2004 Lexus LS 430 Owners Manual - Page 354

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 serious injury or death. (In this case, automatic braking will not work.) If there is a vehicle detected ahead, the delay in deceleration timing could cause serious injury or death. 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 serious injury or death. 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 serious injury or death. Dynamic laser cruise control- CAUTION Certain conditions make vehicle detection difficult or impossible. D As this system operates by detecting primarily the reflectors of the vehicle ahead, the distance cannot be accurately detected in the following cases, resulting in improper vehicle-to-vehicle distance. D The vehicle ahead has higher ground clearance, which means that the placement of the reflectors is in a higher position. D The rear section of the vehicle ahead is extremely dirty. D The vehicle ahead or other vehicles around you are flinging up water or snow. D Excessive exhaust gas (black smoke) is coming from the vehicle ahead or other vehicles around you, obscuring your front view. D Protective film is attached to the reflectors on the vehicle ahead, or reflectors are not installed on the vehicle ahead or are damaged. D Heavy luggage which is loaded in your trunk or on top of your rear seats is raising up the nose of your vehicle. 334