How do you use a drone on Autobahn Polizei

First of all, I use an Xbox 360 for this game, so if you play this on PS3, I can't help you.
To activate, you must be on a mission using a drone, then press the Right Stick in. That will drop the drone. To drive, it's just like the car. You have to drive under the Suspect's vehicle, then press the Right Stick again.