Attention! Accuracy of installation of the wiper arm angles improves the quality of the wiper operation.
If there is no brush, you need to install rubber tubes on the wiper arm or wrap the end of the arm with adhesive tape, this will help to avoid scratches on the glass.
The installation of the windshield wiper arms on the windshield and checking their position must be carried out in the following order. Prepare the tools "00.9.221", "00.9.222" and "00.9.331". Install the "00.9.331" device (fig. 16.26) on the windshield near the wiper blade pivot point. The presence of a gap between the gauge and the wiper blade at the top indicates a large lever installation angle.
It is necessary to hold the lever with the device "00.9.222" (fig. 16.27), turn it with the tool "00.9.221" in the direction indicated by the arrow.
The presence of a gap between the gauge and the windshield wiper blade at the bottom indicates that the lever installation angle is too small. You should hold the lever with the device "00.9.222" and turn it with the device "00.9.221" in the opposite direction.
[Information obtained from this online resource «BMWMan.ru»]