Standard Procedure - Coolant Level Check
WARNING: This page is about a different car, the 2004 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Do not remove pressure cap for routine coolant level inspections.
The coolant reserve system provides a quick visual method for determining the coolant level without removing the radiator cap. With the engine cold and not running , simply observe the level of the coolant in the coolant pressure container. The coolant level should be between the MIN and MAX marks.