The Engine Idle Stop n Go on my wife's NLine works sporadically. One minute it works and the engine shuts down and then the very next stop light it doesn't. Took it in to the dealer for an oil change and this issue. They said that certain parameters need to be met with sensors in order for it to work and in the winter it is hard to meet those parameters. I don't know anything about it but I am thinking that's incorrect and that there is an issue. It's not really a big deal but more annoying. Has anyone else had this issue and if so was it corrected?