Wow, I have that feature too. I missed it when I looked through those menus.
I'll try it on a ski day or bad weather trip.

 

I figured all trims have it since the wipers are nicely tucked in below the hood line for a clean look but you can't prop up the wipers unless they move up a bit. I've never propped mine up since in winter park mode they are well within the heating area of the windshield.

 

yea winter mode works great. Im interested once GAP IID decodes the L462 if next time my windshield breaks I can swap it out. and replace the AC panel with the Heated version and VOILA. BUT have to wait until GAP decodes it fully. I had a heated windshield on my Range Rover and it was useless in Florida BUT MAN did I need it for Texas and Colorado.