Me too. Power slider is a way more desirable option than rear defrost for mePower slide removed rear defrost on mine.
That's for the heated mirror...The rear defrost button is right above the temperture control slides on my ac/heater controls. Works great on rear power slider.
Can you see the heating element wires on your back window? I have the same button, but all it does is heat my mirrors.The button operates the heated mirrors ( if equipped) and rear defroster
the following is afrom my 2009 owners manual pg. 172:
Rear Window Features-
The rear window defroster button is located on the climate control panel. Press this button to turn on the rear window defroster and the heated outside mirrors ( if equipped). An indicator in the button will illiminate when the rear window defroster is on....