If you're car is a 2008, then the cradle you have in your car shoul be the original retrofit option. Therefore it "should" be relatively straightforward to remove. Pop open the cover at the back of the rear cigarette lighters ... And see if the connector for the cradle is located. Once you can find that the rest should be easy.

Failing that go to your dealer and ask them
To printout the installation instructions for the accessory option