Both front seats of the Dream Sleeper Mini campervan (Stealth as well) can swivel aka fully turn. Under the seat, you will see the black bar that has a circular knob on it. This is the lever to pull up to unhitch the seat so that it can be rotated. You will then see the horizontal bar that moves the seat forward and backwards.
The best way to release the lever is to first pull the seat all the way forward. So the horizontal bar is not restricting the lever. Stand outside the vehicle and place one hand up under the lever, so you are pushing up rather than leaning over the seat and pulling up.
Once you have pushed the lever up with your other hand push the edge of the seat so that it moves out of its placement. Once you have released it you can then stand up and swivel the seat around.
This should then work on both sides. Please let us know if this still doesn't release the seats.
Also, make sure to check out the How-To Use Your Dream Sleeper Mini Video.