Saab ushers in the 2006 model year with a healthy list of enhancements to its large sedan, the 9-5. Among the changes are revised sheetmetal, new head and taillights, a new grille with what Saab calls a “wing motif,” and an updated instrument panel. Behind the scenes, the 2.3-liter, high-pressure turbocharged four-cylinder engine gets some added horsepower and torque, now rated at 260 and 272, respectively.