Bit of a genralisation here. Turn off the auto air conditioning (RED LIGHTON) Set the temp on manual to whatever your happy with and set the fan to one or two dots. Now set your position buttons (windscreen, middle, feet) to where ever suits. Now watch your MPG go up. Leaving the air con on is a sure fire way of decreasingyour MPG. It is wise however to run it once in a while.
I think the frugal use of the auto air conditioning is a fairly common tip in most cars. Its usually less of a problem for larger engined vehicles, but in the case of the Captur with its lowish BHP's its one worth investigating. Having the AC light come ON when NOT in use is a confusion waiting to happen. Many will just potter around quite happily not realising the extra burden they are putting on their engines.