2009 Mercedes R-Class Owner's Manual - Page 285

Operation Driving instructions If you must drive through standing water, drive slowly to prevent water from entering the passenger compartment or the engine compartment. Water in these areas could cause damage to electrical components or wiring of the engine or transmission, or could result in water being ingested by the engine through the air intake causing severe internal engine damage. Any such damage is not covered by the MercedesBenz Limited Warranty. Trailer hitch ROnly install a trailer hitch receiver approved 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 trailer. The maximum permissible gross trailer weight to be towed: 3 500 lb (1 588 kg). Trailer Tongue Weight Rating (TWR) is the maximum permissible weight on the trailer tongue: 350 lb (158 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 255). 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 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 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. 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. Tongue Weight (TW) at the hitch ball must be added to the Gross Vehicle Weight (GVW) to prevent exceeding your Mercedes-Benz tow vehicle's rear Gross Z 283