These consist of: a charge / assist gauge, which indicates whether the hybrid system's electric motor is assisting the gasoline engine or whether the battery is being recharged; an ECO light, which
shows when the car's instant
gas mileage is meeting or exceeding the
average EPA rating; and an Autostop readout on the tachometer, which indicates that the engine has been cut during idling.
optional on the Pontiac Solstice and controlled by a button on the steering wheel that cycles through a list of data
shown via a dot - matrix display in the center of the speedometer, including
average gas mileage, range to empty, and
average speed.