2007 Mercedes GL-Class Owner's Manual - Page 372

Operation Driving instructions Make sure the automatic transmission is set to P ( page 194). Set the parking brake for the vehicle ( page 68). Start the engine ( page 57). Close all doors and the tailgate. Set the parking brake for the trailer. Warning! Passenger compartment When you uncouple the trailer, the vehicle is temporarily raised because the springs are relieved of load. Be especially careful during this process, as you could otherwise injure yourself and/or others. Make sure that any persons remaining in the vehicle do not press the switches for vehicle level control or the ADS*. Warning! G Always fasten items being carried as securely as possible. In an accident, during hard braking or sudden maneuvers, loose items will be thrown around inside the vehicle, and cause injury to vehicle occupants unless the items are securely fastened in the vehicle. The rear cargo compartment is the preferred place to carry objects. Always use tie down rings, and if so equipped, always use the cargo net* when transporting cargo. The cargo net* cannot secure hard or heavy objects. Always fasten items being carried as securely as possible using the cargo tie-down rings in the cargo floor area and fastening materials. G Disconnect all electrical plug connectors. Uncouple the trailer. Make sure that the trailer coupling is free of load. Turn off the engine ( page 69). As soon as you disconnect the electrical connection between the trailer and the vehicle, the vehicle will lower. To help avoid personal injury, make sure no one is near the wheel housing or underneath the vehicle before the electrical connection is disconnected. 371