It doesn't work, you can reproduce by trying the following:
- Make sure you have the Mirror Auto-Tilt option enabled.
- Switch gear to R, the mirrors will tilt down.
- Go to "Controls" and adjust the mirrors while the gear is still in R and the mirrors are in the tilted position.
- Press "Save".
- Switch gear to N and the mirrors will un-tilt.
- Switch gear to R - the mirrors will tilt but not to the position that was saved in step (4), they will just tilt to a default tilted position that it appears cannot be changed.