Towing - TT vs 5er (here we go again!) - sorry folk!

Suggestions I can give you about hooking up and unhooking are
1. Make sure the pressure is off the kingpin. If you have pressure on the kingpin, you may not be able to release the arm at all.

2. I bought a folding plastic Step Stool so I can reach the arm from outside of the truck bed. It works great!

Here's a good video of what to do. https://www.youtube.com/watch?v=dkrpS6rvczA Since I started doing this, I've had no issues at all.