At first glance, the 2011 E350 BlueTec looks like just another mid-sized diesel car from Mercedes-Benz. Nothing special, right?FAST FACTS1. Powering the E350 BlueTec is a 3.0L turbo-diesel that makes 210-hp and 400 lb-ft of torque.2. Acceleration is rated at 6.7 seconds to 60-mph with fuel economy of 22/33-mpg (city/hwy).3. The diesel-powered Benz starts at $50,900; a $1,400 increase over the