Lexus GS460 Owner's Manual page 545

Have the vehicle inspected immediately.
A buzzer sounds and a warning message is shown on the multi-informa-
tion display. Failure to investigate the cause of the following warnings may
lead to the system operating abnormally and possibly cause an accident.
Have the vehicle inspected by your Lexus dealer immediately.
Warning message
(Flashing)
GS_G_U (OM30C11U)
May 21, 2010 1:06 pm
5-2. Steps to take in an emergency
Details
Malfunction in the automatic headlight leveling sys-
tem.
Malfunction in the rear lights system.
Malfunction in the steering lock system.
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