Amid the ongoing cost of living crisis every penny counts and drivers are now being urged to use a "secret" button to save on fuel.
The button will not only save fuel but also make drivers and passengers much more comfortable during car journeys, the Express reports. Drivers will likely not be surprised that their air-conditioning system uses engine power in diesel and petrol cars, or battery power in electric vehicles.
For internal combustion engines that can lead to much bigger fuel consumption. The system usually works by taking the outside air and then heating or cooling it.
