Cut-open fuel tank assembly view showing internal components and union nut location for chassis 450, 451, 452, 454.

Exploded view diagram of Smart fuel tank module with filler neck and internal structure visible.

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See all Powertrain 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.