2009 Cadillac STS-V Owner's Manual - Page 198

Brightness Control: Press the knob on the center of the DIC control panel to extend and then pull the knob until is completely extended. Turn the knob clockwise or counterclockwise to increase or decrease the brightness of the HUD display. To adjust the HUD so it can be seen properly: 1. Adjust the seat to a comfortable driving position, before adjusting the HUD position. 2. Start the engine. 3. Adjust the position and brightness of the HUD display. The HUD controls are located to the left of the steering wheel on the DIC control panel. Off: Turn the brightness control knob fully counterclockwise to turn the HUD display off. (Head-Up Display): Press to move the HUD display up or down on the windshield. HUD cannot be adjusted side-to-side. The brightness of the HUD display is determined by the light conditions in the direction the vehicle is facing and where the HUD has been positioned on the windshield. If the vehicle is facing a dark object or a heavily shaded area, the HUD may begin to dim because it anticipates the vehicle entering a dark area. When sunlight enters the HUD it can make it difficult to see the display. The display will return to normal brightness when the sunlight no longer enters the HUD. Wearing polarized sunglasses could also make the HUD display harder to see. ~ 3-44