Lexus LS 600h L 2012 Owner's Manual page 239

2-4. Using other driving systems
CAUTION
To avoid operating the cruise control by mistake
■
Switch the cruise control off using the "ON-OFF" button when not in use.
Situations unsuitable for cruise control
■
Do not use cruise control in any of the following situations.
Doing so may result in loss of control and could cause an accident resulting in death
or serious injury.
In heavy traffic
●
On roads with sharp bends
●
On winding roads
●
On slippery roads, such as those covered with rain, ice or snow
●
On steep hills
●
Vehicle speed may exceed the set speed when driving down a steep hill.
During emergency towing
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