Mercedes-Benz E250 check engine light issue related to faulty O2 sensors on Mercedes-Benz E250

Some Mercedes-Benz E250 owners report experiencing issues related to faulty O2 sensors, including symptoms such as slow acceleration, loss of power, irregular idling, engine hesitation, high fuel consumption, and the illumination of the check engine light. These problems can lead to rough engine performance and potential stalling, significantly affecting the vehicle's operation. A malfunctioning O2 sensor may trigger specific diagnostic trouble codes, like P0156, indicating circuit issues that can result in poor fuel efficiency and engine misfires. To resolve these concerns, owners often need to replace the faulty O2 sensor to restore proper air-fuel mixture and reduce emissions. It is crucial for owners to consult a certified Mercedes mechanic for accurate diagnosis and timely repairs to maintain optimal engine performance and efficiency.