SAM control unit rear view with integrated fuse and relay box, Model Series 451 smart fortwo electrical system.

Rear view of SAM control unit showing fuses, relays, and connector terminals for smart fortwo 451.

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See all Electrical 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.