Hey everyone, hope you are all well. I’ve recently bought a c63 w204 2011 (61 plate). The issue it has is that it’s making a loud whining noise which increases when your revs do. It’s really annoying and I have already tried getting it sorted by replacing the power steering reservoir. My steering isn’t as heavy now but the noise is still there. I was told by the mechanic it would clear up in about 20/30 miles but this doesn’t make sense as the noise is the exact same as it was before. Here is a video clip: https://streamable.com/s99abj I hope you guys can point me in the right direction.