Check engine light comes on while driving 2002 S430 Mercedes Benz?

If the check engine light comes on while driving your 2002 Mercedes-Benz S430, it indicates that the vehicle's onboard diagnostic system has detected an issue. This could range from a minor problem, like a loose gas cap, to more serious engine or transmission issues. It's advisable to have the vehicle diagnosed using an OBD-II scanner to retrieve error codes and identify the specific problem. Ignoring the light could lead to further damage, so it's best to address it promptly.