Im not sure about the steering wheel controls. (kinda wondering that myself. My volume button is really worn)
With the dash, 4x4 control, and headlights. If you take the surround off the panels are pretty easy to get to. With a small screw driver you remove most of the housing for the components to get to the lights. If you try the lights are a dealer only item. Advanced/ NAPA etc wont carry them
