I recently purchased a 1998 S70 which has the basic heater/ac setup without Climate Control. I was wondering if it can be replaced with the climate control setup by simply buying the climate control head, and installing it, or if there are other things that need to be done to accomplish this. I see the Climate Control heads on ebay fairly reasonable. I thought it would be a great thing if it were easy to do. Let me know, any help is greatly appreciated!!!