Check your serial number: Ensure it starts with VWZ (e.g., VWZ1Z7.,VWZAZ.). This service works for factory radios found in: Golf, Passat, Polo, Tiguan, Touran, Jetta, Scirocco, Caddy, Transporter, etc.Units: RCD 510, RCD 310, RCD 300, RCD 210, RNS 510, RNS 315, RNS 310, MIB, and more.
