One important detail - the mirror assemblies for 1986-on cars are DIFFERENT although they look very similar. MB changed the contacts for the lighting from the outer pivot points to a spring loaded contact switch in the center. The entire mirror assembly may be physically interchangeable across pre and post 1986, models but the flip open doors are not! Also, the electrical contacts on 1986-on cars are soldered directly to a board that bridges the two bulbs. The earlier version uses spade connectors.