I am seriously thinking about purchasing the 300 euro for the La Premiere Ground Experience for my CDG-YVR flight (AF 374) this coming September.

http://www.airfrance.us/US/en/common...a-premiere.htm

I am booked in Z class for that flight. Is Z class eligible for that purchase option? Is dialing the local French number the only means of reserving that in advance? The only other option I saw was paying at the airport on the date of departure. Is that true?