7 months and 6500 miles into my new challenger and the most dreadful thing possible has happened. I turn on my car to hear a sound I had not heard before, and immediately noticed the check engine light has come on. Now I'm no automobile technician, and I'd hope anything wrong with it is under warranty, but I'd like some feedback on what the issue could possibly be, because I am observant. The car goes in Monday morning to get checked out. I've noticed the engine sounds and feels a lot "rougher" when idling and MDS did not activate during my entire trip home after the light kicked on (steady speed of 70 down the interstate). I popped open my hood if just to check for foreign objects, nothing out of the ordinary.