the patent was granted, which occurred in November of that year. Benz unveiled his invention to the public on 3 July 1886, on the Ringstrasse in Mannheim. Benz later made more models of the Motorwagen: model number 2 had engine, and model number 3 had engine, allowing the vehicle to reach a maximum speed of approximately . The chassis was improved in 1887 with the introduction of wooden-spoke wheels, a fuel tank, and a manual leather shoe brake on the rear wheels. About 25 Patent-Motorwagen were built between 1886 and 1893. Bertha Benz's trip Bertha Benz, Karl's wife, whose dowry financed the development of the Patent-Motorwagen, was aware of the need for publicity. She took the Patent-Motorwagen No. 3 and drove it on the first long-distance internal combustion automobile road trip to demonstrate its feasibility. That trip occurred in early August 1888, when she took her sons Eugen and Richard, fifteen and fourteen years old, respectively, on a ride from Mannheim through Heidelberg, and Wiesloch, to her maternal hometown of Pforzheim. In Germany, a parade of antique automobiles celebrates this historic trip of Bertha Benz every two years. On February 25, 2008, the Bertha Benz Memorial Route, following the route of Benz's journey, was officially approved as a Tourist or Scenic Route by the German authorities as a route of industrial heritage of mankind. The of signposted route leads from Mannheim via Heidelberg to Pforzheim (Black Forest) and back. In media The car can be driven in the video game Gran Turismo 4 and Android video game Driving Legends: The Car Story. It was also driven by Sherlock Holmes's sister Enola in the film Enola Holmes. See also History of the automobile Benz Velo (later 4 wheel model) List of Mercedes-Benz vehicles (incl. summary of Benz vehicles) List of motorcycles of the 1890s List of motorized trikes Three-wheeler Early developments essential to the development of automobiles Nicolas Léonard Sadi Carnot, physics of the internal combustion engine Illuminating gas, first internal combustion engine fuel Ligroin or heavy naphtha, first liquid automotive fuel, n-hexane Car and car engine designers, chronologically by first vehicle/engine built Nicolas-Joseph Cugnot (1725–1804), French inventor of the world's first automobile, a 1769–1770 steam-fuelled vehicle Étienne Lenoir, developer of the first atmospheric gaseous fueled internal combustion engine and automobile (1860–1863), pioneer of electroplating Nicolaus Otto, developer of the first successful compressed charge gaseous fueled internal combustion engine (1860s–70s) Siegfried