Hello,
I am trying to find out what this noise is. I posted a youtube video of the noise here:

It is a 2014 Mercedes C250
47,000 miles
4 cylinder

It makes this noise when it is off and on. It makes the noise after it has been driven for a while. It makes the noise when driving and turning left most of the time. Sometimes it make the noise when not turning. It doesn't matter if you are hitting the breaks or not. And as you see in the video, the car can make the sound when it is off. Any assistance would be greatly appreciated.

 

have you check the brake on certain noise location?

 

My experience , with around 50,000 miles is that the front discs are worn. Have you checked them to see how much wear is on them? I know there are electronic wear sensors, but again my experience is that they are on only one front wheel and one rear wheel.

Just a thought