The knob you see on the Stingray is called the Driver Mode Selector. It moves through five driver modes, Weather, Eco, Tour, Sport and Track. It is a standard feature on all variants of the 2014 Corvette. It adjusts up to twelve parameters of the vehicle. These can include suspension (if equipped with the Magnetic Selective Ride Control shocks), traction parameters (only Z51 models get the eLSD), steering, automatic shift points, etc.I see various pics of the suspension adjust knob on the console. Does this knob come on non Z51 cars or is it exclusive to Z51 with Mag Select?????