Lexus GS 350 Owner's Manual page 555

554
7-2. Steps to take in an emergency
Interior
buzzer
Once
Warning buzzer
■
In some cases, the buzzer may not be heard because of noisy place or an audio sound.
GS350_300_GS F_OM_OM30J17E_(GE)
Exterior
Warning message
buzzer

(Flashes)
Details/Actions
After the engine switch has been
turned off with the shift lever in a
position other than P, the shift lever
has been shifted to P.
 Turn the engine switch off.