2011 Mercedes SL-Class Owner's Manual - Page 203

Tires and wheels Following are some explanations for the markings on your vehicle's tires: 201 Tire size designation, load and speed rating : Tire width ; Aspect ratio in % = Radial tire code ? Rim diameter : Uniform Tire Quality Grading Standards ; = ? A B C D E A Load index B Speed symbol (Y page 199) DOT, Tire Identification Number (Y page 204) Maximum tire load (Y page 197) Maximum tire inflation pressure (Y page 193) Manufacturer Tire ply material (Y page 205) Tire size designation, load and speed rating (Y page 201) Load identification (Y page 204) Tire name i For illustration purposes only. Actual data on tires are specific to each vehicle and may vary from data shown in above illustration. For more information, see "Rims and tires" (Y page 299). i For illustration purposes only. Actual data on tires are specific to each vehicle and may vary from data shown in above illustration. General: Depending on the design standards used, the tire size molded into the sidewall may have no letter or a letter preceding the tire size designation. No letter preceding the size designation (as illustrated above): Passenger car tire based on European design standards. Letter "P" preceding the size designation: Passenger car tire based on U.S. design standards. Letter "LT" preceding the size designation: Light Truck tire based on U.S. design standards. Letter "T" preceding the size designation: Temporary spare tires which are high pressure compact spares designed for temporary emergency use only. Tire width Tire width : indicates the nominal tire width in millimeters. Z Operation