Hello all. Just bought our first Jeep, a Diesel GC. We have a very similar vibration at idle(or anytime below 1k rpm) that will drive you nuts! It does not fluctuate, it is dead constant below 1k rpm, in or out of gear, A/C on or off. The door panel, seat, steering wheel, armrest, even the passenger seat vibrate. You can feel it in the floorboard. My metal watchband rattles if I have my hand on the wheel! It is as smooth as silk as soon as you get above the 1k rpm point. Service writer at purchasing dealer said "well, it's a diesel"! Well, I said, how come EVERY OTHER Eco diesel on your lot, Rams and GCs, do not have this vibration(shaking)? I have driven almost all of them. I'm talking to the Service Mgr Tues, and if he is not willing to find the problem, I will be going to another dealer. The vibration is bad enough that it is a deal breaker on me keeping the car. Which is a shame because we absolutely love everything about it!