2008 Mercedes S-Class Owner's Manual - Page 534

Operation Driving instructions An electronic speed limiter prevents your vehicle from exceeding a speed of All models except S 63 AMG and S 65 AMG: 130 mph (210 km/h) S 63 AMG: S 65 AMG: 155 mph (250 km/h) S 63 AMG with increased top speed*: S 65 AMG with increased top speed*: 186 mph (300 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 ( page 718), for example when purchasing new tires. For information on how to identify the tire speed rating on a tire's sidewall, see "Tire size designation, load and speed rating" ( page 568). 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. Warning! G i For information on speed ratings for winter tires, see ( page 571) and ( page 580). Winter driving instructions The most important rule for slippery or icy roads is to drive sensibly and to avoid abrupt acceleration, braking and steering maneuvers. Do not use the cruise control or DISTRONIC Plus* system under such conditions. When the vehicle is in danger of skidding, move gear selector lever to neutral position N. Try to keep the vehicle under control by corrective steering action. On slippery road surfaces, never downshift in order to obtain braking action. This could result in drive wheel slip and reduced vehicle control. Your vehicle's ABS will not prevent this type of control loss. Road salts and chemicals can adversely affect braking efficiency. Increased pedal force may become necessary to produce the normal braking effect. Depressing the brake pedal periodically when traveling at length on salt-strewn roads can bring road-salt impaired braking efficiency back to normal. If the vehicle is parked after being driven on salt-treated roads, the braking efficiency should be tested as soon as possible after driving is resumed. i For information on driving with snow chains, see "Snow chains" ( page 581). 533