I don't know why some dealers are dicks about warranty work and others are just great.
I had a 1987 Cougar XR7 and I was going down the highway and had my sunroof not open, but in the up position in the rear. I hear this funny sound, look up and the sunroof was gone. Smashed all over the highway. Took it to the dealer where I bought it and said I must have done something to it for that to happen. WTF?? Went to another Mercury dealer, they replaced it under warranty without any problem.