2009 Mercedes SL-Class Owner's Manual - Page 249

Operation Vehicle care X Restart the engine after cleaning sensor cover 1. Cleaning the windows and the wiper blades ! The windshield wipers must be in a vertical position before folding them away from the windshield. They could otherwise damage the hood. Never open the hood when the wiper arms are folded forward. X X X X X X Fold the wiper arms forward until they snap into place. Clean the windshield and the wiper blade inserts with a clean cloth and mild detergent solution. Use a soft, clean cloth and a mild window cleaning solution on all outside and inside glass surfaces. An automotive glass cleaner is recommended. Cleaning the Parktronic system sensors Parktronic system sensors are located in the front and rear bumper. X Make sure the hood is fully closed. Switch on the ignition. Turn combination switch to wiper setting II (Y page 105). With wiper arms in vertical position, switch off the ignition. 1 Parktronic system sensors in front bumper X X Only clean sensor cover by hand. Use a mild vehicle wash detergent, such as Mercedes-Benz approved Car Shampoo, with plenty of water and a soft, nonscratching cloth to clean sensors 1 on the bumpers. G Warning! For safety reasons, switch off wipers and remove SmartKey from starter switch (vehicles with KEYLESS-GO: Make sure the vehicle's on-board electronics have status 0) before cleaning the windshield and/or the wiper blades. Otherwise, the wiper motor could suddenly turn on and cause injury. ! Do not pull on the wiper blade inserts. They could tear. ! Fold the windshield wiper arms back onto the windshield before turning the SmartKey in the starter switch or pressing the KEYLESS-GO start/stop button (vehicles with KEYLESS-GO). Hold on to the wiper when folding the wiper arm back. If released, the force of the impact from the tensioning spring could crack the windshield. ! To clean the window interior, do not use a dry cloth, abrasives, solvents or cleaners containing solvents. Do not touch the inside of the front, rear or side windows with hard objects such as an ice scraper or ring. Doing so may damage the windows. Z ! Applying strong pressure may damage the sensor covers. 247