2009 Mercedes CLK-Class Owner's Manual - Page 252

Operation Tires and wheels Index Speed rating H M+S17 up to 130 mph (210 km/h) V M+S17 up to 149 mph (240 km/h) 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 365), 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. may vary from data shown in above illustration. In addition to tire load rating, special load identification 1 may be molded into the tire sidewall following the letter designating the tire speed rating 6 (Y page 247). RNo specification given: absence of any text (like in above example) indicates a standard load (SL) tire. RXL i Not all M+S rated tires provide special winter performance. Make sure the tires you use show M+S and the mountain/ snowflake.marking 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: RCLK 350 CLK 550: 130 mph (210 km/h) RCLK 63 AMG: 155 mph (250 km/h) RCLK 63 AMG with increased top speed: 174 mph (280 km/h) The factory equipped tires on your vehicle may have a tire speed rating above the 17 or Load identification or Extra Load: designates an extra load (or reinforced) tire. Load: designates a light load tire. D, E: designates load range associated with the maximum load a tire can carry at a specified pressure. RLight RC, 1 Load identification i For illustration purposes only. Actual data on tires are specific to each vehicle and M+S.for winter tires 250