Remove the wiper blade

NOTE: TECHNICAL INFORMATION
The wiper arm must not tap the windshield or the rear window without a wiper blade. Otherwise the windshield or the rear window could be damaged.

NOTE: TECHNICAL INFORMATION
In the event of a customer complaint regarding the cleaning or wiping performance or noise generation (windshield wiper judder, squeaking) by the wiper blades, proceed as follows:
Check whether the customer complaint is caused by contamination (preservation wax in new vehicles, tree resin or other environmental influences) on the windshield. If necessary, thoroughly clean the windshield .
Replace the wiper blades if cleaning the windshield fails to remedy the situation.

NOTE: Description is for left component only. Procedure on the right side is identical.

Prepare for operation.
Press wiper-washer switch down, until the wipers stop in a practically vertical position.
Fold out the wiper arm (3) and open the lock (1).
Remove the wiper blade (2) from the wiper arm (3) in the direction of the arrow.

Courtesy of BMW OF NORTH AMERICA, INC.