We are also good to reach without car. When you arrive at the main station of Cologne please use the exit Breslauer place and go to the left directing towards Ebert place.
From the airport Cologne/Bonn drive with the airport bus to the station Breslauer place and from there it is only 100 meters footpath to the hotel.
You can leave your car in the SAVOY garage for 18.50 EUR per day.