Buick 2004 Rendezvous Owner's Manual page 164

When you first start the vehicle the display will show
BUICK and the Buick logo for a few seconds. If it is cold
outside, this display may stay on for up to a minute.
Clean the inside of the windshield as needed to remove
any dirt or film that reduces the sharpness or clarity
of the HUD image.
To clean the HUD, spray household glass cleaner on a
soft, clean cloth. Wipe the HUD lens gently, then dry
it. Do not spray cleaner directly on the lens because the
cleaner could leak into the unit.
If the ignition is on and you cannot see the HUD image,
check to see if one of the following conditions exist:
•
The HUD unit is covered
•
The HUD dimmer knob is adjusted incorrectly
•
The HUD image is not adjusted to the proper height
•
Ambient light in the direction your vehicle is
facing, is low
•
A fuse is blown. See Fuses and Circuit Breakers on
page 5-109.
If you ever have to have your windshield replaced, be
sure to get one that is designed for the HUD or your
HUD image may look blurred and out of focus.
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Ultrasonic Rear Parking Assist
(URPA)
The Ultrasonic Rear Parking Assist (URPA) system is
designed to help you park, while the vehicle is in
REVERSE (R). It operates only at very low speeds, less
than 3 mph (5 km/h). URPA can help make parking
easier and to help you avoid colliding with objects such as
parked vehicles. The URPA system can detect objects up
to 5 feet (1.5 m) behind the vehicle, and tell you how
close these objects are from your rear bumper.
Your vehicle's URPA operates when the shift lever is
moved into REVERSE (R) and the vehicle speed is less
than 3 mph (5 km/h). Four ultrasonic sensors located at
the rear bumper are used to detect the distance to the
object. The URPA display is located inside the vehicle,
near the rear window. It has three color-coded lights used
to provide distance and system information to the driver.