny gaps smooth simplified surfaces, low to medium polygon count, no textures, no high detail, no logos, no small features flat bottom surface for stable bed adhesion, simplified undercarriage, no cavities, no recessed areas, no internal structures all geometry self-supporting, no steep overhangs, sloped surfaces instead of flat horizontal overhangs, printable without supports compact, clean, print-ready model