Subaru BRZ 2017 Owner's Manual page 264

3-1. Using the air conditioning system and defogger
WARNING
■
When the outside rear view mirror defoggers are on (vehicles with out-
side rear view mirror defoggers)
Do not touch the outside surface of the rear view mirrors, as they can
become very hot and burn you.
CAUTION
■
To prevent battery discharge
Do not leave the rear window defogger on longer than necessary when the
engine is stopped.
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