Smart Car ForTwo Heater Control Switches Panel HVAC Control Buttons - A 451 820 02 97 OEM HVAC (heating, ventilation, & air conditioning) control unit for Smart Fits Smart ForTwo, model years 2007-2012 Part number A 451 820 02 97 This control panel includes the following controls: Air volume control, Air conditioning switch, Rear window defrost, Air articulation switch, Tempurature control, Air distrubution control Please be sure to check the part number to be sure this is the correct part for your vehicle