Audi A4 e-tron

If you're confused when someone says "Audi e-tron," and you're not sure which electric car it means, don't feel bad--we're confused too. Audi may have more branded electric car concepts, prototypes, test vehicles, limited-production cars, and planned volume-production plug-in electric models than any other maker in the world. The company has chopped and changed its plug-in lineup several times over the past few years, making it difficult to keep track. Some models have been postponed, others dropped, and others introduced. Below is our full guide to all the e-tron models--plus the natural gas...