2005 Mercedes SL-Class Owner's Manual - Page 388
2005 Mercedes SL-Class Manual
Page 388 highlights
Practical hints Replacing wiper blades ! To avoid damage to the hood, the wiper arms should only be folded forward when in the vertical position. Removing wiper blades Fold the wiper arm forward until it snaps into place. Warning! G 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 replacing a wiper blade. Otherwise the wiper motor could suddenly turn on and cause injury. Turn SmartKey in starter switch to position 1. Turn combination switch to wiper setting II ( page 53). With wiper arms in the vertical position, turn SmartKey in starter switch to position 0. Turn wiper blade at a right angle to the wiper arm. Slide the wiper blade sideways out of the retainer. 386