DRS is Drag Reduction System
KERS is Kinetic Energy Recovery System
Buttons on the wheel/keyboard are used to active these, and the game SHOULD report when they are activated or ready for activation, as they are noted on the screen when NOT in the cockpit view.. However, from the cockpit, you cannot tell how much KERS you have left or that the DRS is ready/open.. Having these as options for the Pro-Race or any other SymProjects item would be awesome..