I too was offered a AA Warranty for £299 and even though they said no hard sell, he tried!
All the usual worry stuff and even though my C-Max has done 112,000, she has a FULL ford service and will continue to do so.
I did try to find the full T&C but no joy as well and I did have the book at home when I asked for a copy but felt it only covered fresh air!
The repair cover looks ok but again seems restricted.
At the end of the day, it is wether you want peace of mind. If anything went wrong within the first 3 months of owning the car I would be straight back to the dealer, otherwise just have the breakdown cover and keep the car well serviced and oil change every 6 months.