Okay. Adding my experience to the list here. 27,000 miles. Took delivery March 2014.
Full disclosure, I love this car. Flat out love it. Love the luxury, the uConnect, the adaptive cruise, the engine, the mileage, the comfort, love all of it. As a sports car guy, I never thought I could love an SUV, but I've bonded with the Red Bull.
Took it in for an oil change and recalls a week or so ago. Driving back from St. Louis on Sunday, check engine light comes on. Take it in for the zipties on the DEF cables this morning (planned) and diagnose the check engine light (unplanned). Dealer reported the DEF Injector was loose, triggering the light. They ziptied it up and cleared the code, sending me on my way.
I told him what I've seen here on the forum and expressed my concerns. They're very friendly. Instructed me to use any DEF I want as long as it's not expired.
We'll see how it goes.