2011 Mercedes CL-Class Owner's Manual - Page 454

452 Uniform Tire Quality Grading Standards Trailer load/noseweight The trailer load/noseweight affects the gross weight of the vehicle. If a trailer is attached, the trailer load/noseweight is included in the load along with occupants and luggage. The trailer load/noseweight is usually approximately 10% of the gross weight of the trailer and its cargo. Your Mercedes-Benz is designed for transporting persons and their luggage. Mercedes-Benz does not recommend towing a trailer with your vehicle. Uniform Tire Quality Grading Standards Overview of tire quality standards Maximum tire load G Warning Tires and wheels Do not overload the tires by exceeding the specified load limit as indicated on the Tire and Loading Information placard on the driver's door B-pillar. Overloading the tires can overheat them, possibly causing a blowout. Overloading the tires can also result in handling or steering problems, or brake failure. The Uniform Tire Quality Grading Standards are U.S. government specifications. Their purpose is to provide drivers with uniform reliable information on tire performance data. Tire manufacturers have to grade tires using three performance factors: tread wear :, tire traction ; and heat resistance =. All tires sold in North America are provided with the corresponding quality class mark on the sidewall of the tire, even though these regulations do not apply to Canada. i The actual values for tires are specific to each vehicle and may deviate from the values in the illustration. Where applicable, the tire grading information can be found on the tire sidewall between the tread shoulder and maximum tire width. For example: Tread wear Traction Temperature A 200 AA i The actual values for tires are specific to each vehicle and may deviate from the values in the illustration. Maximum tire load : is the maximum permitted weight for which the tire is approved. Further information on tire loads (Y page 453). All passenger car tires must conform to the statutory safety requirements in addition to these grades.