Stogey - yes they purged them, had them off the rims to put on my new wheels back in late March. By contrast over the weekend I asked my wife if she has checked the pressure in her tires on the Mercedes and her response was "I thought you did that kind of stuff?" so I went up to check them, they have plain old air, 1 year and a half with no checks, hot and cold weather and all four were perfect, same as when we bought the car. Now why can't ours do that?
Pat