Lexus GS 350 Owner's Manual page 550

Warning message in radar cruise mode (if equipped)
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In the following cases, the warning message may not be displayed even if vehicle-to-vehi-
cle distance decreases:
When your vehicle and the vehicle ahead are traveling at the same speed or the vehicle
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ahead is traveling more quickly than your vehicle
When the vehicle ahead is traveling at a very low speed
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Immediately after cruise control speed is set
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At the instant the accelerator pedal is depressed
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Open door warning message (GS350/GS300 only)
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The open door warning message continues to display until a door or the trunk is fully
closed, even if the engine switch is turned off. However, approximately 20 minutes after a
door or the trunk is not fully closed, the battery-saving function operates and the display
turns off even though a door or the trunk is not fully closed.
GS350_300_GS F_OM_OM30J17E_(GE)
7-2. Steps to take in an emergency
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