For years, one of the defining images of the African political élite has been the silhouette of a figure sitting behind tinted glass or drawn curtains in the backseat of a luxury car. The car’s model may vary, and the color too, but nine times out of 10 the make is Mercedes-Benz. In Swahili, which is spoken throughout eastern Africa, members of the ruling class are even known by the nickname wabenzi, or “people of the Benz.”