1998 Buick Park Avenue Owner's Manual - Page 151

The brightness of the E3U.D image is determined by whether the headlamps are on or off, and where you have the HUD d i m e r control set. 2. Adjust the seat to p u r driving posielop~. Slide the image height adjuster control d l the way up, raising the Enage as far as possible. 3. Now slide the image height adjuster C O I I ~ .down SQ ~ the image is as low as possible but still in full view. 4. Slide the d i m e r control d ~ w n w t until the HUD ~d image is no brighter than necessary.