Ensure wipers are parked with the wiper talk switch in the OFF position and the ignition turned OFF. Use a fender cover to protect the windshield. Open the hood and pry off the wiper arm mounting nut cover, then remove the wiper arm mounting nut. If needed, utilize BMW special tool 616060 or an equivalent puller to detach the arm from the pivot. For installation, reverse the removal process, ensuring that each 
Wiper Blade is positioned approximately 55 mm (2 in) from the lower edge of the windshield when parked. After the first use, recheck the torque on the wiper arm fasteners.