This is a cumulative achievement for driving a total of 4km in the Merengue which is a small one seat electric car found in Watch Dogs 2. It can be stolen in the open world or purchased from Total Motors for approximately $43,000. Once you are inside of the car, just set a waypoint and drive at a high speed for approximately 2-3 minutes. It will unlock when your car comes to a complete stop.
Solution by
Maka91