Heater/ventilation operating unit removal and installation procedure for Smart 454 chassis with numbered callouts and step-by-step instructions.

Service manual page showing heater unit removal steps with dashboard photos and detailed component callouts

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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.