Mercedes-Benz C250 check engine light on with poor performance issue on Mercedes-Benz C250

Some Mercedes-Benz C250 owners report experiencing issues related to the check engine light activation, which may signal a serious fault detected by the vehicle's computer that requires immediate attention. These owners often find that the check engine light can be triggered by simple problems, such as a loose gas cap, but may also indicate more significant issues with the engine or fuel system. Additionally, a noticeable decrease in performance alongside the check engine light may mean the vehicle has entered "limp-mode" to prevent further damage, necessitating prompt inspection. Many owners discover that using a cheap OBD scanner may not yield accurate results, so visiting an authorized service center for proper diagnosis is recommended. Furthermore, some report that the check engine light can negatively impact fuel economy due to problems with the O2 sensor, which regulates fuel delivery. Common resolutions for these issues include replacing a loose or faulty gas cap and addressing malfunctioning oxygen sensors to restore the air-fuel mixture and reduce emissions. It is advisable for owners experiencing these symptoms to consult a qualified mechanic for timely diagnosis and resolution.