This is not MB related but any help would be appreciated. It concerns my wife's Ford Fiesta. While it is sitting, it makes noises akin to hot engine cooling down, except the car has been sitting unused for a few days. I would understand it if it made the noise after it had been raced, but no, the car hasn't been moved. It is quite spooky. The car used to be parked outside the bedroom window but because of the noises, it has had to be moved away.