Hi. My first question, but it's an annoying one... My power steering is making a roaring sound when I'm turning the steering wheel. It sounds like it's missing oil, but the oil is just fine (with no apparent leaks). I've also tried to get ev air out, but nothing. To make it even crazier, it totally disappeared during the winter! So no sound in cold weather... Any of you got any ideas? Kind regards, Patrik, Södertälje Sweden