Certainly, there were some hundreds of them. They lasted almost to the computer numbering era of the DB. (era 4)
Gepaeckwagen came in both passenger and goods train form. The passenger types had space, in addition, for passenger luggage.
The locomotive design was primarily intended for short route passenger trains. In fact the design was an upgrade of the class T11 (also 2-6-0t BR74) with an enlarged superheated boiler intended for the Berlin suburban lines where high acceleration between closely spaced stations was required. When the Berlin lines were electrified around WWI these near new locos became redundant and were spread across Germany. As reparations for WWI they spread across Europe. On the LBE some of these locos were even built as streamliners, although the streamlining was almost certainly for publicity purposes rather than all-out speed.