A hit-and-run Mercedes driver who struck and killed another motorist on the West Side Highway five years ago was finally arrested this week, police said.  Jay Taveras, 27, was charged with manslaughter, criminally negligent homicide and leaving the scene of an accident in the early-morning crash that killed Thomas Dunlea, 58, in late December of 2021, according to authorities. Taveras was picked up by investigators Wednesday evening while at a parole meeting related to a Manhattan attempted assault conviction, according to law enforcement sources and State Correction records. Dunlea – behind the wheel of a 2005 Hyundai Tucson – was driving south on the West Side Highway and began making a left turn onto eastbound West 50th Street around 4:20 a.m. Dec. 29, 2021 when Taveras, operating a 2021 Mercedes-Benz sedan, hit him head-on, authorities said.  Mercedes driver Jay Taveras, 27, was arrested in the early-morning crash that killed Thomas Dunlea, 58, in late December of 2021, cops said.…