Motorists are just now discovering a dashboard button that can significantly reduce fuel costs. Modern cars are filled with buttons, switches and gauges that can be overwhelming, but there are several worth getting to know as they can save you a lot of money over time - not just the air conditioning recirculation button. Swansway Motor Group is urging drivers to familiarise themselves with a button that can decrease your petrol and diesel costs every time you drive. With average petrol and diesel prices still hovering around highs of £1.45-£1.50 at most petrol stations, there's never been a better time to save on fuel. Read more: Spanish city desperate for more UK tourists The button usually looks like an 'A' with a small circular arrow and is typically located somewhere on or near the steering wheel, according to the Express. The button automatically turns off the engine when the car stops, then restarts it once you take your foot off the brake pedal. This is particularly useful when stuck in traffic or at traffic lights, as it significantly reduces the amount of fuel wasted during these times, thereby reducing your petrol and diesel costs, reports the Mirror . Swansway Motor Group has highlighted a dashboard feature that could be a game-changer for drivers looking to save on fuel amidst rising costs. They stated: "Dashboards are often full of buttons which mean very little to drivers, but motor experts are alerting drivers of one small button which could save them plenty of fuel. Swansway explains that the small button on your dashboard with a small circular arrow or 'A' symbol is a feature known as the engine auto stop/start function. "The button, which aids in enhancing fuel economy and minimising emissions, automatically powers down the engine when a vehicle comes to a complete halt. As soon as you lift your foot off the brake to move again, the engine reignites." This clever feature allows drivers to control the auto stop/start function, offering potential fuel savings when idle at traffic lights or waiting at junctions. "With fuel prices on the up, the auto stop/start function is a small button with a significant purpose. Drivers stand to benefit from fuel savings and a reduction in their vehicles' harmful emissions, which is beneficial for everyone."