You start by locking the front wheels when you want to fold the Cybex Gazelle S. Next, press the handlebar button and slide it to the left along with the release trigger. Slightly push it down, and you will see that the stroller folds itself. It's great to know that the Cybex stroller can be folded with the car seats, which will spare you time to take the seat out. However, if you are folding it with both seats in, you have to make sure the seat on the top is parent-facing while the one on the bottom is facing the world. Once you fold the stroller, press the auto-lock clip to hold it in place.