Not a bmw specific question but related to aircons in general. I have an old opel(92) model that needs an aircon regas. The one place that I went to said the new machine does not have the connecters for my car and wanted to charge like R2000 to convert it. I thought it sounded suspect and called auto aircon in endenvale they told me I pretty much need to change my condensor drier , compressor etc in order for my car to use the new gas. I assume there are still a lot of guys with older cars where the aircons still work. Is this conversion really necessary or is it simply a case of finding the right adapter/connector drain out the old gas and replace with new. Any advice would be much appreciated.