Southeast.S3

Hi all, My S3 is running currently running only FWD, I have done my research into the multitude of things that could be causing this and the obvious first thing to try is replacing the fuse for the Haldex. But I can't find it for the life of me, does anyone have any idea which fuse it is as the owners manual fuse diagram is horrendously blunt and uninformative? If you have any other ideas or potential fixes they would also be greatly appreciated. Thanks, Matt