Amazon has made it easier to research cars online, but actually purchasing a car? That's another story. Even a recent deal with Seat in France limited customers to making a downpayment on the web -- they still had to agree to a phone interview to clinch the sale. However, the dream of one-click vehicle shopping just came a bit closer to reality. Amazon is partnering with Fiat to let Italian motorists buy the 500, 500L and Panda on the web at discounts up to 33 percent greater than seen at retail. They'll still have to visit a dealership to complete the purchase, but this is about as direct as it gets if you're not ordering a Tesla.