Everytime I drive my CX3 I hear something rolling down below the driver side. It is like a rolling stone or a screw stuck on a can of a Coke. Is it just some of the mechanisms working down below? Should I be worried about it or any of you guys has experienced the same? The car is in good working order. No faults that I know of. I've already told the dealer during my first month/1000km inspection but still I hear it. Thank you in advance for your inputs.