2010 Mercedes GL-Class Owner's Manual - Page 167

Driving systems You will see, for example, the following message in the multifunction display: 165 RDepending on the ADS setting (Y page 159), the vehicle will be lowered to the highspeed level when traveling at higher speeds. At speeds below 25 mph (40 km/h) at the latest, it will be returned to the highway level. i The setting is stored when you turn off the engine. While driving, the vehicle is lowered automatically as follows: RAt Highway level vehicle speeds above 55 mph (88 km/h) or if the vehicle speed stays between 40 mph (64 km/h) and 55 mph (88 km/h) for approximately 20 seconds, the off-road level 2 setting is canceled and the vehicle is lowered to the off-road level 1. You will see, for example, the following message in the multifunction display: ! Keep in mind that on rough or uneven roads, adjusting the vehicle to a lower level may cause the vehicle underbody to come in contact with the road and result in damage to the vehicle underbody. Always make sure the vehicle has sufficient ground clearance before adjusting it to a lower level. X Start the engine. Turn outer adjustment ring : repeatedly to position 4 until all lit indicator lamps = flash. The vehicle adjusts to the highway level. The following message appears in the multifunction display while the level is being set: When one or more indicator lamps = are on: X RAt speeds above 60 mph (96 km/h) the off- road level 1 setting is canceled and the vehicle is lowered to the highway level. Z Controls in detail The vehicle is lowered to off-road level 2. Once off-road level 2 is reached, you will see, for example, the following message in the multifunction display: