To be sure, you should:
* Consult your Mondeo's repair manual: This will give you the most accurate and detailed location for your specific model.
* Use an online parts diagram: Many websites (like Ford's parts website or auto parts retailers' websites) provide diagrams that show the location of parts for specific Mondeo years and trims. Search using your vehicle's year, make, model, and engine code.
Accessing it will almost certainly require some mechanical knowledge and potentially specialized tools. If you're not comfortable working on your car yourself, it's best to take it to a mechanic.