Black plate (30,1)Cadillac ATS Owner Manual - 2013 - crc - 6/5/125-30 Instruments and Controlsoutside lighting. However, the HUDbrightness control can still beadjusted as needed.The HUD image can temporarilylight up depending on the angle andposition of the sunlight on the HUDdisplay. This is normal and willchange when the angle of thesunlight on the HUD displaychanges.Polarized sunglasses could makethe HUD image harder to see.Care of the HUDClean the inside of the windshieldas needed to remove any dirt or filmthat could reduce the sharpness orclarity of the HUD image.To clean the HUD lens, use a soft,clean cloth that has household glasscleaner sprayed on it. Wipe theHUD lens gently, then dry it. Do notspray cleaner directly on the lensbecause the cleaner could leak intothe unit.If You Cannot See the HUDImage When the Ignition Is On. Is anything covering theHUD lens?. Is the HUD dimmer setting brightenough?. Is the HUD image adjusted tothe proper height?. Are you wearing polarizedsunglasses?If the HUD Image Is Not Clear. Is the HUD image too bright?. Are the windshield and HUDlens clean?If the HUD image is not correct,contact your dealer.Keep in mind that the windshield ispart of the HUD system. SeeWindshield Replacement onpage 10‑28.Vehicle MessagesMessages displayed on the DICindicate the status of the vehicle orsome action that may be needed tocorrect a condition. Multiplemessages may display one after theother.The messages that do not requireimmediate action can beacknowledged and cleared bypressing SEL. The messages thatrequire immediate action cannot becleared until that action isperformed. All messages should betaken seriously and clearing themessages does not correct theproblem.The following are some of thevehicle messages that may bedisplayed depending on the vehiclecontent.InformationProvidedby: