I'm not quite sure if this is exactly the same model, but I found an interesting story about this online at http://www.emercedesbenz.com/autos/mercedes-benz/classic/mercedes-benz-history-the-route-to-the-riding-car/attachment/mercedes-benz-history-788858_1446005_3744_5616__46g2406/. They claim it is one of the original Daimler-Maybach designed powered vehicles. A prototype built in the mid-1880's. Very cool.