Ran into a weird glitch with my 2015 500e - the instrument cluster went totally dark while everything else was fine. After some head-scratching, I found out swapping two 5 amp fuses fixed it. First fuse got the cluster working when I opened the door, and the second one made it light up when I started driving. Easy fix once you know, but figuring it out was a bit of a hassle. Hope this helps anyone else in the same boat!