The merciful parents of a promising Brooklyn man mowed down by a boozed-up driver asked his killer Thursday to honor their son's legacy by teaching students about the perils of drunken driving.

Michael Ortiz, 22, pleaded guilty to vehicular manslaughter and DWI in the 2008 death of Fred Malcolm McCormack, accepting a unique no-jail deal that requires him to speak at 100 high schools.

"Don't let us down," Fred McCormack Sr. told Ortiz during the courtroom appearance. "Make something real good with your life and we will support you."