Toyota 2013 Prius Owner's Manual page 195

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.
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PRIUS PHV_OM_OM47787U_(U)
To ensure that the sensors operate prop-
erly, do not touch or cover them.