How do you switch climate control from celsius to Fahrenheit on Mercedes Benz S420?

To switch the climate control from Celsius to Fahrenheit on a Mercedes-Benz S420, first, turn on the ignition and access the vehicle's climate control settings. Look for the "Temperature" or "Settings" button on the climate control interface. Press and hold the temperature display until it switches between Celsius and Fahrenheit. Release the button once the desired unit is displayed.