Hi Hasu, and welcome to the club. Jaguar say that your AC should always be left on auto. I find that it takes a little time to get the operation to cold, but last Wednesday with the temperature around 28 celsius in London, I was down there and it kept me nice and cool all day. Does your car have the touchscreen, and is it a petrol or diesel, as that can make a difference? Also have you got the owner's Manual? If you haven't it is available to download just by googling S type Jaguar - Owner's Manual There is a Jaguar Owners Club meet at Gaydon on the 19th September and there will be quite a few s type owners there. Let us know how it you get on. Regards, Peter.