2010 Mercedes GL-Class Owner's Manual - Page 272
2010 Mercedes GL-Class Manual
Page 272 highlights
270 Driving instructions The values as measured must not exceed the weight limits listed under "Vehicle and trailer weights and ratings" (Y page 269). i The provided vehicle electrical wiring harness for trailer towing has a brake signal wire for hook-up to a brake controller. X Coupling a trailer G Warning! While you are coupling or decoupling a trailer, make sure nobody locks or unlocks the vehicle and/or opens or closes doors or the tailgate. The vehicle's level could change and you could endanger yourself and/or others as a result. Make sure that you do not operate the ADS button or the vehicle level control system when coupling/decoupling the trailer. Observe maximum permitted trailer dimensions (width and length). Most states and all Canadian provinces require Rsafety Make sure the automatic transmission is in park position P (Y page 115). X Engage the parking brake for the vehicle (Y page 112). X Start the engine (Y page 108). X Select the highway level (Y page 159). X Vehicles with Adaptive Damping System (ADS): Set the ADS to AUTO or COMF (Y page 159). X Turn off the engine (Y page 113). X Close all doors and the tailgate. X Attach the trailer. X Plug in all electrical connectors. Operation chains between the towing vehicle and the trailer The chains should be criss-crossed under the trailer tongue. They must be attached to the hitch receiver, and not to the vehicle's bumper or axle. Make sure to leave enough slack in the chains to permit turning corners. separate brake system at various trailer weights break-away switch on trailers with a separate brake system. Check with your local state laws for specific requirements. The switch activates the trailer brakes in the possible event that the trailer might separate from the tow vehicle. Ra Ra i When you are towing a trailer, the vehicle level always remains in the highway setting. The following applies additionally when towing a trailer: RThe vehicle is lowered to the highway level when it reaches a speed of 5 mph (8 km/h) if not set to highway level. RThe highspeed level is not available. The restrictions that apply to towing also apply when using accessories that are connected to the trailer power socket, such as a bicycle rack. Towing a trailer There are many different laws, including speed limit restrictions, having to do with trailer towing. Make sure your rig will be legal, not only for where you reside, but also for where you will be driving. A good source for this information can be the police or local authorities. Note the following, when driving with a trailer: RIn ! Do not connect a trailer brake system (if trailer is so equipped) directly to the vehicle's hydraulic brake system, as your vehicle is equipped with antilock brakes. If you do, neither the vehicle's brakes nor the trailer's brakes will function properly. order to gain skill and an understanding of the vehicle's behavior, you should