>>1306352I understand that they use in place of the ICE-TD, mostly as it's cheaper to operate for the diesel, and partly because DB hated the operations of the ICE-TD, because it was a maintenance hog.
I think all the ICE-TDs are retired/scrapped now, but there were a number of these "Regio-Swinger" sets which were painted in a long distance livery, that is, white with a red stripe. Some people memed it for being the pretend ICE.