Buick Regal 2014 Owner's Manual page 142

5-32 Instruments and Controls
Auto Stop Vehicle is stationary
with battery active and no power is
flowing to the wheels.
Engine Power Engine is active
with energy flowing to the wheels.
Engine Idle Vehicle is stationary
with engine active and no power is
flowing to the wheels.
Regen Recovery Power from the
wheels returns to the battery during
regenerative braking or coasting.
Hybrid Power Both the engine and
battery are active with energy
flowing to the wheels.
Power Off No power is flowing to
the wheels.