I just went and looked at my 2014 27FB International and that is not a split in the door, that is the seam between the upper and lower half of the door skin that is covered by that trim.
As far as re-attaching the trim, that is an easy fix. The plastic insert in the center of the trim is held on with double sticky tape. Carefully pry off about a foot to give you some working room and cut or drill out the rivet that has come loose.
Then install a new rivet or two to re-secure the trim channel, with your favorite sealant behind it and then re-stick the plastic insert, using glue if needed.
I have found over the years that traveling to a dealer for the small stuff is a huge waist of time, most things you can fix yourself. If you do not have a Pop Rivet gun, you may as well get one with an assortment of rivets, and learn how to use it. Someday, you are going to loose some interior rivets (this is normal) that will need to be replaced. You don't want to travel to a dealer to replace a ten cent rivet that only takes thirty seconds.