2008 Subaru Impreza Owner's Manual - Page 240

7-18 Starting and operating quence, control of the vehicle may be lost and the risk of an accident increased. phenomenon is not an indication of a problem in your vehicle. Driver's Control Center Differential (DCCD) (WRX STI) WARNING Always use the utmost care when driving. Being overconfident because you are driving a vehicle with a driver's control center differential could easily lead to a serious accident. & Driving tips Do not drive with your foot resting on the clutch pedal and do not use the clutch to hold your vehicle at a standstill on an upgrade. Either of those actions may cause clutch damage. Do not drive with your hand resting on the shift lever. This may cause wear on the transmission components. When it is necessary to reduce vehicle speed due to slow traffic, turning corners, or driving up steep hills, downshift to a lower gear before the engine starts to labor. On steep downgrades, downshift the transmission to 4th, 3rd or 2nd gear as necessary; this helps to maintain a safe speed and to extend brake pad life. In this way, the engine provides a braking effect. Remember, if you "ride" (over use) the brakes while descending a hill, they may overheat and not work properly. The engine may, on rare occasions, knock when the vehicle rapidly accelerates or rapidly pulls away from a standstill. This CAUTION All the indicator lights will flash in the event that the driver's control center differential has a malfunction. Have the vehicle inspected by your SUBARU dealer. The driver's control center differential allows you to freely change the degree of limitation of the differential action (limited slip differential (LSD) torque) of your vehicle's center differential. By using the center differential control switch, you can set an initial LSD torque to match the road surface conditions, driving conditions and your driving style.