I noticed that my Model X's climate controls seem to be miscalibrated. Specifically, when it's cold outside, let's say 50 degrees F, and I set the climate temperature to 81 degrees F, the air coming out of the vents would be best described as lukewarm. If I increment it one more degree, it goes to "HI" and then becomes very hot. There doesn't seem to be a normal gradation to the heat. Does your X have that issue? I took it to the Service Center, and we sat in another X and it had the exact same problem. The Tech said they would be putting in a request to have engineering take a look at it. I'm curious to see how big of a problem this is. I was on the .42 firmware and am now on the .44 firmware but still have the same temperature issue.