Seat backrest cover, foam rubber, and hog ring components on Smart 450/451/452/454 with callout diagram showing plastic rails and seams.

Two figures showing seat backrest assembly with numbered callouts identifying cover, foam, hog ring, plastic rails, and seam locations.

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See all Body & Interior figures for the Fortwo (450), 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.