I have to agree. I keep a close eye on the coolant levels now on both the Lightning and my wife's MME. I've had to top up both a couple of times. The Lightning is easy to check and can be seen with the Frunk open. The MME is a pain since the Frunk cover needs to be removed to see it and usually needs one or two fasteners replaced when they get lost in the void each time you open the cover.I feel like there was a corelation between low coolant levels and burned out heaters but that is only based on a few comments here.