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. Adjust the viewing angle with the key, 7. . Press the OK button, 5 or the MENU button, 8, to leave the menu. The settings are then saved. Adjusting the display brightness If your car radio has been connected as described in the fitting instructions, the display brightness will switch with the headlights. The display brightness can be set at separate levels for day and night in steps from 1 to 9. Daytime display brightness . Press the MENU button, 8. . Press the or button, 7, as often as is nec