(Image source: centricditigal.com) Shares of the auto retailer AutoNation, Inc. (NYSE:AN) are performing well today after the company revealed that new auto sales for April rose 14 percent compared to the same period a year ago. The company sold 25,669 new vehicles in the month of April. Premium luxury vehicles saw the highest surge in sales. On a comparative same-store basis, new car sales climbed 11 percent in April.