The JK generation of the Wrangler might be called the third generation of the rugged Jeep model, but it actually carried over the principle and the name of the WWII Willy's, through the CJ (civilian Jeep) models. In 2006, the Wrangler came, for the first time, with a four-door version. The 2007 model was launched in 2006 after a deep and focused effort from DaimlerChrysler that asked the owners what do they want from the Wrangler range. It was a car built from scratch, but the designers kept in mind the basic design principles with rounded headlights and the body-on-frame construction. The same seven-slats grille from the original Willys Jeep, which became an iconic look for the whole brand, was kept for the 2007 model. When compared to its predecessor, it featured a bigger bumper, to pass the safety tests all over the world. It had more rounded corners, but the overall appearance was tough. Inside, for the two-door version there was room for four passengers, but with very limited room for those in the rear. Even if the dashboard was new, the windows control buttons were kept on the center console. Like all its predecessors, the 2007 Wrangler had a removable roof, doors, and foldable windshield. It's a Jeep thing that the car-maker kept it. It was offered with a diesel unit and two V6 gasoline engines, with manual or automatic transmission. As an option, it was offered as 2WD.