What Causes a Mercedes Engine to Suddenly Shake with the Check Engine Light On?

[McParker]

Reasons for Mercedes engine shaking: 1. Ignition system issues: A malfunction in the car's ignition system can cause the engine to shake at idle. Typically, checking the spark plugs and replacing any faulty ones can resolve the issue. 2. Poor fuel quality: This is one of the most common problems in daily driving. Low-quality fuel can affect engine performance, leading to shaking at idle. Always refuel at reputable gas stations to ensure fuel quality. 3. Engine carbon buildup: Severe carbon deposits in the engine can cause shaking and reduced power. Timely cleaning of carbon deposits can address these issues. 4. Unstable oil pressure: Fluctuating oil pressure can disrupt fuel supply, resulting in engine shaking. In such cases, promptly check and ensure the oil pressure is within the normal operating range.