2004 Mercedes SL-Class Owner's Manual - Page 268

Operation Tires and wheels Rotating wheels ! Warning! G Rotate front and rear wheels only if they are of the same size. On vehicles with the same wheel size all around, wheels can be rotated every 3000 to 6 000 miles (5 000 to 10 000 km), or sooner if necessary, according to the degree of tire wear. The same direction of tire rotation must be retained. Rotate the wheels before the characteristic tire wear pattern becomes visible (shoulder wear on front wheels and tread center wear on rear wheels). If your vehicle is equipped with a tire inflation pressure monitor*, there are electronic components built into the wheel. Do not use mounting tools in the area of the valve as they could damage the electronic components. To prevent damage or incorrect installation, have the tires changed at an authorized Mercedes-Benz Center. Thoroughly clean the inner side of the wheels after each rotation. Check and ensure proper tire inflation pressure, activating the tire inflation pressure monitor if necessary. Warning! G Have the tightening torque checked after changing a wheel. Wheels could become loose if not tightened with a torque of 96 lb-ft (130 Nm). Only use genuine Mercedes-Benz wheel bolts specified for your vehicle's rims. For information on wheel change, see the "Practical hints" section ( page 323) and ( page 339). 267