2009 Lexus GS 450h Owners Manual - Page 244

2-4. Using other driving systems n If the cruise control indicator light flashes Press the "ON-OFF" button off once, and then reactivate the system. If the cruise control speed cannot be set or if the cruise control cancels immediately after being activated, there may be a malfunction in the cruise control system. Have the vehicle inspected by your Lexus dealer. CAUTION n To avoid operating the cruise control by mistake Keep the "ON-OFF" button off when not in use. n Situations unsuitable for cruise control Do not use cruise control in any of the following situations. Doing so may result in control of the vehicle being lost and could cause an accident resulting in death or serious injury. l In heavy traffic l On roads with sharp bends l On slippery roads, such as those covered with rain, ice or snow l On steep hills Vehicle speed may exceed the set speed when driving down a steep hill. l On winding roads 182 GS_HV_U (OM30B44U) March 8, 2010 10:03 am