The M-Class inspires the performance-minded driver, but when you add the GTS to the badge you better be ready for something special. New water-injection technology helps maintain intake manifold temperatures which allows higher boost pressures and increased horsepower. But, of course, the special model was going to have more power. The real sweetheart in the GTS is the roughly 200-pound weight loss that makes the GTS more nimble and able to accelerate quickly. Add in some great appearance enhancements in the way of cool lighting elements, a deleted back seat and a huge wing and you have a standout model worthy of the special badging that lets others know to get out of the way at a glance.