Update: I've been wanting to fix this with a steel zip tie and finally got some practice. (Practice because as I was about to fix this one I noticed it's cracked where the outer handle attaches but I figured I can do some trial and error to figure out a good method)
This is the standard break. One half of the hinge snaps off. Sometimes it will still be semi-attached but it's usually down inside the door. Try to find it I'll get back to that.
Remove the self destruct tab. I'm not sure if this even does anything on the X5 but it It gets stuck in the locked position you will surely break your DHC
Make sure the teeth are aligned as such.
The hardest part is getting the spring in position but I've developed a very reasonable method. Clamp the lower part of the DHC in a vice then while manipulating the moving part to align with the teeth, use a large flat blade screwdriver and push the spring down into position while pulling the hinge back together.
Once together it will fight like crazy to separate, so put a locking pliers exactly where shown to hold it during the next steps.
How/where to put the steel zip tie.
Note how I use the clip as the pressure surface to replace the broken off piece. Ideally you would put in the broken piece to have the stainless zip tie hold that and it will hold the hinge axle tighter.
It's difficult to pull tight so don't try to get it perfect, instead add a shim under the back side to make it right afterwards.
I'm going to make a very detailed how to with some better photos. I'm also going to do the same for the actuator motor fix.
I paid like $7 for 25 so fixed the DHC for about 30¢.