Lexus LS460 2011 Owner's Manual page 289

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If the display flashes and a message is displayed
P. 696
CAUTION

Caution when using the Lexus parking assist-sensor
Observe the following precautions.
Failing to do so may result in the vehicle being unable to be driven safely
and possibly cause an accident.

Do not use the sensor at speeds in excess of 10 km/h (6 mph).

Do not attach any accessories within the sensor range.
NOTICE

Notes when washing the vehicle
Do not apply intensive bursts of water or steam to the sensor area.
Doing so may result in the sensor malfunctioning.
LS460_EE
2-4. Using other driving systems
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