Hi Guys, Im new to the forum to excuse me if this has been put in the wrong section. I have a very very strange Humming noise that has developed on my lovely C43. This has only just started in the last week or so. What happens is that most of the time when i drive it now after i hit 30 or 40 mph i start to hear a humming noise coming from the engine bay. it does not change pitch with rpm or road speend and makes the noise when in every gear, and even if i shift to Neutral. the noise is the same regardless of how i am driving. When i pull up say at a set of lights etc, after a few seconds the noise stops. Recently i have had both Lower wishbones replaced but i think this is just a Coincidence. The car had a B service in December which included Tranny oil replace. To me the sound is too light to be anything metalic. its almost like a hum/buzz sound. Just wondered if anyone has come across this?