Toyota 2012 Prius Owner's Manual page 197

1-5. Adjustable components (seats, mirrors, steering wheel)
■
To prevent sensor error (vehicles with auto anti-glare inside rear view
mirror)
Without garage door opener
With garage door opener
CAUTION
■
Caution while driving
Do not adjust the position of the mirror while driving.
Doing so may lead to mishandling of the vehicle and cause an accident,
resulting in death or serious injury.
168
PRIUS PHV_OM_OM47818U_(U)
To ensure that the sensors operate prop-
erly, do not touch or cover them.