[athikerguy4life]

I just use any old cheap universal style coolant. not a big deal in our cars, and yes, just add it into the overflow resevoir. I've been thinking about doing a how to on coolant changes in the versa. I dont know if we have an actual drain plug, so i'd have to check. if we dont, its just gonna be unclamping the lower hose and letting it drain out.

As for the defrost button, a lot of us have that problem. I'm not sure why it happens..