Radio wiring diagram (1 of 4) showing ground points, USB connector, speaker connectors, CAN bus, and circuit connections for Smart 450/451/452/454.

Radio wiring schematic with labeled connectors, ground points, and circuit paths for Smart vehicles.

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See all Electrical 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.