i know there are a few fuses for the audio system but they control other things as well so no good pulling them.
Engine fues box =
Location F19 - 15amp - Audio system, navigation system,
+
Location F50 - 40amp - Audio system.
Dash fuse box =
Location 17 - 5amp - Audio system, windscreen wiper rain sensor.
What radio is it. there normally is a fuse on the rear of the radio unit you can pull so your not pulling a fuse that controls other things, Its a quick and easy job getting to the back of the mk5 radio units. Plus its always a good chance to hoover up around and in the middle vents. Just 1 thing if you haeve the large middle vent make sure its closed when you pull it out i found it makes it a lt easier without the flap hanging down getting damaged.
Pleanty of how2s on the tubeofu