51 24 ... Removing And Installing/Replacing Trim On Shaft Bearing For Rear Window Wiper

Lever out covers (1).

Installation: 

Catches (2) of covers (1) must not be damaged.

Fig 1: Locating Catches On Cover

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Release nuts (1) and remove trim (2).

Fig 2: Releasing Trim Nuts

Courtesy of BMW OF NORTH AMERICA, INC.