Can anyone help with some info? My friend has recently bought a 2007 57 plate C220CDI Coupe, which I might add, is a lovely car. It has all the usual extras with Air Con or Climate, with the manual controls (round dials) whatever people choose to call it nowadays. Having owned quite a few Mercedes over the years and driven many more than I have owned over 30 years, I have always been under the assumption that when the red light is on, the aircon/climate is off and when the light is off, the aircon/climate is on, he says that he has read the manual to his new car and it states that, when the red light is on, the aircon/climate is on and when off, the aircon is off. I think he is wrong! Does anybody happen to have the same or similar car, and can they verify when the aircon/climate is working, is the light on or off? This would help settle the light on/off dispute, between me and my friend and also notify me that mercedes have changed the way the light works for aircon/climate, Regards, Terry.