A 26-year-old Bergen County man was robbed and carjacked early Thursday by three men with guns and wearing masks, authorities said. The man told police his jewelry and money were taken, along with his 2018 Mercedes SUV after one of the carjackers struck him in the head with a handgun. The incident occurred about 1 a.m. on Sugden Street in Bergenfield, according to Detective Lt. William Duran. When police arrived, they saw the victim’s SUV, along with dark Mercedes sedan, driving from the scene. “Officers attempted to stop the vehicles, which proceeded into Teaneck, where officers lost sight of…