What Causes Mercedes-Benz Engine Failure?
1 Answers
Mercedes-Benz engine failure may be caused by issues with fuel quality, carbon buildup in the engine or spark plugs, or damage to the coolant temperature sensor. Below are detailed explanations: 1. Fuel quality issues: Poor or substandard fuel quality. Some owners may notice the engine warning light illuminating on the dashboard shortly after refueling, often due to filling up with low-quality fuel at non-standard gas stations. While this may not immediately affect vehicle operation, it can cause long-term damage to the engine. 2. Carbon buildup in the engine or spark plugs: Over time, engines accumulate carbon deposits, which can lead to engine damage, difficulty starting, poor acceleration, excessive engine noise, and other issues. The accumulated heat can cause irregular ignition, resulting in engine knocking. In such cases, the engine warning light will activate. 3. Coolant temperature sensor failure: When the engine is cold, the coolant temperature sensor sends information to the ECU to enrich the air-fuel mixture, ensuring stable engine operation. If the sensor fails to signal the cold engine condition, the air-fuel mixture may become too lean, causing unstable engine performance. Conversely, if the sensor incorrectly signals a cold condition when the engine is warm, the air-fuel mixture will become too rich, also leading to abnormal engine operation.