Remove/install ATA alarm signal siren on 454.0 with CODE (V40) alarm system, showing connector, carrier, bracket, and horn assembly locations.

Service procedure diagram for alarm signal horn removal and installation on Smart 454 chassis with numbered callouts and detail views.

View full-size image ↗

See all Electrical figures for the Fortwo / Forfour (453), 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.