2008 Buick Enclave Owner's Manual - Page 124

Outside Convex Mirror Object Detection Systems Ultrasonic Rear Parking Assist (URPA) If your vehicle has the Ultrasonic Rear Parking Assist (URPA) system, it helps you park easier and avoid other vehicles while in REVERSE (R). It operates at speeds less than 5 mph (8 km/h). It can determine how close objects are to the rear bumper, up to 8 feet (2.5 m) behind your vehicle. The distance sensors are located on the rear bumper. {CAUTION: A convex mirror can make things (like other vehicles) look farther away than they really are. If you cut too sharply into the right lane, you could hit a vehicle on your right. Check your inside mirror or glance over your shoulder before changing lanes. The passenger's side mirror may have convex glass. A convex mirror's surface is curved so more can be seen from the driver's seat. Outside Heated Mirrors Press the rear window defogger button, located on the climate control panel, to also turn the outside heated mirrors on or off. The mirrors will heat to help clear fog or frost from the surface of the mirror. See "Rear Window Defogger" under Dual Automatic Climate Control System on page 3-22 for more information. 2-44