Toyota Matrix 2009 Owner's Manual page 26

1-3. Adjustable components (seats, mirrors, steering wheel)
To prevent sensor error
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CAUTION
Caution while driving
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Do not adjust the position of the mirror while driving.
Doing so may lead to mishandling of the vehicle and an accident, resulting in
death or serious injury.
48
To ensure that the sensors operate prop-
erly, do not touch or cover them.