Will it make a difference if you use regular versus premium gasoline on Mercedez Benz C240 engine?

Using regular gasoline in a Mercedes-Benz C240, which is designed to run on premium fuel, may lead to reduced performance, fuel efficiency, and potential engine knocking due to lower octane ratings. While the engine may still run on regular fuel, it might not operate optimally, and long-term use could result in engine damage. It's generally recommended to follow the manufacturer's guidelines and use premium gasoline for the best performance and longevity of the vehicle.