2010 Mercedes GL-Class Owner's Manual - Page 252

250 Tires and wheels dimension front vs. rear), tire rotation is not possible. If applicable to your vehicle's tire configuration, tires can be rotated according to the tire manufacturer's recommended intervals in the tire manufacturer's warranty pamphlet located in your vehicle literature portfolio. If none is available, tires should be rotated every 3 000 to 6 000 miles (5 000 to 10 000 km), or sooner if necessary, according to the degree of tire wear. The same rotation (spinning) direction must be maintained. Rotate tires before the characteristic tire wear pattern becomes visible (shoulder wear on front tires and tread center wear on rear tires). Thoroughly clean the mounting face of wheels and brake disks, i.e. the inner side of the wheels/tires, during each rotation. Check for and ensure proper tire inflation pressure. For information on wheel change, see "Flat tire" (Y page 336). Operation : Uniform Tire Quality Grading Standards (Y page 248) ; DOT, Tire Identification Number (Y page 253) = Maximum tire load (Y page 246) ? Maximum tire inflation pressure (Y page 242) A Manufacturer B Tire ply material (Y page 254) C Tire size designation, load and speed Tire labeling Besides tire name (sales designation) and manufacturer name, a number of markings can be found on a tire. Following are some explanations for the markings on your vehicle's tires: rating (Y page 251) D Load identification (Y page 253) E 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 365).