2006 Lexus RX 400h Owners Manual - Page 497

DRIVING TIPS D After driving through tall grass, mud, rock, sand, rivers, etc., check that there is no grass, bush, paper, rags, stone, sand, etc. adhering or trapped on the underbody. Clear off any such matter from the underbody. If the vehicle is used with these materials trapped or adhering to the underbody, a breakdown or fire could occur. D In a rollover crash, an unbelted person is significantly more likely to die than a person wearing a seat belt. Therefore, the driver and all passengers should fasten their seat belts whenever the vehicle is moving. D When off−road driving cannot be avoided, do not drive at excessive speeds, jump, make sharp turns, or strike objects, etc. These maneuvers may result in loss of control or vehicle rollover causing death or serious injury. You also risk expensive damage to your vehicle's suspension and chassis. NOTICE D If driving through water, such as when crossing shallow streams, first check the depth of the water and the bottom of the river bed for firmness. Drive slowly and avoid deep water. D Take all necessary safety measures to ensure that water damage to the traction battery, hybrid system or other components does not occur. Water entering the engine compartment may cause severe damage to the hybrid system. Water entering the interior may cause the traction battery stowed under the rear seats to short circuit. Water can wash the grease from wheel bearings, causing rusting and premature failure, and may also enter the transaxle case, reducing the gear oil's lubricating qualities. D Sand and mud that has accumulated in brake drums and around brake discs may affect braking efficiency and may damage brake system components. D Always perform a maintenance inspection after each day of off−road driving that has taken you through rough terrain, sand, mud, or water. For scheduled maintenance information, refer to the "Owner's Manual Supplement / Scheduled Maintenance". 461