Convoy of 2017 Mercedes E-Class Coupe (C238) Escorted by a Porsche 911?

We get the feeling that these guys are up to no good. How else can you explain such shady behavior from several Mercedes test engineers? Okay, we admit that we are trying to make the story seem a little more interesting than it is. Spotting a prototype for a future car is normal these days, especially if you happen to live around Stuttgart, where both Porsche and Mercedes do their finest work. However, three E-Class Coupe prototypes were …