Car2Go is a fleet of eco-friendly Smart cars that are accessed with a card. To join Car2Go, you must register online to receive a card in the mail that allows you to use the service in any of its cities in the North America and Europe. It requires a one-time fee of $35, plus the cost of the time you spend in the car (150 miles are included in the trip in the US). To see if a car is available when you find one in your city, check the card reader on the windshield. To open the car, hold the member card you were issued in the mail, wait for the doors to unlock, and follow instructions on the computer screen.