Just want to share you my story about listening to my new radio and my battery draining. Well after I jumped the Rogue, the dreaded check engine light came on.
As is my good fortune, my Garmin EcoRoute HD came in the mail that very same day.
Attached in 10 seconds, check the code which said something about a memory error and resetted the light 1 minute later. You can even rest the contraption on top of the emergency brakes as a temporary location if you hardly use it.
So whatever the cost of going to to your dealership's service advisor, just subtract that from the cost of the EcoRoute unit on top of the gas savings if you are into that too. I also noticed what others have been saying is that the eco challenge is more accurate with the leaf more 99% green when coasting.
You can show a variety of guages such as: speed, revs per minute, coolant temperature, mass air flow, fuel flow, engine load and throttle position. Also a more advance speedometer.
Still trying to figure out which is useful. Here is a picture of what guages I have.
I assume coolant temperature is good to know if your engine is warm in congruence with the engine temperature light. Battery voltage is helpful when you have alot of accessories. Sorry the picture is bad, I had to angle it because of the glare. I kept the red tape visible so I am aware that it's there.
