Thanks to  totallythatstupid.com

Before Mercedes owned AMG, there was this: the 500E. It was a joint venture with Porsche – the only time Mercedes ever collaborated with their friends from across town – that resulted in a sleeper road rocket that looked to the untrained eye like every other taxicab on the streets of Stuttgart. Those in the know, however, will see flared fenders front and rear, special headlights, and four place seating. And those are just about the only clues that give away what lies under the hood.