2010 Mercedes GL-Class Owner's Manual - Page 168

166 Driving systems i The message can be cleared by pressing the V, U, & or * button on the multifunction steering wheel. When the highway level is reached, indicator lamps = go out and the following message appears in the multifunction display for 5 seconds: Warranty. All wheels must be on or off the ground. Observe instructions for towing the vehicle with all wheels on the ground. Controls in detail ! Only conduct operational or performance tests on a two-axle dynamometer. If such tests are necessary, contact an authorized Mercedes-Benz Center. You could otherwise seriously damage the brake system and/or the transfer case which is not covered by the Mercedes-Benz Limited Warranty. i In winter operation, the maximum effectiveness of the 4MATIC is only achieved with winter tires (Y page 257) or snow chains as required. Parktronic system i The vehicle is lowered to the highway level automatically if the vehicle speed is above 60 mph (96 km/h). All-wheel drive (4MATIC) In vehicles with all-wheel drive (4MATIC), both axles are powered at all times when the vehicle is being operated. The 4MATIC improves traction in conjunction with the ESP® (Y page 63) and the Electronic Traction System (4-ETS) (Y page 64). G Warning! The Parktronic system is an electronic parking aid with ultrasonic sensors designed to assist the driver during parking maneuvers. The Parktronic system indicates the relative distance between the vehicle and an obstacle visually and audibly. The Parktronic system is activated automatically when Ryou switch on the ignition release the parking brake If a drive wheel is spinning due to insufficient traction: RWhile RWhile and Ryou driving off, apply as little throttle as possible. driving, ease up on the accelerator pedal. and Rthe automatic transmission is in drive position D, reverse gear R, or neutral position N RAdapt your speed and driving style to the prevailing road conditions. Failure to observe these guidelines could cause the vehicle to skid. The 4MATIC cannot prevent accidents resulting from excessive speed. ! Do not tow with one axle raised. Doing so could damage the transfer case, which is not covered by the Mercedes-Benz Limited The Parktronic system deactivates at speeds above approximately 11 mph (18 km/h). At lower speeds, the Parktronic system activates again. The Parktronic system also deactivates when you shift the automatic transmission into park position P or engage the parking brake. The Parktronic system monitors the surroundings of your vehicle with six sensors