What Causes Intermittent Idle Vibration in Mercedes-Benz?
2 Answers
Intermittent idle vibration in Mercedes-Benz is caused by issues with the engine mounts. It is essential to inspect and address this promptly, as it can affect the vehicle's performance. Methods to Handle Engine Issues: Start and turn off the vehicle three times consecutively; disconnect the negative terminal of the engine battery, wait for 30 seconds, reconnect it, and then attempt to start the vehicle; use a fault diagnostic tool to troubleshoot and clear the issue. Specific Causes of Engine Problems: There are five main reasons why the engine warning light may illuminate: sensor issues; maintenance problems; fuel quality issues; poor combustion of the air-fuel mixture; and intake problems.
My Mercedes-Benz sometimes shakes a little at idle, which is really annoying. From experience, the most common cause is excessive carbon buildup in the engine clogging the fuel injectors, leading to uneven fuel supply and temporary engine instability. It could also be due to aging ignition coils or spark plugs with excessive gaps causing misfires, which often occurs during cold starts or when the engine is warm. Additionally, worn engine mounts can transmit vibrations into the cabin, making them particularly noticeable. If sensors like the oxygen sensor or mass airflow sensor malfunction, the computer can't control the engine speed properly, resulting in shaking. These minor issues can potentially damage the engine if left unaddressed for too long. It's advisable not to delay and to promptly visit a 4S dealership or professional auto repair shop for inspection and cleaning. Also, have them check if the idle control system is functioning properly—after all, even a good car can suffer from neglect.
