First, bring the fingers close and try to hold the plastic cap of wiper and rotate it anticlockwise direction to remove it from the
Wiper Pivot. Then we have to take the wiper arm off the rear window, turning it as we do, and unscrew the mounting nut. Remove the wiper arm from the pivot using a puller as BMW special tool 61 6 060 or with an equivalent. It is recommended that the wiper assembly be in the PARK position before the wiper arm is installed; this may be done with the ignition ON and the rear wiper ran for two full cycles; subsequently, turn the ignition OFF and wait for the wiper motor to stop before turning off the ignition. After that, join the wiper arm to the car and loosely secure the mounting nut, you then examine and align the
Wiper Bladed and finally torque the arm to its required specification.