C70 – Automatically turn off air conditioning?

Hello Together, as is well known, the operation of the air conditioning increases the fuel consumption. In addition, it is of course completely useless when the roof is open… I often drive long distances (>500-600 km). It happened to me often that I noticed only after 200-300 km that the air conditioning has tried to cool the surroundings of the car all the time. I can say that much I can say: She has not managed… Now I am looking for a way to switch off the air conditioning automatically when the roof is opened. Lt. mine there is no setting/programming for this. is that right? Do I have to live with it?