I am no where near a mechanic and by the time I got to the dealership (still under warranty), it was warm enough that I could not reproduce the sound.
Only on cold days, somewhere around 32F and below, when applying gas starting from a stand still, I hear some kind of rattling/shuddering coming from what appears to be behind the center console. It does not appear to make a difference whether the engine is warm or not, just seems to be consistently related to the temperature outside.
I have no idea what is causing this and am looking for any thoughts/advice.
Thanks.