This route has always been one of my favourites for several reasons, namely because of the incredible timetable, variety of services (both duration and type), rolling stock (such as the epic 218!) and finally a very busy Hamburg Hbf (and now Lubeck Hbf too with all the 628 AI traffic etc). But, overall, one main thing that still frustrates is the older TOD 3 lighting. Pretty much like Koln-Aachen, the timetable is perfect, although it really just needs updating to TOD 4 for it to be complete. Thank you!