2011 Mercedes S-Class Owner's Manual - Page 503
2011 Mercedes S-Class Manual
Page 503 highlights
Term definition for tires and loading as specified on the vehicle identification plate on the B-pillar on the driver's side. 501 Maximum tire load The maximum tire load in kilograms or pounds is the maximum weight for which a tire is approved. GVWR (Gross Vehicle Weight Rating) The GVWR is the maximum permissible gross weight of a fully loaded vehicle (the weight of the vehicle including all accessories, occupants, fuel, luggage and the drawbar noseweight if applicable). The gross vehicle weight rating is specified on the vehicle identification plate on the B-pillar on the driver's side. Maximum permissible tire pressure Maximum permissible tire pressure for one tire. Maximum load on one tire Maximum load on one tire. This is calculated by dividing the maximum axle load of one axle by two. Maximum loaded vehicle weight The maximum weight is the sum of the unladen weight of the vehicle, the weight of the accessories, the maximum load and the weight of the optional equipment installed at the factory. PSI (pounds per square inch) Kilopascal (kPa) Metric unit for tire pressure. 6.9 kPa is the equivalent of 1 psi. Another unit for tire pressure is bar. 100 kilopascal (kPa) is the equivalent of 1 bar. Aspect ratio Relationship between tire height and tire width in percent. Tire pressure Load index In addition to the load bearing index, the load index may also be imprinted on the sidewall of the tire. This specifies the load bearing capacity more precisely. Pressure inside the tire applying an outward force to every square inch of the tire's surface. The tire pressure is specified in pounds per square inch (psi), in kilopascal (kPa) or in bar. The tire pressure should only be corrected when the tires are cold. For this, the vehicle must have been stationary for at least three hours or not have traveled more than 1.6 km (1 mile) in this time. Unladen weight The weight of a vehicle with standard equipment including the maximum capacity of fuel, oil and coolant. It also includes the airconditioning system and optional equipment if these are installed on the vehicle, but does not include passengers or luggage. Tire tread The part of the tire that comes into contact with the road. Z Tires and wheels Standard unit of measurement for tire pressure.