Modified windshield wiper
When it is not raining too hard, the water wiped to the left side of the window, comes back up because of the wind and hinders the view through the windshield. Other cars having only one wiper arm—namely Mercedes—have the resting position on the left side of the windshield. This can be achieved on the BX easily: remove the wiper arm and the plastic cover above the wiper and blower motors. Rotate the small iron arm of the wiper rod mechanism by 180° so that the spindle of the arm would rotate in the opposite position. Replace the cover and re-fit the wiper arm, this time to the left of the windshield.