Last night I bought myself a 2015 Chrysler 200C with the 2.4 as a commuter car. It’s got 33k miles on it. I really like the car, but last night I noticed when I’m stopped at a stoplight or something, the car shakes pretty significantly. As soon as you press the pedal, it’s smooth again. When the car is in park and running, it still shakes slightly, but nothing like when it’s in drive. It’s to the point when standing outside the car, it almost sounds like my Powerstroke diesel. I popped the hood and noticed the motor is literally shaking. I’ve read it could be spark plugs, but that seems odd to me. When driving it’s smooth as can be (and responsive as a 4 banger could be I think?) Anyway, any insight?