Why does my Ford Mondeo's engine make a knocking noise?

I recently purchased a Ford Mondeo and noticed that the engine started making a knocking noise. I'm worried this might be a sign of a bigger problem. Should I be concerned and what should I do?

It is normal for engines to make some noise, especially when starting up. However, if the knocking noise persists, it could be a sign of an issue with the engine. I recommend taking your car to a certified Ford mechanic for a diagnostic to determine the cause of the noise.

It could be something as simple as using the wrong grade of fuel or a dirty air filter. Check these things first before taking your car to a mechanic.

I had a similar issue with my Ford Mondeo and it turned out to be a faulty spark plug. Make sure to get your spark plugs checked and replaced if necessary.