How do you adjust the idle for 2005 ML350?

To adjust the idle on a 2005 Mercedes-Benz ML350, first ensure that the engine is at operating temperature. You can then locate the idle air control valve, which may require cleaning if it's dirty or malfunctioning. If adjustments are needed, use a scan tool to monitor and adjust the idle speed settings, as the vehicle's ECU typically manages idle control. It's recommended to consult a professional or refer to the service manual for precise instructions, as incorrect adjustments can lead to engine performance issues.