This is is one of the infamous "weed trains", consisting of a crew car (rebuilt from a 3-axle rebuilt DB car), an equipment car, a spray car and four water cars. As the chemicals contaminated the drinking water, these trains were retired, and the DBAG is still looking for an effective and environmentally friendly way of eliminating weed in the tracks. Rheinisches Industriebahnmuseum Köln, 2001-06-04.

photo: tobias b köhler