Radiator unit removal and installation for 454.0 models with air conditioning system, showing coolant hoses and refrigerant lines.

Engine bay diagram showing radiator location, coolant hoses, and refrigerant line connections on Smart 454 model.

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See all HVAC & Comfort 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.