Seat belt system components and fastening procedure for Smart Fortwo 451, showing inertia reel, guide, tongue, buckle, and release button.

Diagram of seat belt assembly with five numbered callouts identifying inertia reel, belt guide, belt tongue, buckle, and release button.

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See all Body & Interior figures for the Fortwo (451), or browse the full figure library. Part numbers and callouts are community-sourced and cross-referenced against the manuals — confirm with your VIN before ordering.