2010 Mercedes GL-Class Owner's Manual - Page 269

Driving instructions Crossing obstacles wheels at the center of the obstacle, and repeat same with the rear wheel. 267 ! Special attention is needed when you cross obstacles on a steep incline. The vehicle could slide sideways as a result of its possible slanted position which in turn may result in the vehicle tipping or rolling over. G Warning! ! Obstacles can damage the vehicle underbody or suspension components. If possible use the assistance of a second person outside the vehicle to scout the path you intend to take and check for adequate ground clearance when you cross obstacles with your vehicle. The person assisting you outside the vehicle should always be a safe distance away from the vehicle and positioned so that he or she cannot get hurt in case of any unexpected vehicle movement. After off-road driving or crossing obstacles, inspect vehicle for any damage, especially vehicle underbody and suspension components. Failure to do so can adversely affect the vehicle's future performance, including increased chance of an accident. When driving over tree stumps, big rocks and other obstacles, observe the following rules: RMake sure the off-road driving program (Y page 158) or if equipped the LOW RANGE mode (Y page 120) is switched on. RAvoid high engine speeds. RShift automatic transmission into gear range 1 (Y page 118). RCheck RCross Do not reduce the tire inflation pressure before driving through sand. However, if you do so, remember to correct the tire inflation pressure before continuing your trip. Driving with reduced tire inflation pressure increases the risk of losing control of the vehicle and rolling over. When driving on sand, observe the following rules: RSet the raised level (Y page 159). RAvoid RShift RIn high engine speeds. automatic transmission into a gear range that is appropriate for the terrain. sandy soil, drive at a steady speed as conditions permit. This helps overcome the vehicle rolling resistance and reduce the likelihood of the vehicle sinking into the ground. in tracks of other vehicles if they are not too deep and you have sufficient clearance. RDrive Ruts A number of off-road tracks or other byways have deep ruts which can cause the underbody to come in contact with the ground. RMake sure the off-road driving program (Y page 158) or, if equipped, the the vehicle clearance before crossing obstacles. obstacles (e.g. tree stumps or big rocks) very slowly by aiming one of the front Z Operation Driving on sand