Eco Assist ® System (P469) Ambient Meter The color of the ambient meter changes to green to indicate that the vehicle is being driven in a fuel efficient manner. Quick Reference Guide Models with driver information interface The message is displayed for a few seconds when the ECON button is pressed. ECON Button (P469) Helps maximize fuel economy. ECON Mode Indicator (P92) Comes on when ECON mode is on. * Not available on all models 9