Subaru Impreza Manuals 2011 Impreza Owner's Manual | Page 291

Starting and operating SI-DRIVE (STI) . Do not keep the vehicle in a stationary position on an uphill grade by using the “D” position. Use the brake instead. . The engine may, on rare occasions, knock when the vehicle rapidly accelerates or rapidly pulls away from a standstill. This phenomenon does not indicate a problem. SI-DRIVE (SUBARU Intelligent Drive) works to maximize engine performance, control and efficiency. This system consists of three modes: Intelligent (I), Sport (S), and Sport Sharp (S#). By adjusting the SI-DRIVE selector, the character of the power unit changes. & SPORT mode SPORT mode is used when power is needed for rapid acceleration or for uphill driving. To select this mode, move the select lever from the “D” position to the manual gate. 7-27 & Intelligent (I) mode When selected, the SPORT mode indicator light on the combination meter will illuminate. To deselect SPORT mode, move the select lever to the “D” position or select manual mode. To subsequently reselect SPORT mode, move the select lever to the “D” position and from there to the manual gate. In this mode, the transmission shifts up at higher vehicle speeds and shifts down more responsively than in normal mode. ! For smooth, efficient performance driving The Intelligent (I) mode provides wellbalanced performance with greater fuel efficiency and smooth driveability without stress. Power delivery is moderate during acceleration for maximum fuel efficiency. – CONTINUED –