WARNING: This page is about a different car, the 2018 BMW 330i xDrive, 2018 BMW 330i, 2017 BMW 330i xDrive, and 2017 BMW 330i. However, it is still accessible from the selected car via links, so may be relevant.
WINDSHIELD WIPER - TECHNICAL DATA SPECIFICATIONS
Angle of attack, wiper arm
Angle of attack identical on the driver's side and the passenger's side.