Cadillac 2005 XLR Owner's Manual page 147

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+ - (Brightness): This button is used to adjust the
brightness of the HUD and the instrument panel cluster.
DIMMER: This button is used to select the HUD or
the instrument panel cluster to adjust the brightness.
HUD: This button is used to adjust the vertical position
of the HUD display.
The HUD controls are
located to the left of the
steering wheel.
To adjust the HUD so you can see it properly, do the
following:
1. Adjust the seat to a comfortable driving position. If
you change your seat position later, you may have
to re-adjust your HUD.
2. Start your engine and press the top or bottom
of the HUD button to center the HUD image in
your view.
The HUD image can only be adjusted up and down,
not side-to-side.
3. Press the DIMMER button until the DIC reads HUD
DIMMING. Then use the brightness button to adjust
the desired intensity.
The brightness of the HUD image is determined by the
light conditions in the direction your vehicle is facing
and where you have the HUD set. If you are facing a
dark object or a heavily shaded area, your HUD
may anticipate that you are entering a dark area and
may begin to dim.
To turn off the HUD, press the brightness button down
until the image disappears.
Polarized sunglasses could make the HUD image
harder to see.
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