I have a 2004 Polo Twist 1.4 16v which came with heated / electric mirrors, but not heated windscreen washer jets, only available on a 'Winter Pack' I think. Is there any way to retrofit heated washer jets on the polo. I understand the car has a distributed CAN BUS system, would it be necessary to have the car configured to use the extra electrical components, as this would seem to be the case with most CAN systems? Any clues would be appreciated. If there's nothing out there at a resonable cost I might consider creating my own retrofit kit.