2010 Hyundai Sonata Owner's Manual - Page 91

1FEATURES OF YOUR HYUNDAI 78 B510D01HP-AAT DAY/NIGHT INSIDE REARVIEW MIRROR B520A01A-AAT OUTSIDE REARVIEW MIRROR HEATER With Manual A/C Manual Type ONF048072 With Automatic A/C B520A01NF ONF048071N The outside rearview mirror heater is actuated in connection with the rear window defroster. To heat the outside rearview mirror glass, push in the switch for the rear window defroster. The rearview mirror glass will be heated for defrosting or defogging and will give you improved rear vision in inclement weather conditions. Push the switch again to turn the heater off. The outside rearview mirror heater automatically turns itself off after 20 minutes. Your Hyundai is equipped with a day/night inside rearview mirror. The "night" position is selected by flipping the tab at the bottom of the mirror toward you. In the "night" position, the glare of headlights of cars behind you is reduced.