Stop lamp actuation function chart showing brake light switch, SAM control unit, and stop lamp wiring for 451/452/454 chassis.

Wiring diagram of stop lamp system with brake switch, CAN bus, SAM module, and three stop lamps on vehicle rear.

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See all Chassis 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.