That the Railion lettering shines through is not really a bug, but ultra-reality. I have already seen several locomotives where the railion lettering has been removed and replaced by the DB logo and because the color faded you could still see the Railion lettering. So not a bug, is a feature
I did a Google Search for 185.2's, and literally everything I found had just DB livery. I don't want to base a norm on a few, so I'm going to rename it to "Clean" livery.