How to: Removing a Double Din MK4 Radio
The radio is held in with 4 clips. There is a specific Tool required to remove the radio.
These clips are just a piece of metal that is bent at a 90 degree angle with little holes for your tool to catch. When you insert the Tool, the idea is the tool goes into the holes, pushes against the inside edge, and pulls the clips inwards, releasing the radio.
Here is a basic animation I made depicting how it works.
If your Stock/OEM radio is stuck:
