Are you a fan of sporty driving? In your spare time, do you enjoy the occasional outing on the racetrack? Then you shouldn’t do without the optional mechanically locking rear differential available in conjunction with 18-inch or 19-inch wheels. It further enhances the traction of the driven rear wheels on uneven roads and when accelerating out of tight bends. Road holding at the limits of performance is even more impressive. The car holds its course better and so PSM intervenes less often. In other words, sheer driving pleasure and faster lap times.