What causes the warning light to appear in a Mercedes-Benz?

[MacSamuel]

The reasons for the warning light appearing in a Mercedes-Benz: engine malfunction light triggered by abnormal engine oxygen sensor; clogged fuel injectors and carbon buildup on the intake valves, etc. Abnormal engine oxygen sensor: The engine oxygen sensor is usually placed near the intake manifold. Aggressive driving or collisions can cause the oxygen sensor to shift or become damaged, leading to sensor abnormalities and triggering the warning light. Clogged fuel injectors and carbon buildup on the intake valves: Impurities in gasoline can accumulate at the fuel injectors, affecting fuel injection, especially in direct-injection engines, which can directly cause the engine to stall. After combustion, these impurities produce carbon deposits. When carbon accumulates on the throttle valve to a certain extent, it can interfere with the normal opening and closing of the throttle, affecting engine performance and causing the warning light to illuminate.