2010 Mercedes GL-Class Owner's Manual - Page 271

Driving instructions Trailer towing G Warning! Failure to use proper equipment and driving technique can result in a loss of vehicle control when towing a trailer. Improper towing or failure to follow the instructions in this manual can result in vehicle damage and/or serious personal injury. Follow the guidelines below carefully to assure safe trailer operation. Contact an authorized Mercedes-Benz Center should you require an explanation of information contained in this manual. 269 trailer. The maximum permissible GTW to be towed: 7 500 lb (3 402 kg). Trailer Tongue Weight Rating (TWR) is the maximum permissible weight on the trailer tongue: 600 lb (272 kg) limit for MercedesBenz approved hitch receiver. Loading a trailer RWhen loading a trailer, you should observe that neither the permissible GTW, nor the Gross Vehicle Weight Rating (GVWR) are exceeded. The GVWR is indicated on the certification label located on the driver's door B-pillar (Y page 242). Maximum permissible values are listed on the safety compliance certification labels for the vehicle and for the trailer to be towed. The lowest value listed must be selected when determining how the vehicle and trailer are loaded. RThe tongue weight at the hitch ball must be Trailer hitch ROnly install a trailer hitch receiver approved for your vehicle. For information on availability and installation, contact an authorized Mercedes-Benz Center. RThe bumpers on your vehicle are not designed for use with clamp-type hitches. Do not attach rental hitches or other bumper-type hitches to them. reduce the possibility of damage, remove the hitch ball adapter from the receiver when not in use. RTo added to the rear axle weight to prevent exceeding the rear Gross Axle Weight Rating (GAWR). The GAWR is indicated on the certification label located on the driver's door B-pillar (Y page 242). i Mercedes-Benz recommends loading the trailer in such a manner that it has a tongue weight between 8 % and 15 % of the GTW. i The weight of other accessories, passengers and cargo will reduce the maximum trailer weight and tongue weight your vehicle can tow. Checking weights of vehicle and trailer RTo assure that the towing vehicle and trailer are in compliance with the maximum permissible weight limits, have the loaded rig (towing vehicle including driver, passengers and cargo, trailer fully loaded) weighed on a commercial scale. RCheck Electrical connections The vehicle is prewired to accept the sevenwire harness included in the Mercedes-Benz approved trailer hitch receiver kit. i A four-pole conversion plug is available from your authorized Mercedes-Benz Center as a spare part. For further information, contact an authorized Mercedes-Benz Center. Vehicle and trailer weights and ratings The Gross Trailer Weight (GTW) is the weight of the trailer plus the weight of all cargo, equipment, luggage, etc. loaded on the the vehicle's front and rear gross axle weight, the Gross Trailer Weight (GTW) and tongue weight. Z Operation