2009 Lexus GS 350 Owners Manual - Page 202

2-1. Driving procedures n Shift ranges and their functions l You can choose from 8 levels (GS460) or 6 levels (GS350) of engine braking force. l A lower shift range will provide greater engine braking force than a higher shift range, and the engine revolutions will also increase. l If you accelerate while in ranges "1" to "7" (GS460) or "1" to "5" (GS350), the shift range may automatically range up in accordance with the vehicle's speed. n "S" mode When the shift range is "6" (GS460) or "4" (GS350) or lower, holding the shift lever toward "+" sets the shift range to "8" (GS460) or "6" (GS350). n Downshifting restrictions warning buzzer (in the "S" mode) To help ensure safety and driving performance, downshifting operation may sometimes be restricted. In some circumstances, downshifting may not be possible even when the shift lever is operated. (The warning buzzer will sound twice.) n When driving with the cruise control system (or dynamic radar cruise control sys- tem) The engine brake will not operate in the "S" mode, even when downshifting to "7", "6", "5" or "4" (GS460) or "5" or "4" (GS350). (→P. 165, 169) n Snow mode automatic deactivation Snow mode is automatically deactivated if the "ENGINE START STOP" switch is turned to ACCESSORY or IGNITION ON mode after driving in snow mode. n If the shift lever cannot be shifted from "P" →P. 543 140 GS_G_U (OM30B43U) March 8, 2010 10:20 am