Info
Heated windshield in Polo 6R – electrical installation

There are 2 types of heated windscreen – depending on the rearview mirror attachment.
6RU 845 011F NVB–PR-4GX+4L26RU 845 011J NVB–PR-4GX+4L6
PR-Codes:
PR-4GX– Windshield in heat-insulating glass, heatedPR-4L2– Dipping breakaway interior rear view mirrorPR-4L6– Breakaway interior rear view mirror, automatically dimming
Alternator
Each Polo Sedan with heated windscreen has 140A alternator. If windscreen without heating there is 110A alternator. I suppose it is because of huge power consumption of the windscreen. And if switch on the all devices (front+rear heating, headlights, fog lights, seat heaters etc. 110A alternator couldn’t get managed with power consumption on engine idle rpm.
Scheme





source: ciclo’s thread