Radio wiring diagram part 2 of 3 showing connector circuits and signal routing for Smart 450/451/452/454 models.

Wiring diagram with numbered columns, connector details U16/U19/N4/N6, and circuit lines labeled A21/1 and A21/1 A22/1.

View full-size image ↗

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.