At the 2009 Frankfurt Auto Show Mercedes-Benz released the new SLS AMG model. It’s their new supercar with 571 horsepower and a top speed of 300 km/h (180mph). But the real special thing about this car are the Gullwing doors. These doors make the car a real icon. To communicate this special release they created a unique billboard. Just a simple poster placed under a glass cover, but the glass doors are left open in the same style as the Gullwing doors.