Gx460_U.s.a. (Om60G24U - Lexus GX460 Manual

2-4. Using other driving systems
Driving in vehicle-to-vehicle distance control mode
This mode employs a sensor to detect the presence of vehicles up to
approximately 400 ft. (120 m) ahead and to judge the distance between
your vehicle and the vehicle ahead of you.
Note that vehicle-to-vehicle distance will close in when traveling on long
downhill slopes.
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GX460_U.S.A. (OM60G24U)