A 31-year-old Mercedes-Benz driver was killed by a motorist who blew through a Brooklyn red light and is now charged with manslaughter for the crash, police said Monday. Arturo Alberto Baez Cordero was heading east on 9th St. in Gowanus when he was struck by a Honda Odyssey driver speeding north on Second Ave. about 6:25 p.m. Sunday, cops said.