* Fingernails: Try gently prying it loose with your fingernails. Work slowly and carefully around the edges.
* Small flathead screwdriver: Use a small, flathead screwdriver to carefully pry under an edge of the plug. Be extremely cautious not to damage the vent or surrounding plastic. Only apply gentle pressure.
* Plastic pry tool: A plastic pry tool (often included with electronics or used in automotive detailing) is less likely to damage the plastic than a metal tool.
* Needle-nose pliers: Use needle-nose pliers only as a *last resort* and with extreme caution. Grab the edge of the plug firmly but gently, and pull.
Important Considerations:
* Inspect the vent: Before attempting to remove the plug, carefully inspect the area for any markings or instructions. Some plugs might twist or have a small tab that needs to be depressed.
* Don't force it: If the plug doesn't come out easily, stop. Forcing it could break the vent or the plug itself.
* Battery safety: Wear safety glasses, as small pieces of plastic might break off. Also be mindful of any potential acid exposure (though less likely with a new battery).
If you're still having trouble, it's best to consult your Chrysler 300's owner's manual or take the car to a qualified mechanic or auto parts store for assistance. They can easily remove the plug safely. Attempting to force it could create a more serious problem than a stuck plug.