What Causes Idle Vibration in Mercedes-Benz Smart?

[StStephen]

Mercedes-Benz Smart idle vibration may be caused by severe engine carbon deposits or ignition system issues. Specific problems: Severe engine carbon deposits are the most common cause of car vibration. Poor ignition system performance or bad spark plug firing conditions can also lead to such faults. Unstable oil pressure and engine aging are also likely to cause vibration in Smart. Solutions: Clean the fuel system and check if the idle motor has carbon deposits that need cleaning, then recheck after cleaning; inspect if the spark plugs have excessive carbon deposits and replace them if necessary; check the oil pressure and replace components if needed.