Revealed here to media by Mercedes-Benz CEO Dieter Zetsche ahead of its public debut at the upcoming Geneva auto show, the new A-Class has been comprehensively re-engineered for 2018 as part of the German automaker's efforts to more closely challenge rival premium brand hatchbacks such as the Audi A3 and BMW 1-Series as well as Europe's longtime best-selling model, the Volkswagen Golf.