When driving after dark, the automatic dimming rearview mirror reduces the glare from headlights behind you, based in inputs from the mirror sensor. This feature is always active.
The auto dimming function cancels when the shift position is in R.
Honda Civic Owners Manual. Side Curtain Airbags
The side curtain airbags help protect the heads of the driver and passengers
in the
outer seating positions during a moderate-to-severe side impact. The side
curtain
airbags equipped in this vehicle are also designed to help reduce the likelihood
of
partial and complete ejection of vehicle ...