Out of all the popular cities in Germany, Düsseldorf is the cheapest city to rent a car in at just C$ 21/day. Renting a car in Düsseldorf is 50% cheaper than renting one in Bremen where the per day rate is around C$ 41. Other fairly inexpensive cities in Germany to get a rental car in are: Cologne (C$ 22/day), Berlin (C$ 25/day), and Karlsruhe (C$ 25/day). While these cities typically have cheaper prices than the rest of the country, travelers looking to rent a car in Berlin should expect to spend around C$ 25/day on their transportation. The most popular city to rent a car in Germany is Berlin.