heated steering wheel
My friend has that problem before all was done was JUST SIMPLY CHARGE THE BATTERY TO THE FULEST
I know it sounds funny but, think of this if you don't drive for about 2 hours everyday one way ( school or whatnot ) your battery even though the car starts, is NOT fully charged and computers in this complicated beast WILL shot off ALL of the non essential power gadgets ( including heated wheel )
It took my friend about two days after work (for about 6 hours ea ) with a slow 2 amp charger. He has been OK for about a year now .
Hope that helps