I recently added a Western Train set to my Playmobil collection, and the above video is a quick test of the system. I hotglued (!?!) my digital camera to the caboose (guard's van), and set it running. The wires were a bit twitchy, hence the delay at the start, but I've replaced them and that seems to have fixed matters.
The track is currently 20 feet long, but I'll be adding another 24 feet including a lot more straight sections as soon as they arrive.