So I'm not sure what this could be. But I have noticed what sounds like a metallic ting sound in my 2007 mini cooper s with a auto tranny. The sound is at idle but if I push the gas a little the sound goes away. But as soon as the car drops idle speed noise is back. Anyone ever have this?

 

post a short video or youtube link. where is it coming from, top, bottom, left, right, when cold, when warm, always?

 

Get one of these from your local automotive parts store.