My daughter and I just fixed mine in 20 minutes. We only disconnected the power, I don't use it and don't want to pay $800 in parts and $400 for labor when I just wanted the noise to stop. We couldn't find any instructions on how to do this without replacing something or taking parts out, so we used several instructions and improvised. We did not have to take anything out and we didn't even have to use tools! I will attach pictures to show what we did.
1. Lower the seats by pulling on the loop by the top of the seat belt.
2. The carpet covering is connected in 3 places in the front and the connectors just pop in and out. In the back there is a loop where a latch from the side bolster hooks so complete the next step before attempting to remove the carpet piece.
3. Gently but firmly pull the side bolsters (the plastic coverings just behind the windows) to unhook them from the side of the car. We found it easiest to both unhook and rehook if you start from the back and work towards the side windows. They are designed to pop in and out but are sturdier than the ones holding the carpet in place.
We didn't take these completely off but removed them just enough to unhook from the back of the carpet piece.
4. The carpet covering should now side of easily, if you didn't remove the bolsters completely like we didn't, then you need to bow the carpet to remove it. The belts will be connected to this piece but can be tucked to the side so they don't get in the way.
5. Just in front of the shade is a power box with a white connector for the wires behind it. The are several such boxes under the carpet connecting to the speakers so double check that the only wires go to the shade before you disconnect them. You'll see in the picture that is the one just in front of the shade. To disconnect the wires is much like unhooking a phone line, push down on the small tab and pull back. Tuck the disconnected wire to the side.
6. Turn the car on and check if the shade functions. The wires shouldn't disable anything else so if anything else doesn't work, like the back up camera, then you probably got the wrong wire. But that's an easy fix as you only need to plug it back into the box.
7. Follow steps 1-4 in reverse to put it all back together, remember to hook the latch on the bolster back through the loop at the back of the carpet and to work from back to front when reattaching the bolsters so you can see where they latch.
The image show the loop to fold the seats down, the fasteners at the front of the carpet, the side bolsters half removed, what you should see after the carpet is removed, a close up of the box with the white wire connector that needs to be disconnected (you can just barelysee it behind the box).
Hope this helps!