Send suitcases with the DB luggage service.
Our partner Hermes will be happy to take your luggage
from you and bring it directly to your destination.
(Use the language select pulldown at top of the page where is says "deutsch").
Luggage transport on a train has never been like it is on an airline, where your bags travel with you on the same plane. In the early 1960s, when I traveled from Seattle to New York for college, I had to take my trunk to the station in Seattle three days in advance to assure that it would be waiting for me in NY when I arrived.
In 1987, I was traveling on a business trip in Germany with my co-worker who had brought his wife. We were in Zweibrücken and the company wanted us to fly on the same day to Hamburg to visit a clinic, then to Munich, to the company's German HQ. My companions didn't want to pay air fare for her to fly with us, so she decided to take the train. The company's country manager, who was with us at the time, suggested that she take all the luggage with her, check it on the train, so we wouldn't be bothered with it on the planes. (Bad idea)
When she got to the Bahnhof, with all of our luggage, she was informed that, if they checked it through, it wouldn't get to Munich for three days. We were scheduled to fly back to the US in two days. So she had to handle all of our luggage, by herself, on the train.