Soft-top control data flow chart for smart fortwo 451, showing CAN bus communication between instrument cluster, SAM module, relays, motors, and roof microswitches.

Schematic diagram of convertible roof system components and their connections via CAN bus network.

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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.