Heater/AC operating unit (N23) removal and installation procedure with component identification diagram for Smart 451.3/4 up to 30.8.10.

Service procedure steps and labeled photographs showing heater/AC unit components and removal sequence.

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See all HVAC & Comfort 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.