2007 Mercedes SL-Class Owner's Manual - Page 317

Operation Winter driving Before the onset of winter, have your vehicle winterized at an authorized Mercedes-Benz Center. This service includes: Check of anticorrosion and antifreeze concentration. Addition of cleaning concentrate to the water of the windshield and headlamp cleaning system. Add MB Concentrate "S" to a pre-mixed windshield washer solvent/antifreeze which is formulated for temperatures below freezing point ( page 451). Battery test. Battery capacity drops with decreasing ambient temperature. A well charged battery helps to ensure that the engine can be started and the electro-hydraulic brake system will be fully operational even at low ambient temperatures. Tire change. Winter tires Always use winter tires at temperatures below 45°F (7°C) and whenever wintry road conditions prevail. Not all M+S rated tires provide special winter performance. Make sure the tires you use show M+S and the mountain/snowflake symbol.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. Use of winter tires is the only way to achieve the maximum effectiveness of the ABS and ESP® in winter operation. For safe handling, make sure all winter tires mounted are of the same make and have the same tread design. ! When scraping ice or snow from the rear window, be careful not to damage the sealing strip or apertures along the side of the window. 316