2006 Lexus GS 300 Owners Manual - Page 1052

STARTING AND DRIVING D On steep downhill slopes: If there is no vehicle detected ahead, the preset speed will be easily exceeded because of inefficient engine braking, resulting in death or serious injury. (In this case, automatic braking will not work.) If there is a vehicle detected ahead, the delay in deceleration timing could cause death or serious injury. D When the warning tone sounds frequently (because acceleration or deceleration was repeated or sufficient vehicle−to−vehicle distance was not maintained), an appropriate vehicle speed cannot be attained, resulting in death or serious injury. D On roads with steep and short inclines and declines, failure to detect the vehicle ahead will shorten the distance between your vehicle and the vehicle ahead, resulting in death or serious injury. G31013 Dynamic radar cruise control should not be used in circumstances which are inappropriate for any cruise control such as entering freeway on−ramps or off−ramps. CAUTION The dynamic radar cruise control should not be used when exiting from, or when entering or merging onto a freeway. When you are following a slower moving vehicle and exiting, the sensor does not detect the vehicle and will accelerate to preset speed. 406