I installed the MOPAR heated seat kit in mine last year. It looks simple to do based on the instructions, but it is not a simple job. It takes ingenuity because the directions are not that great, hand strength to work with the seat fabric and the metal hog rings, and finesse not to break any of the plastic trim. But as much of a pain as it was, it is my favorite mod so far (except for the lift). I use the heated seats every day in winter and they are so great! This mod has a big payoff if you can pull it off.
2008 Liberty Sport 4x4 Automatic