My GLI has heated side mirrors, but to turn them on I have to turn the adjustment knob to the "heat" position. It has the other standard selections of L, off, and R on the same knob for selecting which mirror you would like to adjust, and on some models a 5th position exists for power fold in. Why does VW make you select heat this way? Every other vehicle I've ever owned puts the mirror heat on the same circuit as the rear defroster so it's one button push for everything. I have to keep the knob on the "R" position if I want the right mirror to tilt down in reverse, so if I ever want mirror heat I need to remember to switch it back to "R" after the snow and ice is melted. Just curious if I'm missing the reason as to why having a separate control is advantageous.