Mercedes-Benz ML550 rough idle issue with no engine light detected on Mercedes-Benz ML550

Some Mercedes-Benz ML550 owners report experiencing rough idle issues without any engine light being triggered. These problems may stem from a vacuum leak that disrupts the air-fuel mixture, leading to unstable idling. Additionally, worn-out or faulty spark plugs can cause misfires, further affecting engine performance. Some owners also note that a malfunctioning ignition coil can contribute to the rough idle experience. It is crucial to address these potential issues promptly to enhance vehicle performance and prevent further complications, and if the rough idle persists, consulting a professional mechanic for a thorough inspection is advisable.