Yes it is! And yes it was a typo! Thank you for finding the link to it. I was trying to find it before but couldn’t find it in official sources, DB deleted it from the official app. It did not stop at Troisdorf though.
It is operated by National Express, but I guess the routing comes from some other company (likely InfraGo)
It is operated by National Express, but I guess the routing comes from some other company (likely InfraGo)