Lexus 2012 RX450h Owner's Manual page 684

3-7. Other interior features
The clock is displayed when
■
RX350
The clock is displayed when the "ENGINE START STOP" switch is in ACCES-
SORY or IGNITION ON mode.
RX450h
The clock is displayed when the "POWER" switch is in ACCESSORY or ON
mode.
When the 12-volt battery is disconnected
■
The time display will automatically be set to 1:00.
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