2004 Mercedes ML-Class Owner's Manual - Page 207

Operation Driving instructions Trailer hitches Only install a trailer hitch receiver approved for your vehicle. For information on availability and installation, see your authorized Mercedes-Benz Light Truck Center. The 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. To reduce the possibility of damage, remove the hitch ball adaptor from the receiver when not in use. Electrical connections The vehicle is prewired to accept the seven-wire harness included in the Mercedes-Benz approved trailer hitch receiver kit. An additional four-pole conversion plug is included in the Mercedes-Benz supplied trailer hitch receiver kit. For further information, see your authorized Mercedes-Benz Light Truck Center. Vehicle and trailer weights and ratings Gross Vehicle Weight Rating (GVWR) is the maximum permissible vehicle weight: 6614 lbs (3000 kg). Gross Vehicle Weight (GVW): Comprises weight of vehicle including fuel, tools, spare wheel, installed accessories, passengers, cargo and trailer tongue. It must never exceed the GVWR. Gross Axle Weight Rating (GAWR) is the maximum permissible axle weight: front rear 2976 lbs 3858 lbs (1350 kg) (1750 kg) Gross Trailer Weight (GTW) is the maximum permissible trailer weight to be towed: 5000 lbs (2260 kg). Trailer Tongue Weight Rating (TWR) is the maximum permissible weight on the trailer tongue: 500 lbs (225 kg) limit for Mercedes-Benz approved hitch receiver. 207