3D Model: Generate A Realistic 3D Model Of The Audi A6 2012, Showcasing Its Executive Sedan Styling And Refined Proportions. At The Front, Include The Signature Single-frame Hexagonal Grille With Chrome Borders, Angular Bi-xenon Headlights With LED DRLs, And Sculpted Bumper Intakes. Model The Long Hood With Subtle Contour Lines And A Slightly Sloped Roofline Flowing Into The Rear. Side Profile Should Feature Clean Body Lines, Chrome Window Trim, And Five-spoke Alloy Wheels. The Rear Must Include Wrap-around LED Tail Lights, Dual Chrome Exhaust Tips, And A Subtle Integrated Trunk Lip Spoiler. Ensure Accurate Proportions, Clean Geometry, And Realistic Textures With PBR Materials Including Metallic Paint, Glass, Rubber, And Chrome. Ideal For Visualization, Animation, And Real-time Use.