Porsche Wind Deflector with Edge Lighting [from CAD, prototyping to finish]

[rick3000]

The rear window defroster would be easiest but I'm not sure if it has 12V constant or switched power. You could even wire a splitter, and source the male/female plugs from Porsche. For the designs, I really like 'PORSCHE' along the bottom, because you would still be able to see out the rear view mirror.

EDIT: The defroster plug wiring harness is about $15, PN 986 612 081 01, likely a VW or Mercedes plug.
EDIT 2: The wiring diagram for the rear defroster plug is EWD-24 for MY '98-'00, two wires, brown and grey/green. Brown is obviously the ground, however the power (GN/GR) looks to be switched power.