Hyundai Elantra: Outside rearview mirror defroster (if equipped) - Rear window defroster - Defroster - Features of your vehicle - Hyundai Elantra MD 2010-2015 Owners manualHyundai Elantra: Outside rearview mirror defroster (if equipped)

If your vehicle is equipped with the outside rearview mirror defrosters, they will operate at the same time you turn on the rear window defroster.