2010 Mercedes ML-Class Owner's Manual - Page 240

238 Tires and wheels Index Speed rating Load identification H M+S20 up to 130 mph (210 km/h) V M+S20 up to 149 mph (240 km/h) i Not all M+S rated tires provide special winter performance. Make sure the tires you use show M+S and the mountain/ snowflakeimarking on the tire sidewall. These tires meet specific snow traction performance requirements of the Rubber Manufacturers Association (RMA) and the Rubber Association of Canada (RAC) and have been designed specifically for use in snow conditions. An electronic speed limiter prevents your vehicle from exceeding a speed of: RAll models except ML 63 AMG: 130 mph (210 km/h) RML 63 AMG: 155 mph (250 km/h) RML 63 AMG with increased top speed: 171 mph (275 km/h) The factory equipped tires on your vehicle may have a tire speed rating above the maximum speed permitted by the electronic speed limiter. Make sure your tires have the required tire speed rating as specified for your vehicle in the "Technical data" section (Y page 352), for example when purchasing new tires. If you are uncertain about the correct reading of the information given on a tire's sidewall, any authorized Mercedes-Benz Center will be glad to assist you. Operation i For illustration purposes only. Actual data on tires are specific to each vehicle and may vary from data shown in above illustration. In addition to the load index, special load identification : may be molded into the tire sidewall following the letter designating the speed symbol B (Y page 236). RNo specification given: absence of any text (like in above example) indicates a standard load (SL) tire. RXL or Extra Load: designates an extra load (or reinforced) tire. RLight Load: designates a light load tire. RC, D, E: designates load range associated with the maximum load a tire can carry at a specified pressure. DOT, Tire Identification Number (TIN) U.S. tire regulations require each new tire manufacturer or tire retreader to mold a TIN into or onto a sidewall of each tire produced. 20 or M+Sifor winter tires