Jan 16 : U.S. auto safety regulators have granted Tesla a five-week extension to respond to an investigation into whether its vehicles violated traffic laws while the Elon Musk-led company's Full Self-Driving system was engaged. The National Highway Traffic Safety Administration said on Friday it has extended the deadline for key responses until February 23 after Tesla requested more time to manually review thousands of records to identify incidents that may be relevant. The probe is part of