What's causing my Ford S-Max to make a loud screeching noise?

I recently purchased a Ford S-Max and have noticed that when I accelerate, there is a loud screeching noise coming from the engine. It's not present when I first start the car, but it seems to get louder the longer I drive. Is this something I should be concerned about? Any advice would be greatly appreciated.

It sounds like the most likely culprit is a worn-out serpentine belt. I would suggest taking your car to a trusted mechanic to have it replaced.

I had a similar issue with my Ford S-Max and it turned out to be a faulty alternator. I would highly recommend having it checked out as soon as possible.

It could also be an issue with the power steering pump. It's important to have this looked at as it could potentially lead to more expensive repairs down the road.