The tilt-down feature only works if the L/R mirror adjust switch is to the left. Leaving it to the right diasbles the tilt-down feature. I have replaced the (black) frame on my right mirror, and now the re-positioning of the mirror when changing gear position to 'R'is no longer working. Maybe I have disconnected a cable or...?? I thought it was only annoying when it worked, but I still would like to fix it! ;-)