I took delivery of my new 2016 XD diesel in late may 2016. Rode all this time and recently found a roofing nail in my tire so I went to Sams to get it repaired ( free for members - can't beat that) and searched bumper to bumper and realized I had never been given the wheel lock key!
I thought this was unusual but went online and it looks like it is a 50/50 shot of having one.
Called my dealer today and bringing it by there to try and identify which set I have so I can get a key.