2011 Mercedes SL-Class Owner's Manual - Page 221

Vehicle care To clean Distronic system sensor cover : and the bumper area near sensors ; observe the following: RUse a mild vehicle wash detergent, such as X 219 Mercedes-Benz approved Car Shampoo, with plenty of water. RUse a soft, non-scratching cloth. ! If you use a power washer to clean the sensor covers, observe the following: RFollow the instructions provided by the power washer manufacturer. RMaintain a distance between the sensor covers and the nozzle of the power washer. 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 ! 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. 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 windows with hard objects such as an ice scraper or ring. Doing so may damage the windows. Rear window cleaning Clean the rear window with the hardtop fully raised and closed. Make sure the hood is fully closed. X Switch on the ignition. X Turn combination switch to wiper setting II (Y page 95). X With wiper arms in vertical position, switch off the ignition. G Warning! G Warning! For safety reasons, switch off wipers and remove SmartKey from starter switch before cleaning the windshield and/or the wiper blades. Vehicles with KEYLESS-GO: Make sure the vehicle's on-board electronics have status 0. Otherwise, the wiper motor could suddenly turn on and cause injury. Do not clean the rear window with the hardtop in a position other than the fully raised and closed position. Otherwise, the hardtop may move unexpectedly which may result in personal injury to you or others. X Use a soft, clean cloth and a mild window cleaning solution on all outside and inside glass surfaces. An automotive glass cleaner is recommended. ! Do not pull on the wiper blade inserts. They could tear. Z Operation Fold the wiper arms forward until they snap into place. X Clean the windshield and the wiper blade inserts with a clean cloth and mild detergent solution. X Use a soft, clean cloth and a mild window cleaning solution on all outside and inside glass surfaces. An automotive glass cleaner is recommended.