I have had all of the def problems the others have mentioned as well. It wouldn't regenerate and went in to limp mode in October. I had to be towed in and they had it for 3 weeks. That time they said it was just a filter. the light has been back on and I took it to a different dealership last week. They replaced all the injector and the converter in a day, but wouldn't explain the issues. I have driven at least 250 miles since and it seems fine so far. I also got rear-ended last summer and a third dealership couldn't match the paint. They had it for over six weeks and it still isn't fixed correctly. Jeep service as a whole has been a nightmare and extremely disappointing. But despite all of that, I still love the car. Good luck getting your issues resolved.