Just a word of warning Frank, if you decide to have the dealer replace your heating elements you may want to take some precautions.
It think it was Andrew, (but I'm not sure) but it seems like somebody posted that their dealer really scratched up their door sills taking the seats out of their car.
You may want to put some vinyl tape over all your exposed metal surfaces before taking it in to have it worked on.
At least they can drop the top on your car to help facilitate their removal.
When my seat heaters quit working, I'm just going to forget about em. But then mine are out of warranty.
Good Luck