One problem related to wiper has been reported for the 2012 BMW 535. The most recently reported issues are listed below.
The headlight get condensation inside which reduces intensity of head light. This condensation has now corrupted the adaptive headlight control module which made the turn signal not work. The design of the head light mounting makes for a very expensive repair and/or replacement by have to remove bumper just to get to headlight. 1. Condensation reduces intensity of headlights 2. Moisture corroded adaptive headlight controller module that also made turn signal not work. 3. Very complicated access to headlight to repair (very expensive).