J'ai trouvé ca sur le forum de vwvortex :
"If you like the Phaeton antenna you can install it on your MK4 Golf, GTI, Jetta, or B5/B5.5 Passat because it fits in the existing suqare mounting hole. You'll have to make a connector (or buy the phaeton signal wires and run them to your head-unit) to use the radio receiver of the antenna, and you'll have to get a GPS cable to connect the GPS receiver to you navigation system. If you have on-star, the connector for that should be the same, however you cannot use on-star with GPS navigation without getting a second antenna. It provides better radio reception than my R32's stock antenna did and I think it looks a lot better, especially compared to the Triplex antenna. Note: The Golf 5's will have this style of antenna in theory.
The part number is: 1k0-035-507-c and it'll cost about $125 for the Phaeton antenna."
Apparememnt donc la référence 1K0035507C est pour la réception radio et GPS.