The Rhenish Railway Company started operations on the section to Müngersdorf with four steam locomotives, three of which were manufactured in England. The Carolus Magnus was built by the newly founded Dobbs & Poensgen locomotive factory in Aachen, but it was prone to failure and had to be rebuilt. It was only used to haul work trains and was sold early. The 10 locomotives were estimated to have operated a total at 5361 Prussian miles () in 1841. After the opening of the whole line, the number of locomotives used grew to a total of 21.
