I have already removed the inner fenders several times, for example to apply underbody protection or at the front left to connect a Warn Winch with a LeTech bracket to the standard Albright relay under the fender. In order to remove the inner fenders, the flares must first be removed. I do this with a strong jerk and with the help of a plastic lever. When it is torn off, some of the dowels of the extensions always remain stuck in the sheet metal of the fender. It's difficult to get them out with pliers. But if you press the ring of a 6 mm box wrench over the dowel from the inside, you unlock it and it more or less pops out of the sheet metal by itself. Then you can insert the dowel head back into the extension and use it again during installation. I always spray all plug connections with silicone spray before installation so that they snap into place more easily. Otherwise, removing the inner fender is pretty easy. There are just a lot of Torx screws and some plastic nuts in the middle, but otherwise it is a straight forward job.