Lexus LS460 2011 Owner's Manual page 188

2-1. Driving procedures
CAUTION

When taking a nap in the vehicle
Always turn the engine off. Otherwise, you may accidentally move the shift
lever or depress the accelerator pedal, which could cause an accident or fire
due to engine overheating. Additionally, if the vehicle is parked in a poorly
ventilated area, exhaust gases may collect and enter the vehicle, leading to
death or a serious health hazard.

When braking the vehicle

When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and may cause one
side of the vehicle to brake differently than the other side. Also the park-
ing brake may not securely hold the vehicle.

If the electronically controlled brake system does not operate, do not fol-
low other vehicles closely and avoid downhills or sharp turns that require
braking.
In this case, even though the brakes still operate, the brake pedal should be
depressed more firmly than usual. Braking distance also becomes longer.

The brake system consists of 3 individual hydraulic systems: if one of the
systems fails, the others will still operate. In this case, the brake pedal
should be depressed more firmly than usual and braking distance becomes
longer. If this happens, do not continue to drive the vehicle. If the brake
system warning light (red indicator) comes on together with buzzer sound
while driving, immediately stop the vehicle in a safe place and contact any
authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.

If the vehicle becomes stuck or bogged (AWD models)
Do not spin the wheels recklessly when any of the tires is up in the air, or
stuck in sand or mud, etc. This may damage the drive system components or
propel the vehicle forward (or in another direction) and cause an accident.
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