With its debut just around the corner, Audi revealed a few more details about the new ultra-efficient EV. Ahead of its official debut this fall, Audi revealed that the A2 e-tron will go on sale as its most efficient car ever. Audi A2 e-tron (Source: Audi)The Audi A2 e-tron features an active cool-air intake that stays closed during normal driving and at higher speeds to reduce drag. Like the new Volkswagen ID.3 Neo, Audi’s entry-level EV is expected to be offered with three battery packs: 50 kWh, 58 kWh, and 79 kWh. Starting at €38,200 (about $44,000) in Germany, the A2 e-tron will arrive this fall as Audi’s most affordable EV.