The Aura sedan is the second piece of the puzzle that promises to reveal, within a short couple of years, a completely reinvented Saturn. Like the SKY roadster introduced earlier in 2006, the Aura is more stylish and more confident than anything Saturn produced in its first 15 years of existence. Although the Aura shares a platform with the Pontiac G6, Saturn’s version feels significantly more refined inside, outside and on the road. Later, a gas-electric Aura is scheduled to arrive as GM’s firs