Redesigned for 2013, then reinvigorated for 2014, the mid-size Lexus GS sport sedans return for 2015 with a new F Sport package for the GS 450h hybrid, a new top infotainment system, and a few other minor changes. The 2015 Lexus GS 350 and GS 450h hybrid continue to take on a set of (mostly) German rivals that include the Mercedes-Benz...
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