I noticed that when under 40mph and the MDS kicks in while putting load back on the motor just enough to keep it in 4 cylinders there is a rattle/vibration that occurs that almost sounds like a griding under the front passenger seat. Almost like a piece of metal rattling on the exhaust. I crawled under there but everything is pretty much covered. I'm bringing it in next week for the recalls and some other minor things. I'll let them know and I can replicate it every time. But just curious if anyone else has experienced this with their Hemi.