Hyundai used the 2010 Chicago auto show to quietly trot out a freshened 2011 Azera sedan, the large front-driver that sits between the Sonata and rear-drive Genesis in the brand’s lineup. GLS models get a revamped 3.3-liter that adds variable valve timing to the exhaust camshaft; the engine already featured the tech on the intake side. The Hyundai Azera Limited will continue to use the 3.8-liter