Hello. I have a 2012 Limited with EcoBoost and I'm hearing what sounds like a rattling or vibration sound coming from the front part of the vehicle during low RPMs (at a stop light, idling, etc.). I started noticing this problem about a month ago but my friend says since the EcoBoost engine is smaller than the V6/V8, it will produce some vibration or rattling since the engine housing is not custom-fitted for the EcoBoost. Excuse my skepticism, but I'm not 100% sold on that fact. One other friend suggests that the noise is coming from where the windshield and A-pillar meet and they're rubbing together. Either theory seems shaky. Has anyone else experienced this problem or something similar to this? I haven't seen a Ford mechanic yet; I wanted to get any similar stories on here if I could. Thanks.